Troubleshooting - Toro 74661 Operator's Manual

Troubleshooting

Problem
The engine overheats.
The starter does not crank.
The engine does not start, starts hard, or
fails to keep running.
The machine does not drive.
There is an abnormal vibration.
Possible Cause
1. The engine load is excessive.
2. The oil level in the crankcase is low.
3. The cooling fins and air passages
under the engine-blower housing are
plugged.
4. The air cleaner is dirty.
5. Dirt, water, or stale fuel is in the fuel
system.
1. The blade-control switch is engaged.
2. The motion-control levers are not in
the P position.
ARK
3. The battery is dead.
4. The electrical connections are
corroded or loose.
5. A fuse is blown.
6. A relay or switch is damaged.
1. The fuel tank is empty.
2. The choke is not on.
3. The air cleaner is dirty.
4. The spark-plug wire(s) is loose or
disconnected.
5. The spark plug(s) is pitted, fouled, or
the gap is incorrect.
6. There is dirt in fuel filter.
7. Dirt, water, or stale fuel is in fuel
system.
8. There is incorrect fuel in the fuel tank.
9. The oil level in the crankcase is low.
1. The bypass valves are open.
2. The traction belts are worn, loose, or
broken.
3. The traction belts are off of the pulleys.
4. The transmission has failed.
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.
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Corrective Action
1. Reduce the ground speed.
2. Add oil to the crankcase.
3. Remove the obstruction from the
cooling fins and air passages.
4. Clean or replace the air-cleaner
element.
5. Contact an Authorized Service Dealer
1. Move the blade-control switch to
Disengaged.
2. Move the motion-control levers
outward to the P position.
ARK
3. Charge the battery.
4. Check the electrical connections for
good contact.
5. Replace the fuse.
6. Contact an Authorized Service Dealer.
1. Fill the fuel tank.
2. Move the choke lever to On.
3. Clean or replace the air-cleaner
element.
4. Install the wire(s) on the spark plug.
5. Install a new, correctly gapped spark
plug(s).
6. Replace the fuel filter.
7. Contact an Authorized Service Dealer.
8. Drain the tank and replace the fuel with
the proper type.
9. Add oil to the crankcase.
1. Close the tow valves.
2. Contact an Authorized Service Dealer.
3. Contact an Authorized Service Dealer.
4. 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.