Exmark Advantage Series 4500-466 Operator's Manual page 48

Troubleshooting
Problem
Engine loses power
Engine overheats. (Coolant temperature
gauge is approaching the red zone or warning
buzzer emits beep.)
Mower pulls left or right (with levers fully
forward)
Machine does not drive
Uneven cutting height.
Abnormal vibration
Blades do not rotate.
Possible Cause
1. Engine load is excessive
2. Air cleaner is dirty.
3. Oil level in the crankcase is low.
4. Cooling fins and air passages for the
engine are plugged.
5. Dirt in fuel filter.
6. Dirt, water, or stale fuel is in the fuel
system.
1. Temperature is increasing on coolant
temperature gauge.
2. Coolant level is low.
3. Debris on or around radiator.
4. Engine load is excessive.
5. Oil level in the crankcase is low.
6. Cooling fins and air passages for the
engine are plugged.
1. Tire pressure in drive tires not correct.
1. Drive release handle not in "operating"
position.
2. Drive or pump belt is worn, loose or
broken.
3. Drive or pump belt is off a pulley.
4. Broken or missing idler spring.
5. Hydraulic fluid level is low or too hot.
1. Blade(s) not sharp.
2. Cutting blade(s) is/are bent.
3. Mower deck is not level.
4. Underside of mower is dirty.
5. Tire pressure in drive tires not correct.
6. Blade spindle bent.
7. Tips of adjacent blades are at an uneven
cutting height. Blades tips should be even
within 3/16 inch which is approximately
one blade thickness.
1. Cutting blade(s) is/are bent or unbalanced.
2. Blade mounting bolt is loose.
3. Engine mounting bolts are loose.
4. Loose engine pulley, idler pulley, or blade
pulley.
5. Engine pulley is damaged.
6. Blade spindle is bent.
1. Drive belt is worn, loose or broken.
2. Deck belt is worn, loose or broken.
3. Deck belt is off pulley.
4. Broken or missing idler spring.
5. Drive belt not routed correctly.
48
Corrective Action
1. Reduce the ground speed.
2. Clean or replace the air cleaner element.
3. Add oil to the crankcase.
4. Remove the obstructions from the cooling
fins and air passages.
5. Replace the fuel filter.
6. Contact an Authorized Service Dealer.
1. Refer to Check Engine Coolant Level
section in the Maintenance.
2. Refer to Check Engine Coolant Level
section in the Maintenance.
3. Remove debris.
4. Reduce the ground speed.
5. Add oil to the crankcase.
6. Remove the obstructions from the cooling
fins and air passages.
1. Adjust tire pressure in the drive tires.
1. Position handle in "operating" position;
see Drive Wheel Release Valves section
in Operation.
2. Change the belt.
3. Change the belt.
4. Replace the spring.
5. Add hydraulic fluid to reservoir or let it
cool down.
1. Sharpen the blade(s).
2. Install new cutting blade(s).
3. Level mower deck from side-to-side and
front-to-rear.
4. Clean the underside of the mower.
5. Adjust tire pressure in the drive tires.
6. Contact an Authorized Service Dealer.
7. Replace blades, spindles and (or) check
for damage to mower deck.
1. Install new cutting blade(s).
2. Tighten the blade mounting bolt.
3. Tighten the engine mounting bolts.
4. Tighten the appropriate pulley.
5. Contact an Authorized Service Dealer.
6. Contact an Authorized Service Dealer.
1. Check the belt tension.
2. Install new deck belt.
3. Install belt on clutch and deck pulleys,
idlers, and tensioning idler per routing
decal on deck.
4. Replace the spring.
5. Refer to belt routing decal on deck.