LS U5020 - Page 98

Cat. Faults Main causes Solutions
Engine stops at low
speed revolution.
▲ Fault of injection pump
▲ Valve gap is not correct
▲ Poor nozzle pressure
▲ Repair
▲ Adjust the gap
▲ Repair
Engine overheat
▲ Lack of engine coolant
▲ Bad fan belt tension or broken
▲ Dirt attached to the radiator
▲ Supplement
▲ Adjust belt tension or
replace
▲ Clean
The color of exhausted
smoke is white.
▲ Air cleaner clogged
▲ Engine oil exceeded
▲ Lack of fuel supply
▲ Wash element
▲ Adjust in proper level
▲ Repair
Engine
The color of exhausted
smoke is black.
▲ Bad quality of fuel
▲ Oversupply of fuel
▲ Fault of nozzle
▲ Use good quality fuel
▲ Repair
▲ Repair
Engine power is low.
▲ Injection nozzle clogged
▲ Carbon piled to valve seat
▲ Bad adjustment of valve gap
▲ 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.
▲ Lack of engine oil
▲ Low viscosity of engine oil
▲ Warning light switch error
▲ Fault of oil pump
▲ Oil filter element clogged
▲ Supplement
▲ Replace the proper oil viscosity
▲ Replace
▲ Repair
▲ Replace element
▲
Abnormal wiring
▲
Check battery terminals and
5
5 5
5 - 30
Battery charging
indicator is ON during
operation
▲
Abnormal wiring
▲ Fault of alternator
▲ Fault of battery
▲ Bad fan belt tension or broken
▲
Check battery terminals and
ground, repair
▲ Repair or replace
▲ Replace
▲ Adjust belt tension or replace
Clutch
Clutch is slipped.
▲ Wrong clutch pedal play
▲ Friction lining worn or broken
▲ Adjust
▲ Replace
Clutch does not cut-off.
▲ Lining damaged
▲ Wrong clutch pedal play
▲ Repair or replace
▲ Adjust