BENDIX M-21-M-22 ANTILOCK MOD ASSY Manual de servicio descargar pdf (Pagina 25)

Air Brake System

Revised 11/15/99

Troubleshooting Guide

Air Dryer (cont’d)

Condition Possible Cause Remedy/Recommendation

Water in Vehicle Reservoirs Bendix air dryer desiccant Replace desiccant cartridge.

cartridge requires Refer to the Medium Duty

replacement. Truck Unit Repair Manual.

Air system charged from Charge system from the filter

an external air source. Air valve at the air compressor

not passing through so the sir must flow through

air dryer. the air dryer.

Air dryer not purging. Check purge valve. Refer to

the Medium Duty Truck Unit

Repair Manual.

Purge (air exhaust) time Refer to correction

too short, due to excessive procedures above for air

system leakage. dryer constantly cycling or

purging.

Safety Valve On Air Dryer Bendix air dryer desiccant Replace cartridge. Refer to

Popping Off Or Exhausting Air cartridge plugged or the Medium Duty Truck Unit

saturated with contaminates. Repair Manual.

Faulty internal check valve. Test check valve. Build sys-

tem pressure to governor

cutout. Wait 2 minutes for

completion of purge cycle.

Using soap solution at

exhaust, air leakage should

not exceed 25-mm (1-inch)

bubble in 5 seconds. Repair

or replace air dryer. Refer to

the Medium Duty Truck Unit

Repair Manual.

Faulty fittings, hose, or Check to determine if air is

tubing between air dryer reaching main supply

and main supply reservoir. reservoir. Inspect for kinked

tubing or hose. Check for

undrilled or restricted hose

or tubing fittings. Replace as

necessary.

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BENDIX M-21-M-22 ANTILOCK MOD ASSY Manual de servicio Pagina 25