Exmark Metro 4500-352 Operator's Manual page 36

Troubleshooting
Problem
Mower pulls left or right (with levers fully
forward).
Machine does not drive.
Uneven cutting height.
Abnormal vibration.
Blades do not rotate.
Blades do not stop when disengaged.
Possible Cause
1. Idler arm pulleys and drive sheaves are
dirty.
2. Wheel drive belt pulley scrapers
adjustment is not correct
3. Idler pivot arms cannot pivot freely
4. Drive belts are worn.
5. Drive linkage adjustment is not correct.
6. Tire pressure in drive tires not correct.
1. Transmission drive belt is worn, loose or
broken.
2. Transmission drive belt is off a pulley.
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.
8. Caster mounting brackets are loose.
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.
7. Belt is damaged.
1. Deck belt is worn, loose or broken.
2. Deck belt is off pulley.
1. Blade brake is not adjusted properly.
2. Belt guide is not properly set
3. PTO engagement is not properly set.
36
Corrective Action
1. Remove mud and/or grass buildup.
2. Correct adjustment.
3. Lubricate ilder pivots.
4. Replace drive belts as a set. (Do Not mix
a new belt with a worn drive belt.)
5. Correct adjustment.
6. Adjust tire pressure in the drive tires.
1. Change the belt.
2. Change the belt.
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.
8. Tighten hardware.
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.
7. Install new belt.
1. Install new deck belt.
2. Install deck pulley and check the idler
pulley, idler arm and spring for correct
position and function.
1. Adjust blade brake.
2. Adjust belt guide to proper position.
3. Check the PTO engagement position.