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SECTION 14 TOOLSSPECIAL

ITEMS

PISTON STOP
USED ONALL
MODELS OF LAWNBOY ENGINES.

PART NO. 426814
Used to hold flywheelin place while loosening or tighteningflywheel nut.
Remove spark pug and install piston stop.
Screw finger-tightin spark plug opening.

CRANKSHAFTGUIDE
USED ON LAWN-BOYMODEL “C”
D-400, D-500, D-600
SERIES ENGINES.
PART NO. 602887
Shown used to remove the armature plate
and bearing assembly. Hold loose needles
in
bearing race on “ D ’ Series Engines.
I Shown used to reassemble the armature
plate and bearing. Protects oil seals onboth
“C” and “D” Series Engines.

“D” SERIES
GOVI RNOR ADJUSTING GAUGE
USED ON
D-400,
D-500
AND
D-600
SERIES ENGINES.

PARTI NO. 604541
Used ’to adjust
governor lever on“D” Series
Engines only.

“C” SERIES
GOVERNOR ADJUSTING GAUGE

PART NO. 602885
Used to adjust governor lever on“C” Series
Engines only.

4-2

SERVICEBULLETINREFERENCES

SECTION 14

TOOLS

SPECIAL ITEMS
AIR GAP GAUGE
USED ON “D” AND“F” SERIES ENGINES
PART NO. 604659
.010 thick gauge to adjust air gap between flywheel
magnet and heels of laminations on ignition coils,
C.D. pack and alternator assemblies.

FLYWHEEL
AIR GAP
GAUGE
NO. 604659

TEST PLUG
PART NO. 426814

USED ON ALL LAWN-BOYENGINES.
to
Removesparkplugfromengine.Used
check
function
and
output
of ignition
systems.

SERVICE BULLETIN REFERENCES

14-3

SECTION 14

TOOLS

SPECIAL ITEMS

TOOL DRIVER HANDLE
PART NO. 378737

:

Used with tools 605081,and 605082.

BEARING REMOVER
USED ON D-400 AND D-600
SERIES ENGINES.
Used with Driver, Part No.
378737 and soft hammer to
drive old bearing out from the
top towards bottom of the
armature plate.

BEARING INTALLER
USED ON D-400 AND D-600
SERIES ENGINES.
PART NO. 605081
Use with Driver, Part No.
378737 and soft hammer to install new bearing in m a ture plate. Drive from bottom
towards top of m a t u r e plate
until Bearing Installer bottoms on armature plate face.
Always drive bearing into
plate with “lettered” end
of bearing
cage
positioned
against head of tool.
14-4

SERVICE BULLETIN REFERENCES

SECTION 14

TOOLS

SPECIALITEMS

COMPRESSION PLIERS
PART NO. 303857
USED ON ALL LAWN-BOYENGINES.
To remove the wrist pin retaining ringsfrom
pistons.

WRIST PIN TOOL
PART NO. 602884
USED ON ALL LAWN-BOYENGINES.
: Used

to remove and assemble wrist pins in

pistons.

RING COMPRESSOR

USED ON c AND D SERIES ENGINES
PART NO.426020
Stagger ring and gaps,
liberally
coat
cylinder walls, piston skirt and rings with
oil and clamp rings with Ring Compressor.
Slipping cylinder over rings whilethey are
being held in this manner eliminates ring
breakage and damage to piston, and cylinder.
SERVICE BULLETIN REFERENCES

SECTION 14

TOOLS

SPECIAL ITEMS

NOTE: “F” Series only.

CRANKSHAFT SUPPORT GAUGE

PART NO.609968
“F” SeriesOnlyCorrectly
positions crankshaftsupport’
to crankshaft
cover
during
reassembly.

14-6

SERVICE

BULLETIN

SEAL INSTALLER
PART NO. 608976
USED ON
ALL
“C”, “D” AND “F”
SERIES LAWN-BOY ENGINES.
Used to install upper and lower main bearing seals.

SERVICE

REVISED 1983

14-7

SECTION 14

TOOLS

SPECIAL ITEMS

To replacebearing,press out damagedor worn
bearing with special Lam-Boy removal tool, part
number 608361,and press in replacement with special installer tool, part number 608360.

NOTE
Do not drive bearings in or out.They
must be removed or replaced using arbor
press as illustrated.

BEARING REMOVER
PART NO. 608361
Used to remove bearings from diecast
transmission housings on gear drive models.

BEARING INSTALLER
PART NO.608360
Used to install bearings in diecast transmission housings.

14-8

REFERENCES
REVISED 1983
BULLETIN

SERVICE

SECTION 14

TOOLS’

SPECIAL ITEMS

FLEXHONE
PART NO. 609765
USED ON “C”, “D” AND “F” SERIES
LAWN-BOY ENGINES.
Used to break the glaze on cylinder
walls.
NOTE:
For use in slow speed and reversible drill
each direction.USE
for5-7strokesin
WITH OIL.

UNIVERSAL ENGINE
HOLDING FIXTURE
PART NO. 681865

Special engine holding fixture
for C,D, and F Series LawnBoy engines.

SERVICE BULLETIN REFERENCES

SECTION 14

TOOLS

SPECIAL ITEMS

HYDROMETER (BATTERY TESTER)
FOR
LAWN-BOYWET CELL
BATTERIES
PART NO. 681007
State of ChargeSpecificGravityReading
ChargedFully
75% Charged
50% Charged
25% Charged
Discharged

1.265
1.225
1.190
1.155
1.120

1. Remove caps from battery using screwdriver.

2. Place hydrometer (part no. 681007) (see
figure 3) intoeachcell.Squeezebulb
on top of hydrometer and release slowly.
3. Number of ballsfloatingindicatescondition of battery. If any cellreads two
ballsorless
floating, rechargebattery
for 10 hours.

TRIMMER SPECIAL TOOLS

14-10

SERVICE BULLETIN REFERENCES

SECTIONTOOLS
14

SERVICE BULLETIN REFERENCES

SPECIAL ITEMS

14-11

C O M P L I A N T M O W E R S E R V I C E TOOLS

PART NO. 683055

611592
CLUTCH
REMOVAL
TOOL
USED

TO RETAIN BRAKE
CLUTCH
ASSEMBLY.

683242 CLUTCH PULLER
USED TO PULL BRAKE CLUTCH ASSEMBLY.
14-12

REVISED 1983

SERVICE BULLETIN REFERENCES

COMPLIANT’M O W E R S E R V I C E TOOLS

611918 SEAL PROTECTOR

USEd TO PROTECT SEALS DURING INSTALLATION

TO ALIGN ENGINE ON MOUNTING PLATE

611591 MOUNTING PLATE
LOCATOR
USED

USED
611703
CONTROL CABLE GAUGE
SERVICE BULLETIN REFERENCES

TOCONTROL
CABLE
ADJUST
REVISED 1983

14-13

COMPLIANT MOWER SERVICE TOOLS

611702 BRAKE SWITCH ADJUSTING GAUGE

USED!TO ADJUST BRAKE SWITCH

3-JAW PULLER AVAILABLE FROM
OWATONNA TOOL CO., OWATONNA MN.

OTC NO. STD-80

Used to removebearing,rampand
from crankshaft.
14-14

arm assemblyUsed
to remove clutchplate fromcrankshaft if
separates.
“BBC” assembly
REVISED 1983

SERVICE BULLETIN REFERENCES

SERVICE SHOPAIDS

SECTION 14

384884

Ultra Lok is an adhesive used on
all fastener's under
the deck.

388517

!

390928

SAFETYWARNING
Will burn if it comes into contact with
skin.

SERVICE BULLETIN REFERENCES

REVISED 1983

14-15

378642

609790
50 cc’s

610377
6 cc’s

LAWN-BOY OIL TEST CARDS

Easy to use when demonstrating to customer the
proper fuel/lubricant mixture.
Occasionally it is necessary to provide visual evidence that an insufficient amountof lubricant was
mixed inthe fuel. Usingthis card will help to determine if the mixture was or was not correct.
TEST PROCEDURES: Determine what kindof oil
and gas the customer was using. I t then becomes
necessary to correctly mix the same kind of oil and
gas in the recommended ratio. (32:l or 16:l)
14-16

Placea sample of the customer’s mixture in #2
circle and a sample
of the correct mixture in
#3 circle.
Placeasample of straight gasolinein #1 circle.
Gasoline evaporates very quickly. When gasoline in
#1 has evaporated, it w
l
l
ialso have evaporated from
#2 and #3.The circle withthe darkest appearance will
have more oil than the other. This test should be
made in the presence of the customer to eliminate
doubts of the results.
Use as an aid for selling Lawn-Boy Lubricant.

REVISED 1983

SERVICE BULLETIN REFERENCES

LAWN-BOY
MOWER
MONITOR

SERVICE BULLETIN REFERENCES

REVISED 1983

A digital voltmeter is recommended for use in
checking battery voltage also to determine the battery charger output.
Open circuit voltage (O.C.V.) of all batteries r e
ceived on warranty claims will be checked. If they
register .O volts or more when received and can
be recharged, the warranty claim will be rejected
and returned with the battery. If possible, battery
should be placed on an electric start mower and
checked for cranking ability.
Before returning a battery
to the factory with a warit "won't hold ortakea
rantyclaimbecause
charge," or "will not crank the engine," please refer
to Section 13, page 18 of the Lawn-Boy Service
Manual for the testing procedures.
Step 1 Check battery voltagewith a volt meter before charging.

Step 2 -If the meter indicates an open circuit voltage (O.C.V.) of 11.O volts or more, connect
it to the Lawn-Boy charger for a period of
24 to 48 hours.
Step 3 Disconnect charger andlet battery set for a
minimum of 24 hours.
If battery voltage is 12.3 volts or higher after completion of this procedure, it should be returned to
the customer for continued use. If possible, place it
on an electric start mower and check for cranking
ability.
If possible, the customer's battery charger should
be checked. It should produce between 8 and 12
volts on a volt meter.
The Digital Multi Meter illustrated is available from
the Lawn-Boy Service Department.It will check AC
and DCvoltage,AC
and DCcurrent,resistance,
check diodes, amperes and continuity.

S.L.A. BATTERY

MODEL 8050 SOAR DIGITAL MULTI METER

14.18

REVISED 1983

SERVICE BULLETIN REFERENCES



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