DAF CF65, CF75, CF85 Series . Manual — part 188
©
200351
4-1
CE-engine lubrication system
DIAGNOSTICS
ΧΦ65/75/85 series
2
1
4. 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
©
200351
CE-engine lubrication system
1
ΧΦ65/75/85 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
Oil pressure switch defective
Check the 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 passage pipe or oil suction pipe loose or broken Check oil pipes. 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
Defective internal oil pressure pipes or seals
Check the oil pressure pipes and seals
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 liners
Replace the piston rings and/or cylinder liners
Check the air inlet system
Check the oil specifications
Injector O-ring damaged or not present
Check the injector seal
©
200351
5-1
PE/XE engine, general
DIAGNOSTICS
ΧΦ65/75/85 series
2
1
5. PE/XE ENGINE, GENERAL
5.1 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
5-2
©
200351
PE/XE engine, general
1
ΧΦ65/75/85 series
2
5.2 FAULT-FINDING TABLE, ENGINE FUNCTIONS
SYMPTOM: ENGINE CAN BE STARTED, BUT DOES NOT RUN
Possible cause
Remedy
Poor fuel quality
Drain fuel, flush fuel system, replace the fuel filters
and fill fuel tank with fuel
Air in fuel system
Check for drawing in of air:
-
via the suction pipe
-
via the fuel lift pump seal
Fuel filter(s) blocked
Replace the fuel filter and clean the system
No fuel supply/fuel lift pump defective; no delivery
Check:
-
the fuel level
-
the pipes for blockage and leaks
-
the fuel lift pump
Pressure relief valve on pump housing does not
shut off
Check the pressure relief valve
SYMPTOM: ENGINE STALLS AND RUNS AGAIN AFTER RE-STARTING
Possible cause
Remedy
Air in fuel system
Check for drawing in of air:
-
via the suction pipe
-
via the fuel lift pump seal
Pressure relief valve on pump housing does not
shut off
Check the pressure relief valve
SYMPTOM: ENGINE STARTS POORLY
Possible cause
Remedy
Poor fuel quality
Drain fuel, flush fuel system, replace the fuel filters
and fill fuel tank with fuel
Air in fuel system
Check for drawing in of air:
-
via the suction pipe
-
via the fuel lift pump seal
Fuel filter clogged
Replace the fuel filter and clean the system
Mechanical defect or clogging in pump units
Replace the pump units
Injectors defective
Check the injectors
Pressure relief valve on pump housing does not
shut off
Check the pressure relief valve
Fuel lift pump delivery too low
Check the fuel lift pump and replace if necessary
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