BENDIX M-21-M-22 ANTILOCK MOD ASSY Manual de servicio descargar pdf (Pagina 26)

Air Brake System

Revised 11/15/99

Troubleshooting Guide

Air Dryer (cont’d)

Condition Possible Cause Remedy/Recommendation

Constant Exhaust Of Air At Air dryer purge valve Check for excessive leakage

Air Dryer Purge Valve Exhaust leaking excessively. with compressor loaded,

Or Unable To Build System apply soap solution on

Pressure purge valve exhaust. Repair

or replace air dryer. Refer to

the Medium Duty Truck Unit

Repair Manual.

Faulty governor. Check governor for proper

cut-in, cut-out pressure and

excessive leakage in both

positions. Replace or adjust

as necessary.

Purge control line Connect purge control line

connected to reservoir or to unloader port of

exhaust port of governor. governor.

Faulty heater and thermo- Test electrical circuit.

stat, wiring, blown fuse. Replace parts as necessary.

Inlet and outlet air Connect lines properly.

connections reversed.

Check valve between Test check valve for proper

air dryer and first reservoir operation.

faulty.

Kinked or blocked Clean or replace as

discharge line. necessary.

Excessive bends in Correct line routing.

discharge line (water Discharge line should be

collects and freezes). constantly sloping from

compressor to air dryer with

as few bends as possible.

Excessive system leakage. Check for system leakage

and repair.

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BENDIX M-21-M-22 ANTILOCK MOD ASSY Manual de servicio Pagina 26