Hayter RZT420H Operator's Manual page 45

Problem
There is abnormal vibration.
Uneven cutting height.
The blades do not rotate.
Possible Cause
1. The engine mounting bolts are loose.
2. The engine pulley, idler pulley, or blade
pulley is loose.
3. The engine pulley is damaged.
4. The cutting blade(s) is/are bent or
unbalanced.
5. A blade mounting bolt is loose.
6. A blade spindle is bent.
1. The blade(s) is not sharp.
2. A cutting blade(s) is/are bent.
3. The cutter deck is not level.
4. An anti-scalp wheel is not set correctly.
5. The underside of the cutter deck is
dirty.
6. The tyre pressure is incorrect.
7. A blade spindle is bent.
1. The drive belt is worn, loose or broken.
2. The drive belt is off of the pulley.
3. The cutter deck belt is worn, loose, or
broken.
45
Corrective Action
1. Tighten the engine mounting bolts.
2. Tighten the appropriate pulley.
3. Contact an Authorized Service Dealer.
4. Install a new cutting blade(s).
5. Tighten the blade mounting bolt.
6. Contact an Authorized Service Dealer.
1. Sharpen the blade(s).
2. Install a new cutting blade(s).
3. Level the cutter deck from side-to-side
and front-to-rear.
4. Adjust the anti-scalp wheel height.
5. Clean the underside of the cutter deck.
6. Adjust the tyre pressure.
7. Contact an Authorized Service Dealer.
1. Install a new drive belt.
2. Install the drive belt and check the
adjusting shafts and belt guides for the
correct position.
3. Install a new cutter deck belt.