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ENGINE TROUBLESHOOTING
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This item contains a simple troubleshooting. When a failure takes place on your engine, diagnose the cause referring this troubleshooting. Should the
cause of failure not be detected or you are unable to manage the failure, consult your machine supply source or nearest company engine service outlet.
Symptom
Problem
Solution
Engine cranks but will not start
Incorrect starting procedure.
Verify correct starting procedure.
No fuel.
Check fuel in tank.
Exhaust restricted.
Check and correct exhaust restriction.
Fuel filter plugged or full of water.
Replace fuel filter or drain water from filter.
Injection pump not getting fuel or air in fue system.
Check fuel flow at supply pump or bleed system.
Engine hard to start or will not start
Engine starting under load.
Disengage
Verify unloader position when starting
(correct = closed)
Improper starting procedure.
Review starting procedure.
No fuel.
Check fuel tank.
Air in fuel line.
Bleed fuel line.
Cold weather.
Use cold weather starting aids.
Slow starter speed.
See “Starter Cranks Slowly”.
Crankcase oil too heavy.
Use oil of proper viscosity.
Improper type of fuel.
Consult fuel supplier; use proper type fuel for
operating conditions.
Water, dirt, or air in fuel system.
Drain, flush, fill, and bleed system.
Clogged fuel filter.
Replace filter element.
Dirty or faulty injection nozzles.
Have authorized servicing dealer or engine
distributor check injectors.
Electronic fuel system problem if equipped)
See your distributor or servicing dealer.
Engine knocks
Low engine oil level.
Add oil to engine crankcase.
Low coolant temperature.
Remove and check thermostat.
Engine overheating.
See “Engine Overheats”.
Engine cold
Wrong or defective thermostat.
Remove and check thermostat.
Engine runs irregularly or stalls
frequently
Low coolant temperature.
Remove and check thermostat.
Clogged fuel filter.
Replace fuel filter element.
Water, dirt, or air in fuel system.
Drain, flush, fill, and bleed system.
Dirty or faulty injection nozzles. Have authorized
servicing dealer check injectors.
Electronic fuel system problem
See your distributor or servicing dealer.