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Symptom
System does not reach operating
pressure
Ineffective park brake
870984-01
June 1, 1999
Pneumatic System Trouble Shooting
Possible Cause
Leaks in the hoses and/or fittings
Brake hoses are incorrectly fitted
Drain valves are open
Defective pressure gauge
Defective actuator
Defective pressure protection valve Replace protection valve. Contact
Defective unloader valve
Defective compressor
Park brake caliper incorrectly ad-
justed
Defective relay valve
Remedy
Repair the leaks
Refit the hoses correctly
Close the drain valves
Install a new pressure gauge
Replace actuator. Contact your
BELL Product Support Representa-
tive
your BELL Product Support Repre-
sentative
Reset or replace the unloader valve.
Contact your BELL Product Support
Representative
Repair or replace compressor. Con-
tact your BELL Product Support
Representative
Adjust the park brake caliper. Con-
tact your BELL Product Support
Representative
Replace relay valve. Contact your
BELL Product Support Representa-
tive
119
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