Bukh Dv36 48 Workshop Manual 1003418 009W2329_SECTION Any User

2017-02-23

User Manual: Bukh Bukh-Dv36-48-Workshop-Manual-1003418

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Contents
A: Introduction and technical data
B: List of tools
C: Cylinder head
D: Flywheel
E: Front end cover
G: Rear end cover and hand start
H: Fuel system
IJ: Piston, connecting rod and cylinder liner
L: Crankcase, crank, bearings and oil sump
M: Camshaft
N: Lubricating system
O: Cooling water system
P: Electrical system
R: ZF gear - BW7
S: Sail drive
T: Irregular operation, causes and remedies
V: Maintenance

009W2329-R01

Publ. No.

009W2329

Work shop Manual

for

BUKH diesel engine

TYPE DV36/48

Aabenraavej 13-17, DK - 6340 Krusaa, Denmark

Tel: +45 74 62 20 88

Fax +45 74 62 74 07

E-mail: bukh@bukh.dk – Internet: www.bukh.dk

009W2329-R01

Contents

Section A … Introduction and technical data

Section B … List of tools

Section C … Cylinder head

Section D … Flywheel

Section E … Front end cover

Section G … Rear end cover and hand start

Section H … Fuel system

Section IJ … Piston, connecting rod and cylinder liner

Section L … Crankcase, crankshaft, main bearings and oil sump

Section M … Camshaft

Section N … Lubricating oil system

Section O … Cooling water system

Section P … Electrical system

Section R … Gearbox ZF, BW7

Section S … Sail drive

Section T … Irregularities in operation - causes and remedies

Section V … Maintenance

009W2329

SECTION A

INTRODUCTION AND TECHNICAL DATA

009W2329

CONTENTS

Introduction ................................................................................ page A 3

Technical Data ........................................................................... page A 4

Torques ..................................................................................... page A 5

Spare Part Nos. for Service Parts .............................................. page A 6

Torque and Rating Curves ......................................................... page A 7

Results of Measurement ............................................................ page A 8

Longitudinal Section of DV36 .................................................... page A 9

Cross Section of DV36 .............................................................. page A 10

Diagram of the Relation between the Total Weight,

Speed and Horse Power of the Boat ......................................... page A 11

009W2329

Introduction

The engines are specially designed to comply with the heavy demands made on stability,

safety and environment now.

The technical structure of the engine with components and systems appears from the

individual sections of this workshop manual and therefore this introduction contains no

descriptions of this.

DV36 is designed with small installation dimensions compared to corresponding engine

outputs on the market. This applies to both height, length and width. At the same time the

weight of the engine is comparatively low and the proportion weight/horse power is in fact only

7.36 compared to corresponding engine outputs on the market with a corresponding factor of

8.28 and 8.48.

Being a 3-cylinder engine, DV36 is a naturally low level of vibration compared to 1- and 2-

cylinder engines, but in order to obtain a further improvement of the vibration level, the rotating

weight system has been continued on DV36 as it is known with great success from DV10 and

DV20. DV36 with the anti-vibration system is thus free from unpleasant vibrations and may

correctly be described as the less vibrating engine on the market.

DV36 is supplied either with sail-drive (type DV36SME) or with BW7 gear (type DV36ME). The

type description S = saildrive, M = marine gear and E = with electric start.

The temperature of the exhaust gas is for DV36 max. 550°C, which is about 100°C below

corresponding engine outputs on the market.

DV36 is delivered as standard with direct seawater cooling but may be alternatively be

delivered with heat exchanger built integral with water cooled exhaust, keel cooler or radiator

cooler.

BUKH DV36 is a 3-cylinder, water cooled, 4-stroke diesel engine with direct injection, giving

an easy start at low temperatures, a low consumption of fuel and a low thermic load of the

cylinder head.

009W2329

TECHNICAL MAIN DATA

WORKING PRINCIPLE……………………………………………………… ... 4-STROKE

BORE/STROKE ...................... ................................ ................................... 85 mm / 85 mm

CYLINDER VOLUME ............. ................................ ................................... 1.447 Litres

COMPRESSION RATIO ......... ................................ ................................... 18,5:1

COMPRESSION PRESSURE …. ................. at 1800-3600 rpm………… .. 46 Bar

OUTPUT, CONTINOUS RATING.…. ............ at 2400 rpm………..……… .. 29.8 BHP - 21.9 kW

ACCORDING TO ISO 3046……. .................. at 3000 rpm…………………..34.5 BHP – 25.4 kW

.............. at 3600 rpm…………………. 36.0 BHP - 26.5 kW

OUTPUT, INTERMITENT RATING BHP ....... at 4000 rpm ......................... 39.3 BHP – 28.9 kW

MAX. TORQUE Kp*m ............. ...................... at 1800 rpm .......................... 9.2 Kpm – 90 Nm

MAX. AIR CONSUMPTION .... ................................ ................................... 2214 Litres/min.

ENGINE ROTATING, LOOKING AT FLYWHEEL .. ................................... CLOCWISE

IDLING SPEED ....................... ................................ ................................... 800 – 1000 RPM

MAX INCLINATION, FORE AND AFT ..................... ................................... 15o

HEEL, MAX. CONTINOUS ..... ................................ ................................... 30o

NET WEIGHT INCL. ZF MARINEGEAR ................. ................................... 265 Kg

NET WEIGHT INCL. SAILDRIVE ............................ ................................... 290 Kg

LOCATION OF ENGINE SERIAL NUMBER ........... ................................... ON CRANKCASE NEAR FUEL THE PUMP

EXHAUST TEMP. MAX / NORMAL ......................... ................................... 600oC – 580oC

VALVE TIMING AND INJECTION POINT

FLYWHEEL DIAMETER ......... ................................ ................................... 370 mm

INLET VALVE OPENS .................. BEFORE TDC . ................................... 32o (arc measure: 103 mm)

INLET VALVE CLOSES ............... AFTER BDC .... ................................... 64o (arc measure: 207 mm)

EXHAUST VALVE OPENS ............ BEFORE BDC . ................................... 64o (arc measure: 207 mm)

EXHAUST VALVE CLOSES ......... AFTER TDC .... ................................... 32o (arc measure: 103 mm)

INJECTION STARTS……… .......... BEFORE TDC……………………… ..... 6.2o (arc measure: 20 mm)

VALVE CLEARANCES (COLD ENGINE) INLET/EXHAUST ...................... 0.30 mm

FUEL SYSTEM ...................... ................................ ................................... DIRECT INJECTION

INJECTOR OPENING PRESSURE ........................ ................................... 210 Bar

INJECTION TIMING .............. ................................ ................................... AUTOMATIC VARIABLE

FUEL LIFT PUMP ................... ................................ ................................... CAM SHAFT DRIVEN DIAPHRAGM PUMP

STATIC PRESSURE OF FUEL LIFT PUMP ........... ................................... 153 - 285 mBar

FUEL FILTER ......................... ................................ ................................... THROW AWAY FILTER INSERT

FUEL QUALITY GAS OIL ....... ................................ ................................... BS 2869 CLASS A

LUBRICATING SYSTEM

TYPE OF LUBRICATING OIL PUMP ...................... ................................... ROTARY VANE PUMP

LUBRICATING OIL PRESSURE: WARM ENGINE / MINIMUM ................. 2-4.5 Bar / 1 Bar

LUBRICATING OIL QUALITY ................................ ................................... SERVICE CC or CD

LUBRICATING OIL VISCOSITY .... BELOW +5oC ...................................... SAE 10 or SAE 10W-30

BETWEEN +5oc and +25oC ................ SAE 20 or SAE 15W-40

ABOVE +25oC . ................................... SAE 30 or SAE 15W-40

LUBRICATING OIL CONTENT INCL. FILTER ........ ................................... 4.9 Litres

LUBRICATING OIL FILTER .. ................................ ................................... THROW AWAY FILTER INSERT

ZF BW7 MARINEGEAR

LUBRICATING OIL QUALITY ................................ ................................... API CC or CD, MILL-L-46152

LUBRICATING OIL VISCOSITY .............................. ................................... SAE 30 or SAE 15W-40

LUBRICATING OIL TEMPERATURE...................... ................................... MAX. 120oC

LUBRICATING OIL CONTENT ............................... ................................... 1.1 Litres

NEWAGE PRM120 MARINEGEAR

LUBRICATING OIL QUALITY ................................ ................................... Automatic Transmission Fluid (ATF)

LUBRICATING OIL TEMPERATURE...................... ................................... MAX. 120oC

LUBRICATING OIL CONTENT ............................... ................................... 0.8 Litres

009W2329

BAYSAN M60 MARINEGEAR

LUBRICATING OIL QUALITY ................................ ................................... Automatic Transmission Fluid (ATF)

LUBRICATING OIL TEMPERATURE...................... ................................... MAX. 120oC

LUBRICATING OIL CONTENT ............................... ................................... 0.5 Litres

STERN TUBE (FLEXIBLE) LUBRICANT ................ ................................... OUTBOARD GEAR OIL

COOLING WATER SYSTEM – DIRECT SEAWATER COOLING

COOLING WATER TEMPERATURE ...................... ................................... 50 – 65oC

TYPE OF CIRCULATING PUMP / CAPACITY AT 3600 rpm ..................... CENTRIFUGAL / 24-30 Litres/min

CAM HEIGHT ......................... ................................ ................................... 2.0 mm

MAX. PUMP COUNTER PRESSURE ..................... ................................... 0.6 Bar

MAX. PUMP SUCTION PRESSURE....................... ................................... 0.3 Bar

COOLING WATER SYSTEM – INDIRECT COOLING WITH FRESHWATER

COOLING WATER TEMPERATURE ...................... ................................... 70 – 95oC

TYPE OF FRESHWATER PUMP / CAPACITY AT 3600 rpm ..................... CENTRIFUGAL / 135 Litres/min

PUMP PRESSURE ................. ................................ ................................... 1.1 Bar

TYPE OF SEAWTAER PUMP / CAPACITY AT 3600 rpm .......................... CENTRIFUGAL / 36-42 Litres/min

CAM HEIGHT ......................... ................................ ................................... 3.1 mm

MAX. PUMP COUNTER PRESSURE ..................... ................................... 0.6 Bar

MAX. PUMP SUCTION PRESSURE....................... ................................... 0.3 Bar

ELECTRICAL SYSTEM

BATTERY VOLTAGE / CAPACITY ............................................................ 12 VOLT / 88 Ah

STARTER TYPE / OUTPUT ....................................................................... GEAR DRIVEN / 1.0 KW

ALTERNATOR TYPE/ OUTPUT ................................................................ BELT DRIVEN / 700 W

ENGINE STOP ........................................................................................... SOLONOID / MANUAL

RELAY ........................................................................................................ ELECTRONIC, BUILT ON

TORQUES

CYLINDER HEAD BOLTS/BEARING TOP SECTION ................................ 118 +/- 5 Nm (12 +/- 0.5 Kpm)

CONNECTING ROD BOLTS . .................................................................... 69 +/- 3 Nm (7 +/- 0.3 Kpm)

FLYWHEEL/COUNTERWEIGHTS ... .......................................................... 147 +/- 7 Nm (15 +/- 0.7 Kpm)

FLEX. COUPLING .................. .................................................................... 61 +/- 3 Nm (6.3 +/- 0.3 Kpm)

ASSEMBLY OF FUEL VALVE .................................................................... 59 +/- 3 Nm (6.0 +/- 0.3 Kpm)

BRACKET FOR ENGINE SUPPORTS ....................................................... 69 +/- 3 Nm (7 +/- 0.3 Kpm)

GEARBOX .............................. .................................................................... 25 +/- 5 Nm (2.5 +/- 0.5 Kpm)

009W2329

Spare Part Numbers for Service Parts

In this manual we have maintained on the drawings some numbers which are also spare part

numbers. However, this manual is not to be regarded as a spare parts catalogue but only as

helping guidance for correct identification of parts.

In the daily service work, some of the parts must be replaced after the number of hours stated

in the owner´s manual and in this book, and therefore we have made the following table:

610J0200 Lubricating oil filter

610D0201 Fuel filter

020D4326 Air filter

000E0450 Sacrificial zinc anode

610G0506 Impeller

542A0602 V-belt 10*1035 (seawater cooling)

542A0609 V-belt 10*1100 (freshwater cooling)

009W2329

Results of Measurement

The below curves indicate results of measurements at 762 mm Hg and a room temperature of 26 °C.

009W2329

Longitudinal Section of DV36

A10

009W2329

Cross Section of DV36

A11

009W2329

Diagram of the Relation between the Total Weight,

Speed and Horse Power of the boat

The below diagram is normative and not binding in any way as many different circumstances

influence the result, especially the type and shape of the boat, the propeller and its placing as

well as the horse power of the engine.

Seek the scheme to the right of the intersection between the actual length in the waterline of the

ship and the total weight.

Draw a straight line between this point (the intersection) and the fixed point in the bottom left corner.

Where the line of the desired speed crosses the straight line, you can read the required horse

power vertically below.

If you know three of the specifications, you can by means of these schemes find the fourth one.

009W2329-R01

SECTION B

LIST OF TOOLS

009W2329-R01

CONTENTS

Tools for repairs on DV36 .......................................................... page B 3

Dimensions of mounting punches ............................................. page B 6

009W2329-R01

Tools for repairs on DV36

The below mentioned tools are necessary to make the engine repairs described in this

manual.

Part of the tools are special tools which can be ordered from the spare parts department at

BUKH.

We have indicated the fields of application for the special tools in this manual.

Designation of tools Fields of application Spare part No.

Slip-on ring for mounting of

pistons

Section IJ

Puller for cylinder liner

Section IJ

009P2235

Punch for rear seal ring

Section G

009P3177

Punch for front seal ring

Section E

009P3178

Punch for mounting of

camshaft bearing in block

Section M and L

009P3179

Punch for journal for

intermediate wheel

Section G

009P3180

Punch for journal for front and

rear rotating weight

Section E and G

009P3181

Punch for mounting of valve

guide

Section C

009P3175

Punch for mounting of inlet

valve seat

Section C

009P3173

Punch for mounting of exhaust

valve seat

Section C

009P3174

Punch for mounting of expan-

sion discs in the cylinder head

Section C

009P3176

009W2329-R01

Designation of tools Fields of application Spare part No.

36 mm socket spanner

19 mm socket spanner for

fastening of cylinder head

Section C

19 mm crowfoot wrench for

tightening up of cyl. head

Section C

009P3225

10 mm Allen top for faste-ning of

bearing top section

Section L

5 mm Allen key

6 mm Allen key

7 mm Allen key

Open-end spanner/ring spanner,

8/10/12/13/14/15/17/19/22/24/27

30 and 32 mm

Dismantling tool for valve

springs

Section C

009P3115

Tachometer

Generally

009P3106

Testing set for fuel nozzles

Section H

009P3100

Cleaning for fuel nozzles

Section H

009P3101

Bosch dial indicator for

adjustment of fuel pump

Section H

Bosch dial indicator “holder with

extension” for adjustment of the

fuel pump (KDEP1085)

Section H

529W0002

009W2329-R01

Designation of tools Fields of application Spare part No.

Flanging tools for nozzle holder

insert

Section C

009P2565

Torque wrench

(Stahlwille 73/6 1.5-6.5)

Generally

009P3108

Torque wrench

(Stahlwille 73/25 8-26)

Generally Section C, D,

IJ and L

009P3109

Circlip tongs (external)

A1, 10-28 mm

Circlip tongs (internal)

J2, 19-75 mm

Puller for gear wheel

(Kukko 20/10)

Generally

Puller for flexible coupling

Section R

T 41069

Compression gauge

Section C

529W0000

Adapter for compression gauge

Section C

009P3123

Part of the mentioned special tools can be manufactured without too much trouble at the

dealer´s workshopin periods outside the boat season. Therefore we have made sketches at

page B6 of each individual mounting punch with dimensions.

Slip-on ring for mounting of pistons is not illustrated but is manufactured of a worn out

cylinder liner or another piece of work pipe. Cut the cylinder liner so that you get a piece

being about 100 mm high, the turn it conical inside the liner or pipe.

009W2329-R01

SECTION C

CYLINDER HEAD

009W2329-R01

CONTENTS

Exploded view of cylinder head complete ................................. page C 3

Valve adjustment ...................................................................... page C 4

Removal and refitment of cylinder head ................................... page C 5

Replacement of rocker arm or rocker shaft .............................. page C 6

Adjustment of valve lifter arrangement ..................................... page C 6

Replacement of rocker arm bushing ......................................... page C 7

Removal of fuel valves ............................................................. page C 8

Nozzle holder insert .................................................................. page C 9

Fitting measures for fuel nozzle insert ...................................... page C 10

Valve springs ............................................................................. page C 11

Replacement of valve guides .................................................... page C 12

Pressing-in dimensions for valve guide ..................................... page C 13

Valve guide stuffing box ............................................................ page C 14

Repair or replacement of inlet and exhaust valves .................... page C 15

Exhaust valve ............................................................................ page C 16

Inlet valve .................................................................................. page C 17

Grinding of valves ...................................................................... page C 18

Measures for new valves ........................................................... page C 18

Replacement of valve seats ..................................................... page C 19

Cylinder head gasket ................................................................ page C 20

Air inlet manifold arrangement ................................................... page C 21

Exhaust manifold arrangement .................................................. page C 22

009W2329-R01

Exploded view of cylinder head

009W2329-R01

Valve adjustment

Adjust the valves by loosening the counter nut A which makes it possible to adjust the

clearance by means of the adjusting screw B.

Measure the clearance with a feeler gauge at C.

The clearance of the inlet and exha ust valves should be adjusted at 0.3 mm w hen the

engine is cold and the clearance of the valves should always be checked after tightening-

up of the c ylinder head. The valv es are adjusted when the pisto ns are alternately at their

highest point in the working stroke.

009W2329-R01

Removal and refitment of cylinder head

1. Drain off the cooling water.

2. Remove the top cover.

3. Remove valve rocker arms.

4. Remove the inlet and return pipes of the fuel valves.

5. Remove the charging alternator.

6. Remove the exhaust and inlet manifold.

7. Loosen the top bolts, after which the cylinder head can be lifted out of the engine block.

8. Refitment of the cylinder head is made in reverse order and the bolts are tightened

evenly at a torque of 118±5 Nm (12±0.5 kpm). Tighten in the order shown on the

skeleton diagram below.

009W2329-R01

Replacement of rocker arm or rocker shaft

For each cylinder, a rocker arm column wit h two rocker arms for inlet valve and exhaust

valve, respectively, is fitted on a common shaft with corresponding rocker arm columns and

rocker arms for the two other cylinders.

1. Remove the top cover.

2. Unscrew the three central nuts on the rocker arm columns.

3. Lift off the shaft arrangement.

4. Knock out the tube pin and washer in one of the shaft ends.

5. Then the rocker arms and the intermediate springs can be taken out.

Reassembly is a reversal of the dismantling procedure.

Adjustment of valve lifter arrangement

Furthermore, a common shaft for decompression is fitted on the three rocker arm

columns.

For a possible removal of the shaft, remove first the pins going down on the rocker arms

at decompression, after which the shaft can be pulled out.

When adjusting, adjust the pins so that you faintly see a single groove of the pin thread

(about 1.5 mm free pin) just on the side facing the rocker arms.

When fitting the top cover, ensure that the slot in the decompression handle in the top

cover mesh with the corresponding pin on the decompression shaft.

009W2329-R01

Replacement of rocker arm bushing

1. Remove the rocker arm as indicated on page C5 and check it as to wear and tear

as well as fracture.

2. Press out the defective bushing with an adequate tool.

3. Fit the new bushing as shown below paying special attention to the position of the

bearing joint and the oil grooves.

4. When fitted, calibrate the bearing bush so that the tolerance ø19-R7 is observed.

Do this either with a calibration ball or with a reamer having the mentioned tolerance.

5. After refitting the rocker arm, check the axial play with a feeler gauge. The axial

play may be 0.1 – 0.2 mm.

6. Finish refitting the rocker arm arrangement.

drwg. No. 008E4893

009W2329-R01

Removal of fuel valves

The fuel valves are removed by loosening the clamping nuts for the flanges A as indicated on

the sketch below after removal of the inlet and return pipes of the fuel valves.

The drawing at the bottom right-hand side indicates the placing of the fuel valve in proportion

to the piston.

For repair of the fuel valves, we refer to section H.

009W2329-R01

Nozzle holder insert

The nozzle holder inserts are placed in the cylinder head and form – a the name indicates –

an insert for the placing of the fuel valves in the cylinder head.

The nozzle holder inserts can be replace d, which demands that the sp ecial tools below for

flanging (piston and backstop) are used and that t he surfaces are treated as indicated on the

drawing.

Remove the old nozz le holder inserts by bor ing-up the flanged end of the nozzle holder

inserts with a ø8 – ø9 mm drill, and then k nock out the nozzle h older inserts with a 10 mm

punch.

After having fitted the new nozz le holder insert s, test the cylinder head for pressure with

water in order to check the flanged seals.

drwg. No. 008E4881

009W2329-R01

C10

Fitting measurements for the fuel nozzle into insert.

009W2329-R01

C11

Valve springs

Six identical springs for inlet and exhaust valves, respectively, are fitted in the cylinder head.

The springs are identical in both ends, and therefore fitting up or down is of no importance.

The springs are locked in their position in proportion to the valve stems by means of two

conical halves for each valve spring and guided by a guide for valve spring and a

corresponding disc, respectively.

The valve springs are removed by compressi ng the valve springs and removing the c onical

locking halves with s pecial tools or the like so the valves are cut off fro m following the

movement of the springs.

When refitting the valve springs, make sure t hat the conical loc king halves are correctly

placed in their trace on the va lve stems. This can be done by knocking gently with a plastic

hammer on top of the valve stem while the cylinde r head is lifted from the file bench so that

the valve heads can move so as to be clear of the valve seats.

009W2329-R01

C12

Replacement of valve guides

Replace the valve guides whic h are pressed into the cylinder head if the tolerance is

exceeded because of wear and tear by 0.05 mm. Check the measure with a ø9 – H7 internal

gauge according to the drawing below of the valve guide.

Fit new valve guides according to the drawing on page C13. Before fitment, heat the cylinder

head in an oven or heat it in boiling water and cool down t he valve guides in a deep freezer

or otherwise.

After fitment of new valve guides, broach the bore of the valve guides with a broach in order to

remove possible ups ettings from the fitti ng. Use a broach ø 9 – H7 for the broaching.

009W2329-R01

C13

Pressing-in dimensions for valve guide.

009W2329-R01

C14

Valve guide stuffing box

In order to avoid lubricating oil consumption because of lubricating oil passing between valve

guide and valve stem causing the valves to be burnt or to be carbonized, a stuffing box has

been mounted on the upper end of the valve guides.

The stuffing box is as shown schematically on the drawing below and consists of:

A: Metal spring coat

B: Plastic bushing

C: Spring wire

The stuffing box compensates for wear and tear of the valve guides so that the lubricating oil

consumption because of leaky valve guides is reduced to a minimum.

The stuffing box cannot be repaired but has to be replaced if necessary.

009W2329-R01

C15

Repair or replacement of inlet and exhaust valves

1. Remove the cylinder head from the engine (page C5).

2. Then place the cylinder head on a file bench or the

like with the valve seats at the bottom.

3. Compress the valve springs with a special tool or the

like and remove the conical valve locking halves.

4. Then place the cylinder head upright and remove the

valves from the cylinder head.

Refitment is a reversal of removal procedure.

Note! Refit the valves in the same valve guides again.

Replace the valves if they are so damaged that a refacing with special tools and subsequent

grinding are impossible without exceeding the tolerances indicated on page C18 and C19.

A refacing of the valve seats with fixed guide should always be made if the valve does not

function satisfactorily.

After replacement of valve or valve seat, grind together with abrasive compound seat and valve

so that total tightness is obtained. It is an indispensable condition for the compression of the

engine that this work is performed carefully.

Grinding of valves is made as described on page C18.

009W2329-R01

C16

Exhaust valve

Tolerances and repair measures.

009W2329-R01

C17

Inlet valve

Tolerances and repair measures.

009W2329-R01

C18

Grinding of valves

1. Place the cylinder head with the valve seats upwards. Block the cylinder head so that

the valves fit tightly against the seats and can be turned freely by means of a rubber

suction disc or the like.

2. Apply abrasive compound to valve and seat, after w hich grinding can tak e place.

3. When grinding, turn the valve by means of the rubber suction disc in various directions

while fitting it at the same time with an equal pressure against the seat. When

grinding, lift frequently the va lve and spread all over the seat the abrasive c ompound

applied.

4. You can c heck whether the valve is ti ght by cleaning off the abrasive compound

carefully by for exam ple cleaning liquid. Then make 4 pencil m arks staggered 90

degrees from each ot her on the c ontact face of the valve. Insert the valv e and turn it

about 20 degrees. If the valve is tigh t, the marks will have disappeared.

5. Before refitment in the cylinder head, cl ean the valve carefully for abrasive compound

and apply a thin coat of oil to it. Do the same with regard to the valve seat.

Measures for new valves

Valve stem diameter ................................................... ø9 -0.050 / -0.062

Valve guide bore ......................................................... ø9 – H7

Clearance between valve stem and valve guide ......... 0.050 – 0.077 mm

The valve stems have been specially treated and therefore they must not be ground.

009W2329-R01

C19

Replacement of valve seats

The valve seat rings should be replaced when, after repeated millings and grindings, they

have been milled so far down that the valv e heads are more than 0.3 mm belo w the face of

joint of the cylinder head (see the sketch below).

1. Remove the valve springs an d valves as indicated previously in this section.

2. Place a lead plate or an annealed copper plate between the cylinder head and a bent

chisel and knock out the valve s eat ring with this (crowbar princ iple) by sticking one

end of the chisel under the rear edge of the valve seat ring.

IT IS IMPORTANT THAT THE FILLING PIECE IS USED BETWEEN CYLINDER HEAD

AND CHISEL IN ORDER TO AVOID DAMAGING THE CYLINDER HEAD.

Before fitting new valve seat rings, clean the bores in the cylinder head for same and check

that the holes are not oval.

Then warm up the cylinder head in hot water to about 100° C (212° F), after which fit, by

means of a punch, the valve seat rings having been cooled down beforehand in nitrogen or

carbon dioxide.

When fitting the valve seat rings, the difference of temperature between cylinder head and

valve seat ring is to be 220 – 250° C (430 – 480° F).

DO NOT KNOCK IN THE VALVE SEAT RING VIOLENTLY. ONLY ACTIVATE THE

PUNCH WITH A RATHER GENTLE BLOW IN ORDER TO FIT THE VALVE SEAT RING.

009W2329-R01

C20

Cylinder head gasket

The cylinder head gasket is made from “Grafos eal” (Asbestos free) which is an expanded

graphite which is strengthened with a special 0.2 mm carbon steel inlay.

When replacing the cylinder head gasket, the grooves in the cylinder head must be

completely clean to obtain tightness.

If the cylinder head has been removed several time s, the metal around the studs may have

risen which can be checked by m eans of a straight-edge. If the me tal has risen, it must be

planned.

Drwg. 000E4789

009W2329-R01

C21

Air inlet manifold arrangement.

Pos. Part No. Qty. Beskrivelse Description Benennung

3 000E4923 1 Indsugningsmanifold Inlet manifold Einlasssammelrohr

4 008E7310 1 Luftfilter Air filter Luftfilter

5 501A2363 12 Cylinderskrue Unbraco screw Unbracoschraube

6 522E0521 12 Låseskive Locking washer Arretierungsscheibe

009W2329-R01

C22

Exhaust manifold arrangement.

Pos. Part No. Qty. Beskrivelse Description Benennung

1 000E7434 1 Vandkølet udstødningsmanifold Water-cooled exhaust manifold Wassergekühltes Auspuffsammelrohr

2 000E5028 3 Pakning for udstødningsmanifold Gasket for exhaust manifold Dichtung für Auspuffsammelrohr

3 008E9239 1 Flange Flange Flansch

4 560F1031 1 O-ring O-ring Abdichtung

5 500C2363 2 Sætskrue M8x20 Set screw M8x20 Setzschraube M8x20

6 503N2367 2 Tapskrue M8x35 Stud M8x35 Stiftschraube M8x35

7 000E5360 1 Udstødningspakning Exhaust gasket Auspuffdichtung

8 000E7788 1 Udstødningsflange Exhaust flange Auspuffflansch

9 522F1020 4 Fjederskive Spring washer Federscheibe

10 510A3208 4 Møtrik M8 Nut M8 Mutter M8

009W2329-R01

SECTION D

FLYWHEEL

009W2329-R01

CONTENTS

Removal and refitment of flywheel ............................................ page D 3

V-belt pulley fitted on flywheel ................................................... page D 3

Replacement of gear rim ........................................................... page D 4

009W2329-R01

Removal and refitment of flywheel

1. Mark the flywheel in propor tion to the crankshaft out of consideration for the other

marking of the outer diameter of the flywheel.

2. Slacken the V-belt for the charging alternat or and take it clear of the V-belt pulley of

the flywheel.

3. Remove the six bolts securing the flywheel to the crankshaft.

4. Lift off the flywheel.

Refitment is to be carried out in reverse or der. Smear the bolts with some Loctite or

something similar and tighten them with a torque of 147±7 Nm (15.0±0.7 kpm).

When dismounting the flywheel please note to fit the flywheel in the same position as before.

This only due to the timing marks on the flywheel and not due to the balance of the flywheel.

V-belt pulley fitted on flywheel.

A V-belt pulley, as indicated on the drawing below, is fitted on the front end of the flywheel.

This V-belt pulley can be replaced by thr ee “A” grooves and diam eter 125 mm for operation

of e.g. bilge pump, winch or t he like. However, only max. 10 HP must be loaded from the

front of the engine.

The V-belt pulley may be ordered against number 023D2801.

Drwg. 000E4931

009W2329-R01

Replacement of gear rim

1. Remove the flywheel.

2. Saw with a hacksaw as far int o the gear rim as possible without damaging the

flywheel.

3. Split the gear rim in the sawed slot with a chisel.

4. Clean the recess on the flywheel.

5. Heat the new gear rim gradually to about 225°C (dark blue) and fit it. Make sure at the

fitting that the gear rim lies true against th e recess and that the chamfered edge turns

towards the starter engine.

Drwg. 008E7312

009W2329-R01

SECTION E

FRONT END COVER

009W2329-R01

CONTENTS

Dismounting of front end cover .................................................. page E 3

Mounting of front end cover ....................................................... page E 3

Front rotating weight .................................................................. page E 3

Replacement of front oil seal ring .............................................. page E 4

Replacement of bushes in the front rotating weight ................... page E 4

009W2329-R01

Dismounting of front end cover

1. Dismount the flywheel (see page D3).

2. Slacken the attachment of the end cover in engine block as well as in oil sump.

3. Dismount the tightening arrangement for shaft for rotating weight.

The tightening consists of two washers of different thickness and a fibre washer

assembled by a 8 mm screw.

4. Remove the end cover considering the guide spindles of the cover.

Mounting of front end cover

The mounting is carried out in reverse order of the dismounting, i.e. the tightening arrangement for

shaft for rotating weight is to be mounted last.

Front rotating weight

The front rotating weight is mounted below the front end cover, as shown on the drawing below

and overleaf.

As will appear from the drawing overleaf the weight is marked in relation to a corresponding mark

on the gear wheel of the crank.

009W2329-R01

Replacement of front seal ring

A seal ring is mounted in the front end cover in order to avoid lubricating oil waste at the end of the

crank through the front end cover.

The seal ring can be replaced without dismounting the front end cover. It is, however, necessary to

dismount the flywheel.

Replacement of bushes in the front rotating weight

When replacing the bushes in the front rotating weight the new bushes must be calibrated with a

ball or reamed, with clearance and measures as indicated on the drawing.

009W2329-R01

SECTION G

REAR END COVER AND HAND START

009W2329-R01

CONTENTS

Rear end cover .......................................................................... page G 3

Dismounting of rear end cover .................................................. page G 3

Mounting of intermediate wheel and chain wheel ...................... page G 4

Tightening for shaft for intermediate wheel ................................ page G 4

Intermediate wheel .................................................................... page G 5

Rear of rotating weight (drawing) .............................................. page G 6

Mounting of rear of rotating weight ............................................ page G 7

Replacement of bush in the rear rotating weight

and intermediate wheel ............................................................. page G 8

Replacement of seal ring in rear end cover ............................... page G 8

Mounting of the rear end cover .................................................. page G 8

Chain adjuster ........................................................................... page G 9

Hand start .................................................................................. page G 10

009W2329-R01

Rear end cover

The rear end cover contains gear-wheel for crank, cam shaft, fuel pump,hand start,

lubricating oil pump, cooling water pump and rear rotating weight.

The gear-wheels are in the gear with each other through an intermediate wheel. The sketch

below indicates the marking of the gear-wheels which have been marked in relation to each

other so that their position to each other may easily be observed when being repared.

Dismounting of rear end cover

1. Dismount the gear from the engine.

2. Dismount the flexible coupling half on the crank.

3. Slacken the attachment of the end cover on engine block and oil sump.

4. Dismount the hand start and lower the chain into the end cover (see page G10).

5. Slacken the shaft seals for intermediate wheel and rear rotating weight and remove

the end cover.

009W2329-R01

Mounting of intermediate wheel and chain wheel

After the intermediate wheel has been placed on the shaft, and after the timing marks – as

indicated overleaf – have been adapted for the corresponding marks, the chain wheel for

hand start should be mounted on the same shaft.

The two thrust collars shown form part of the arrangement.

It is necessary – when mounting – to lubricate the

washer between block and thrust washers with

grease in order to secure that it keeps its position

during the mounting and that it does not slide down.

Tightening for shaft for intermediate wheel

The tightening consists of two washers and

a fibre ring as indicated below.

009W2329-R01

Mounting of the rear rotating weight

Mount the rotating weight on the shaft pressed into the engine block and the tooth marking in

relation to the intermediate wheel should be observed.

After the end cover has been mounted, the tightening for shaft should be mounted in

accordance with the drawing below.

The tightening consists of two washers of different thickness and a fibre ring.

009W2329-R01

Replacement of bush in the rear rotating weight and intermediate wheel

Bushes have been mounted in both rear rotating weights as well as in the intermediate wheel.

These bushes can be replaced in case of wear and tear.

After the new bushes have been pressed in these should be calibrated with a ball or be reamed

with the correct measures and clearances as indicated on the drawings on page G5 and G6 for

rear rotating weight and intermediate wheel respectively.

Replacement of seal ring in rear end cover

A seal ring is mounted in the rear end cover in order to avoid leak of lubricating oil at the outlet

of the crank through the rear end cover.

It is possible to replace the seal ring without dismounting the end cover after the gearbox with

intermediate guard has been dismounted.

Mounting of the rear end cover

The mounting is carried out in reverse order of the dismounting, as the chain for hand start is to

be mounted on the chain wheel and then to be pulled up through the hole in the end cover with

a piece of string or the like, and here the hand start is to be ready-mounted later.

009W2329-R01

Chain adjuster

The chain adjuster is mounted on two pins in the engine block.

The chain adjuster is self-adjusting and thus it does not require any adjustments in connection

with repairs in the end cover during which the chain is to be dismounted.

G10

009W2329-R01

Hand start

The chain case is bolted on to the rear end cover, as indicated on the drawing below.

When dismounting remove the covers “A”, and this results in the chain being slackened and

then the chain wheel and shaft can be taken out.

Mounting is carried out in reverse order and it should be taken care that the O-rings for oil-

tightness are correctly placed in the grooves on the chain wheel shaft.

Dismount the chain case from the end cover by removing the bolts “B”.

009W2329.XLS

SECTION H

FUEL SYSTEM

009W2329.XLS

CONTENTS:

Dismounting of the fuel pump ......................................................... page H 3

Mounting and Adjustment for fuel pump ......................................... page H 4

Specification of Numbers to Fig. 1 and 2 ........................................ page H 6

Fuel System ................................................................................... page H 7

Centrifugal Governor ...................................................................... page H 8

Function of the Centrifugal Governor .............................................. page H 9

Fuel Lift Pump ................................................................................ page H10

Fuel Filter ....................................................................................... page H11

Fuel Valve ...................................................................................... page H12

Causes and Remedies of the Fuel Pump ....................................... page H13

009W2329.XLS

Dismounting of the fuel pump

1. Dismount the bilge pump for lubricating oil from engine and gear.

2. Dismount the flange opposite of the fuel pump.

3. Take off the gear-wheel of the pump by slackening the clamping nut on the shaft of the

pump and pull off the gear-wheel.

4. Slacken the nuts in the flange of the pump and take out the pump.

REPAIRS OF THE PUMP SHOULD ONLY BE CARRIED OUT BY AUTHORIZED BOSCH

WORKSHOPS

009W2329.XLS

1. Turn piston No. 3 (rear) to TOP in the working stroke.

2. Mark the flywheel in this position in relation to the arrow mounted on the front edge of

the engine.

3. Measure 86 mm. arc measure from the TOP mark (to the right, when the flywheel faces

you).

009W2329.XLS

4. The pump should be adjusted for correct injection timing:

a. Adjust the key on the conical shaft of the pump so that it flushes with the outlet hole

B to the fuel valve for cylinder No. 3.

b. Remove the screw X and mount a dial indicator with a special sensing element

instead by means of a special holder for dial indicator.

c. Push in the dial indicator 2.0 mm.

d. Mount the flywheel for the pump loosely and turn it to the left, seen from the gear-

wheel side until the dial just indicates within the range of 0.01 mm.

5. Mount the pump on the engine by means of two nuts with washers and spring washers

so that the nuts are placed about the middle of the oblong holes in the flange of the

pump.

6. Mount the gear-wheel for the pump through the hole on the opposite side of the pump.

Fasten the gear-wheel on the conical pump shaft by means of a nut.

7. Mount the flange above the hole for mounting of the gear-wheel of the pump.

8. Mount the dial indicator again at the same place and in the same way and push it 2.0

mm in.

9. Turn the flywheel back from the 86 mm arc measure to 6 mm*) arc measure before the

TOP mark. The indicator is then to show 1.0 mm variation (1 turn).

If this is not so, fine-adjust either by moving the gear-wheel one tooth in relation to the

intermediate wheel (when indicating more than 0.7 mm) or by adjusting the placing of

the clamping nuts in the oblong holes in the flange of the pump (when indicating less

than 0.7 mm).

*) According to the Service information SI0601, the arc measure has been changed

from 6 mm. to 20 mm. from engine no. 8395.

009W2329.XLS

Specification of Numbers to Fig. 1 and 2

1. Feed pump

2. Drive shaft

3. Gear-wheel

4. Thrust washer

5. Governor shaft

6. Governor bush

7. Holder

8. Governor weight

9. Governor spring

10. Timing lever

11. Adjusting screw (idling)

12. Adjusting screw (max. r.p.m.)

13. Stop lever

14. Overflow throttle

15. Correcting lever

16. Bolt

17. Adjusting screw (full load)

18. Idle spring

19. Clamping arm

20. Starter spring

21. Starting lever

22. Delivery valve holder

23. Distributor piston

24. Governor slide

25. Fuel chamber

26. Cam disc

27. Injection timing piston

28. Roller cage

29. Lift pump

30. Fine filter

31. Pressure control valve

009W2329.XLS

Fuel System

The fuel is pumped by a lift pump (29 from the tank via a fine filter (30) to the internal wing

feed pump. This feed pump gives a constant quantity/revolution.

Through the pressure control valve (31), after the feed pump, a pressure is produced. Most

of the fuel flows through the pressure control valve back to the suction side. The remaining

part of the fuel flows through the inner chamber of the pump (fuel chamber) (25) to the high

pressure chamber of the distributor head and then it is led to cooling and bleeding and then

back to the tank through the overflow throttle (14).

The distributor piston (23) is activated by the drive shaft (2). By means of the cam disc (26)

and the rollers in the roller cage (28) the piston obtains an axial motion besides the rotary

motion.

The delivery (high pressure) takes place by means of the axial motion of the piston. The

distribution to the individual outlets (22) is through a slit in the distributor piston.

The injection stops when the governor slide (24) disengages the transversing hole in the

distributor piston. The fuel flows back into the fuel chamber of the pump (25).

The governor slide (24) is controlled by the centrifugal governor.

009W2329.XLS

The centrifugal governor is placed in the upper part of the fuel pump.

The holder (7) with gear-wheel is placed on the governor shaft (5) and is driven by the drive

shaft (2) via the gear-wheel (3) and a rubber shock absorber (vibration damper).

Four weights (8) are mounted in the centrifugal weight holder. They press on the axially

displaceable governor bush (6) via a thrust washer (4) with their pressure arms.

The governor arm group consists of starting lever (21), clamping arm (19) and correcting lever

(15). Starting lever and clamping arm are placed in the pump housing. In this way it is possible

to adjust the full load quantity by the adjusting screw (17) without influencing th adjustment of

the revolutions.

A leaf spring is placed on the starting lever (21) and it works as a starter spring. An axially

displaceable bolt (16) with idle spring (18) is placed in the upper part of the clamping arm (19).

The governor spring (9) is fixed in this bolt. The tension of the governor spring can be changed

by the timing lever (10). The starting lever (21) has a ball in the lower part connected with the

governor slide (24).

Injection Timing

On the under side of the fuel pump, at right angles in proportion to the longitudinal axis, the

spring-loaded injection timing piston (27) is. The roller cage (28) is turned influenced by the

feed pump pressure and via a mechanism. The injection timing is thus adjusted depending on

the revolutions.

009W2329.XLS

Function of the Centrifugal Governor

The revolutions of the engine are transmitted by the drive shaft (2) through gear-wheel to the

governor weights (8) and are transformed into centrifugal force there.

With stopped fuel pump, the starting lever (21) and the governor slide (24) are pressed into start

position by the starter spring (20). Through this automatic ful volume, when starting, is obtained.

When the r.p.m. of the engine goes up after start the function of the weak starter spring (20) is

taken over by the pressure from the governor bush (6). By this the starting lever (21) is pressed

against the clamping arm (19) and the starting volume is automatically declutched as the governor

slide (24) is displaced.

At low idling the governor spring (9) is not working.

The regulation is controlled by the idle spring (18).

By setting the governor spring (9) more or less with the timing lever (10) a lower or higher r.p.m.

is adjusted. The idle spring is pressed together.

The idling volume is adjusted by the adjusting screw (11) and the full load volume by the adjusting

screw (17).

Max. r.p.m. is adjusted by the adjusting screw (12).

The pump is stopped by means of a stop magnet built on to the fuel pump (not shown on the

sketch). This magnet closes the inlet port to the high pressure chamber in the distributor head at

electrical activation resulting in a dead stop magnet.

009W2329.XLS

H10

Fuel Lift Pump

The fuel lift pump is a diaphragm type and is placed at the upper side of the rear end cover.

The pump is sealed and cannot be dismantled for repair or cleaning. It is driven by the

camshaft.

Workpressure is 35 – 55 kPa.

A hand pump is fitted, which can be used for priming and bleeding by standing engine.

After priming the lever must be put in neutral position, where it is locked. If priming

not is effective, it may be caused by the driving cam being in top position. The engine must

be turned to bring the cam in bottom position.

009W2329.XLS

H11

Fuel Filter

The fuel filter used is a Bosch disposable one mounted to the port side on the front of the

engine.

The filter cannot be cleaned, but has to be changed every 300 operating hours, or if water

contamination is suspected.

Unscrew the filter casing by hand after the filter casing has been emtied for fuel via the

drain screw in the bottom of the filter casing.

Before fitting of a new filter the sealing surface of the filter casing should be cleaned. The

filter casing should now be filled with clea fuel before it is screwed on and tightened about

half a turn after the sealing surface fits tightly.

After changing the filter bleed the fuel system by actuating the manual handle on the fuel lift

pump and pump until the fuel, free from bubbles, runs out at the vent screw on the top of

the fuel filter. Tighten the screw and loosen the fuel pressure pipes at their connection on

the fuel valves and pump again with the fuel lift pump until fuel, free from bubbles, runs out

from the fuel pressure pipes.

009W2329.XLS

H12

The fuel valves are mounted in the cylinder head and are

secured here with tightening bars which are loosened when

dismounting the fuel valves.

Disassemble the fuel valves after the sketch beside and so

the nozzle can be exchanged and the pressure can be

adjusted at the washers (541).

Adjust the fuel valves by means of a pressure test apparatus

at 184 Kp/cm² *) opening pressure.

When using Bosch pressure testapparatus for nozzles you

are referred to Bosch infor-mation WPP 320/2 DK (500.8.76)

and this states test procedure and measures in detail.

The nozzle (548) is a Bosch nozzle DLLA 150P 34 combined

with a nozzle holder KBEL 78P 10/13 and this combination

makes the fuel valve (Item no. 610B9120) *).

The adjusting filling pieces for injection pressure are

obtainable from 1 mm to 1.975 mm thickness with 0.05 mm

from washer to washer.

When exchanging the nozzle the new nozzle has to be

cleaned in petrol as it has been prepared with a protective

oil. Both nozzle needle and nozzle housing should be

carefully cleaned.

When assembling the fuel valve tighten with 6 – 8 Kpm.

*) According to Service information SI0601 the fuel valve has

been changed from 610B9120 (opening pressure 184 Bar)

to 610B9250 (opening pressure 230 Bar) from engine no.

8395 and again changed according to SI1102 from

610B9250 (opening pressure 230 Bar) to 610B9220

(opening pressure 210 Bar) from engine no. 8845.

009W2329.XLS

H13

Causes and Remedies of the Fuel Pump

IJ1

009W2329-R01

SECTION IJ

PISTON, CONNECTING ROD AND CYLINDER LINER

IJ2

009W2329-R01

CONTENTS

Disassembling of pistons and connecting rods .......................... page IJ 3

Assembling of pistons and connecting rods .............................. page IJ 3

Exchange of pistons .................................................................. page IJ 4

Measurement of piston .............................................................. page IJ 5-6

Piston rings ................................................................................ page IJ 7-8

Exchange of piston rings ........................................................... page IJ 9

Exchange of piston pin bearing in connecting rod ..................... page IJ 9

Arrangement of connecting rod (drawing) ................................. page IJ 10

Connecting rod bearings ........................................................... page IJ 11

Cylinder liner ............................................................................. page IJ 12

Measuring of cylinder wear ........................................................ page IJ 12

Dismounting of cylinder liner ..................................................... page IJ 12

Mounting of cylinder liner........................................................... page IJ 12

Test measurement of cylinder liner (drawing) ............................ page IJ 13

IJ3

009W2329-R01

Disassembling of Pistons and Connecting Rods

1. Drain off the cooling water and the lubricating oil from the engine.

2. Dismount the cylinder head (see section C).

3. Remove any wear or soot edge which may be at the top of the cylinder liner with a scraper.

4. Turn the engine “upside down”.

5. Remove the oil pan.

6. Unscrew the connecting rod nuts and remove the bearing cap from the connecting rod.

7. Fit the connecting rod bolts with protective caps (soft plastic hose or the like) in order

to avoid the crank being damaged.

8. Turn the piston in top position and press out the piston and the connecting rod of the

cylinder liner. The crank must be in the exact top position.

Note! On later engines the connecting rod nuts have been replaced by unbraco

screws and therefore item 7 can be omitted.

Assembling of Pistons and Connecting Rods

1. Put a slip ring over the cylinder liner.

(The slip ring may be made from a worn out cylinder liner , of which 2/3 should be re-

moved and the remaining 1/3 should be turned weakly conical in the top end wanted.)

2. Place the crank in the top position.

3. Fit the connecting rod bolts with protective caps.

4. Lower the piston and the connecting rod down into the cylinder liner by means of the slip

ring and do observe that the piston ring gaps are staggered. It should further be checked

that the recess in the piston head is turned towards the fuel valve. Before fitting the

pistons and connecting rods lubricate the crank journals abundantly with lubricating oil.

5. Place the engine on the side or turn it “upside down”.

6. Remove the protective caps.

7. Fit the bearing cap with the bottom bearing shells.

8. Tighten the connecting rod nuts with a torque of 69 +/- 3 Nm (7 +/- 0.3 kpm). Use self-

locking nylon nuts for the connecting rod bolts and replace the nuts after each

disassembling of the connecting rod.

Note! The numbers on the connecting rod must be placed as before the disassembling

of the engine and the numbers on the connecting rod and bearing cap must fit.

The bearing cap and the connecting rod are guided by two balls which you must have

in mind when assembling.

IJ4

009W2329-R01

Exchange of Pistons

If the pistons are scored or very worn, exchange them for new ones.

This is carried out as follows:

1. Remove the pistons with connecting rods as stated on page IJ 3.

2. Take off one of the locking rings at the gudgeon pin.

3. Knock out the gudgeon pin with a punch.

4. Place the new pistons upside down. Pour a little spirit into them and light it.

The heating can also take place on a boiling plate.

5. When the piston has reached a temperature of about 100°C, smother the fire. Place the

connecting rod in the piston before the oiled gudgeon pin is pushed in.

It is recommended to cool down the gudgeon pin first, e.g. in a deep freezer or by means

of nitrogen or carbonic acid, if it is possible.

6. Relock the gudgeon pin with the locking ring.

Carefully observe that the piston is placed correctly in proportion to the numbering on the

connecting rod.

Weight of piston complete: 1,088 grams ± 7 grams.

IJ5

009W2329-R01

Measurements for Piston

IJ6

009W2329-R01

IJ7

009W2329-R01

Piston Ring 1 (Please note page IJ4)

IJ8

009W2329-R01

Piston Ring 3 (Please note page IJ4)

IJ9

009W2329-R01

Exchange of Piston Rings

The piston ring gap is 0.3 – 0.45 mm (0.0118 - 0.0177 inch) in a new engine.

The wear of the piston rings ca n be seen by measuring the piston ring gap, and the piston rings

must be changed when this is max. 2.0 mm (0.0787 inch).

This is done as follows:

1. Take out the piston with connecting rod as stated on page IJ 3.

2. Remove the piston rings either by a spec ial pair of tongs or by m eans of two piec es of

string which have been folded. With the clos ed ends around the ends of the piston rin g,

the piston ring is extended and can be lifted clear of the piston.

The mounting is carried out in the reverse order after the piston ring grooves have been

cleaned. Rotary steel brushes or a steel scrapers should not be used as cleaning tools.

Each piston has three piston rings: two compre ssion rings and one oil scraper ring as shown

on the drawing page IJ4. The upper compre ssion ring are shown on page IJ 7 the lower

compression ring is a so called M-ring and the oil scraper ring is shown on page IJ8.

Exchange of Piston Pin Bearing in connecting rod

If heavy wear of the piston pin bearing in the connecting rod is found, it may be necessary to

exchange it. Particular attention should be paid when exchanging, as the bearing must be calibrated

to correct roundness and clearance after the fitting. This is either done with a calibration ball, as

indicated on page IJ10, or with a reamer with the tolerance mentioned.

IJ10

009W2329-R01

Arrangement of Connecting Rod

IJ11

009W2329-R01

Connecting Rod Bearings

The connecting rod bearings are in two parts and consists of two steel shells in which a thin layer of

bearing metal is cast.

The connecting rod bearings must be exchanged if they are scratched or if the “red” layer between

the bearing metal and the steel shell can be seen faintly.

When grinding the crank journal, connecting rod bearings can be supplied in following undersize:

0.6 mm (0.02362inch) (see section L).

IJ12

009W2329-R01

Cylinder liner

The bore of the cylinder liner is 85.000 – 85.020 mm (3.3464 – 3.3472 inch). The cylinder liner must

be exchanged when it is worn max. 0.3 mm (0.012 inch).

Measuring of Cylinder Wear

Place a new piston ring in the upper end of the liner where this is not worn. Measure the piston ring

gap with a feeler gauge. This will be e.g. 0.3 mm (0.012 inch). Place the piston ring lower in the liner

where it is worn and measure the piston ring gap again which is now e.g. 0.9 mm (0.0354 inch).

The wear of the liner is then (0.9 – 0.3) / 3 = 0.2 mm. That is: Largest measure less smallest measure

divided by 3 (approximate value for ¶).

The cylinder liner can also be measured with a cylinder template gauge.

Dismounting of Cylinder Liner

1. Remove the cylinder head (see section C page 7).

2. Take out the pistons (see page IJ 3).

3. Cover the connecting rod journals with a piece of oil paper or plastic.

4. Pull out the cylinder liners with a special tool or place the engine block on the side and knock out

the cylinder liners carefully with a wooden block as filling piece. Knock the liners from the bottom

and upwards.

Mounting of Cylinder Liner

There is no gasket between cylinder liner and the engine block at the top. The joint faces must

therefore be completely clean and without burrs. Grind with abrasive compound, if required.

The rubber rings of the lower edge of the cylinder liner must be renewed at each disassembly and

they must not be twisted when mounting.

The rubber rings and the collar may be supplied with a thin coat of jointing paste at the mounting.

When the above things are in order put back the cylinder liner in the engine block – by means of a

wooden block.

After the mounting you must check the clearance of the liner above the engine block. This clearance

must be 0.10 – 0.20 mm (0.0039 – 0.0079 inch).

IJ13

009W2329-R01

Test Measurements of Cylinder Liner

009W2329-R01

SECTION L

CRANKCASE, CRANKSHAFT,

MAIN BEARINGS AND OIL SUMP

009W2329-R01

CONTENTS

Dismounting of crankshaft ......................................................... page L 3

Change of main bearings .......................................................... page L 3

Rear part of crank ...................................................................... page L 4

Rear gear-wheel and rear part of crank ..................................... page L 5

Marking of front gear-wheel on crank ........................................ page L 6

Front part of crank ..................................................................... page L 7

Repair dimensions of crakshaft ................................................. page L 8

Connecting rod journals ............................................................ page L 8

Main bearing journals ................................................................ page L 8

Main bearings ............................................................................ page L 8

Oil sump .................................................................................... page L 9

009W2329-R01

Dismounting of crankshaft

1. Remove the cylinder head with manifold (see section C page 4).

2. Dismount the flywheel (see section D page 3).

3. Dismount the gear (see section R page 3).

4. Dismount the rear end cover (see section G page 3).

5. Turn the engine upside down.

6. Remove the oil sump.

7. Dismount the pistons and the connecting rods (see section IJ page 3).

8. Dismount the front end cover (see section E page 3).

9. Remove the bearing caps and lift out the crank.

The mounting of the crankshaft takes place in reverse order, the bearing caps being fastened

at a torque of 12 kpm (86.8 ft.lbf). Further make sure that the two thrust collars are correctly

fitted in accordance with the drawing below.

Change of main bearings

Proceed in the same way as when dismounting the crankshaft.

As will appear from the drawing below, the caps are stamped in proportion to corresponding

part of the engine block. Observe this marking when disassembling.

009W2329-R01

Rear part of crank

The drawing below shows the rear part of the crank with screwing-on of the counter weights of

the crankshaft.

Drwg. No. 008E4757

009W2329-R01

Rear gear-wheel and rear part of crank

009W2329-R01

Marking of front gear-wheel on crank

The front gear-wheel on the crank drives the front rotating weight and is marked in proportion to

this and in accordance with the drawing below.

The gear-wheel has been shrinked on the shaft. When shrinking on a new gear-wheel there

should be a difference of temperature between the crankshaft and the gear-wheel of 231 C.

Further see the drawing overleaf.

009W2329-R01

Front part of crank

009W2329-R01

Repair dimensions of crankshaft

The crankshaft is made of drop-forged, heat-treated steel. Thus it is possible to gring the

crankshaft without subsequent surface treatment.

The crankshaft must never be repaired with hard chromium-plate or metal feeding, but only by

grinding in accordance with the below mentioned measures and tolerances to which we supply

undersize bearings.

The crankshaft should be ground, if it is oval and the smallest diameter is 0.05 mm (0.002 inch)

below the diameter it had when leaving the factory.

Connecting rod journals

Standard .................................................................. 53.987 – 54.000 mm (2.1255 – 2.1260”)

0.6 mm undersize .................................................... 53.387 – 53.400 mm (2.1019 – 2.1024”)

Clearance between bearing and journal…………..…..0.028 – 0.068 mm (0.0011 – 0.0027”)

Main bearing journals

Standard .................................................................. 61.981 – 62.000 mm (2.4402 – 2.4409”)

0.6 mm undersize .................................................... 61.381 – 61.400 mm (2.4166 – 2.4173”)

Clearance between bearing and journal .................. ..0.048 – 0.112 mm (0.0019 – 0.0044”)

Main bearings

The engine is fitted with four two-piece main bearings as shown on the drawing below.

The bearings must be changed when the “red” layer under the bearing metal can be seen

faintly, or if the bearings are much scratched.

Bearing shell: C10 2.1 mm thick

Bearing material: tin aluminium with net structure

External surface: tinned 0.001 mm thick

009W2329-R01

Oil Sump

The engine is fitted with an oil sump of cast iron. The oil sump is fixed to the crankcase and is

ensured correct position to this by means of guide pins.

Under the oil sump the suction strainer for the lubricating oil system is placed and pipe

connections for it.

The oil sump with pipe arrangement for lubricating oil system is shown on the drawing below.

009W2329-R01

SECTION M

CAMSHAFT, COMPLETE

009W2329-R01

CONTENTS

Camshaft ................................................................................... page M 3

Valve timings ............................................................................. page M 4

Guide for push rod ..................................................................... page M 4

Gear-wheel of camshaft ............................................................ page M 5

Drawing of push rod .................................................................. page M 6

Drawing of push rod guide ......................................................... page M 7

009W2329-R01

Camshaft

The camshaft runs in borings in the engine block, and it has been forced-lubricated through

grooves bored in the engine block.

A bush for the camshaft is fitted in the front end of the engine block. There is a hole for lubricating

oil inlets in this bush.

The camshaft is fixed on to the engine block at the flange “A” on the sketch below.

The cams which are casted together with the camshaft are made of hardened steel.

The camshaft is driven via a gear-wheel from the crankshaft.

When dismantling the camshaft remove gear and rear end cover as stated in sections R and G.

Then loosen the camshaft at the flange “A” on the sketch below and take it out.

009W2329-R01

Valve timings and injection point

Flywheel diameter ........................................... 370 mm

Inlet valve opens ......................... before TDC: 32° (arc measure: 103 mm (4.07”))

Inlet valve closes ......................... after BDC: 64° (arc measure: 207 mm (8.14”))

Exhaust valve opens ................... before BDC: 64° (arc measure: 207 mm (8.14”))

Exhaust valve closes ................... after TDC: 32° (arc measure: 103 mm (4.07”))

Injection starts ............................ before TDC: 6.2° (arc measure 20 mm (0.79”))

Valve clearances (cold engine) .. inlet: 0.30 mm (0.01180”)

exhaust: 0.30 mm (0.01180”)

Guide for push rod

On the picture below the guide for push rod is shown in position “B”.

When removing the camshaft the guide for push rod should be kept up in its pilot hole in the

engine block by means of grease or by means of magnets.

The guides for push rod may be fitted from under side or from top side of the engine block.

009W2329-R01

Gear-wheeI of camshaft

The camshaft gear-wheel is equipped with a single mark for its correct position in relation to

the rear rotating weight and a double mark in relation to intermediate wheel (see instructions

in section G page 3).

009W2329-R01

Drawing of pushrod

Drwg. No. 000E9455

009W2329-R01

Drawing of push rod guide

009W2329-R01

SECTION N

LUBRICATING OIL SYSTEM

009W2329-R01

CONTENTS

Lubricating oil system ................................................................ page N 3

Pressure relief valve .................................................................. page N 3

Fitting of dip stick ....................................................................... page N 4

Pipe connections in oil sump ..................................................... page N 5

Lubricating oil pump .................................................................. page N 6

Removal of lubricating oil pump ................................................ page N 6

Lubricating oil cooler ................................................................. page N 7

Removal of lubricating oil cooler ................................................ page N 7

Change and quality of lubricating oil .......................................... page N 8

Lubricating oil filter .................................................................... page N 9

009W2329-R01

Lubricating oil system

The engine is lubricated through a pressure l ubrication system. The lubricating pump driven

by the camshaft sucks oil from the oil sump th rough a strainer. From the lubricating pump

the oil is pressed through a fine filter to the respective lubr icating points through oil ducts

bored in the goods. A reduction valve in the lubric ating system secures that the oil pres sure

is kept between 2.0 and 4.0 Bar at hot engine and max. revolutions.

Pressure relief valve

The pressure relief valve is fitted on the front of the engine in bore in the engine block in vertical

position in the same side as the lubricating oil filter. The valve is built up as shown on the drawing

below, and the purpose of this valve is to reduce the lubricating oil pressure to 2-4 Bar before this

goes out into the system.

Min. lubricating oil pressure at idling and with warm engine is 1.0 Bar.

The lubricating oil pressure can be adjusted by means of intermediate washers as shown on the

drawing.

Removal of washers gives lower lubricating oil pressure.

Dirt in the pressure relief valve may result in a low lubricating oil pressure and thus the piston

000E5035 should be taken out and cleaned if necessary.

009W2329-R01

Fitting of dip stick

009W2329-R01

Pipe connections in oil sump

009W2329-R01

Lubricating oil pump

The lubricating oil pump is placed below the rear end cover and actuated via the rear gear-wheel

of the crank and a gear-wheel fixed to the shaft of the pump.

The pump is an Eaton pump with star rotor and life ring.

When the engine runs at full speed, the pump runs 4000 r.p.m. and thus supplies 33.15 litres

lubricating oil per minute to the lubricating oil system.

Removal of lubricating oil pump

1. Remove the gear (see section R page 8).

2. Remove the rear end cover (see section G page 3).

3. Loosen the three fixing bolts of the lub. oil pump frfom the engine block.

4. Pull the free lub. oil pump from the pipe connections in the oil sump and lift it clear.

5. Loosen the bolts on the front cover of the lub. oil pump and then it can be dismantled.

009W2329-R01

Lubricating oil cooler

The standard engine is equipped with a lubricating oil cooler, fitted as shown on the drawing below.

On the water side the cooler is connected between the cooling water pump and the cooling water

suction hose, and on the oil side it is connected to the outlet of the lubricating oil pump to the

lubricating oil system.

The end pieces “A” of the cooler consists of two profile-cast rubber tubes fastened to the cooler and

the cooling water pipes with clips “B”. The cooler “C” consists of a nest of pipes through which the

cooling water passes, whereas the lubricating oil runs round the pipes.

As the lubricating oil pressure is higher than the cooling water pressure, the cooler should be

examined by pressure testing and inspected for corrosions in case of loss of lubricating oil without

external visible leaks.

Removal of lubricating oil cooler

1. Remove the lub. oil pipes “D” and “E”..

2. Loosen the cooler from its attachment to the engine block.

3. Loosen the clips “B” on the inlet and outlet water pipes of the oil cooler.

4. Take off the cooler and dismantle it further by removing the profile-cast end pieces

fastened by clips.

009W2329-R01

Change and quality of lubricating oil

Exchange the lub. oil every 150 operating hours or once a year.

This is done with a bilge pump, fitted on the engine. This pump can be set for emptying the

engine or gearbox of lub. oil by means of the three-way cock.

Lub. oil content inclusive of filter is 4.9 Litres.

Pour fresh oil through the filling hole in the top cover.

Normally a lubricating oil quality mark “Service CC” must be used, but for operation under

difficult conditions, i.e. frequent cold starting, short working periods, very varying load,

quality marked “Service CD” must be used.

Besides, quality marked “Service CD” must be used if the sulphur content of the fuel is

higher than 1 per cent.

The chosen viscosity of oil depends on the air temperature at the engine.

In air temperatures at the engine below 5°C viscosity SAE 10 is used or 5W/30 multigrade.

In air temperatures at the engine between 5°C and 25°C viscosity SAE 20 is used or

10W/30 multigrade.

In air temperatures at the engine above 25°C viscosity SAE 30 is used or 15W/40 multigrade.

As many lubricating oils today are multigrade the above should be used as a guidance for

choosing an oil with the correct spectrum of viscosity.

For lifeboat engines where cold start is required down to minus 15°C within 2 minutes

MOBIL OIL NO 1 or similar must be used for the engine as well as for the gearbox.

009W2329-R01

Lubricating oil filter

The lubricating oil filter is a disposable one which cannot be cleaned.

Exchange the filter every 150 operating hours or once a year.

Remove the filter by hand and discard it.

Tighten the new filter by hand too.

When changing the filter clean the sealing surface on the engine block, if necessary, and

lubricate the rubber gasket of the filter with a little clean oil.

After changing the filter start up and check that the filter and the sealing surface towards the

engine are tight.

A difference valve is fitted in the filter, and this valve shuts out the lubricating oil from the filter so

that the oil is not cleaned any longer if the difference pressure is getting too high over the filter.

Various makes of oil filters can be used as e.g. the motor-car industry uses the filter type used,

as standard.

The BUKH filter used is of make Mann & Hummel type W9.30.

009W2329-R01

SECTION O

COOLING WATER SYSTEM

009W2329-R01

CONTENTS

Cooling water systems .............................................................. page O 3

Johnson cooling-water pump type F5B9 ................................... page O 4

Removal of pump ...................................................................... page O 4

Dismantling of pump .................................................................. page O 4

Dismantling of intermediate housing ......................................... page O 4

Reassembly of pump ................................................................. page O 5

Refitment of pump ..................................................................... page O 5

Circulation pump for freshwater ................................................. page O 6

Removal of pump ...................................................................... page O 6

Dismantling of pump .................................................................. page O 6

Reassembly of pump ................................................................. page O 6

Circulation pump ....................................................................... page O 7

Zinc rod protection ..................................................................... page O 8

Thermostate .............................................................................. page O 9

Header tank and heat exchanger .............................................. page O 10

Dismantling of heat exchanger .................................................. page O 10

Filling up of anti freeze solution ................................................. page O 10

Keel cooler arrangement ........................................................... page O 12

009W2329-R01

The engine can be c ooled by direct seawater cooling which is supplied as standard cooling

system. Alternatively freshwater cooling can be supplied as extra equipment and this c an be

arranged in three different ways: either with heat exchanger, keel cooler or with radiator

cooling. However, the latter will n ot be of i mmediate importance when using the engine as

marine engine and therefore it is not dealt with separately in this section.

Generally the basic design of engine as a marine engine does that indirect cooling will not be

benefitial unless the engine is us ed for more than 500 hours of r unning per year. However

other circumstances like use in proluted rive r and narrow waters can do that i.e. a keel

cooling system is recommended. Keel cooling is always used for Lifebo at Engines due to

SOLAS requirements.

In case of direct seawater cooling the seawater is drawn through the external strainer and the

lubricating oil cooler to the cooling water pump (Johnson type F5B9) from where the water is fed

through the cooling jackets of the engine before it – via the thermostate – is lead overboard

through the exhaust system.

In case of freshwater cooling with heat exchanger the engine is cooled by the freshwater which is

circulating in a closed system. The freshwater is cooled in the heat exchanger by seawater. With

freshwater cooling with heat exchanger it is necessary – out of considerationfor the capacity of the

seawater pump – to equip the exhaust system with a by-pass hose, as stated in section Y,

pages 8 and 9.

In case of freshwater cooling with keel cooler the freshwater also circulates in a closed system.

The freshwater is cooled by the freshwater cooling pipes being led out somewhere through the

bottom of the boat and fitted on the outside of the hull. Thus the pipes are cooled by the seawater.

The seawater is always circulated by a Johnson pump type F5B9, whereas the freshwater is

always circulated by a circulation pump with metal rotor. The Johnson pump must never be used

for circulating the freshwater as the temperature can be considerably higher when using freshwater

cooling than in case of seawater cooling. This causes braking down of and damage to the impeller

of the Johnson pump, the impeller being made from neoprene.

The advantages of freshwater cooling are:

A higher operating temperature can be reached, having the effect that the running parts of the

engine will be less worn.

The engine has a somewhat better economy.

The engine block is not exposed to the corrosive actions of the seawater.

It is possible to add an anti-freeze solution to the freshwater in winter periods where you want to

use the engine.

The reason why the engine is not run at a higher temperature when seawater cooled is that the

salt in the seawater starts crystallizing at 70°C and this salt will settle in the engine block round the

cylinder liners and result in bad heat conduction and corrosions.

009W2329-R01

Johnson cooling water pump type F5B9

The cooling water pump is used for direct s eawater cooling with a cam height 0f 2.0 mm and

for freshwater cooling with heat exchanger to the seawater si de with a cam height of 3.1 mm

(see technical data page A5).

Removal of the pump

1. Loosen the three screws in the flange marked A.

2. Remove the cooling water pipes going to and from the pump.

3. Lift the pump free in one piece from its attachment in the engine block.

Dismantling of the pump

1. Loosen the three screws marked B in the front cover of the pump and remove the

front cover.

2. Withdraw the neoprene impeller which is fitted on a multiple spline shaft.

3. The cam determining the characteristic of the pump can be exchanged now by

loosening the screw marked C.

4. Take out the washer and locking ring behind the impeller. Then loosen the bolt D in

the mounting flange.

5. Press the pump free of the cast intermediate housing (610G0250) with two

screwdrivers in the gap E. Take out the carbon ring stuffing box in the pump.

Dismantling of the intermediate housing

1. Proceed as when dismantling the pump.

2. Pull out the gear-wheel F with a special tool. The gear-wheel is shrinked onto the shaft

and secured by a drilled-in tube pin. When fitting a new gear-wheel the diference of

temperature should be in accordance with the drawing overleaf. Bore in thethe tube

pin after fitting of the gear-wheel.

3. Remove the locking ring marked G.

4. Knock out the shaft with ball bearings facing the gear-wheel side with a punch or a

wooden block as intermediate piece. Now the ball bearings and the seal ring in the

bottom of the intermediate housing can be exchanged.

009W2329-R01

Reassembly of pump

The pump should be assembled in the reverse order of the dismantling. Observe that the ball

bearings of the intermediate housing are filled with grease free from acid.

Refitment of the pump

Fit the pump in the reverse order of the removal and check that the rubber gasket ring

marked H fits tightly.

009W2329-R01

O5A

Johnson cooling water pump:

After DV36 serial No. 1051 the outer dimensi ons of the Johnson cooling water pump have

been changed and the pump has been par tly simplified at the same ti me, as e.g. the carbon

ring stuffing box has been left out.

The type and the technical data of the pum p and height of the cam in ca se of direct seawater

cooling and indirect freshwater cooling respectively are the same for the new pump as for the

one previously used. Further the impeller is the same as t hat used on the previous pu mp. The

new pump can be used by excha nging the previous one if the pipe connections are changed

too.

1. Pump housing 11. Washer

2. Pump shaft 12. Screw

3. Pump cover 13. Screw for cam

4. Gasket 14. Key/pin

5. Adjusting cam 15. Locking ring

6. Impeller 16. Ball bearing

7. Neoprene washer 17. Sealing ring

8. Wear washer 18. O-ring

9. Pin 19. O-ring gasket

10. Distance ring 20. Pump flange

009W2329-R01

O5B

Removal of the pump

4. Loosen the three screws in the flange marked 20.

5. Remove the cooling water pipes going to and from the pump.

6. Lift the pump free in one piece from its attachment in the engine block.

Dismantling of the pump

5. Loosen the three screws marked 12 in the front cover and remove the front cover

marked 3.

6. Withdraw the neoprene impeller which is mounted on a multiple spline shaft.

7. The cam marked 5 determining the characteristic of the pump can be exchanged now

by loosening the screw marked 13.

8. Remove the wear washer marked 8.

9. Remove the locking ring marked 15.

10. Press out the pump shaft marked 2 of the pump housing with ball bearings marked 16

and gear-wheel.

11. Now the sealing rings marked 17 and the O-ring marked 18 and the washer marked

11 can be exchanged/removed.

Dismantling and reassembly of gear-wheel

For operation of the pump a gear-wheel ha s been shrinked ont o the pump shaft. The gear-

wheel is secured by key and tongue.

The gear-wheel can be pulled off the shaft by means of a special tool.

When fitting a gear-wheel there s hould be a difference of temper ature between the shaft and

gear-wheel of 236°C.

Reassembly of pump

The pump is assembled in the reverse order of the dismantling.

Refitment of the pump

To be carried out in the reverse order of the dismantling and it should be checked that the

rubber ring marked 19 fits tightly aga inst the be aring surface of the flange marked 20.

009W2329-R01

Circulation pump for freshwater

The circulation pump shown on page O7 is used for freshwater cooling, both when cooled by

heat exchanger and by keel cooling.

Removal of circulation pump

1. Remove the inlet and outlet pipes from the pump.

2. Loosen the pump from its fixing on the rear end cover and lift it out.

Dismantling of circulation pump

1. Loosen the screws 500C2363 in the cover 000E4934 of the pump and remove the

cover and gasket 560K1119.

2. Pull out the circulation wheel 000E4933 with a special tool and now the washer

530Q9973 and the stuffing box 530Q9972 can be changed. The flexible stuffing box

cannot be repaired but has to be exchanged, if the contact face shows signs of

scratches or fractures.

3. Remove the locking ring 522A0042.

4. Take out the washer 522A9022.

5. Press out the shaft 000E5283 towards the open side. Now the individual ball bearings

and the seal ring 561B0201 can be changed.

Reassembly of circulation pump

Assemble the pump in the reverse order of the dismantling.

Fill the ball bearings with grease free from acid.

When assembling and fitting the circulating pump there must only be used original gaskets.

The plug in the bottom of the pump is intended for draining off the water in the pump and the

pipes in case of periods of frost.

The pump is driven through connection with the shaft end from the Johnson pump.

009W2329-R01

Circulation pump

009W2329-R01

Zinc rod protection

For seawater-cooled engines it is necessary to fit zinc anodes in the cooling water system in

order to protect against corrosion of the engine block.

On the starboard side of the engine under the exhaust manifold there therefore are three

mounting holes for zinc anodes. As standard for seawater cooling zinc anodes have been

screwed into the two back holes as shown on the drawing below. There is no zinc anode in the

third hole as – due to the placing of the starter – there is no easy access to this plug during the

day-to-day running.

Change the zinc anodes as according to requirements which are influenced by the water in

which you are normally sailing. Usually it will be necessary to change the zinc anodes once a

year just before the first spring sail.

009W2329-R01

Thermostate

For controlling the cooling water temperature the cooling water system is fitted with a

thermostate.

Dependent on the cooling principle the thermostate has different opening temperatures.

In case of direct seawater cooling the thermostate has an opening temperature of 50°C.

In case of freshwater cooling the thermostate has an opening temperature of 80°C.

In case of freshwater cooling with keel cooler the thermostate has an opening temperature

of 80°C.

Direct seawater cooling thermostate No. 008E6587.

Freshwater cooling with heat exchanger thermostate No. 033D1202.

Freshwater cooling with keel cooler thermostate No. 030G6601.

In all three cases the thermostate is placed at the exhaust manifold astern in starboard side of

the engine.

009W2329-R01

O10

Header tank and heat exchanger

The arrangement of header tank and heat exchanger fitted on the top of the water cooled

exhaust manifold is shown on page O11.

In case of keel cooling the arrangement only serves as header tank and from the factory it has

been prepared for this by changes in proportion to the use as heat exchanger/ header tank,

and directly it will not be possible to change the function from keel cooling into heat exchanger

cooling without buying a new header tank or heat exchanger/header tank prepared for the

purpose.

Dismantling of heat exchanger

In order to clean the heat exchanger element or in order to test it for pressure, remove the

profile-cast rubber tubes on the inlet and outlet side of the seawater connection and take out

the element.

Further, exchange the element in case of corrosion or leaks, as it can not be recommended to

plug leaky pipes because of reduced heat conductivity.

Filling of anti-freeze solution

If you want to continue to use the boat in periods of frost pour water/anti-freeze solution

through the cap of the header tank, depending on what temperature you want protection

against.

Before doing so drain off the freshwater from the engine through the drain plug in the

crankcase and through the drain plug of the circulation pump.

009W2329-R01

O11

009W2329-R01

O12

009W2329-R01

SECTION P

ELECTRICAL SYSTEM

009W2329-R01

CONTENTS

Wiring diagram (key switch) ...................................................... page P 3

Wiring diagram (key switch) – 2 battery starting system............ page P 4

Wiring diagram (push button) .................................................... page P 5

Wiring diagram (push button) – 2 battery starting system ......... page P 6

Generator with double charging diodes ..................................... page P 7

Key switch start panel ............................................................... page P 8

Push button start panel ............................................................. page P 9

Instrument panel ........................................................................ page P 10

009W2329-R01

Generator with double charging diodes

Drg.no. 009V0053

009W2329-R01

P10

009W2329-R01

SECTION R

ZF GEAR – BW7

009W2295

CONTENTS

Gear ratio .................................................................................. page R 3

Oil change ................................................................................. page R 3

Special tools .............................................................................. page R 5

Adjusting measures and torques for BW7 ................................. page R 6

General information for work with the gear ................................ page R 8

Removal of gear from engine .................................................... page R 8

Dismantling of BW7 gear ........................................................... page R 9

Removal of input and output shafts ........................................... page R 11

Dismantling of shifting fork ........................................................ page R 12

Dismantling of output shaft ........................................................ page R 12

Dismantling of input shaft .......................................................... page R 14

Dismantling of lower gearbox part ............................................. page R 14

Dismantling of upper gearbox part ............................................ page R 14

Refitment of BW7 gear .............................................................. page R 15

Fitting of input shaft ................................................................... page R 20

Measuring of tightening and tapered roller bearing on input

and output shafts with measuring gauge ................................... page R 21

Measuring of tightening and tapered roller bearing on input

and output shafts without measuring gauge .............................. page R 23

Premounting of shifting fork ....................................................... page R 24

Fitting of bolts in gearbox .......................................................... page R 26

Fitting of input and output shafts with shifting fork in gearbox ... page R 27

Fitting of shaft seal rings............................................................ page R 30

Supplement to fitting of shaft seal rings ..................................... page R 31

009W2329-R01

Gear Ratio

The BW7 gear which is used on DV36 has normally a reduction ratio of 3.0:1 for AHEAD and

2.36:1 for REVERSE.

For special purposes it can be delivered with a reduction ratio of 2.47:1 for AHEAD and

2.36:1 for REVERSE.

Oil Change

The gear will need no other attendance than regular change of oil. This to be carried out after

the first 25 hours of operation and then every 150 hours or once a year.

The oil change is carried out by means of the hand bilge pump which is delivered together with

the tools for the engine.

Refill fresh oil to the quantity of 1.1 litres.

Quality of lubricating oil marked Service CC or CD with a viscosity of SAE 30 or SAE15W-40

is used. Oils covering more viscosity numbers must not be used.

009W2229

009W2329-R01

Special Tools

Order No. 009P3187

Mounting punch for seal ring 25x33x6 at input shaft

Order No. 009P3188

Internal puller for tapered roller bearings / outer ring

Order No. 009P3189

For fitting of tapered roller bearings / outer ring in

connection with 009P3188

Order No. 009P3190

Measuring instrument for adjustment of tapered roller

bearings

Order No. 009P3191

Protective sleeve for seal ring 25x33x6 at input shaft

Order No. 009P3192

Mounting punch for seal ring 32x45x7 at output shaft

Order No. 009P3193

Bush for stiffening of disc springs “AHEAD”

Order No. 009P3193

Bush for stiffening of disc springs “ASTERN”

009W2229

Adjusting Measures and Torques for BW7

Designition

Statement of

dimensions

Gauge

Remarks

Axial tightening of tapered

roller bearings on input

and output shafts

0.03 – 0.08 mm

With a load of

30 N (3 Kp)

Dial indicator

Depth

micrometer

Adjusted by means of washer (s)

under bearing outer ring in the

housing.

The bearings are fitted with

Loctite 601

Axial clearance

Sliding sleeve in

shifting fork

0.1 – 0.4 mm

Feeler gauge

New gear

Axial clearance

Sliding sleeve in

shifting fork incl.

permissible wear

Max. 0.8 mm

Feeler gauge

Clearance + wear limit

Axial clearance

“AHEAD” and “ASTERN”

wheels

0.1 – 0.4 mm

Depth

measure

“AHEAD”: Clearance appears

when fitting and is examined

at control.

“ASTERN”: Clearance can be

Adjusted by means of a thrust

washer

Disc / plate clearance

per disc clutch

0.9 – 1.0 mm

Feeler gauge

To be measured two places

opposite one another.

To be adjusted by washer

Disc / plate clearance

per disc clutch with max.

wear

1.5 mm

Feeler gauge

To be measured two places

opposite one another.

To be adjusted by washer

Tightening of disc springs

Min. 1.1 mm

Depth

measure

Measured on disc springs

when slack on the output shaft

Testing indication for

pressure

spring 0732 041 225 in

star bolts

L = 15.5 mm

P = 38.9±2.4 N

(3.89±0.24 Kp)

Depth

measure

Weight

L = length of loaded spring

P = spring power

009W2329-R01

Adjusting Measures and Torques for BW7

Designition

Statement of

dimensions

Gauge

Remarks

Testing indication for

pressure spring 0732 041

008 for shift pins

L = 11.4 mm

P = 46±5 N

(4.6±0.5 Kp)

Depth

measure

Weight

L = length of loaded spring

P = spring power

Torque of hexagon nut

M20x1.5 on output shaft

on the output side

100 Nm

(10 Kpm)

Torque

wrench

Secure after having packed with

liquid jointing on the contact face

Torque of hexagon nut

M20x1.5 on output shaft

on the input side

100 Nm

(10 Kpm)

Torque

wrench

Secure after tightening

Torque of hexagon nut

M20x1.5 on the gear-

wheel bolts

50 Nm

(5 Kpm)

Torque

wrench

Secure after having packed with

liquid jointing on the contact face

Torque of M8 screws in the

halves of the gearbox

17 Nm

(1.7 Kpm)

Torque

wrench

Add U-washers

Torque of M8x25 screws at

the gear wheel bolts

17 Nm

(1.7 Kpm)

Torque

wrench

Secure with Loctite 241

Torque of vent valve

10 Nm

(1.0 Kpm)

Depth

measure

Seal ring for input shaft:

Depth of compression

Binding with

surface of

casting of half of

gearbox

Ruler

Shaft seal rings inserted

with sealing compound

(unhardening)

Output shaft seal ring

Depth of compression

Measured from front

of output shaft to front

of shaft seal ring

22.5±0.5 mm

Depth

measure

Shaft seal ring inserted

with sealing compound

(unhardening)

009W2229

General Information for Work with the Gear

Show cleanliness when repairing the gear and before the gear is opened it must be

carefully cleaned.

Use special tools as stated earlier in this section when removing and fitting the gear.

The seal face between the two parts of the housing is tightened with liquid jointing.

When dismantling the halves of the gearbox from each other, loosen the screws in the

flanged joint first and push/press back the fitting pins.

Press the two halves of the gearbox from each other by means of two rods or the like.

Do not use chisels.

Use special tools for loosening parts fixed to the shafts such as bearings, gear-wheels etc.

When assembling the gear and fitting the bearings it is necessary to heat the cylinder

bearings in oil bath before fitting them. The temperature must not exceed 120°C.

When fitting the bearing outer rings the housing should be heated and the bearing outer

rings should be fitted with Loctite.

Removal of Gear from Engine

Before the gear can be dismantled it must be removed from the engine:

1. Loosen the propeller shaft flange and push the propeller shaft a little backwards.

2. Loosen the gear from the engine by removing the bolts of the intermediate flange

between the engine and gear.

3. Lift clear the gear of the engine.

4. Dismantle the flexible coupling by loosening the central nut and pulling off the

coupling half from the input shaft of the gear with special tool No. T 41069.

009W2329-R01

Dismantling of BW7 Gear

Pull the dip stick of the housing.

Remove the locking ring on the input shaft.

Remove the shifting arrangement with gasket.

There are two different shifting levers which,

however, can be built in without any problems

in either cases.

Press the shifting lever out of the shifter shaft

and take out the O-ring 12x2.4 and the pin and

the pressure spring.

Before the shifting lever is pressed out it should

be marked in proportion to the shaft out of con-

sideration for the later assembling of the

arrangement.

1. Shifter shaft

2. Pin

3. Pressure spring

4. Shifting housing

5. O-ring

6. Shifting lever

7. Grease lubricating

8. Screw cap

R10

009W2229

Unscrew the nut of the output shaft flange.

Pull off the output shaft flange.

Screw off the fixing screws which hold

the halves of the gearbox together.

R11

009W2329-R01

Drive back the fitting pins 2 – 3 mm in the

gearbox and lift one gearbox half with reversing

shaft, input and output shafts free of the other

gearbox half.

Protective sleeve 1 x 56 136 992 may be

fitted on the input shaft before the dismantling.

Removal of Input and Output Shaft

ProTake out the screws M8x25 and the gear-

wheel bolts and remove the washer plate.

At the fitting the screws have been smeared with

Loctite and consequently it may be necessary to

heat before they are loosened.

Loctite No. 241 has been used.

Lift the complete arrangement with input and

output shafts and shifting fork out of the housing.

Now the arrangement can be lifted free of each

other.

1. Input shaft

2. Wheel “ASTERN”

3. Wheel “AHEAD”

R12

009W2229

Dismantling of Shifting Fork

Screw out the pin M6x12 of the shifting fork and

press out the reversing shaft of the shifting fork.

At the fitting the threaded pin has been smeared

with Loctite No. 241 and so it may be necessary

to heat.

1. Shifting fork

2. Threaded pin

3. Reversing shaft

Dismantling of Output Shaft

Remove nut with washer “ASTERN”

Pull off the wheel “ASTERN” with a special tool

and take up washer, disc springs and tapered

roller bearing inner collar.

R13

009W2329-R01

Remove the thrust collar wuth bolts and

washers together wuth needle bearing

bushing, sliding sleeve and pressure spring.

Remove the wheel “AHEAD” with a special tool

and take off all parts “AHEAD”.

R14

009W2229

Dismantling of Input Shaft

Squeeze off the tapered roller bearing

inner collar.

Dismantling of Lower Gearbox Half

Pull out the tapered roller bearing outer collars

of the lower gearbox with an inner puller

No. 1 x 56 122 208 and auxiliary tool

No. 1 x 56 122 227 and take up the washers.

At the fitting the tapered roller bearing outer

collars have been smeared with Loctite 601

and so heating may be necessary.

At the dismantling: Mark the adjusting washer(s)

which lie below the bearing rings in proportion to

the bore.

Dismantling of Upper Gearbox Half

Pull off the tapered roller bearings outer collars

as described under picture No. 16 above.

Loosen the nuts at the wheel and press out the

bolt of the housing.

Remove slotted pin and washer.

R15

009W2329-R01

Refitment of BW7 Gear

Before refitment of the gear examine the

different components for cracks and wear.

In the following description only the fitting of

output shaft for “AHEAD” is described as the

fitting for “ASTERN” is chiefly corresponding.

If it is necessary reference will be made to the

paragraph marked “Note”.

Picture 19

Insert the sliding sleeve in the shifting fork and

measure the axial clearance of the sliding

sleeve.

The axial clearance below the wear limit must

be 0.1 – 0.4 mm.

Picture 20

Insert the locking bolt in the thrust collar. The

locking bolt should be able to turn easily in its

bore in the thrust collar.

The head of the locking bolt must adjoin the

thrust collar.

Picture 21

Insert thrust collar with locking bolt in sliding

sleeve.

Check torsion in sliding sleeve.

The locking bolts must not pinch by this.

R16

009W2229

Fit the tension rollers on the shafts for

suspension by rollers.

“Note”: The tension rollers must be placed

so that the big surface lies outwards.

Fit the pressure springs in the check bolts.

Fit the check bolts in the corresponding

bores.

The point of the check bolts should turn so

that it is horizontal.

Press the sliding sleeve from the bottom

against the check bolts.

Press the check bolts back with a screw-

driver and at the same time press the

sliding sleeve upwards.

The bolts should rest in the points of rest of

the sliding sleeve.

R17

009W2329-R01

Fit needle bearing housing, wheel for “AHEAD”

and washer.

Check the axial clearance of wheel for “AHEAD”.

It should be 0.1 – 0.4 mm.

“Note”: For “ASTERN” the axial clearance can be

adjusted by fitting an intermediate washer (thrust

washer).

First fit a washer. Then fit an inner disc and the an

outer disc.

Fit 4 inner and 3 outer discs in this order.

Fit wheel for “AHEAD” with clutch discs on the

thrust collar.

First fir the driving pins through the thrust collar

and the fit the thrust collar with clutch discs and

wheel for “AHEAD” over the needle case on the

input shaft in the sliding sleeve.

R18

009W2229

Fit thrust washer, the oil pockets of which should

turn towards the wheel for “AHEAD”.

Fit the disc springs which should touch with the

outside diameter.

Check the tightening of the disc springs.

The inside diameter of the disc springs must,

when slack, in proportion to the front be

min. 1.1 mm (measure A).

Tighten the disc springs with bush 1 x 56 136 994.

Measure disc clearance between inner disc and

washer with a feeler gauge in two places which

are opposite one another.

The disc clearance to be 0.75 – 0.85 mm.

Deviations should be adjusted with washer

available in different thicknesses.

“Note”: Tighten the disc springs on the side for

“ASTERN” with bush No. 1 x 56 136 995.

R19

009W2329-R01

Heat the tapered roller bearing inner collar to

about 85°C and fit it with the thin end of the

taper roller facing the shaft end of the output

shaft until it fits tightly against the disc

springs.

Tighten the tapered roller bearing with bush

No. 1 x 56 136 995 and original hexagon nut

until it fits tightly against the shaft assembly.

See picture No. 33 overleaf too).

“Note”: Fix the tapered roller bearing for

“ASTERN” with supporting washer and

original hexagon nut.

The torque of the nut is 100 Nm (10.0 kpm).

Secure the nut.

R20

009W2229

The picture shows the ready-mounted

output shaft.

Fitting of Input Shaft

Heat the tapered roller bearing inner

collars to about 85°C and fit it with the

thin end of the bearings towards the

shaft ends.

“NOTE”: Fit wide tapered roller bearing

on the input side.

R21

009W2329-R01

Measuring of Tightening of Tapered Roller Bearing

on Input and Output Shafts with Measuring Gauge.

1 = Housing 3 = Depth micrometer 5 = Output shaft

2 = Input shaft 4 = Measuring gauge 1 x 56 136 978

Heat the bearing bores in the housing to about 85°C and fit the tapered bearing outer

collars with Loctite No. 601.

Build in the tapered roller bearings of input and output shafts with the tightening of 0.03 to

0.08 mm after the cooling.

Measure the tightening as shown on the pictures 35, 36 and 37 and adjust it with adjusting

washers (measure G). Measure G: measure F (difference measure) plus tightening.

Fit the input and output shafts in the housing and fit the measuring gauge on the housing by

means of the pins.

Fit the tapered roller bearing outer collars in the measuring gauge until they fit tightly

against the tapered rollers while constantly turning the input and output shafts with a

pressure of F = 30 N (3.0 kp) on the bearing outer collars.

Measure A = B + C, B = thickness of measuring gauge, C = bearing outer collar above

measuring gauge.

R22

009W2229

1 = Bearing bushing

2 = Measuring gauge

3 = Depth micrometer

Fit the measuring gauge on lower gearbox half.

Calculate the thickness of the intermediate washer G as follows:

Establish measure E as D minus B (thickness of measuring gauge).

Calculate the difference measure F as E minus A (See picture No. 35 on last page).

Calculate intermediate washer G for the input shaft as F plus tightening 0.03 – 0.08 mm.

At the calculations the thickness of the liquid jointing, when compressed, should be included

and an empirical value of 0.02 mm should be considered.

Then fit the necessary intermediate washers in the bearing bores (max. 2 washers per

bore) and heat the bearing bores to about 85°C and fit the roller bearing outer collars with

Loctite No. 601.

R23

009W2329-R01

Measuring of Tapered Roller Bearing tightening on

Input and Output Shafts without Measuring Gauge.

1 = Dial indicator holder 2 = Input shaft 3 = Dial indicator 4 = Driving arrangement

It would be an advantage, if the input shaft and the output shaft are measured individually for

the adjusting of the tapered roll er bearing tightening. The measur ing procedure is the same

both for input as well as for output. Howeve r, only the procedure for the input sh aft is

described here. When measuring the output shaft it should be as described at picture no. 31.

Turn the shafts when measuring in order to compensate for possible deviations, and a fixed

point of measuring should be chosen for marking of the axial clearance.

Heat the bearing bore to about 85°C and fit the outer collar of the tapered roller bearing with

Loctite no. 601.

In order to be able to adjust the tightening of the roller bearing it is necessary that the shafts

show axial clearance. This is obtained by fitting intermediate washers wh ich are 0.2 mm

thinner than those which were removed and marked as described at picture no. 16.

Heat the bearing bor e to about 85°C and fit t he bearing outer collar without Loctite in the

bore.

Place the input shaft in the hous ing after the cooling and fit the lower gearbox half without

any packing and drive in the guide pins.

Fit the contact point of the dial micrometer on the fr ont of the input shaft and turn the shaft

backwards and forwards. During this the shaft should show axial clearance.

If there is no clearance shown. fit thinner washers under the bearing outer collar.

Add the roller bearing tightening of 0.03 – 0.08 mm plus further 0.02 mm (liquid jointing com-

pressed) to the measured axial clearance and thus we get the thickness of the intermediate

washer.

R24

009W2229

Picture No. 37 continued

Measuring example:

Thickness of intermediate washer during the measuring procedure: 0.60 mm

Measured axial clearance of shaft: 0.08 mm

Correct tightening 0.03 – 0.08 mm (average value): 0.055 mm

Thickness of compressed liquid jointing: 0.02 mm

Theoretical thickness of intermediate washer: 0.755 mm

In practice the intermediate washer will be 0.73 – 0.78 mm.

Then insert the correct intermediate washers in the bores (max. 2 washers in each bore)

and fit the bearing outer collars after heating with Loctite No. 601.

Pre-Mounting of Shifting Fork.

Place the reversing shaft in the shifting fork and secure it with the threaded pin and smear it

with Loctite No. 241.

“NOTE”: the long side of the reversing shaft points to the left when the position of the

shifting fork is as shown on the drawing.

R25

009W2329-R01

1 = Shifter shaft

2 = Shift pin

3 = Pressure spring

4 = Gearbox

5 = O-ring

6 = Shift control lever

7 = Grease lubrication

8 = Screw cap

Insert pressure spring, shift pin, oiled

shifter shaft and O-ring in the gearbox.

Press the shift control lever on to

theshifter shaft so tha t shift control

leveris placed in neutral position at

90°±30’to the gear shaft length.

Fit the screw cap with grease

lubrica-ting after the pressing on.

R26

009W2229

Fitting of Bolts in Gearbox

Drive in t he slotted pins 4x16 in

thebolts and fit the washers on the

bolts so that the lubricating groove

in them point to the wheel.

“NOTE”: The bolt must be fitted in

pos. 1 or 2 all depending

on the transmission.

Transmission:

GLL = AHEAD

GGL = ASTERN

Heat the gearbox and fit the bolts

with slotted pins in pos. 1 or 2 all

depending on the transmission.

Fit the hexagon nut and tight en it

with 100 Nm (10 kpm).

Fit the sleeve in the bolt bore

nearest the centre of the gear (s ee

the arrow).

Smear the hexagon nut with

unhardening packing material

before the fitting.

R27

009W2329-R01

Fitting of Input and Output Shafts with Shifting Fork in Gearbox

Place the shaft arrangement as

shown on the picture.

“NOTE”: The long side of the

reversing shaft faces the

input side.

Fit the intermediate wheel and

needle bearing.

Lift intermediate wheel with s top

plate (see illustration).

The intermediate wheel should be

lifted about 25 mm, otherwise fitting

is not possible.

R28

009W2229

Place the housing so that the

opening of it turns upwards.

Oil the roller bearings and reversing

shaft and fit them together in the

housing.

Remove the stop plate.

“NOTE”: The long side of the

reversing shaft points

upwards to the input

side.

Fit retaining plate for intermediate

wheel and before that smear the

screws M8x25 with Loctite No. 241.

Torque: 17 Nm (1.7 Kpm).

R29

009W2329-R01

Smear the seal f aces of the

gearbox halves wit h permanently

plastic liquid jointing.

Oil the bearings on the input and

output shafts.

Assemble the gearbox and drive in

the guide pins.

Tighten the screws M8x25 with a

torque of 17 Nm (1.7 Kpm).

R30

009W2229

Fitting of Shaft Seal Rings

Fit the protective cap No. 1 x 56

136 992 over the input shaft.

Smear the seal ring 25 x 33 x 6 with

a thin layer of grease on the lip ring

and smear with a thin lay er of

plastic liquid jointing on the outside.

Fit the seal ring with punch No. 1 x

56 199 916 so that it fits tightly

against the bore of the housing.

Smear the similar seal ring 32 x 45

x 7 for the output shaf t in the same

way as the seal ring for the input

shaft and fit it by means of punch

No. 1 x 56 136 993 in the housing

so that it fits tightly against the

tapered roller bearing inner collar.

R31

009W2329-R01

Supplement to Fitting of Shaft Seal Rings

A = Distance to shaft seal ring: 22.5 ±0.5 mm.

B = Shaft seal ring binding with surface of casting on the lower gearbox half.

The picture shows the necessary mounting dimensions for the shaft seal rings on the

input and output shafts.

R32

009W2229

Heat the output flange to about

85°C and fit it on the output shaft.

Smear the nut with permanently

plastic liquid jointing and secure it

with a torque of 100 Nm ( 10 Kpm).

R33

009W2329-R01

Picture 55

Fit the screws M8x25 with washers in the

gearbox. Put the gear shift lever in

“neutral” (the sliding sleev e is also in

“neutral” position).

Place the gearbox with gask et in the

opening of the housing and pr ess the

shifting eccentric down into the shifting

fork. In connection with this check at the

same time with a ligh t pressure of the

eccentric pointing to the assembly the

axial clearance between the sliding sleeve

and the shifting fork.

Secure the shifter housing in this position.

“NOTE”: When checking the axial

clearance it must be checked

whether the fixing screws hit

against the walls of the gearbo x

because of the slots which may

lead to wrong adjustments.

Adjustment can be c arried out by axial

displacement (angle 90° m ust be

maintained, see picture 40).

Picture 56

Tighten the shifter housing with a torque

of 17 Nm (1.7 Kpm).

Shift the shift control lever in both

directions and check the function of the

reversing.

The sliding sleeve s hould be connected

(click) in both directions when the angles

of engagement are as equal as possible.

Besides, it must always be possible t o

turn the shift control lever 37° in either

direction without much resistance.

Picture 57

At last fit the dip stick and the loc king ring

at the end of the input shaft when fitted.

Fill oil in the ge arbox to a quantit y

corresponding to the upper mark on the

dip stick.

009W2329-R01

SECTION S

SAIL DRIVE TYPE Z-7

009W2329-R01

CONTENTS

Oil change and gear ratio .......................................................... page S 3

Zinc anode ................................................................................. page S 3

Outside maintenance ................................................................ page S 3

Removal of sail drive from engine and boat .............................. page S 3

Alarm function of double membrane .......................................... page S 5

General (for assembly and dismantling of sail drive) ................. page S 6

Assembling procedure for sail drive .......................................... page S 7

Intermediate housing and intermediate shaft (drawing) ............. page S 12

009W2329-R01

Oil Change and Gear Ratio

As an alternative to the BW7 gear the DV36 can be equipped with a sail drive.

The reduction ratio is 2.25:1 for “AHEAD” and 2.25:1 for “REVERSE”.

The sail drive will need no other attendance than regular change of oil. This to be carried out after

the first 25 hours of operation and then every 150 hours or once a year.

Carry out the oil change when the boat is on land by loosening the drain screw in the bottom of the

sail drive enabling the oil to run out.

Refill with fresh oil through the filler hole at the top of the sail drive to a quantity of 3.3 litres

corresponding to the upper mark on the dip stick.

Use the same quality of oil as for the BW7 gear.

Zinc Anode

A replaceable zinc anode is fitted at the propeller. Check this anode twice a year or as required all

depending on the waters you are sailing in.

Outside Maintenance

Do not grind thoroughly when careening the boat. Damage to the surface treatment should be

treated as soon as possible with special BUKH paint.

The sail drive should be coated with the same bottom paint as the rest of the bottom of the boat.

Removal of Sail Drive from Engine and Boat

(see drawing page S4)

1. Beach the boat.

2. Loosen the bolts marked A in the flange at the double membrane.

3. Loosen the bolts marked B on the flange towards the engine.

4. Loosen the sensing element marked D for water in the double membrane.

5. Lift the sail drive clear of the foundation.

It may be necessary in point 2 to loosen the engine mountings from the foundation and to lift the

engine a little in order to loosen all the bolts marked B.

009W2329-R01

‘

Alarm Function of Double Membrane

A sensing element is fitted in the double membrane. The element is shown on the diagram below.

The sensing element is connected to the the operating panel and if water penetrates into the

double membrane it will release an acoustic alarm.

As a precaution the alarm function should be checked once or twice a year by short-circuiting the

connections 1 and 2 on the plastic box No. 008E5840 placed on the engine next to the multiple

plugs.

009W2329-R01

The instruction below is stated for assembling of sail drives as broadly the disassembly

procedure is to be carried out in reverse order noting the thickness and the placing of the

different intermediate washers.

General

At the assembly all parts must be clear, burred and free from grease.

In order to prevent wrong measuring when adjusting, the parts should normally not be oiled when

being assembled.

Heat the mounting houses with a hot-air blower, an oven or the like to 80°C when fitting the

bearings in accordance with the procedure. However, the temperature must not exceed 140°C.

When replacing gear-wheels, change them two and two, i.e. do not change one single gear-wheel,

but one connected set of gear-wheels.

When replacing the coupling arrangement at the top of the sail drive, replace the whole

arrangement without repairs of single components of it. This should be seen in the light of the fact

that a correct repair of the coupling arrangement demands a very advanced measuring equipment

which only very few have at their disposal.

The special tools mentioned in this instruction are not numbered, but can be ordered with

reference to this section of the workshop manual through BUKH´s spare parts department.

Both distance measure and flange clearance are always marked on the wheels, and they apply to

the wheel on which they are written.

The sail drive comprises 11 filling pieces each consisting of an intermediate washer at the least.

009W2329-R01

Assembling Procedure for Sail Drive

1. Measure the intermediate piece (between engine and clutch housing), the clutch housing

and the end cover for the same, and then the “K” measure can be worked out.

2. Up-end the clutch shaft so that any clearance is equalized. (about 2 kg compression, if it is

not possible to up-end the shaft). At the same time the gear-wheel should be engaged.

Measure the “J” measure now. Measure the “C” measure for use later on under point 10.

3. Measure the “H” measure in order to find the centre of the vertical intermediate shaft.

Measure the “G” measure as “F” measure + “A” measure, as the “A” measure is written on

the gear-wheel.

Measure the “F” measure while the shaft still stands on its edge, so that any clearance is

equalized.

Calculate the thickness of the intermediate washer “IIv” as: “H” measure minus “G” measure.

4. Calculate the thickness of the intermediate washer “IIr” as: “K” measure minus sum of “J”

measure and intermediate washer “IIv”.

5. Fit the intermediate piece on the clutch housing with liquid jointing as filling piece.

6. Fit the reversing part at the top of the clutch housing as follows:

a. Put the reversing lever in “Neutral” position and the pipe collar too.

b. Lead the reversing house with gasket into the opening of the clutch housing and press the

shifting eccentric into the wedge-shaped groove of the shifting fork. In order to equalize the

axial clearance between the shifting fork and the pipe collar the shifting eccentric should be

fitted with the groove in the shifting fork with a light pressure.

c. Tighten the reversing house in this position.

NOTE: The clearance of the angle between the longitudinal shaft of the gear and the

one of the reversing lever must be observed. The angle is to be 90°±30`.

Use a reference gauge for this purpose.

When adjusting the reversing house the fixing screws must not encounter the wall of the

slots of the reversing house as this would lead to wrong adjustment.

d. Shift the reversing lever in both directions and test the shifting function. In both shifting

positions the pipe collar be connected (click), when the angles of engagement measured

on the reversing lever are as equal as possible.

Besides, it must always be possible to turn the reversing lever 37°. The adjustment is

corrected by axial displacement of the reversing house, the angle of 90° being observed.

e. In order to test the function of both clutches turn the input shaft (clutch shaft) round by hand

and brake the output shaft by hand when engaged.

The upper part of the sail drive is now temporarily ready.

009W2329-R01

Measure on the intermediate wheel as follows:

7. 1.0 mm is chosen as thickness of the intermediate washer “III” as starting point.

8. Freeze the gear-wheel and measure the stagger between the inner collar and outer collar

of the bearing. Fit the bearing with the ball filler hole facing the adjusting washer “IV”.

Fit the next bearing correspondingly. Punch the inner collar when fitting it to secure that

the two inner collars touch each other.

Measure the intermediate bearing housing for the measures “D” and “E”.

9. Measure the “M” measure for use later on.

10. Calculate the thichness of the intermediate washer “IV” now, the intermediate washer = “C”

measure minus the sum of “D” measure and “B” measure.

“B” measure is written on the gear-wheel.

11. Measure the “L” measure, then calculate the thickness of the intermediate washer “V”,

this washer being = “L” measure minus the sum of “E” measure and the intermediate

washer “IV”.

12. Fit the intermediate wheel in the bearings and secure it with a Seeger circlip in accordance

with the drawing for it.

13. Fit the bearing housing with intermediate wheel in the gearbox with O-rings.

14. Remove the end cover in the clutch housing together with the shifting fork arrangement for

the test described in the next point (15) to be carried out.

15. Mount the clamping tools for fixing of the big gear-wheel. Mount a dial indicator on the gear-

wheel of the clutch shaft through the upper opening at the reversing handle of the clutch

housing, so that the indicator meets the following requirements.

a. Point of contact about in the middle of the tooth flank and of the pitch circle.

b. The indicator should be vertical in the longitudinal and height direction of the tooth flank.

With the bigger gear-wheel (z=45) fastened, measure the flank clearance. Measure both

the wheels of the clutch shaft in this way.

If occasion should arise, adjust the clearance to the one stamped which is correct by

changing the washers “IV” and “V”.

16. Refit the end cover and the reversing arrangement as stated under point 6.

17. Measure the propeller house for “O” measure, “W” measure and “U” measure.

18. Fit the bottom conical gear-wheel marked “X” at a torque of 125 Nm±5 Nm (13 ±0.5 Kpm)

on the intermediate shaft of the propeller house.

19. The intermediate washer “VI” normally is 1.5 mm and must never be used smaller. Fit the

intermediate washer “VI” on the shaft together with the bearing, the ball filling opening of

which should turn up.

20. Measure the intermediate washer “VII” with a feeler gauge and fit the correct thickness

together with the upper locking ring.

009W2329-R01

21. Calculate the “T” measure. The “S” measure is stamped on the gear-wheel whereas the

“R” measure has to measure. “T” measure = “S” measure minus “R” measure.

22. The intermediate washer ”VIIIB” should be: the sum of “T” measure and “Q” measure

minus the difference of “U” measure and “O” measure.

23. Find the thickness of the intermediate washer “VIIIA” by measuring the bearing outer collar

“N” measure, after which the washer should be: the sum of “M” measure and “O” measure

minus the sum of intermediate washer “VIIIB” and “N” measure.

24. Having finished the measuring of the intermediate shaft remove the gear-wheel marked

“X” again and fit the needle bearings “Z” and “Y” after the house has been heated.

25. Fit the intermediate shaft with bearings in the propeller housing.

26. Refit the gear-wheel marked “X” and tighten it with the same torque as indicated in point

18.

27. Check whether the distance measures of the small gear-wheel are correctly adjusted with

the fitted washers (“T” measure) with special tools.

28. Measure the “V” measure.

29. Heat the bearing housing “Æ” and fit the bearing with the ball filling opening facing the

gear-wheel side.

30. Measure the thickness of the washer “X” with a feeler gauge (between locking ring and

outer collar of the bearing ).

31. Calculate the intermediate washer “IX”. The “W1” measure is indicated on the gear-wheel.

The intermediate washer = “W” measure minus the sum of “V” measure and “W1” measure.

32. Fit the output shaft with gear-wheel in the cover for propeller house with seals.

33. Fit cover with shaft and gear-wheel in the propeller housing.

34. Check the flank clearance at the output shaft.

The intermediate shaft is blocked and on the propeller shaft a lever is placed, on which

should be measured at difference radius R=40 mm. The shaft nut must be tightened.

The correct flank clearance is indicated on the gear-wheel and is corrected at the

intermediate washer “IX” if necessary.

On pages S10, S11, S12 and S13 longitudinal sections of the sail drive with places of measuring

drawn in are shown, partly by a general drawing and partly by detail drawings.

009W2329-R01

S10

009W2329-R01

S11

009W2329-R01

S12

009W2329-R01

S13

009W2329.R01

SECTION T

IRREGULAR OPERATION, CAUSES AND REMEDIES

009W2329.R01

CONTENTS

Engine does not start ................................................................ page T 3

The engine starts, but stops soon after ..................................... page T 3

The engine does not reach maximum output ............................ page T 3

Knocking operation of engine .................................................... page T 3

Engine speed too high ............................................................... page T 3

The engine knocks .................................................................... page T 3

The engine smokes ................................................................... page T 3

Excessive consumption of lubricating oil ................................... page T 3

Excessive fuel oil consumption .................................................. page T 3

The engine gets too warm or too cold ....................................... page T 3

Insufficient or no lub. oil pressure .............................................. page T 3

009W2329.R01

1. Engine does not start

SYMPTOM CAUSE REMEDY

Insufficient or very little compression Inlet and/or exhaust valves leaking Grind or replace the valves, mill the seats

Inlet and/or exhaust valves sticking

Grease valve stems with 2/3 gas oil and 1/3 lub.

Oil. If necessary clean the valves.

Insufficient rocker arm clearance

Adjust to 0.25 mm inlet and 0.3 mm exhaust when

engine is cold (turn left)

Piston rings stuck in grooves or are worn Replace piston rings

Valve springs broken or are weak Replace springs

Insufficient or no pressure from fuel pump Air in fuel system or nozzles sticking Bleed or renew nozzles

Thermo start out of order No fuel (valve leaking) Fill up (renew thermo-start)

Electric supply out of order

Check and/or replace switch and connections.

Chech fuse

Engine does not reach normal revs Unloaded battery or defective Battery to be charged or renewed

Starter motor turns engine too slowly Loose or corroded connections Tighten or clean connections

2. The engine starts, but stops soon after

The engine starts, but stops soon after Empty fuel tank Refill and bleed

Air in fuel system Bleed

Nozzle sticking Replace nozzle

Fuel filter clogged Replace filter element. Clean the tank

3. The engine does not reach maximum output

Difficult to start None or insufficient compression See ”engine does not start”

The engine revs. Is reduced considerably

when loaded

Fuel supply choked up.

Air/water in fuel system

Check fuel system thoroughly

Governor incorrectly adjusted or something

in the system works sluggishly

Adjust the governor. Check governor system and

correct the error

Hot engine (smell of heat) Insufficient cooling water supply Stop engine. Check cooling water pump

Damaged cylinder liner or bearings Check bearings, piston and cylinder, if necessary

replace them

4. Knocking operation of engine

The engine runs unevenly Air/water in fuel system

Fuel filter clogged

Bleed see ”engine does not start”

Replace filter element. Clean the tank

5. Engine speed too high

Governor not working properly Governor spindle is bent or works sluggish Repair or replace spindle

Governor not properly adjusted Governor arm has turned on the spindle Adjust arm

Engine runs too fast during idling Idler spring too tight Repair or replace spring

6. Engine knocks

Hard knocking sound at the combustion Incorrect adjustment of the injection time Adjust timing

Knocking sound from engine Loose connecting rod bolts

Worn or burnt bearings

Piston and cylinder liner highly worn

Tighten bolts

Replace bearing shells

Replace piston/cylinder liner

7. The engine smokes

Black smoke Clogged air inlet filter Clean filter

Insufficient compression See ”engine does not start”

Blue smoke The lube oil passes piston and oil rings an

penetrates into combustion chamber, or

vacuum valve defective

Replace oil rings and possibly the piston rings.

Clean vacuum valve

Grey smoke Thermostart valve is leaking Replace

8. Excessive consumption of lubricating oil

Blue smoke Oil- and piston rings are worn Replace oil- and piston rings, if required

Piston and cylinder liner highly worn Replace

Defective vacuum valve Replace

Lub. oil leaks out of crankshaft bearings Worn oil seal ring Replace

9. Excessive fuel oil consumption

Lubricating oil thinned with fuel oil Leakages at the fuel lift pump Check lift pump and replace if necessary

Fuel pipes or hoses leaking Check fuel line

10. The engine gets too warm or too cold

Cooling water temperature too high

(smell of heat)

Unsufficient cooling water supply caused

by:defective water pump, choked strainer or

a defective thermostat

Investigate pump rotor for broken wings or lost

driver screw. Clean strainer. Clean or replace

thermostat

Cooling water temperature too low Defective thermostat Clean or replace thermostat

11. Insufficient or no lubrication oil pressure

Oil warning lamp lights up. Oil pressure

gauge indicates abnormally low oil pressure

Insufficient lube oil in the engine Check and refill

Leakage in lube oil system Tighten and refill

Relief valve sticking or spring too weak Clean bore and valve, stretch or replace the spring

As to defects of the fuel pump see special section on this page H13.

009W2329-R01

SECTION V

MAINTENANCE

009W2329-R01

CONTENTS

Recommended maintenance and check list .............................. page V 3

009W2329-R01

RECOMMENDED MAINTENANCE AND A CHECK LIST FOR BUKH ENGINES

1. Tightness of connections through hull:

CHECK

RECTIFY IF NEEDED

EVERY

YEARS

1.1 stern tube hull connection change sealing X

2. Check of lubricating oil:

2.1 a engine change oil - X X

2.1.b engine check oil level - X

2.2.a gearbox change oil - X

2.2.b gearbox check oil level - X

2.3 lubricating oil filter change - X

3. Check of cooling watersystem:

3.1 system system to be full fill up X

3.2 anti freeze liquid check for minus 25°C. refill anti freeze liquid X

3.3 cooling water connections tightness for leaks renew if leaking X

3.4 condition of rubber hoses cracks and leaks renew X

3.5 V-belt for cooling water pump adjust or renew - X

3.6 thermostat renew after 5 years - X

4. Check of fuel system:

4.1 supply line clean water/fuel separa-tor

and check line bends repair if damaged or

renew

4.2 fuel tank drain for water - X

4.3 fuel filter change - X

4.4 return line check for bends & damages repair if damaged or

renew

5. Check of remote control cables:

5.1 cables check easy operation and

stroke sufficient

adjust cables X

6. Check of propeller shaft arrangement:

6.1 rear stern tube bearing check clearance for bearing

insert renew insert X

6.2 sufficient water flow to rear stern tube bearing check that water holes in

bearing housing are not

blocked

clean holes X

6.3 alignment of gear flange and prop.shaft flange alignment to be within 0.05-

0.01mm realign the engine X

6.4 stuffing box seals tightness renew all three seals X

6.5 condition of rubber tube for stuffing box cracks renew X

6.6 Out-Board gearoil. oillevel refill X

6.7 propeller check size and condition renew if damaged X

7. Starting of the engine:

7.1 start with electrical start engine start within 2

minutes

if malfunctions -the

engine must be ser-

viced by a mechanic

7.2 start with handstart same same X

8. Engine maintenance

8.1 valve clearance clearance adjust X

8.2 electric starter rust protection of starter

drive

spray rust protection

spray

9. Running with engine - check:

9.1 Idling speed to be 900-1200 RPM 900-1200 RPM adjust RPM X

9.2 Full speed unload / min. 3700 RPM min. 3700 RPM adjust RPM X

9.3 Full speed loaded with propeller 3300-3600 RPM adjust RPM X

9.4 Cooling water temp. to be max. 75

degr. Celcius

max. 75°C change termostat X

9.5 Audible and visual alarms check function change senders, lamps

or switch X

9.6 Lubricating oil pressure min. 1.5 kg/cm² at idling adjust oil relief valve X

9.7 Gearbox change from FW to Neutral to

ASTERN check cables adjust X

10. Air supply:

10.1 air inlet filter renew - X

11. Bateries:

11.1 level of liquid check, refill renew X X X X

11.2 voltage conditon charge renew X

Bukh Dv36 48 Workshop Manual 1003418 009W2329_SECTION Any User

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