TROUBLESHOOTING
8LV Series Operation Manual
61
Engine is not running smoothly
Operation failure of
injection valve
Nozzle operation failure Replace
Broken fuel valve spring Replace
Uneven fuel injection
quantities
Clogged fuel filter Replace
Faulty operation of regulator valve Replace
Air trapped in fuel injection system Bleed air from system and prime
system
Faulty operation of fuel supply pump Repair
Other Overload operation Reduce load
Moving parts seized Disassemble, inspect and conduct
servicing
Slippage of gear box Inspect and repair
Engine stops suddenly
No fuel feed Fuel level in fuel tank is low Add fuel and prime
Air trapped in fuel system or fuel injection Bleed air
Water trapped in fuel tank Drain water from drain cock and fuel
pipe, conduct priming
Fuel cock closed Inspect and repair as necessary
Clogged fuel filter Replace
Broken fuel pipe Replace
Failure of fuel supply pump Replace
Other Moving parts seized Disassemble and repair, or replace
Controller defects system error Inspect DTC and conduct servicing
Abnormal exhaust color
Failure of fuel injector Clogged injection nozzle Replace
Sticking needle valve Replace
Reduction in injection pressure Replace
Poor atomization Replace
Carbon deposit Clean
Turbo-charger failure Clogged air filter Clean
Dirty compressor side Clean
Clogged turbine side Clean
Damaged bearing Replace
Other Overload operation Reduce load
Lubricant level too high Lower the oil level
Accumulated carbon deposit at intake/exhaust
valve
Clean
Dirty air cooler Clean
Improper fuel Replace with proper fuel
Clogged intake/exhaust valve Clean
Symptom Probable Cause Measure
8LV_OPM.book 61 ページ ２０１１年１月１１日 火曜日 午後１２時８分
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