Husqvarna W3613Ets W4815Ets Users Manual OM, W 3613 ETS/ 4815 ETS, 2001 09, Walk Mower (Turf Care)

W3613ETS, W4815ETS HUSO2001_USen_O0103004_

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Operators Manual

Models:
968999117 / W3613ETS
968999120 / W4815ETS

Please read these instructions carefully and make
sure you understand them before using the machine.

MANUAL NO. 539106457 REV. IR (09/20/01)

Thank you for buying an HUSQVARNA! Before operating your new mower, read, understand
and follow the important safety instructions and the other instructions contained in this manual.
Lawnmowers and all power equipment, can be potentially dangerous if used improperly.
SAFETY REQUIRES GOOD JUDGEMENT, CAREFUL USE IN ACCORDANCE WITH
INSTRUCTIONS AND COMMON SENSE.

INTRODUCTION
This manual has been prepared for the operators of the HUSQVARNA 36" and 48" commercial
mowers. Read, understand, and follow the safety and operating instructions.
Always stop the engine and blades, place the traction levers in drive, and place the mower in gear
when leaving unattended.
The steering system of this mower uses individual right and left drive levers on the upper handle.
Squeezing the traction lever will reduce tension on the wheel drive belt eliminating power to that
wheel. With the opposite wheel still under power a turn is accomplished. If the traction lever is
squeezed even tighter the brake will be applied to that wheel and a tighter more abrupt turn is accomplished. LEARN HOW TO USE THESE IMPORTANT STEERING/BRAKE CONTROLS!
As an additional safety feature, these mowers are equipped with an Operators Presence System.
This is an electrical interlock safety system which is activated by depressing either one or both of
the Operator Presence Levers above the handle grips. Releasing both Operators Presence Levers
while mowing or transporting will break the electrical circuit and cause the engine and mower to
stop. The mower will not stop immediately after releasing the O.P. levers, some travel does occur.
TECHNICAL ASSISTANCE
If you have any questions pertaining to your mower contact your dealer. To locate the nearest dealer
please call: 1-800-HUSKY-62.
For technical assistance please write: Husqvarna, 9906 Perimeter Woods Drive, Charlotte, NC,
28216 or call: 1-800-HUSKY-MD.

!

WARNING

!

THE ENGINE EXHAUST FROM THIS
PRODUCT CONTAINS CHEMICALS
KNOWN TO THE STATE OF
CALIFORNIA TO CAUSE CANCER,
BIRTH DEFECTS OR
OTHER REPRODUCTIVE HARM.

2

Table of Contents

SAFETY ................................................................................................. 4
SETUP AND ADJUSTMENTS ................................................................ 5-11
OPERATION .......................................................................................... 11-12
SERVICE ............................................................................................... 13-15
MAINTENANCE CHART ........................................................................ 16

3

Safety
! WARNING ! : Failure to comply with the following instructions may result in serious injury to
the operator or other persons. The owner must
understand these instructions, and must allow
only persons who understand these instructions
to operate the mower. Each person operating
the mower must be of sound mind and body
and must not be under the influence of any mind
altering substance.

5. Fill gasoline tank before starting the engine.
Only use an approved gasoline container. Do
not smoke near open gasoline containers. Do
not fill gasoline tank indoors or when engine is
running or hot. Wipe off any spilled gasoline
before starting engine.
6. Never attempt to make any adjustments
(even the smallest) when engine is running.
7. Mow only in daylight or good artificial light.
8. Never operate mower in wet grass. Always be
sure of your footing; keep a firm grip on the
handle and walk, never run.

TRAINING
1. Read this manual carefully and question your
dealer if something is not clear. Should the
dealer be unable or unavailable to answer your
questions, call or write our factory.
2. Be thoroughly familiar with the controls and
proper use of the equipment.
3. DO NOT allow children in the yard or area
when the mower is operating.
4. DO NOT allow pre-teenage children to
operate mower.
5. Allow only responsible teenagers with mature
judgment to operate mower and only when
being supervised.
6. Keep the area clear of all persons, particularly
small children and pets.

OPERATION
1. Do not change engine governor settings or
over speed the engine.
2. Keep hands, feet, and clothing away from
rotating parts when operating mower.
3. Disengage blade drive when crossing gravel
drives, walks, roads or under any condition
where thrown objects might be a hazard.
4. After striking a foreign object or if mower
vibrates abnormally, stop the engine and disconnect the spark plug. Inspect the mower for any
damage and repair the damage.
5. Stop the engine and wait for the blades to
stop rotating whenever you leave the operating
position for any reason, including emptying the
grass catcher or making any adjustments or
repairs.
6. Mow across slopes, never up and down. Use
caution when changing direction on slopes.
Always turn uphill. Do not mow very steep
slopes. Do not use sulky on any slopes.
7. When parking mower, stop engine and leave
drive levers down in DRIVE position with transmission in gear to prevent rolling. Never park
mower on a slope.
8. NEVER OPERATE THIS EQUIPMENT,
WITH ENGINE RUNNING, IN AN ENCLOSED
OR CONFINED AREA WITHOUT PROPER
VENTILATION OF THE ENGINE EXHAUST.

PREPARATION
1. The use of personal protective equipment,
such as (but not limited to) protection for the
eyes, ears, feet and head is highly recommended.
2. Never operate the mower without proper
guards, covers, safety switches and devices in
place and properly functioning. Inspect to
determine that these safety devices are installed
properly, are in good condition and operate
properly. If the condition of any of these devices
is questionable, they must be replaced or
repaired before using the mower.
3. Thoroughly inspect the area and remove all
stones, sticks, wire and other debris. Also note
other possible hazards such as holes, stumps,
sprinkler heads etc..
4. Do not operate the mower when barefoot or
wearing open shoes. Always wear substantial
footwear and long pants.

4

Setup & Adjustments
LINKAGE INSTALLATION
1. Install drive linkage into the hole in the idler
arm on the inside of the tank support. The drive
linkages are fastened to the drive levers on the
handle assembly. Secure the drive linkages to
the idler arm by inserting a retaining ring
through the small hole in the end of the drive
linkage.
2. Install shifter to transmission with 1/4" x 1"
screws.
The shifter is located in the inner box and
hardware is pre-assembled into the bracket on
the transmission.
3. Install blade control rod into the bellcrank on
the left side of the tank support. Secure rod with
ring type retainer.
4. Refer to the section of this manual on adjustments for the proper adjustment of the linkages
you are installing. The linkages were set at the
factory but must be checked before operating
mower to insure of the proper setting. Always
check 100% of the adjustments before you
operate the mower.
5. Connect the two halves of the wiring harness
together. The four prong connectors have a
locking tab that shows which way to line them
up and guarantees that they are connected
properly when the lock snaps.
6. Install the chute deflector to the side of the
mower deck. Bolt it into place using the two 5/
16" x 1" screws and nuts pre-assembled into
the mounting tabs on the deck. Tighten the
screws very securely with the chute completely
covering the discharge opening and tight
against the side of deck.

MAINTENANCE
1. Keep all nuts, bolts, and screws tight to keep
mower in safe operating condition.
2. Never store the mower with gas in the tank
inside a building where fumes can reach an
open flame or spark. Allow engine to cool
before storing in an enclosure.
3. To reduce fire hazard, keep mower free of
grass, leaves, or excessive grease.
4. Check grass catcher assembly frequently for
wear or deterioration. Replace bag if loose
seams or tears are evident.
5. Have your mower inspected and serviced
each year by an authorized HUSQVARNA
dealer. Determine if any additional devices are
available which might upgrade the safety of your
mower.
6. Use only authentic HUSQVARNA replacement parts to insure the safety and quality of
your mower is maintained.
7. Safety decals should be replaced if they are
missing or illegible. Decals may be purchased
from your HUSQVARNA dealer.
FRONT CASTER WHEELS
1. Mount front caster wheel assemblies. Installation includes fastening casters to front of the
cutter deck using 3/8 x 1" hex head capscrews.
FUEL TANK
1. Place fuel tank on tank support, making sure
to get the studs through the slots on the top of
the tank support. Place the 5/16” flat washer,
spring, the other 5/16 flat washer and the 5/16”
nut on the stud. Snug 5/16” nut, but do not over
tighten.

THROTTLE INSTALLATION
1. Connect the throttle cable end to the throttle
mechanism on engine, leaving the cable clamp
loose. Push throttle lever on console completely forward. Then pull the cable through the
clamp on engine and tighten the cable clamp.
Move the throttle lever back and forth to ensure
proper installation.

HANDLE ASSEMBLY
1. Align the upper mounting holes in handle with
the upper hole in the tank support.
2. Install two 3/8" x 1" screws through matched
holes and loosely install 3/8" nuts.
3. Align the lower holes and install hardware as
above, tighten upper and lower hardware.

5

Setup & Adjustments
GAS LINE INSTALLATION
1. The gas line is factory installed on the engine.
Attach loose end to fuel tank hose barb and
secure with hose clamp.

BRAKE ROD ADJUSTMENT
1. Make sure the rod is installed into the proper
hole in the brake arm. The brake rod should be
in bottom hole on the brake arm as shown
below. Never use the upper hole. The proper
adjustment can not be achived in this position.

POSITIONING FRONT CASTER SPACERS
1. Using the cutting height chart, find the correct
number of spacers to be placed under the
caster swivel.

2. To increase braking. Turn the wing nut down
on the brake rod. Do not turn the wingnut down
to far as this will result a constant braking action
and will excessively wear the brake band and
cause premature failure.

2. Remove the lynch pin and washer from the
top of caster and reposition spacers to the
desired cutting height from the chart. See figure
#2

Wingnut

AXLE HEIGHT ADJUSTMENT
1. To adjust rear axle, stop engine and place
drive levers in the neutral lock position, remove
spark plug wire.
2. Remove lower belt shield from underside of
rear deck for better access to axle adjustment
bolts.

Brake arm

3. Loosen axle pivot bolts and axle adjustment
bolts.
See figure # 1.

Brake Rod

4. Place a jack under center of rear deck raise
the jack slightly so axle adjustment bolts may be
removed.
5. With the jack raise or lower the rear deck to
the desired position using the chart to ensure
proper height. Reinstall the axle adjustment
bolts and tighten.
A tapered punch may be used to help align the
holes. See figure #1.
NOTE:
It may be necessary to readjust drive and brake
linkages.
NOTE:
To achieve the best quality cut, the blades
should be level with the ground or slightly tipped
forward

6

Setup & Adjustments
REAR AXLE HEIGHT ADJUSTMENT
AXLE PIVOT
BOLTS

AXLE ADJUSTMENT
BOLTS
POSITION A
PLACE JACK
HERE

POSITION B
POSITION C

LOOSEN BOLTS EACH
SIDE

POSITION D
Figure 1

CASTER HEIGHT ADJUSTMENT

MACHINERY BUSHING
1/2" SPACERS

CASTER SWIVEL

Figure 2

7

Setup & Adjustments
CUTTING HEIGHT ADJUSTMENT CHART

AXLE
POSITION

NUMBER OF
NUMBER OF 1/4" BLADE SPACERS
SPACERS BELOW
UNDER CUTTER HOUSING
CASTER ARM
4
3
2
1
0
4
3
2
1
0
4
3
2
1
0
4
3
2
1
0
4
3
2
1
0
4
3
2
1
0
4
3
2
1
0
4
3
2
1
0

0
A
1

2
B
3

3
C
4

4
D
5

CUTTING HEIGHT
(IN INCHES)
1 1/2
1 3/4
2
2 1/4
2 1/2
1 3/4
2
2 1/4
2 1/2
2 3/4
2 1/2
2 3/4
3
3 1/4
3 1/2
3
3 1/4
3 1/2
3 3/4
4
3 1/4
3 1/2
3 3/4
4
4 1/4
3 1/2
3 3/4
4
4 1/4
4 1/2
3 3/4
4
4 1/4
4 1/2
4 3/4
4
4 1/4
4 1/2
4 3/4
5

USE ONLY 4 BLADE SPACERS MAXIMUM

1. To quickly achieve small changes in cutting
heights, move the spacers from under the cutter
housing to above the cutter pulley. (Each spacer
moved will give an additional 1/4" of cutting
height ).
8

Setup & Adjustments
BRAKE / TRACTION ADJUSMENT

OPERATOR PRESENCE SWITCH ADJUSTMENT
The operator presence switches can be adjusted by loosening the screws on the back side
of the console and sliding the switch left or right.
The O.P. switch plunger should just come in
contact with the O.P. lever when the operator
presence levers are released.

1. Disconnect the brake linkage from the brake
band arm.
2.With the mower in gear, place the drive levers
in the drive position. Firmly pull back on the
handles until the tires slide to seat the drive
belts into the pulleys.

BLADE SWITCH ADJUSTMENT
The blade engagement switch can be adjusted
by loosening the screws on the blade engagement bracket and moving the switch up or
down. The blade switch should be adjusted so
the plunger is fully depressed when the engagement lever is fully disengaged.

3. Measure the distance between the back drive
lever slot and the neutral bail. It should be
between 3/16 and 1/4" but not exceeding 1/4".
See Figure #3.
4. If the clearance is less than 3/16”, disconnect
the drive lever from the idler arm by removing
the retaining ring.

ADJUSTMENTS - DRIVE BELTS
For all drive belts, tension should be set so that
belt vibration is minimized or eliminated when
belts are moving during normal operation. A
properly tensioned belt should have 1/4" to 3/8"
deflection at the center of belt span between
pulleys when blades are engaged.
Blade drive belt tension is preset at the factory.

5. Adjust the drive linkage to the proper clearance by screwing it into the yoke at the drive
lever end of the linkage. This will achieve proper
clearance if the distance is less than 3/16”.
Screw the linkage out if it is greater than 1/4".

NOTE:
DO NOT over tighten belt. Excessive tension
will decrease belt and spindle bearing life.
BLADE DRIVE BELT ADJUSTMENTS
WARNING
BEFORE PERFORMING ADJUSTMENTS
ON BLADE BELT, TURN MOWER OFF,
CLOSE FUEL VALVE, AND DISCONNECT
SPARK PLUG WIRE.
1. Remove front deck belt shield.
2. Loosen whiz nut on turnbuckle.
3. Set belt tension when engagement lever is in
the engaged position.
4. To increase belt tension rotate turnbuckle
toward the rear of the mower until desired
tension is gained. Do not over tighten belts, to
much tension will reduce belt and spindle
bearing life. See figure # 6
5. Tighten whiz nut on turnbuckle and install belt
shield.

Figure 3
NOTE:
More or less brake pressure may be desired
depending on the operator or conditions of
operation. To increase pressure tighten the
wing nut on the brake linkage.
9

AUXILIARY BLADE DRIVE BELT
(48" MODELS ONLY)
To adjust tension of the auxiliary belt rotate nut
on linkage that is attached to deck strap located
on the right side of cutter deck. See Figure 6.

BLADE ENGAGEMENT LEVER
The blade engagement lever needs to be
adjusted so the lever does not come in contact
with control panel when the lever is in the off
position.

TRANSMISSION DRIVE BELT
To increase the tension of the transmission belt,
loosen the nut on the underside of the transmission idler pulley located under the rear deck,
slide the idler assembly inward to increase
tension and tighten the nut to secure. See
figures 4 & 5.

To adjust, remove the clevis pin from the yoke
and adjust by turning the yoke. The clevis pin
connects the blade engagement lever to the
yoke, and the yoke is connected to the blade
engagement rod that runs to the bellcrank on
the rear deck.

BELT GUIDES
Belt guides under rear deck are adjusted as
shown in figures 4 and 5
NOTE: The blades should come to a stop
from maximum speed within 7 seconds after
disengaging.
36" MODEL

48" MODEL
1/4" CLEARANCE

1/2" 102036

1/8" CLEARANCE
103462
TRANSMISSION BELT

ENGINE PULLEY

1/2" 102036

103462
TRANSMISSION BELT

ENGINE PULLEY
103463

103462
1/8" CLEARANCE

1/8" CLEARANCE
TRANSMISSION IDLER PULLEY

TRANSMISSION IDLER PULLEY

Figure 5

Figure 4

10

AUXILARY BELT ADJUSTMENT ROD

TURNBUCKLE

1/4"

IDLER PIVOT POINT

ENGAGEMENT IDLER ASSEMBLY
Figure 6

BEFORE OPERATING
Be thoroughly familiar with all controls and how
to use them before operating the mower. Know
beforehand how to stop the engine, drive
wheels, and mower blades in preparation for
possible emergency.

PRE-START CHECKLIST
Make the following checks and perform the
services as required before each start up.
1. If required make cutting height adjustments
and drive linkage adjustments. Refer to pages 6,
7, and 8
2. Check tires for proper inflation (front caster
tire pressure to be 50 lbs max. / rear tire pressure to be 14 lbs max.
3. Check guards, deflectors, and covers to
make sure all are in place and secure.
4. Check blade belts for wear and correct
tension if worn or damaged, replace with original
part.
5. Clean interior and exterior surfaces of the
cutting deck and clean engine of any accumulation of dirt or debris. Keep engine air intake clear
at all times.
6. Check engine oil add if needed (do not overfill)
refer to engine manual for oil specs.
7. Add fuel to tank after pushing the mower
outside where fumes can dissipate. Make sure
cap is tight after refueling.

EMERGENCY STOP
Pull both drive levers firmly against handle grips
and hold them securely in place. Use thumbs to
lift the neutral bail up into the neutral slot. Then
stop engine by pulling throttle control back and
shut off the key switch. See figure # 7.
NORMAL OPERATING STOP
1. Pull both drive levers firmly toward the handle
grips to stop forward motion.
2. Use thumbs to lift neutral bail into the neutral
slots.
3. Move the throttle control to the slow position.
4. Move blade engagement lever to the off
position.
5. Move shift lever to the neutral position.
6. Stop engine by turning the key switch to the
off position.

NOTE
DO NOT ADD FUEL WHILE ENGINE
IS RUNNING OR WHILE ENGINE IS HOT.

NOTE
CLOSE FUEL VALVE AT THE END OF
EACH MOWING JOB !!
11

STARTING AND OPERATING
ENGINE: START ENGINE AS FOLLOWS:
1. Move blade engagement lever to the off
position so the interlock will allow engine to
start.
2. Check gear shifter to be sure it is in the
neutral position.
3. While on level terrain, squeeze both drive
levers and lift up on the neutral bail to lock it into
the neutral lock position.
4. Open fuel shut-off valve
5. Set throttle control all the way forward to the
choke position.
6. Pull starter rope until engine starts.
7. Warm engine momentarily, then move the
throttle control out of the choke position until
engine runs smoothly, approximately 1/2 throttle.
Engage the blades and set the desired rpm.
The best cutting and bagging is obtained with
engine at or near top rpm.
NOTE: DO NOT engage the blades at full
rpm. To extend belt life engage and disengage belts at 1/2 throttle.
8. Depress one operator presence lever and
shift transmission to the desired gear.
9. Unlock the drive levers by pushing the neutral
bail down out of the neutral slots. Slowly release
both drive levers at the same time to begin
forward motion.
10. The steering system of this mower uses
individual right and left drive levers on the handle
bars. Squeezing the drive lever will reduce
tension on the wheel drive belt eliminating power
to that wheel. With the opposite wheel still
under power a turn is accomplished. If the drive
lever is squeezed even tighter the brake will be
applied to that wheel and a tighter more abrupt
turn is accomplished. - turn left by squeezing
the left hand drive lever or turn right by squeezing the right hand drive lever. If you squeeze
both levers the mower will stop. See figure to
right of page.

12

SERVICE

SERVICE ASSISTANCE REPLACEMENT PARTS
To retain the quality of your mower, use genuine
HUSQVARNA replacement parts only. Contact
your local HUSQVARNA dealer for parts and
service assistance. For the correct part or
information for your particular mower, always
mention model and serial number. We recommend returning your mower to an authorized
HUSQVARNA dealer on a yearly basis for
inspection and addition of any new devices
which might upgrade the performance and
safety of your mower. For engine parts and
service, look in the yellow pages for the engine
manufacturer's dealers under the heading
engines - gasoline.

3. Engine must not start unless blades are off
and transmission is in the neutral position.

WARNING
BEFORE PERFORMING SERVICE ON THE
MOWER TURN ENGINE OFF, CLOSE THE
FUEL VALVE, AND ALLOW ENGINE TO
COOL. DISCONNECT THE SPARK PLUG
WIRE. IF THE MOWER IS TO BE RAISED
OR TILTED, MAKE SURE TO SECURE THE
MOWER IN PLACE.

BLADES
If blades are in good condition, sharpen at an
angle of 22 to 28 degrees about 2-1/2" in from
the tips.

4. Do not operate the mower if the interlock
safety system allows operating or starting in any
unsafe condition.
CAUTION
DO NOT BYPASS THE INTERLOCK SWITCHES
THEY ARE FOR YOUR PROTECTION! CHECK
THE OPERATOR PRESENCE SYSTEM DAILY
ALONG WITH THE TRACTION DRIVE SWITCHES
AND BLADE SWITCH FOR PROPER OPERATION.
REPAIR IMMEDIATELY IF A
PROBLEM IN THE SYSTEM IS FOUND. DO NOT
OPERATE MOWER IN A DAMAGED CONDITION.

NOTE
AFTER SHARPENING, CHECK BLADES FOR
PROPER BALANCE, IF NEEDED CORRECT BALANCE TO PREVENT EXCESSIVE VIBRATION

NOTE
ALL MOWERS SHOULD BE TILTED WITH
THE CARBURETOR SIDE UP

CUTTING DECK SERVICE
If mower is cutting improperly, check the following:
1. Ground speed - too fast for proper cutting.
Shift to a lower gear.

MODULE SYSTEM
The interlock modules function is to prevent the
engine from starting if the blade and/or traction
systems are engaged. It also causes engine
shutdown if the operator falls from, or attempts
to leave the operator position while the blades or
traction drives are engaged. After the engine
starts, the operator must hold either the left or
right O.P. lever down before engaging the
blades or shifting the transmission into gear. If
neither O.P. lever is held the engine will stop.

2. Engine speed - Increase engine speed.
3. Cutting height - too low for ground/grass
conditions. Adjust to higher cut.
4. Blade spacers - not positioned properly on all
blade shafts. Visually inspect and replace or
adjust as necessary.
5. Front casters - spacers not in correct relationship with rear axle. Adjust as necessary.

INTERLOCK SAFETY SYSTEM
Check the function of the safety electrical
system on a regular basis.

6. Belt slippage - causing bad cutting pattern or
uneven cut. Adjust belt tension

1. Engine must kill if blades are engaged without
O.P. levers held down.
2. Engine must kill if transmission is taken out of
neutral without holding down O.P. levers.

7. Tire pressure - uneven tire pressure can
cause an uneven cut from one side of the deck
to the other. Equalize tire pressure.
13

CUTTER HOUSING SPINDLE ASSEMBLIES
The cutter housing assembly is designed with a
slip fit inner race and pulley. The sole purpose
of the setscrew in the pulley is to hold the
housing assembly together. The setscrew is
not meant to secure the pulley. The pulley is
secured by pinching the pulley to the inner race
of the bearings using the blade bolt and nut.
Tighten the setscrews after you have pinched
the assembly together with the blade bolt and
nut.
Each cutter spindle on 48" Models have a
different stack up of spacers and pulleys, to
achieve proper belt alignment. The left cutter
spindle on 48" Models is the same as 36"
Models. See figure #8 (Refer to the parts
manual when ordering parts.)

Cutter housing assemblies use sealed bearings
and are maintenance free.

NOTE
WHEN PRESSING A BEARING IN OR OUT
OF A CUTTER HOUSING APPLY CONSTANT
PRESSURE TO THE RACE OR RACES
THAT HAVE AN INTERFERENCE FIT.
NEVER BEAT A BEARING IN OR OUT.

14

WHEEL DRIVE BELT REPLACEMENT
WHEEL DRIVE BELT: If belts are worn or
damaged, wheels will not drive properly. To
replace either belt, proceed as follows:

AUXILIARY BELT REPLACEMENT
(48" MOWERS)
1. Loosen the auxiliary belt adjusting rod. To
relieve tension on the belt. See figure 6 on page
11.
2. Remove belt guides from the center spindle.
3. Remove belt.
4. Reverse procedure for replacement. Adjust
belt to proper tension.

1. Unhook brake linkage from brake band arm.
Located between the rear deck and the rear tire.
2. Unhook traction linkage from bellcrank. The
traction linkage connects the traction levers on
the handle to the bellcranks on each side of the
mower. The bellcranks are located behind the
rear tires.
3. Unhook spring from belt guard. Located on
the sides of the tank support.
4. Remove belt guard.
5. Loosen bellcrank pivot and belt guard mounting bolts, slide spacers off of bolts to gain
clearance for belt removal.
6. Remove belt.
7. To replace belt reverse the procedure and
make any needed adjustments.

TRANSMISSION BELT REPLACEMENT
(36" & 48" MOWERS)
1. Blade drive belt must be removed from
engine pulley before transmission belt can be
removed. See blade drive replacement, use
steps 4, 5, and 6. Also see figures 4 and 5 on
page 10.
2. Loosen nut on the transmission idler pulley
and slide pulley in slot to relieve tension on belt.
3. Remove the belt from the transmission pulley
and the engine pulley.
4. Reverse the procedure for replacement.

BLADE DRIVE BELT REPLACEMENT
(36" & 48" MOWERS)
BLADE DRIVE BELT: If the belt is worn or
damaged, blades will not drive properly. To
replace this belt, proceed as follows:
1. Close fuel tank shut-off valve and remove
spark plug wire.
2. Remove the belt cover from the mower deck.
3. Loosen the snubber bolt on the engagement
idler so belt can be removed. The engagement
idler is located on the front deck towards the
rear. See figure 6 on page 11.
4. Raise the rear of mower and block up the
rear tires to gain access to the underside of rear
deck.
5. Remove the rear belt shield from the underside of rear deck.
6. Loosen the engine bolts with belt guides and
rotate them away from the engine pulley. Belt
guides can be seen in figures 4 and 5 on page
10.
7. Loosen the belt guides located around the
pulleys on the front deck. Belt guides are 5/16"
bolts and must be loosened to remove the belt.
8. Remove belt.
9. To replace belt - reverse the procedure and
make any needed adjustments to belt guides or
belt tension.

WINTER STORAGE
To prepare your Husqvarna mower for winter
storage, perform the routine maintenance and
necessary adjustments and record the part
numbers of worn or broken parts so they may
be ordered and replaced before the next mowing season. Use only authentic Husqvarna
replacement parts to insure proper fit and the
safety of your mower is maintained.
Treat the fuel in the tank with a fuel stabilizer
(such as STA-BIL). This will minimize the
formation of fuel gum deposits during storage.
Read and follow the mix ratio on the container.
Run the engine for at least 10 minutes after
adding the stabilizer to bring it into the carburetor.
These few tips will help make your mower ready
when needed for the next mowing season and
insure many years of dependable service.

15

Maintenance Chart
ITEM

FREQUENCY

REQUIRED SERVICE

Rear Tires ........................................ Before Each Mowing .................... Inflate to Proper Pressure
Front Tires ........................................ Before Each Mowing .................... Inflate to Proper Pressure
Underside of Mower Deck ................ After Each Mowing ....................... Remove Grass & Debris
Mower Deck ..................................... Daily ............................................. Inspect Hardware/Damage
Underside of Rear Deck ................... After Each Mowing ....................... Remove Grass & Debris
Blade Pulleys.................................... When Removed ........................... Loctite to Shaft
Engine Pulley.................................... When Removed ........................... Anti-seize to Shaft
Front Wheel Bearings ...................... Daily ............................................. Lube With Grease
Caster Shafts ................................... Daily ............................................. Lube With Grease
Engine Oil Level ............................... Daily ............................................. Fill as Needed
Rear Wheels .................................... Daily ............................................. Lube With Grease
Brake Arms ...................................... Daily ............................................. Lube With Grease
Engagement Bellcrank ..................... Daily ............................................. Lube With Grease
Transmission Shafts ........................ Weekly ......................................... Lube With Grease
Blades .............................................. Weekly ......................................... Replace if Damaged
Engine Air Filters .............................. Every 25 Hours............................. See Engine Manual
Engine Oil Change ........................... Every 100 Hours ........................... See Engine Manual
Linkages & Adjustments ................... 100 Hours ..................................... Inspect/Replace Worn Parts
Fuel Filter ......................................... 100 Hours ..................................... Replace With New
Winter Storage ................................. End of Season.............................. See Section on Storage
Drive Wheel Idler Arms ..................... Daily ............................................. Lube With Grease

16

Model Number:
Serial Number:
Date of Purchase:
Dealer Information:
Notes:

17



---

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Modify Date                     : 2005:01:18 11:07:38+01:00
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Creation Date                   : 2001:09:26 14:58:35Z
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Metadata Date                   : 2005:01:18 11:07:38+01:00
Description                     : 
Title                           : OM, W 3613 ETS/ W 4815 ETS, 2001-09, Walk Mower (Turf Care)
Creator                         : Husqvarna

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