Toro 77505 Operator's Manual page 76

The blades do not rotate.
The drive belt is worn, loose or broken.
The drive belt is off of the pulley.
The power-takeoff (PTO) switch or PTO
clutch is faulty.
The mower belt is worn, loose, or broken.
Troubleshooting: Storing the Battery
Possible Cause
Install a new drive belt.
Install the drive belt and check the adjusting
shafts and belt guides for the correct
position.
Contact an Authorized Service Dealer.
Install a new mower belt.
Page 7–4
Corrective Action
3465-589 C