Toro TimeCutter Z420 Operator's Manual page 37

Problem
The engine loses power.
The machine does not drive.
There is abnormal vibration.
Uneven cutting height.
Possible Causes
1. The engine load is excessive.
2. The air cleaner is dirty.
3. The oil level in the crankcase is
low.
4..
5.
The cooling fins and air
passages under the engine
blower housing are plugged.
The spark plug(s) is pitted,
fouled, or the gap is incorrect.
6. The vent in the fuel cap is
closed.
7.
8.
There is dirt in the fuel filter.
Dirt, water, or stale fuel is in the
fuel system.
9. There is incorrect fuel in the
fuel tank.
1. The traction belts are worn,
loose, or broken.
2. The traction belts are off of the
pulleys.
1. The engine mounting bolts are
loose.
.
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 mower is not level.
4. An anti-scalp wheel is not set
correctly.
5. The underside of the mower is
dirty.
6. The tire pressure is incorrect.
7. A blade spindle is bent.
Corrective Action
1. Reduce ground speed.
2. Clean the air cleaner element.
3. Add oil to the crankcase.
4. Remove the obstruction from
the cooling fins and air
passages.
5. Install a new, correctly gapped
spark plug(s).
6. Open the vent in the fuel cap.
7. Replace the fuel filter.
8. Contact an Authorized Service
Dealer.
9. Drain the tank and replace the
fuel with the proper type.
1. Contact an Authorized Service
Dealer.
2. Contact an Authorized Service
Dealer.
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 mower from
side-to-side and front-to-rear.
4. Adjust the anti-scalp wheel
height.
5. Clean the underside of the
mower.
6. Adjust the tire pressure.
7. Contact an Authorized Service
Dealer.
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