DAF CF65, CF75, CF85 Series . Manual — part 410
©
200416
3-3
CE engine inlet/exhaust system
DIAGNOSTICS
ΧΦ65/75/85 series
4
1
Compressor side of turbocharger contaminated
Clean compressor side with a non-corrosive clean-
ing agent or a soft brush. Check the intake side for
carbon deposits or other contamination
Gas leak between the exhaust manifold and the
cylinder head
Check the fixing bolts and gaskets
Gas leak between the exhaust manifold and the
turbocharger
Check the fixing bolts and gaskets
Turbocharger damaged
Replace the turbocharger and identify the cause
SYMPTOM: BLACK SMOKE EMERGES FROM EXHAUST
Possible cause
Remedy
SYMPTOM: BLUE SMOKE EMERGES FROM EXHAUST
Possible cause
Remedy
Air filter element blocked
Replace the air filter element
Air leakage between turbocharger and inlet mani-
fold
Check flexible pipes and pressurise intake unit
Air leakage between the inlet manifold and cylinder
head
Check for leakage. Replace gaskets, if necessary
Compressor side of turbocharger contaminated
Clean compressor side with a non-corrosive clean-
ing agent or a soft brush. Check the intake side for
carbon deposits or other contamination
Turbocharger oil discharge pipe clogged
Check oil pipe. Replace as necessary
Turbocharger damaged
Replace the turbocharger and identify the cause
SYMPTOM: OIL LEAK AT TURBINE SIDE OF TURBOCHARGER
Possible cause
Remedy
Compressor side of turbocharger contaminated
Clean compressor side with a non-corrosive clean-
ing agent or a soft brush. Check the intake side for
carbon deposits or other contamination
Turbocharger oil discharge pipe clogged
Check oil pipe. Replace as necessary
Turbocharger damaged
Replace the turbocharger and identify the cause
SYMPTOM: OIL LEAK AT COMPRESSOR SIDE OF TURBOCHARGER
Possible cause
Remedy
Air filter element blocked
Replace the air filter element
Turbocharger oil pipe clogged
Check oil pipe. Replace as necessary
Turbocharger damaged
Replace the turbocharger and identify the cause
DIAGNOSTICS
3-4
©
200416
CE engine inlet/exhaust system
1
ΧΦ65/75/85 series
4
SYMPTOM: EXHAUST GAS BACK PRESSURE TOO HIGH
Possible cause
Remedy
Incorrect butterfly valve adjustment
Check the adjustment of the butterfly valve
Butterfly valve incorrectly positioned
Check whether the butterfly valve has been posi-
tioned correctly
Butterfly valve partially operated by residual pres-
sure in the operating cylinder
Check operating cylinder
Original exhaust silencer not fitted
Check exhaust silencer
Exhaust pipe crushed or internally blocked by a
loose part
Check exhaust system for blockage and/or dam-
age
SYMPTOM: INLET UNDERPRESSURE TOO HIGH
Possible cause
Remedy
Air filter element blocked
Replace air filter element
©
200416
4-1
Engine brake, CE engine
DIAGNOSTICS
ΧΦ65/75/85 series
4
1
4. ENGINE BRAKE, CE ENGINE
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
©
200416
Engine brake, CE engine
1
ΧΦ65/75/85 series
4
4.2 FAULT-FINDING TABLE
SYMPTOM: ENGINE BRAKE DOES NOT ENGAGE
Possible cause
Remedy
Compressor delivering insufficient air pressure.
Check the operation of the compressor.
Air leak in the air pipe from air dryer to exhaust
brake valve.
Check air pipe.
Butterfly valve stuck in butterfly valve housing.
Check free movement of butterfly valve.
Electrical fault.
Check electrical circuit.
SYMPTOM: ENGINE BRAKE REMAINS ENGAGED
Possible cause
Remedy
Butterfly valve stuck in butterfly valve housing.
Check free movement of butterfly valve.
Electrical fault.
Check electrical circuit.
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