Troubleshooting - Toro GrandStand 79534 Operator's Manual

Troubleshooting

Problem
The engine does not start, starts hard, or
fails to keep running.
The engine loses power.
The engine overheats.
The machine does not drive.
There is abnormal vibration.
Possible Cause
1. The fuel tank is empty or the shutoff
valve is closed.
2. The choke is not on.
3. A spark plug wire is loose or
disconnected.
4. A spark plug is pitted, fouled, or the
gap is incorrect.
5. The air cleaner is dirty.
6. Dirt is in the fuel filter.
7. Dirt, water, or stale fuel is in the fuel
system.
8. The gap between the safety-interlock
switches is not correct.
1. The engine load is excessive.
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. A spark plug is pitted, fouled, or the
gap is incorrect.
6. The vent hole in the fuel cap is plugged.
7. Dirt is in the fuel filter.
8. 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 under
the engine blower housing are plugged.
1. The hydraulic-oil reservoir is low.
2. Air is in the hydraulic system.
3. A pump-drive belt slips.
4. A pump-drive belt idler spring is
missing.
5. Pump bypass valves are open.
1. Cutting blade(s) is/are bent or
unbalanced.
2. A blade-mounting bolt is loose.
3. Engine mounting bolts are loose.
4. An engine pulley, idler pulley, or blade
pulley is loose.
5. An engine pulley is damaged.
6. A blade spindle is bent.
60
Corrective Action
1. Fill the fuel tank with gasoline and
open the valve
2. Move the choke lever to the C
position.
3. Install the wire on spark plug.
4. Install a new, correctly gapped spark
plug.
5. Service the air cleaner element.
6. Replace the fuel filter.
7. Contact an Authorized Service Dealer.
8. Contact an Authorized Service Dealer.
1. Reduce the ground speed.
2. Service 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.
6. Clean or replace the fuel cap.
7. Replace the fuel filter.
8. 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. Add hydraulic fluid to the reservoir.
2. Bleed the air out the hydraulic system.
3. Replace the pump drive belt.
4. Replace the pump drive belt idler
spring.
5. Tighten the bypass valves. Torque to
12 to 15 N∙m (9 to 11 ft-lb).
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.
HOKE