Toro 320-D Operator's Manual page 42

Problem
The engine starts but does not keep
running.
The engine runs but knocks or misses.
The engine does not idle.
Possible Cause
1. The fuel-tank vent is restricted.
2. Dirt or water is in the fuel system.
3. The fuel filter is clogged.
4. There is air in the fuel.
5. Improper fuel grade for cold weather
was used in the machine.
6. The spark-arrestor screen is clogged.
7. The fuel pump is damaged.
1. Dirt, water, stale fuel, or incorrect fuel
is in the fuel system.
2. The engine is overheating.
3. There is air in the fuel.
4. The injection nozzles are damaged.
5. There is low compression
6. The injection-pump timing is incorrect.
7. There is excessive carbon buildup.
8. There is internal wear or damage.
1. The fuel-tank vent is restricted.
2. Dirt, water, stale fuel, or incorrect fuel
is in the fuel system.
3. The air-cleaner filters are dirty.
4. The fuel filter is clogged.
5. There is air in the fuel.
6. The fuel pump is damaged.
7. There is low compression
42
Corrective Action
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
engine.
5. Drain the fuel system and replace
the fuel filter. Add fresh fuel of
proper grade for ambient temperature
conditions.
6. Clean or replace the spark-arrestor
screen.
7. Contact your Authorized Service
Dealer.
1. Drain and flush the fuel system; add
fresh fuel.
2. Refer to "The engine overheats."
3. Bleed the nozzles and check for air
leaks at the fuel hose connections
and fittings between the fuel tank and
engine.
4. Contact your Authorized Service
Dealer.
5. Contact your Authorized Service
Dealer.
6. Contact your Authorized Service
Dealer.
7. Contact your Authorized Service
Dealer.
8. 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. Service the air filters.
4. Replace the fuel filter.
5. Bleed the nozzles and check for air
leaks at fuel hose connections and
fittings between the fuel tank and
engine.
6. Contact your Authorized Service
Dealer.
7. Contact your Authorized Service
Dealer.