5 - 31
System
Faults
Possible causes
Solutions
Engine
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
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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
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Adjust in proper level
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Repair
The color of exhausted
smoke is black.
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Bad quality of fuel
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Over fuel supply
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Fault of nozzle
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Use good quality fuel
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Repair
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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
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Lack of fuel supply
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Air cleaner clogged
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Repair
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Repair
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Repair
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Repair
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Check fuel system
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Clean or replace
Engine oil pressure
indicator is ON during
operation.
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Lack of engine oil
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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
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Supplement
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Replace the proper oil viscosity
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Replace
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Repair
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Replace the filter
Battery charging
indicator is ON during
operation
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Bad electrical connection
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Fault of alternator
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Fault of battery
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Bad fan belt tension or broken
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Check battery terminals,
ground, and repair
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Repair or replace
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Replace
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Adjust belt tension or replace
Clutch
Clutch is slipped.
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Wrong adjustment of clutch
pedal play
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Friction lining worn or broken
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Adjust the pedal play
correctly
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Replace
Clutch does not cut-off.
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Lining damaged
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Clutch pedal play exceeded
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Repair or replace
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Adjust the pedal play