Husqvarna ZTHKH4818A, ZTHKW4821A, ZTHKW4818A, ZTHKH4820A, ZTHQL4221A manual Problem Possible Causes

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TROUBLE SHOOTING

PROBLEM

 

POSSIBLE CAUSES

 

 

 

 

 

 

 

Engine won’t start

 

1. Blade switch on.

 

 

2. Drive levers not in the neutral slots.

 

 

3. Operator not in seat.

 

 

4. Park brake disengaged.

 

 

5. Dead battery or cable off.

 

 

....(Ignition switch left on)

 

 

6. Fuel valve closed or in the wrong position.

 

 

7. No fuel.

 

 

8. Spark plug wires off.

 

 

9. Bad spark plugs.

Mower will not move

 

1. Park brake on.

or moves slowly or hard

 

2. Pump bypass valves open.

 

 

3. 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. Clutch unhooked from harness.

 

 

3. Blade switch failure.

 

 

4. Fuse burnt out.

 

 

 

Uneven cut

 

1. Tire pressure uneven. (15 psi all tires)

 

 

2. Blades bent (check tip to tip one blade thickness)

 

 

3. Air foil of blade worn or bent.

 

 

4. Deck not level.

Cut is ragged

 

1. Blades dull.

 

 

2. Ground speed too fast.

 

 

3. Grass accumulation under deck.

 

 

 

Mower moves when

 

1. Motion control linkage out of adjustment.

in neutral position

 

2. Pump arms loose or out of adjustment.

 

 

3. Park brake out of adjustment.

 

 

 

Mower pulls left or right

 

1. Tire pressure uneven.

 

 

2. Motion control linkage adjustment.

 

 

3. Soft terrian.

 

 

4. Slope too steep.

 

 

 

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

For example, no fuel or battery disconnected when the engine will not start.

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Contents Operators manual Technical Assistance Setup and Adjustments Table of ContentsSafety Maintenance Trouble ShootingOperation Safety TrainingPreparation Safety Transportation Equipment Setup and AdjustmentsMower Deck Leveling Adjustments Park BrakeCutting Height Throttle Lever Tension AdjustmentsReverse Spring Detent Adjustment Left side cut away view Adjustments Motion Control Linkage Adjustment Operating Instructions ControlsOperating Instructions Starting and Operation Maintenance Maintenance Problem Possible Causes Wiring Diagram Service Record

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