Troubleshooting - Toro 25430A Operator's Manual

Troubleshooting

Problem
The starter does not crank.
1. The engine cranks but will not start.
The engine starts but does not keep
running.
Possible Cause
1. The electrical connections are
corroded or loose.
2. A fuse is blown.
3. A fuse is loose.
4. The battery is discharged.
5. The relay or switch is damaged.
6. The starter or starter solenoid is
damaged.
7. Internal engine components have
seized up.
1. The starting procedure is incorrect.
2. The fuel tank is empty.
3. The fuel shutoff valve is closed.
4. There is dirt, water, stale fuel, or
incorrect fuel in the fuel system.
5. The fuel line is clogged.
6. There is air in the fuel.
7. The glow plugs do not operate.
8. The cranking speed is slow.
9. The air cleaning system elements are
dirty.
10. The fuel filter is clogged.
11. The fuel is not the proper grade for
cold-weather use.
12. The engine has low compression.
13. The injection nozzles or pump are
malfunctioning.
1. The fuel tank vent is restricted.
2. There is dirt or water in the fuel system.
3. The fuel filter is clogged.
4. There is air in the fuel.
5. The fuel is not the proper grade for
cold-weather use.
6. The fuel pump is damaged.
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Corrective Action
1. Check the electrical connections for
good contact.
2. Replace the fuse.
3. Install the fuse.
4. Charge the battery or replace it.
5. Contact your Authorized Service
Dealer.
6. Contact your Authorized Service
Dealer.
7. Contact your Authorized Service
Dealer.
1. Refer to Starting the Engine in
Operation.
2. Fill the fuel tank with fresh fuel.
3. Open the fuel shutoff valve.
4. Drain and flush the fuel system; add
fresh fuel.
5. Clean or replace the fuel line.
6. Bleed the nozzles and check for air
leaks at the fuel hose connections
and fittings between the fuel tank and
engine.
7. Check the fuse, glow plugs, and wiring.
8. Check the battery, oil viscosity, and
starting motor (contact your Authorized
Service Dealer).
9. Service the air cleaning system
elements.
10. Replace the fuel filter.
11. Drain the fuel system, replace the fuel
filter, and add fresh fuel having the
proper grade for ambient temperature
conditions. You may need to warm up
the entire machine.
12. Contact your Authorized Service
Dealer.
13. Contact your Authorized Service
Dealer.
1. Loosen the cap. If the engine runs with
the cap loosened, replace the cap.
2. Drain and flush the fuel system; add
fresh fuel.
3. Replace the fuel filter.
4. Bleed the nozzles and check for air
leaks at fuel hose connections and
fittings between the fuel tank and the
engine.
5. Drain the fuel system, replace the fuel
filter, and add fresh fuel having the
proper grade for ambient temperature
conditions. You may need to warm up
the entire machine.
6. Contact your Authorized Service
Dealer.