Toro 74891 Operator's Manual page 51

Problem
The machine does not drive.
The machine vibrates abnormally.
The machine cutting height is uneven.
The blades do not rotate.
Possible Cause
1. The by pass valves are not closed
tight.
2. The pump belt is worn, loose or broken.
3. The pump belt is off a pulley.
4. The idler spring is broken or missing.
5. The hydraulic oil level is low or too hot.
1. The cutting blade(s) is/are bent or
unbalanced.
2. The blade mounting bolt is loose.
3. The engine mounting bolts are loose.
4. There is a loose engine pulley, idler
pulley, or blade pulley.
5. The engine pulley is damaged.
6. The blade spindle is bent.
7. The motor mount is loose or worn.
1. The blade(s) is/are not sharp.
2. The cutting blade(s) is/are bent.
3. The mower deck is not level.
4. The underside of mower is dirty.
5. The tire pressure is not correct.
6. The blade spindle bent.
1. The mower deck belt is worn, loose
or broken.
2. The mower deck belt is off pulley.
3. The pump drive belt is worn, loose or
broken.
4. The idler spring is broken or missing.
51
Corrective Action
1. Tighten the by pass valves.
2. Change the belt.
3. Change the belt.
4. Replace the spring.
5. Add hydraulic oil to reservoirs or let it
cool down.
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. Contact an Authorized Service Dealer.
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 the tire pressure.
6. Contact an Authorized Service Dealer.
1. Install new deck belt.
2. Install mower deck pulley and check
the idler pulley, idler arm and spring for
correct position and function.
3. Check the belt tension or install new
belt.
4. Replace the spring.