DAF LF45, LF55 Series. Manual — part 161
©
200505
4-1
BE/CE engine lubrication system
DIAGNOSTICS
ΛΦ45/55 series
2
1
4. BE/CE ENGINE LUBRICATION SYSTEM
4.1 INTRODUCTION
If there is a fault in the system, it is usually
detected by the electronic unit in the form of a
fault code. This fault code can be read out using
DAVIE. The fault-finding table contains possible
causes of symptoms not detected by the
electronic unit.
DIAGNOSTICS
4-2
©
200505
BE/CE engine lubrication system
1
ΛΦ45/55 series
2
4.2 FAULT-FINDING TABLE
SYMPTOM: ENGINE OIL PRESSURE TOO LOW
Possible cause
Remedy
Engine oil level too low
Top up engine oil to maximum level
External oil leaks
Visually check the engine for leaks. Repair if
necessary
Engine oil pressure and temperature sensor or
engine oil pressure control switch faulty
Check the sensor or switch. Replace if necessary
Oil does not meet the required specifications
Change the engine oil and the oil filter
Oil temperature is too high
Check the oil cooler
Oil mixed with coolant or fuel.
Change the engine oil and the oil filter
Oil suction pipe loose or broken
Check oil pipe. Repair if necessary
Oil pressure control valve fails to operate
Check the oil pressure control valve
Inadequate functioning of oil pump
Check the oil pump
Main or big-end bearings worn out
Check main or big-end bearings
Piston cooler oil nozzle has come loose
Check oil nozzle. Replace if necessary
Fouling between oil pressure control valve and
seat
Check/clean the oil pressure control valve
Oil filter fouled
Replace the oil filter
SYMPTOM: ENGINE CONSUMES TOO MUCH OIL
Possible cause
Remedy
Inlet system failure
Check the inlet system
Exhaust system failure
Check the exhaust system
Oil cooler leaks
Check whether there is lubricating oil in the engine
cooling system
Oil temperature is too high
Check that the correct oil cooler has been installed
Excessive blow-by
Check the compression pressure and carry out a
cylinder leak test
Check the condition of the piston rings and cylinder
liners
Worn piston rings and/or cylinder walls
Replace the piston rings and/or drill/hone the
cylinders
Check the air inlet system
Check oil specifications
Turbocharger defective
Check the turbocharger
©
200505
1
Contents
BE ENGINE
ΛΦ45/55 series
2
2
2 BE engine
CONTENTS
Page
Date
BE ENGINE
2
©
200505
Contents
2
ΛΦ45/55 series
2
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