3
DIAGNOSTICS
ZF intarder CF65/75/85 series
8-2
SYMPTOM: DELAYED RESPONSE
Possible cause Remedy
Air supply absent/too low Check air supply
Intarder air supply valve is not activated Check system
Intarder air supply valve does not empty
accumulator in spite of activation
Check system
Idle pressure too low Check system
SYMPTOM: DELAYED SWITCH-OFF
Possible cause Remedy
Slow decrease of intarder pressure after
switch-off
Check system
SYMPTOM: OIL LEAK
Possible cause Remedy
Oil level too high Check oil level
Oil leak between gearbox housing and intarder Replace gasket
Oil leak in pump Replace O-ring
Oil leak in proportional valve Replace O-ring
Oil leak in the accumulator Replace O-ring
Oil leak in the prop shaft flange Replace O-ring
SYMPTOM: AIR LEAKAGE
Possible cause Remedy
Air leak via intarder air supply valve Replace O-ring
SYMPTOM: COOLANT TEMPERATURE TOO HIGH
Possible cause Remedy
Coolant level too low Check coolant level
Temperature adjustment Check system
Intarder pressure present after intarder has been
switched off
Check system
1
ᓻ 200337
https://www.truck-manuals.net/
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