Yanmar 8LV320 Operation Manual page 67

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