INSUFFICIENT BRAKES (VEHICLE STOPPING DISTANCE TOO LONG, NO APPARENT AIR SYSTEM
FAILURE WITH GAUGES AT NORMAL OPERATING PRESSURE, WARNING BUZZER NOT SOUNDING) -
Continued
d.
Disconnect air line from primary relay valve supply port (Volume 3, WP
0458). Refer to point to point
schematics.
e.
Connect pressure gauge to disconnected air supply line.
f.
Assistant starts engine and runs to build air supply to normal operating pressure.
g.
Assistant fully applies and holds service brakes.
h.
Monitor air pressure on pressure gauge.
i.
Pressure gauge should read 90 to 130 psi.
CONDITION/INDICATION
IS THERE PROPER AIR PRESSURE IN SUPPLY LINE FROM PRIMARY AIR TANK TO RELAY VALVE?
DECISION
NO - Replace damaged air line from primary air tank to primary relay valve (Volume 5, WP
0805). Go to
Step
(30) to verify problem is solved.
YES - Replace primary relay valve (Volume 3, WP
0458). Go to Step (30) to verify problem is solved.
TM 9-2320-272-23-1
0120
0120-47