Troubleshooting - Toro 74448 Operator's Manual

Troubleshooting

Problem
Starter does not crank
Engine will not start, starts hard, or fails
to keep running.
Engine loses power.
Engine overheats.
Machine does not drive.
Abnormal vibration.
Possible Cause
1. Blade control (PTO) is engaged.
2. Parking brake is not on.
3. Operator is not seated.
4. Battery is dead.
5. Electrical connections are corroded or
loose.
6. Fuse is blown.
7. Relay or switch is defective.
1. Fuel tank is empty.
2. Air cleaner is dirty.
3. Dirt in the fuel filter.
4. Dirt, water, or stale fuel is in the fuel
system.
1. Engine load is excessive.
2. Air cleaner is dirty.
3. Oil level in the crankcase is low.
4. Cooling fins and air passages above
the engine are plugged.
5. Vent hole in the fuel cap is plugged.
6. Dirt in the fuel filter.
7. Dirt, water, or stale fuel is in the fuel
system.
1. Engine load is excessive.
2. Oil level in the crankcase is low.
3. Cooling fins and air passages above
the engine are plugged.
1. By pass valve is not closed tight.
2. Drive or pump belt is worn, loose or
broken.
3. Drive or pump belt is off a pulley.
4. Broken or missing idler spring.
5. Hydraulic fluid level is low or too hot.
1. Cutting blade(s) is/are bent or
unbalanced.
2. Blade mounting bolt is loose.
3. Engine mounting bolts are loose.
4. Loose engine pulley, idler pulley, or
blade pulley.
5. Engine pulley is damaged.
6. Blade spindle is bent.
7. Motor mount is loose or worn.
50
Corrective Action
1. Move the blade control (PTO) to
disengaged.
2. Set the parking brake.
3. Sit on the seat.
4. Charge the battery.
5. Check the electrical connections for
good contact.
6. Replace the fuse.
7. Contact an Authorized Service Dealer.
1. Fill the fuel tank with fuel.
2. Clean or replace the air cleaner
element.
3. Replace the fuel filter.
4. Contact an Authorized Service Dealer.
1. Reduce the 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. Clean or replace the fuel cap.
6. Replace the fuel filter.
7. Contact an Authorized Service Dealer.
1. Reduce the ground speed.
2. Add oil to the crankcase.
3. Remove the obstruction from the
cooling fins and air passages.
1. Tighten the by pass valve.
2. Change the belt.
3. Change the belt.
4. Replace the spring.
5. Add hydraulic fluid to reservoir or let it
cool down.
1. Install new cutting blade(s).
2. Tighten the blade mounting bolt.
3. Tighten the engine mounting bolts.
4. Tighten the appropriate pulley.
5. Contact an Authorized Service Dealer.
6. Contact an Authorized Service Dealer.
7. Contact an Authorized Service Dealer.