AIR SYSTEM LOSES PRESSURE DURING OPERATION/SLOW, NO, OR INCORRECT AIR PRESSURE BUILDUP (cont)

TM 9-2320-366-20-2

j1. AIR SYSTEM LOSES PRESSURE DURING OPERATION/SLOW, NO, OR INCORRECT AIR

PRESSURE BUILDUP (CONT)

KNOWN INFO

TEST OPTIONS

Soapy Water Leak Test and

FRONT BRAKE/REAR BRAKE

Visual Insepction

AIR pressure gages OK.

Is air dryer purge valve

REASON FOR QUESTION

Air hoses and fittings from air

free from constant air leaks

A leaking air dryer purge valve

cleaner to air compressor OK.

and excessive moisture?

or a clogged air dryer desiccant

Air hoses and fittings from air

cartridge may cause air system

compressor to air dryer OK.

to lose pressure or take an

Air hose and fittings from

excessive amount of time to

air dryer to wet tank OK.

build up air pressure.

Air hoses and fittings from

wet tank to air compressor OK.

Air hoses, check valves, and

fittings from wet tank to

primary and secondary air

tanks OK.

POSSIBLE PROBLEMS

Faulty air dryer purge valve

and/or clogged desiccant

cartridge.

Faulty air compressor

governor.

Faulty air compressor.

Service air dryer

YES

(para 23-11).

2-1960

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