Troubleshooting - Toro TX 420 Operator's Manual

Troubleshooting

PROBLEM
Starter does not crank
Engine will not start, starts hard, or g ,
fails to keep running. f il t k i
Engine loses power. g p
Engine overheats. g
Abnormal vibration.
Traction unit does not drive.
POSSIBLE CAUSES
1. Battery is dead.
2. Electrical connections are
corroded or loose.
3. Relay or switch is defective.
, 1. Fuel tank is empty.
2. Choke is not on.
3. Air cleaner is dirty.
4. Spark plug wires are loose or
disconnected.
5. Spark plugs are pitted, fouled,
or gap is incorrect.
6. Dirt in fuel filter.
7. Dirt, water, or stale fuel is in
fuel system.
1. Engine load is excessive.
2. Air cleaner is dirty.
3. Oil level in crankcase is low.
4. Cooling fins and air passages
under engine blower housing
are plugged.
5. Spark plugs are pitted, fouled,
or gap is incorrect.
6. Dirt in fuel filter.
7. Dirt, water, or stale fuel is in
fuel system.
1. Engine load is excessive.
2. Oil level in crankcase is low.
3. Cooling fins and air passages
under engine blower housing
are plugged.
1. Engine mounting bolts are
loose.
1. The parking brake is on.
2. Hydraulic fluid level low.
3. The tow valves are open.
4. Hydraulic system is damaged.
40
CORRECTIVE ACTION
1. Charge the battery.
2. Check electrical connections
for good contact.
3. Contact Authorized Service
Dealer.
1. Fill fuel tank with gasoline.
2. Move choke lever fully forward.
3. Clean or replace air cleaner
element.
4. Install wires on spark plugs.
5. Install new, correctly gapped
spark plugs.
6. Replace fuel filter.
7. Contact Authorized Service
Dealer.
1. Reduce ground speed.
2. Clean air cleaner element.
3. Add oil to crankcase.
4. Remove obstruction from
cooling fins and air passages.
5. Install new, correctly gapped
spark plugs.
6. Replace fuel filter.
7. Contact Authorized Service
Dealer.
1. Reduce ground speed.
2. Add oil to crankcase.
3. Remove obstruction from
cooling fins and air passages.
1. Tighten engine mounting bolts.
1. Release the parking brake.
2. Add hydraulic fluid.
3. Close the tow valves
4. Contact your Toro dealer.