DAF CF75 Series Service Manual

DIAGNOSTICS
7-2
©
200416
Engine brake, XE/PE engine
1
ΧΦ65/75/85 series
4
7.2 FAULT-FINDING TABLE
SYMPTOM: EXHAUST BRAKE DOES NOT ENGAGE
Possible cause Remedy
Compressor delivers 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: EXHAUST BRAKE REMAINS ENGAGED
Possible cause Remedy
Butterfly valve stuck in butterfly valve housing Check free movement of butterfly valve
Electrical fault Check electrical circuit
SYMPTOM: DEB DOES NOT ENGAGE
Possible cause Remedy
Electrical fault Check electrical circuit
Engine oil pressure too low Check engine oil pressure
SYMPTOM: DEB REMAINS ENGAGED
Possible cause Remedy
Electrical fault Check electrical circuit
Solenoid valve mechanically blocked Check solenoid valve
Damaged solenoid valve sealing rings Replace all solenoid valve sealing rings
SYMPTOM: DEB OPERATES IRREGULARLY
Possible cause Remedy
Electrical fault Check electrical circuit
Incorrect setting of DEB clearance Check the DEB clearance
Main piston stuck in DEB housing Check free movement of main piston
Operating piston stuck in DEB housing Check free movement of operating piston
Damaged solenoid valve sealing rings Replace all solenoid valve sealing rings
Solenoid valve oil strainer is blocked Clean solenoid valve oil strainer
Control valve stuck in DEB housing Check free movement of control valve
Defective control valve Check the operation of the control valve
Lubricating oil too thick Run the engine at operating temperature
Lubricating oil diluted with fuel Check lubricating oil for dilution
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DAF CF75 Series Specifications

General

Brand	DAF
Model	CF75 Series
Category	Trucks
Language	English