Husqvarna Wh3614A Users Manual OM, WH 3614/ 3615/ 4817, 2001 02, Walk Mower (Turf Care)

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Operators manual

MANUAL NO. 539104754 REV. 02 (2/22/01)

Models:

968999105 / WH3614A
968999111 / WH3615A
968999106 / WH4817A

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.

Congratulations on the purchase of your Husqvarna mower. This manual has been prepared
for the owners and operators of the 36" and 48” walk-behind hydro commercial mowers. Read,
understand and follow the safety and operating instructions.

! WARNING
Failure to follow cautious operating practices can result in serious injury to the operator or other
persons. The owner must understand these instructions, and must allow only trained 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.

! CAUTION
1. Keep all shields, guards and safety devices in place and in proper working condition.
2. Stop engine and remove spark plug wires or remove key before adjusting, servicing, or performing maintenance.

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.

WARNING

Continuous dedication to improve our products require that specifications and design are subject to change without notice.

2

TABLE OF CONTENTS
SAFETY:
MAINTENANCE:
1. Training
1. Engine oil level
2. Preparation
2. Pump belt
3. Operation
3. Mower blades
4. Transportation
4. Safety interlock system
5. Maintenance
5. Hardware
6. Air cleaner
SETUP AND ADJUSTMENTS:
7. Engine oil
1. Cutting height
8. Hydraulic oil
2. Motion control linkage
9. Tire pressure
3. Reverse spring detent
10. Belts
4. Blade belts
11. Lubrication
5. Engine belt guides
12. Fuel filter
6. Pump belt
13. Hydraulic filter and oil
7. Safety interlock system
14. Cutter housing
OPERATING INSTRUCTIONS:
1. Controls
2. Starting and operation

TROUBLE SHOOTING:

3

SAFETY
TRAINING:
1. Read this manual carefully and question your dealer if something is not clear.
2. Be thoroughly familiar with the controls and proper use of the equipment.
3. Never allow children, teenagers, or people unfamiliar with these instructions to use the
mower.
4. Do not mow while people, particularly children, or pets are nearby.
PREPARATION:
1. The use of personal protective equipment such as (but not limited to) protection for the
eyes, ears, feet and head is recommended.
2. Never operate the mower without proper guards, covers, safety switches and devices in
place and properly functioning. Inspect these items daily for their condition and proper operation. If the condition or operation of any of these devices is questionable they must be
replaced or repaired before using the mower.
3. Thoroughly inspect the area to be mowed and remove all stones, sticks, wire and other
debris that may be thrown by the mower. Also note or mark other obstacles such as holes,
stumps, etc..
4. Do not operate the mower when barefoot or wearing open shoes. Always wear substantial
footwear and long pants.
5. Fill gas tank before starting mower. DO NOT SMOKE near gasoline containers. Do not fill gas
tank indoors or when engine is hot or running. Clean off any spilled gasoline before starting the
mower.
OPERATION:
1. Mow only in daylight or good artificial light.
2. Do not operate the mower in wet grass if possible.
3. Mow across slopes. Use extreme caution when mowing or turning on slopes. Always turn to
the downhill side. Do not mow excessively steep slopes ( mower may tip over and cause
injury or death ).
4. Use caution when backing up.
5. Stop the blades when crossing surfaces other than grass; or when traveling to and from
the area to be mowed.
6. Never operate the mower with defective, broken or excessively worn parts. Keep all
guards, shields, and safety devices in place and in proper working order.
7. Do not change the engine governor settings or over speed the engine. Operating the
engine at excessive speeds will increase the hazard of injury and can severely damage your
machine.
8. Keep hands, feet and clothing away from rotating parts when operating mower.
9. Stop the blades and engine before leaving the operators position for any reason.
10. Never make adjustments to the mower while engine and/or blades are running.
11. After striking a foreign object, stop mower and remove key. Inspect the mower for any
damage and repair it immediately before continuing to mow.
12. Never operate this equipment in an enclosed or confined area without proper ventilation
of the engine exhaust.
13. Do not allow any passengers to ride on the mower. Keep others away from the mower when
in operation.

4

SAFETY
TRANSPORTATION:
Turn off fuel valve and strap mower to trailer.
MAINTENANCE:
1. Keep all nuts, bolts and screws tight to keep mower in safe operating condition.
2. Engine maintenance should comply with engine manufactures specifications. See the engine
manual for specifications.
3. Never store the mower with gas in the tank inside a building where fumes can reach an open
flame or spark.
4. To reduce the risk of fire, keep the mower free of grass, leaves and excessive grease or oil.
5. Have your mower inspected and serviced each year by an authorized Husqvarna dealer.
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 can be purchased
from your Husqvarna dealer.
8. The hydraulic system including all hoses and fittings should be checked frequently for wear or
leaks. Never check for leaks with your hands, use a piece of cardboard or wood. Hydraulic oil
under pressure could be injected into your body and must be surgically removed within a few
hours.
EQUIPMENT SETUP AND ADJUSTMENTS
1. Uncrate mower
2. Mount front caster assemblies to the front deck using the fasteners provided on the deck (both
sides).
3. Cut the plastic wire ties holding the operator presence levers down.
4. Check tire pressure in all four tires. (rear tires 15 PSI, front tires 20-25 PSI)
5. Check engine oil with dipstick. Add if needed per engine manufactures specifications. (See
engine manual)
6. Check hydraulic oil level. Should be an 1.0” below the bottom of the fill tube.
7. Mount the discharge chute to the front deck using the fasteners provided on the deck.
CUTTING HEIGHT
1. Before changing cutting heights make sure the blades are off, key switch is off, and remove
spark plug wire or wires.
2. Cutting height ranges from 1 1/2” to 5” in 1/4” increments.
3. Cutting height can be changed three ways. Move one “C” spacer on the front casters,
change the blade spacers, or move the wheel motor assemblies.
4. a. To change heights on the rear deck loosen, do not remove, the top two carriage bolts on
both sides. (see fig. 1a)
b. Place a jack under the center of the rear deck remove the bottom two nuts on both sides.
Then remove the bottom two bolts both sides. (May have to raise the jack slightly to remove
bolts.)(see fig. 1b)
c. With the jack raise or lower the rear deck to the desired position using the chart, on page
7, to ensure proper height.

5

d. Reinstall the bottom two bolts on both sides.(A tapered punch may be needed to help align
the holes.)
e. Retighten all four bolts both sides and remove jack.
5. Using the chart(on page 7), find the correct number of spacers to be placed under the caster
swivel.(see fig. 2)
NOTE: To achieve the best quality cut, the blades should be level with the ground or slightly tipped
forward.
REAR DECK ADJUSTMENT

CARRIAGE BOLTS(a)

POSTION A
POSTION B
POSTION C

(b)
Figure 1
CASTER HEIGHT ADJUSTMENT

MACHINERY BUSHING
1/2" ”C”- SPACERS

CASTER
SWIVEL

Figure 2

6

CUTTING HEIGHT ADJUSTMENT CHART
AXLE
POSITION

NUMBER OF
SPACERS BELOW
CASTER ARM

NUMBER OF 1/4" BLADE SPACERS
UNDER CUTTER HOUSING
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

4
C
5

Note: 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 ).

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

USE ONLY 4 BLADE SPACERS MAXIMUM

MOTION CONTROL ADJUSTMENT
1. This adjustment must be made with the drive wheels rotating. Raise rear of the unit and block it
up so the wheels are free to rotate. CAUTION: Keep hands, feet and clothing away from rotating
tires.
2. It will be necessary to make this adjustment with the reverse detents disconnected.
3. With the ground speed lever in neutral or stop position, start the engine.
4. The thumb latches should be unlocked.
5. Turn the adjusting nut the proper direction until the wheel stops rotating. This is your neutral
position, repeat on other side. (see fig. 3)
6. After the neutral position is adjusted. You will need to readjust the short linkage. (see fig. 3)
7. Remove the two hairpins, swing the linkage out of the control lever and the thumb latch.
(see fig.3)
7

8. Turn the short linkage the proper direction in the swivel, so that when the thumb latch is engaged
the wheel doesn’t turn (or it is in neutral). Reinstall the hairpins and repeat on other side.
(see fig. 3)
9. After these adjustments have been made it will be necessary to adjust the reverse detent. (See
reverse spring detent adjustment)

Figure 3
REVERSE SPRING DETENT ADJUSTMENT
1. To check if your reverse spring detent adjustment is set right. Make sure your ground speed
lever is pulled back to the neutral position. Release the thumb latches (both sides) and pull up on
the control levers at the same time. Then release the levers, it should return to neutral. If it does not,
the following adjustments need to be made.
2. Stop engine and remove key.
3. Ground speed lever should be in the neutral or stop position and the thumb latches unlocked.
4. Loosen the two 1/4” bolts holding the reverse detent bracket. Slide the bracket up or down till it
just touches the “L” shape stop under the console. Holding the bracket against the stop retighten
the two 1/4” bolts. (Repeat on other side if needed.)
(see fig. 4 )

Figure 4
(Right side cut away view of console.)
8

BLADE DRIVE BELT ADJUSTMENT
1. Before performing adjustments on blade belt, turn the mower off and disconnect spark plug wire
or wires.
2. Remove front deck belt shield.
3. Loosen nut on turnbuckle.
4. Set belt tension when blade engagement lever is in the engaged position.
5. 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 fig. 5)

AUXILIARY BLADE BELT
1. Before performing adjustments on blade belt, turn the mower off and disconnect spark plug wire
or wires.
2. To adjust tension on the auxiliary belt rotate nut on linkage that is attached to deck strap located
on the right side of cutter deck. (see fig. 5)

TURNBUCKLE

AUXILARY BELT ADJUSTMENT
ROD

1/4"

IDLER PIVOT POINT

ENGAGEMENT IDLER
ASSEMBLY

Figure 5

9

ENGINE BELT GUIDES
1. Before performing adjustments on belt guides, turn the mower off and disconnect spark plug wire
or wires.
2. Belt guides under the engine should be adjusted as shown in figure 6.

Figure 6
PUMP BELT
1. Before performing adjustments on pump belt, turn the mower off and disconnect spark plug wire
or wires.
2. Check tension on the belt. If it feels loose adjustment will need to be made.
3. Loosen the nut on the bottom of the idler pulley.
4. Slide the idler pulley against the belt, retighten the nut while applying pressure to the idler
pulley. (see fig. 6)
INTERLOCK SAFETY SYSTEM
The interlock modules function is to prevent the engine form starting if the blade and/or ground
speed lever are engaged. It also causes engine shutdown if the operator falls from, or attempts to
leave the operator position while the blades or ground speed lever are engaged. After the engine
starts, the operator must hold either the left or right O.P. lever down before engaging the blades or
moving the ground speed lever. If neither O.P. lever is held the engine will stop. Check the function
of the safety electrical system on a regular basis.
1. Engine must kill if blades are engaged without O.P. levers held down.
2. Engine must kill if ground speed lever is taken out of neutral without holding down O.P. levers.
3. Engine must not start unless blades are off and ground speed lever is in the neutral position.
4. Do not operate the mower if the interlock safety system allows operation or starting in any unsafe
condition.

10

OPERATING INSTRUCTIONS
CONTROLS:
1. Be thoroughly familiar with all controls their function and how to operate them before
operating the mower.
2. Control levers: Located on each side of the handle control direction of movement. The left lever
controls the flow of oil from the left hydro pump to the left wheel motor. The right lever controls the
flow of oil from the right hydro pump to the right wheel motor.
3. Ground speed lever: Located in the center of the console. Controls the forward speed of the
mower. Push the lever forward if you want to go faster, pull it back to go slower or pull it all the way
back to the neutral or stop position.
NOTE: To begin motion the operator must move the ground speed lever forward before disengaging the thumb latches. After you release the thumb latches allow the control levers to move
forward at the same time. The mower will move in a straight line in that direction.
Movement of the right control lever forward will cause the right wheel to rotate in a forward direction. Movement of the left control lever forward will cause the left wheel to rotate in a forward
direction. To stop forward travel pull levers back into the neutral position.
To turn right while moving in a forward direction pull the right control lever back towards the
neutral position, this will slow the right wheel and cause the mower to turn in that direction.
To turn left while moving in forward direction pull the left control lever back towards the neutral
position, this will slow the left wheel and cause the mower to turn in that direction.
4. Blade engagement lever: Located on the left side of the console. To engage the blades push
the lever all the way forward and to disengage the blades pull the lever back against the console.
5. Choke and throttle control: Located on the right side of the console. Push the throttle control all
the way forward for choke. Use when starting cold engine do not run choke when engine is warm.
Use the throttle to control the engine RPM.
6. Tracking knob: Located on the left back side of the console. If the mower will not travel in a
straight line on a smooth surface, turn the tracking knob the proper direction until it straightens
out.
7. Key switch: Located on the console. The key switch must be turned on, blades disengaged,
and ground speed lever in neutral before starting.
8. Fuel shut off valve: Located under the fuel tank.
9. Pump release valves: Located at the back left corner of the pumps. Used to release the system so unit may be moved by hand when not running. NOTE: Only rotate about a 1/4 to 1/2 of a
turn to release system.
10. Operator presence levers: Located on the handle. One or both levers must be pressed against
the handle for the mower to remain running, when the blades are engaged or the ground speed
lever is not in the neutral position.
11

OPERATING INSTRUCTIONS
STARTING AND OPERATION:
1. Making sure the blades are disengaged, ground speed lever in neutral, the thumb latches
locked, and the fuel valve on.
2. Adjust throttle to choke (if needed) turn key to on position.
3. Pull start the engine. Once the engine is running adjust the throttle.
4. Holding down at least one of the operator presence levers, engage blades and set RPM to
maximum, but not choked. NOTE: Be sure all persons are clear of area before engaging the
blades. To prolong spindle bearing and belt life engage and disengage blades at approximately
1\2 throttle.
5. Set the ground speed lever to the desired position.
6. Release the thumb latches at the same time.

MAINTENANCE
1. Engine oil level: Check daily with engine cold and on a flat surface. Remove the dipstick and
wipe clean. Reinsert the dipstick all the way, but do not screw down. Remove the dipstick and
check oil level. If oil level is low add oil. Use engine manufacturers specs for type of oil.
2. Pump drive belt: Stop engine and remove key. Check the tension on the belt.
3. Mower blades: Stop engine and remove key. Inspect blades and sharpen or replace as needed.
Check daily or more often if needed. The machine requires more power with dull blades and
gives a poor cut. If blades get bent, replace them. Blades shouldn’t have any notches from
hitting objects. The air foil on top of the blade should be sufficient to raise the grass for cutting. If
blades are in good condition, sharpen at an angle of 22 to 28 degrees about 2-1/2 inches in from
the tips. Note: After sharpening, check blades for proper balance, if needed correct balance to
prevent excessive vibration.
4. Safety interlock system: Check daily and never operate the mower if this system is not functioning properly.

12

MAINTENANCE
5. Hardware: Stop engine and remove key thoroughly inspect the entire machine for any missing
or loose hardware. Check daily.
6. Air cleaner: Stop engine and remove key. Remove plastic cover and loosen wingnut on the
air cleaner. Remove the foam pre-cleaner and wash or replace if needed. Inspect paper filter
and replace if dirty. Check every 25 hours, daily if in very dirty conditions. Fuel efficiency,
engine RPM, and available power goes down rapidly if the air filter is dirty. Prolonged effects
could damage the engine.
7. Engine oil: Change oil to manufacturers specifications. Stop engine and remove key. Drain
oil when engine is warm. Thoroughly clean around cap before removing. Remove oil
drain cap from the right side of engine block and replace drain cap. Remove oil filter and replace. Put a light coat of clean oil on the filter gasket before installing. Fill engine with oil using
manufacturers specs, see Kawasaki owner’s manual. Start engine and idle slowly to allow the oil
to recoat the interior of the engine and then inspect for leaks.
8. Hydraulic oil: Check daily. Thoroughly clean around cap. Remove cap. Oil level should be
1” below the bottom of the fill tube. If not, add oil. NOTE: Use only 20w - 50 motor oil.
9. Tire pressure: Check every 25 to 50 hours. Rear tires require 15 psi and caster tires 20 psi

10. Belts: Check every 25 hours. Stop engine and remove key. Check the condition of all belts.

12. Lubrication (every 25 hours):

Caster tires and front caster pivots

(Clean grease zerk thoroughly before greasing)
13. Fuel filter: Replace annually or as needed.
14. Hydraulic filter and oil: Change every 500 hours or yearly. Stop engine and remove key.
Clean around the filter and the drain plug on the bottom side of the tank. Remove the filter and
allow any oil to drain from the filter head. Then replace with new filter. Use only Husqvarna p/n
102606, filter which has a bypass valve and the correct micron filter. Remove one of the hydraulic
lines from the bottom of the tank and allow the tank to drain, reinstall the hydraulic line. Fill tank
with 20w - 50 motor oil 1” below the fill tube and replace cap. Block up the rear of unit until wheels
will rotate freely and start engine at a slow idle, move the control levers forward and run for
several minutes. Stop engine and recheck oil level. If wheels don’t response an air lock has
occurred within the hydraulic system. Bleed air from lines, or let stand overnight to allow the air
time to dissipate out of the oil. Retry responses & check the oil level. Note: Serious damage to
the pumps and wheel motors can occur if the system is ran with an air lock.

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 7 (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.

Figure 7
14

TROUBLE SHOOTING
PROBLEM

POSSIBLE CAUSES

Engine won’t start

1. Blade lever engaged.
2. Ground speed lever not in neutral.
3. Fuel valve closed.
4. No fuel.
5. Spark plug wires off.
6. Bad spark plugs.
7. Bad module.

Mower will not move
or moves slowly or with
difficulty

1. Pump bypass valves open.
2. Pump drive belt loose or off.
4. Hydraulic system failure.
5. Air in the hydraulic system.

Blades won’t engage

1. Blade belt off of pulleys.
2. Linkage unhooked or not adjusted.

Uneven cut

1. Tire pressure uneven.
2. Blades bent (check tip to tip one blade thickness)
3. Air foil of blade worn or bent.

Cut is ragged

1. Blades dull.
2. Ground speed too fast.
3. Grass accumulation under deck.

Mower moves when
in neutral position

1. Motion control linkage out of adjustment.
2. Pump arms loose or out of adjustment.
3. Short linkage out of adjustment.(see
motion control adjustment)

Mower pulls left or right

1. Tire pressure uneven.
2. Motion control linkage adjustment.
3. Soft terrain.
4. Slope too steep.
5. Tracking not adjusted.

When a problem occurs, do not overlook the simple causes.

15



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Metadata Date                   : 2006:05:22 08:36:14-04:00
Description                     : 
Title                           : OM, WH 3614/ 3615/ 4817, 2001-02, Walk Mower (Turf Care)
Creator                         : DRAGOO

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