System Faults Possible causes Solutions
Engine stops at low
speed revolution.
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Fault of injection pump
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Valve gap is not correct
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Poor nozzle pressure
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Repair
▲
Adjust the gap
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Repair
Engine overheat
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Lack of coolant
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Bad fan belt tension or broken
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Dirt attached to the radiator
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Supplement
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Adjust belt tension or
replace
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Wash
The color of exhausted
smoke is white.
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Air cleaner clogged
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Engine oil exceeded
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Lack of fuel supply
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Clean element or replace
▲
Adjust in proper level
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Repair
Engine
The color of exhausted
smoke is black.
▲
Bad quality of fuel
▲
Over fuel supply
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Fault of nozzle
▲
Use good quality fuel
▲
Repair
▲
Repair
Engine power is low.
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Injection nozzle clogged
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Carbon piled to valve seat
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Bad adjustment of valve gap
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Bad injection timing
▲
Lack of fuel supply
▲
Air cleaner clogged
▲
Repair
▲
Repair
▲
Repair
▲
Repair
▲
Check fuel system
▲
Clean or replace
Engine oil pressure
indicator is ON during
operation.
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Lack of engine oil
▲
Low viscosity of engine oil
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Pressure switch error
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Fault of oil pump
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Engine oil filter clogged
▲
Supplement
▲
Replace the proper oil viscosity
▲
Replace
▲
Repair
▲
Replace the filter
ground, and repair
▲
Repair or replace
▲
Replace
▲
Adjust belt tension or replace
Clutch
Clutch is slipped.
▲
Wrong adjustment of clutch
pedal play
▲
Friction lining worn or broken
▲
Adjust the pedal play
correctly
▲
Replace
Clutch does not cut-off.
▲
Lining damaged
▲
Clutch pedal play exceeded
▲
Repair or replace
▲
Adjust the pedal play
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