Toro 320-D Operator's Manual page 43

Problem
The engine overheats.
The engine loses power.
Exhaust produces excessive black smoke.
Possible Cause
1. More coolant is needed.
2. There is restricted air flow to the
radiator.
3. The crankcase-oil level is incorrect.
4. The engine load is excessive.
5. Incorrect fuel is in the fuel system.
6. The thermostat is damaged.
7. The fan belt is loose or broken.
8. Injection timing is incorrect.
9. The coolant pump is damaged.
10. The engine rpm is too low.
1. The engine load is excessive.
2. The crankcase-oil level is incorrect.
3. The air-cleaner filters are dirty.
4. Dirt, water, stale fuel, or incorrect fuel
is in the fuel system.
5. The engine is overheating.
6. The spark-arrestor screen is clogged.
7. There is air in the fuel.
8. There is low compression
9. The fuel-tank vent is restricted.
10. The injection-pump timing is incorrect.
11. The injection pump is damaged.
12. The engine high idle speed is too low.
1. The engine load is excessive.
2. The air-cleaner filters are dirty.
3. Incorrect fuel is in the fuel system.
4. The injection-pump timing is incorrect.
5. The injection pump is damaged.
6. The injection nozzles are damaged.
43
Corrective Action
1. Check and add coolant.
2. Inspect and clean the radiator screen
with every use.
3. Fill or drain to the Full mark.
4. Reduce the load; use a lower ground
speed.
5. Drain and flush the fuel system; add
fresh fuel.
6. Contact your Authorized Service
Dealer.
7. Contact your Authorized Service
Dealer.
8. Contact your Authorized Service
Dealer.
9. Contact your Authorized Service
Dealer.
10. Check the high idle speed.
1. Reduce the load; use a lower ground
speed.
2. Fill or drain to the Full mark.
3. Service the air filters.
4. Drain and flush the fuel system; add
fresh fuel.
5. Refer to "The engine overheats."
6. Clean or replace the spark-arrestor
screen.
7. Bleed the nozzles and check for air
leaks at fuel hose connections and
fittings between the fuel tank and
engine.
8. Contact your Authorized Service
Dealer.
9. Contact your Authorized Service
Dealer.
10. Contact your Authorized Service
Dealer.
11. Contact your Authorized Service
Dealer.
12. Contact your Authorized Service
Dealer.
1. Reduce the load; use a lower ground
speed.
2. Service the air filters.
3. Drain and flush the fuel system; add
fresh fuel.
4. Contact your Authorized Service
Dealer.
5. Contact your Authorized Service
Dealer.
6. Contact your Authorized Service
Dealer.