TEST OPTIONS
Visual inspection
REASON FOR QUESTION
KNOWN INFO
NO
YES
TM 9-2320-366-20-2
j4. NO AIR PRESSURE PRESENT AT REAR GLADHAND(S)
(ALL MODELS EXCEPT M1088) (CONT)
2-1976.28
Change 1
Is air present at booster
valve supply port?
If air is present, booster valve
is faulty.
Go to step 18
of this fault.
Replace booster
valve (para 11-15).
17.
Faulty booster valve.
Faulty service gladhand
two-way check valve.
Faulty air hose 145.
POSSIBLE PROBLEMS
Vehicle park and service brakes
OK.
Air hoses free from kinks.
Emergency gladhand OK.
Air hose 155, 157, or 167
OK.
Service gladhand OK.
Air hose 149, 150, or 151
OK.
Air hose 102 OK.
Air hose 108 OK.
TRAILER AIR SUPPLY valve
OK.
Air hose 104 OK.
Air hose 241, 253, or 254
OK.
Air brake protecting valve OK.
Air hose 230 or 256 OK.
Load sensing valve control port
tee fitting OK.
Air hose 240 or 243 OK.
Air hose 120 OK.
Inversion valve control port
90-degree fitting OK.
Air hose 128, 130, or 132
OK.