Troubleshooting. Toro DH 140 Lawn Tractor

Troubleshooting

Problem

The starter does not crank.

The engine overheats.

The machine does not drive.

The engine will not start, starts hard, or fails to keep running.

The engine loses power.

Possible Cause Corrective Action

1. The blade control (PTO) knob is engaged.

2. The parking brake is not on.

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. Move the blade control (PTO) knob to the Disengaged position.

2. Set the parking brake.

3. Charge the battery.

4. Check the electrical connections for good contact.

5. Replace the fuse.

6. Contact an Authorized Service Dealer.

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.

1. Reduce the ground speed.

2. Add engine oil to the crankcase.

3. Remove the obstruction from the cooling fins and air passages.

1. The drive control is in the Push position.

1. Move the drive control to the Operate position.

2. The traction belt is worn, loose, or broken.

3. The traction belt is off the pulley.

2. Contact an Authorized Service Dealer.

3. Contact an Authorized Service Dealer.

1. The operator is not seated.

2. The fuel tank is empty.

3. The air cleaner is dirty.

1. Sit on the seat.

2. Fill the fuel tank with gasoline.

3. Clean or replace the air cleaner element.

4. Install the wire on the spark plug.

4. The spark plug wire is loose or disconnected.

5. A spark plug is pitted, fouled, or the gap is incorrect.

6. The choke is not closing.

7. There is dirt in the fuel filter

8. The idle speed is too low or the mixture is incorrect.

9. Dirt, water, or stale fuel is in the fuel system.

10. The fuel shut-off valve is closed.

5. Install a new, correctly-gapped spark plug.

6. Adjust the throttle cable.

7. Replace the fuel filter.

8. Contact an Authorized Service Dealer.

9. Contact an Authorized Service Dealer.

10. Open the fuel shut-off valve.

1. The engine load is excessive.

1. Reduce your ground speed.

2. The air cleaner is dirty.

3. The oil level in the crankcase is low.

4. The cooling fins and air passages under the engine blower housing are plugged.

5. The spark plug is pitted, fouled, or the gap is incorrect.

8. Dirt, water, or stale fuel is in the fuel system.

2. Clean the air cleaner element.

3. Add engine oil to the crankcase.

4. Remove the obstruction from the cooling fins and air passages.

5. Install a new, correctly-gapped spark plug.

6. The vent hole in the fuel cap is plugged.

6. Clean or replace the fuel cap.

7. There is dirt in the fuel filter.

7. Replace the fuel filter.

8. Contact an Authorized Service Dealer.

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Problem

There is abnormal vibration.

The blades do not rotate.

The cutting height is uneven.

Possible Cause Corrective Action

1. The blades are bent or unbalanced.

1. Install a new blades.

2. The blade mounting screws are loose.

2. Tighten the blade mounting screws.

3. The engine mounting bolts are loose.

4. There is a loose engine pulley, idler pulley, or blade pulley.

3. Tighten the engine mounting bolts.

4. Tighten the appropriate pulley.

5. The engine pulley is damaged.

6. The blade drive belt is damaged.

5. Contact an Authorized Service Dealer.

6. Contact an Authorized Service Dealer.

1. The blade drive belt is worn, loose, or broken.

2. The blade drive belt is off the pulley.

3. The grass collector is not in place.

1. Contact an Authorized Service Dealer.

2. Contact an Authorized Service Dealer.

3. Install the grass collector.

1. The tire pressure is incorrect.

1. Set the tire pressure.

2. The mower is not level.

3. The underside of the mower is dirty.

2. Adjust the height adjustment cable rod assembly.

3. Clean the underside of the mower.

4. The blade mounting screws are loose.

4. Tighten the blade mounting screws.

5. The blade drive belt tension is incorrect.

5. Contact an Authorized Service Dealer.

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