Toro 74450TE Z400 Z Master Operator's Manual page 55

Problem
Uneven cutting height.
Blades do not rotate.
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.
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Corrective Action
1. Sharpen the blade(s).
2. Install new cutting blade(s).
3. Level the 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 the drive belt and check
adjusting shafts and belt guides for
correct position.
3. Install a new deck belt.
4. Install the deck pulley and check the
idler pulley, idler arm and spring for
correct position and function.
5. Replace the spring.