Toro GrandStand 79534 Operator's Manual page 61

Problem
The cutting height is uneven.
The blades do not rotate.
Possible Cause
1. Blade(s) are not sharp.
2. Cutting blade(s) is/are bent.
3. The mower deck is not level.
4. The mower deck pitch is wrong.
5. The underside of mower deck is dirty.
6. The tire pressure is not correct.
7. A blade spindle is bent.
1. A pump drive belt is worn, loose or
broken.
2. A pump drive belt is off pulley.
3. A mower deck belt is worn, loose or
broken.
4. A mower deck belt is off pulley.
5. An idler spring is broken or missing.
6. The electric clutch is out of adjustment.
7. The clutch connector or wire is
damaged.
8. The electric clutch is damaged.
9. The safety-interlock system prevents
blade rotation.
10. The PTO switch is faulty.
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Corrective Action
1. Sharpen the blade(s).
2. Install new cutting blade(s).
3. Level the mower deck side-to-side
position.
4. Adjust the front-to-rear pitch.
5. Clean the underside of the mower
deck.
6. Adjust the tire pressure.
7. 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.
6. Adjust the clutch air gap.
7. Contact an Authorized Service Dealer.
8. Contact an Authorized Service Dealer.
9. Contact an Authorized Service Dealer.
10. Contact an Authorized Service Dealer.