Toro 74253 Operator's Manual page 58

Problem
Uneven cutting height.
Blades do not rotate.
Malfunction Indicator Light (MIL) comes
on.
Possible Cause
1. Blade(s) not sharp.
2. Cutting blade(s) is/are bent.
3. Mower is not level.
4. Underside of mower is dirty.
5. Tire pressure is not correct.
6. Blade spindle bent.
1. Drive belt is worn, loose or broken.
2. Drive belt is off pulley.
3. Deck belt is worn, loose or broken.
4. Deck belt is off pulley.
5. Broken or missing idler spring.
1. Engine is too hot.
2. Old gas in the gas tank.
3. The fuel shut-off valve is not open
completely.
4. Fuel tank vent cap is blocked.
5. Air cleaner is dirty.
6. Battery is not charged.
7. Incorrect fuel filters used or dirty fuel
filters.
8. Connections to sensors electronic
control unit (ECU) and fuel injectors
are not secured properly.
58
Corrective Action
1. Sharpen the blade(s).
2. Install new cutting blade(s).
3. Level mower 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. Check the belt tension.
2. Install drive belt and check adjusting
shafts and belt guides for correct
position.
3. Install new deck belt.
4. Install deck pulley and check the idler
pulley, idler arm and spring for correct
position and function.
5. Replace the spring.
1. Turn engine off and let it cool.
2. Use new gas.
3. Open the fuel shut-off valve.
4. Make sure that the fuel tank vent cap is
not blocked and working properly.
5. Make sure that the air cleaner and
precleaner are clean. Replace if
necessary.
6. Charge or replace the battery.
7. Contact an Authorized Service Dealer.
8. Contact an Authorized Service Dealer.