DAF CF65 Series Service Manual page 54

DIAGNOSTICS
Engine brake, XE/PE engine
7.2 FAULT-FINDING TABLE
1
Compressor delivers insufficient air pressure
Air leak in the air pipe from air dryer to exhaust
brake valve
Butterfly valve stuck in butterfly valve housing
Electrical fault
Butterfly valve stuck in butterfly valve housing
Electrical fault
Electrical fault
Engine oil pressure too low
Electrical fault
Solenoid valve mechanically blocked
Damaged solenoid valve sealing rings
Electrical fault
Incorrect setting of DEB clearance
Main piston stuck in DEB housing
Operating piston stuck in DEB housing
Damaged solenoid valve sealing rings
Solenoid valve oil strainer is blocked
Control valve stuck in DEB housing
Defective control valve
Lubricating oil too thick
Lubricating oil diluted with fuel
7-2
SYMPTOM: EXHAUST BRAKE DOES NOT ENGAGE
Possible cause
SYMPTOM: EXHAUST BRAKE REMAINS ENGAGED
Possible cause
SYMPTOM: DEB DOES NOT ENGAGE
Possible cause
SYMPTOM: DEB REMAINS ENGAGED
Possible cause
SYMPTOM: DEB OPERATES IRREGULARLY
Possible cause
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Remedy
Check the operation of the compressor
Check air pipe
Check free movement of butterfly valve
Check electrical circuit
Remedy
Check free movement of butterfly valve
Check electrical circuit
Remedy
Check electrical circuit
Check engine oil pressure
Remedy
Check electrical circuit
Check solenoid valve
Replace all solenoid valve sealing rings
Remedy
Check electrical circuit
Check the DEB clearance
Check free movement of main piston
Check free movement of operating piston
Replace all solenoid valve sealing rings
Clean solenoid valve oil strainer
Check free movement of control valve
Check the operation of the control valve
Run the engine at operating temperature
Check lubricating oil for dilution
4
series
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200416