Doosan LIGHTSOURCE V9, Operation And Maintenance Manual

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ENGINE TROUBLESHOOTING
LIGHTSOURCE V9
Low engine output Incorrect injection timing Too far advanced.
Too far retarded.
Injection nozzle malfunction Incorrect injection pressure.
Incorrect spray condition.
Incorrect injection pump adjustment Lack of fuel in tank.
Insufficient fuel supply to the
injection pump
Air in injection pump.
Fuel filter clogged.
Overflow valve malfunction.
Governor malfunction Incorrect engine control
adjustment.
Deteriorated governor spring.
Incorrect valve clearance
adjustment.
Cylinder compression leakage Injector nozzle misalignment.
Low cylinder compression pressure Cylinder bore wear.
Insufficient air intake volume. Air cleaner clogged.
Restricted air flow.
Excessive oil consumption Incorrect oil Wrong selection of type and viscosity.
Too much oil quantity.
Engine burning oil Faulty piston rings/damaged cylinder bores.
Faulty valve stem seal.
Damaged seal / Damaged turbocharger seal
Oil leakage Loose joints/gaskets.
Improper installation of filter and piping.
Fuel leakage Damaged seals.
Excessive fuel consumption Improper component installation or tightening.
Excessive injection volume. Injection pump defective.
Excessive mechanical loads