70
ENGINE TROUBLESHOOTING
7/20, P65
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