Toro 25430 Operator's Manual page 69

Problem
The engine runs but knocks or misses.
The engine is overheated.
There is excessive black smoke in the
exhaust.
Possible Cause
1. There is dirt or water in the fuel system.
2. The engine overheats.
3. There is air in the fuel.
4. The injection nozzles are damaged.
5. The engine has low compression.
6. The injection pump timing is incorrect.
7. There is excessive carbon buildup.
8. The engine has internal wear or
damage.
1. The coolant level is too low.
2. The air flow to the radiator is restricted.
3. The engine oil level is either too low or
too high.
4. The machine is under an excessive
load.
5. There is improper fuel in the fuel
system.
6. The thermostat is damaged.
7. The fan belt is loose or broken.
8. The injection timing is incorrect.
9. The coolant pump is damaged.
1. The engine is under an excessive load.
2. The air cleaning system elements are
dirty.
3. There is improper fuel in the fuel
system.
4. The injection pump timing is incorrect.
5. The injection pump is damaged.
6. The injection nozzles are damaged.
69
Corrective Action
1. Drain and flush the fuel system; add
fresh fuel.
2. Check the engine oil level and add oil
as needed; also check and service the
coolant system, if necessary.
3. Bleed the nozzle and check for air
leaks at the fuel hose connections and
the fittings between the fuel tank and
the 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. Check the coolant level and add
coolant to the system.
2. Inspect and clean the radiator screen.
3. Either add or drain the engine oil until
the oil level is at the Full mark.
4. Reduce the load on the machine;
operate the machine at a slower
ground speed.
5. Drain and flush the fuel system, then
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.
1. Reduce the ground speed of the
machine.
2. Service the air cleaning system
elements.
3. Drain and flush the fuel system, then
add fresh fuel.
4. Contact your Authorized Service
Dealer.
5. Contact your Authorized Service
Dealer.
6. Contact your Authorized Service
Dealer.