Husqvarna ZTHKH4818A, ZTHKW4818A, ZTHKH4820A, ZTHKW4821A, ZTHQL4221A User Manual

Operators manual

Models:

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

MANUAL NO. 539105116 REV. 03 (12/13/00)

968999157 / ZTHKH4818A
968999158 / ZTHKH4820A
968999168 / ZTHKW4818A
968999169 / ZTHKW4821A
968999170 / ZTHQL4218A
968999172 / ZTHQL4221A

Congratulations on the purchase of your Husqvarna mower. This manual has been prepared

for the owners and operators of the Zero Turn Small Frame 48" commercial mowers. Read,
understand and follow the safety and operating instructions.

! W ARNING

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, 7349 S tatesville Road, Charlotte, NC, 28269
or call: 1-800-HUSKY -MD.

WARNING: Engine exhaust, some of it’s constituents, and certain vehicle componets

contain or emit chemicals known to the State of California to cause cancer and birth

defects or other reproductive harm.

WARNING: Battery posts, terminals and related accessories cont ain lead and lead

compounds, chemicals known to the State of California to cause cancer and

birth defects or other reproductive harm. Wash hands af ter handling.

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

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SAFETY:

1. Training

2. Preparation

3. Operation

4. Transportation

5. Maintenance

SETUP AND ADJUSTMENTS:

1. Park brake

2. Cutting height

3. Mower deck leveling

4. Front deck belt routing

5.Throttle lever tension

6. Reverse spring detent adjustment

7. Motion control linkage adjustment

OPERATING INSTRUCTIONS:

1. Controls

2. Starting and operation

TABLE OF CONTENTS

MAINTENANCE:

1. Engine oil level

2. Pump compartment

3. Mower blades

4. Safety interlock system

5. Hardware

6. Air cleaner

7. Engine oil

8. Hydraulic oil

9. Tire pressure

10. Battery
1 1. Belts

12. Lubrication

13. Fuel filter

14. Hydraulic filter and oil

TROUBLE SHOOTING:

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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(s) 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 up and down 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 and set park brake 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. It is designed for the operator only.
Keep others away from the mower when in operation.

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SAFETY

TRANSPORTATION:

Use a heavy duty trailer to haul mower. Set park brake, turn off fuel valve and strap mower to
trailer . NOTE: Park brake will not hold mower in place when transporting. Be sure to tie down the
mower to the trailer . Always back onto the trailer to prevent possible tipover .

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. T o 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 drive wheels using the four lug nuts installed on the hub.

3. Check tire pressure in all four tires. Pressure for all four tires is 15 psi

4. Remove the motion control levers and install on the inside of the control arms (See figure 1).
Align the levers so they are even in the neutral position. (See figure 6)

5. Install seat lanyard to the seat frame with 5/16" hardware. Seat lanyard is located under the
seat in the hydraulic pump area. Attach the lanyard to the left front seat stud on the seat frame.

6. Check engine oil with dip stick. Add if needed per engine manufactures specifications. (See
Kawasaki engine manual for engine specifications.)

7. Loosen the discharge chute slightly and lower into position. Chute should be snug but still
pivot freely .

Figure 1

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ADJUSTMENTS

P ARK BRAKE:

1. Stop engine and remove key. While the park brake lever”A” is in the on position. The distance
between the swivel”C” and the bolt head”B” should be 3/8” to 1/2” approximately.(See Fig. 2)

2. If adjustment is needed, using two 1/2” wrenches, loosen the nut”F” above the turnbuckle”G”
while holding the turnbuckle”G” from turning. After the nut”F” is loose and out of the way . While
holding the bolt head”B” from turning. Turn the turnbuckle”G” the proper direction to lengthen the
distance or to shorten the distance. After the proper distance is obtained retighten the nut”F”
against the turnbuckle”G”.

3. While the park brake lever”A” is still in the on position, measure the length of the spring”D”.
Should measure 2”.(See Fig. 2)

4. If adjustment is needed loosen or tighten the nut”E” below the spring”D”. While holding the
turnbuckle”G” to keep the assembly from turning.

FIGURE 2

CUTTING HEIGHT:

1. Stop the mower and disengage the blades.

2. Raise the deck height lever to the transport position.

3. Remove the height adjustment pin and place it in the desired cutting height hole. Move
deck height lever down onto the pin and mow. NOTE: anti-scalp rollers must be in the proper
position for maximum deck floatation. See the decal on the front deck.

MOWER DECK LEVELING:

1. Position mower on a flat surface and stop engine.

2. Check the tire pressure of all four tires. Inflation should be 15 psi.

3. Place two 2x4’s on edge under the cutting deck from front to rear and lower the deck down
onto the 2x4’s.

4. Adjust the four upper chain bolts “H” to the center of the slot in the deck lift arms (See Fig 2).
NOTE: make sure deck lift blocks are tightly bolted to the frame .

5. Check chains for equal tension. If unequal, adjust upper chain bolt in slot.

6. Place deck in the 5" cutting height and measure from the cutting edge of the blade to a flat
surface to check deck cutting height.

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