Troubleshooting

Problem

 

Possible Cause

 

Corrective Action

 

 

 

 

 

Engine overheats.

1.

Engine load is excessive.

1.

Reduce the ground speed.

 

2.

Oil level in the crankcase is low.

2.

Add oil to the crankcase.

 

3.

Dirty air filter.

3.

Clean or replace the air cleaner element.

 

4.

Coolant level is low.

4.

Add coolant.

 

5.

Debris on or around radiator.

5.

Remove debris (see Clean the Radiator

 

 

 

 

section in Maintenance).

 

6.

Water pump or alternator belt is worn,

6.

Contact an Authorized Service Dealer.

 

 

loose, or broken.

 

 

 

 

 

 

 

Mower pulls left or right (with levers fully

1.

Tracking needs adjustment.

1.

Adjust the tracking.

forward)

2.

Tire pressure in drive tires not correct.

2.

Adjust tire pressure in the drive tires.

 

 

3.

Reverse indicator and motion control

3.

Adjust the reverse indicator and the

 

 

linkage need adjustment.

 

motion control linkage.

 

 

 

 

 

Machine does not drive

1.

By pass valve is not closed tight.

1.

Tighten the by pass valve.

 

2.

Drive or pump belt is worn, loose or

2.

Change the belt.

 

 

broken.

 

 

 

3.

Drive or pump belt is off a pulley.

3.

Change the belt.

 

4.

Broken or missing idler spring.

4.

Replace the spring.

 

5.

Hydraulic fluid level is low or too hot.

5.

Add hydraulic fluid to reservoir or let it

 

 

 

 

cool down.

 

 

 

 

 

Uneven cutting height.

1.

Blade(s) not sharp.

1.

Sharpen the blade(s).

 

2.

Cutting blade(s) is/are bent.

2.

Install new cutting blade(s).

 

3.

Mower deck is not level.

3.

Level mower deck from side-to-side and

 

 

 

 

front-to-rear.

 

4.

Underside of mower is dirty.

4.

Clean the underside of the mower.

 

5.

Tire pressure in drive tires not correct.

5.

Adjust tire pressure in the drive tires.

 

6.

Blade spindle bent.

6.

Contact an Authorized Service Dealer.

 

7.

Tips of adjacent blades are at an uneven

7.

Replace blades, spindles and (or) check

 

 

cutting height. Blades tips should be even

 

for damage to mower deck.

 

 

within 3/16 inch which is approximately

 

 

 

 

one blade thickness.

 

 

 

 

 

 

 

Abnormal vibration

1.

Cutting blade(s) is/are bent or unbalanced.

1.

Install new cutting blade(s).

 

2.

Blade mounting bolt is loose.

2.

Tighten the blade mounting bolt.

 

3.

Engine mounting bolts are loose.

3.

Tighten the engine mounting bolts.

 

4.

Loose engine pulley, idler pulley, or blade

4.

Tighten the appropriate pulley.

 

 

pulley.

 

 

 

5.

Engine pulley is damaged.

5.

Contact an Authorized Service Dealer.

 

6.

Blade spindle is bent.

6.

Contact an Authorized Service Dealer.

 

7.

Belt is damaged.

7.

Install new belt.

 

 

 

 

 

Blades do not rotate.

1.

Drive belt is worn, loose or broken.

1.

Check the belt tension.

 

2.

Drive belt is off pulley.

2.

Check belt for damage; replace if

 

 

 

 

necessary. Install drive belt and check belt

 

 

 

 

guide for correct position.

 

3.

Deck belt is worn, loose or broken.

3.

Install new deck belt.

 

4.

Deck belt is off pulley.

4.

Install deck pulley and check the idler

 

 

 

 

pulley, idler arm and spring for correct

 

 

 

 

position and function.

 

5.

Broken or missing idler spring.

5.

Replace the spring.

 

6.

Clutch has disengaged.

6.

Engine has overheated; determine cause

 

 

 

 

of overheat (see Engine overheats).

 

 

 

 

 

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Exmark 000 & higher, 920 manual Troubleshooting

920, 000 & higher specifications

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