Exmark NAVIGATOR 4500-367 - Manual (Page 37)

Troubleshooting
Problem Possible Cause Corrective Action
1. Engine load is excessive. 1. Reduce the ground speed.
2. Oil level in the crankcase is low. 2. Add oil to the crankcase.
Engine overheats.
3. Cooling fins and air passages for the
engine are plugged.
3. Remove the obstructions from the cooling
fins and air passages.
1. Tracking needs adjustment. 1. Adjust the tracking.
2. Tire pressure in drive tires not correct. 2. Adjust tire pressure in the drive tires.
Mower pulls left or right (with levers fully
forward).
3. Reverse indicator and speed control
linkage need adjustment.
3. Adjust the reverse indicator and the speed
control linkage.
1. Bypass valve is not closed tight. 1. Tighten the bypass valve.
2. Drive or pump belt is worn, loose or
broken.
2. Change the belt.
3. Drive or pump belt is off a pulley. 3. Change the belt.
4. Broken or missing idler spring. 4. Replace the spring.
Machine does not drive.
5. Hydraulic fluid level is low or too hot. 5. Add hydraulic fluid to reservoir or let it
cool down.
1. Engine mounting bolts are loose. 1. Tighten the engine mounting bolts.
2. Loose engine pulley, idler pulley, or blade
pulley.
2. Tighten the appropriate pulley.
3. Engine pulley is damaged. 3. Contact an Authorized Service Dealer.
Abnormal vibration.
4. Belt is damaged. 4. Install new belt.
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