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88
ENGINE TROUBLESHOOTING
9/275, 9/305, 12/250, 17/240, 21/220
Low oil pressure
Lack of oil
Oil leakage
High oil consumption
Wrong oil
Wrong type and viscosity.
High coolant temperature.
Over heat.
Clogged filter and strainer.
Worn bearings and oil pump.
Faulty relief valve.
Low engine output
Low cylinder compression
pressure.
Cylinder compression leakage
Incorrect valve clearance
adjustment.
Injector nozzle misalignment.
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.
Oil leakage.
Damaged seal / Damaged turbocharger seal
Loose joints/gaskets.
Improper installation of filter and piping.
Excessive fuel consumption
Fuel leakage.
Damaged seals.
Improper component installation or tightening.
Excessive injection volume.
Injection pump defective.
Excessive mechanical loads