TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 1031 of 1313
INSUFFICIENT BRAKES (VEHICLE STOPPING DISTANCE TOO LONG, NO APPARENT AIR SYSTEM
FAILURE WITH GAUGES AT NORMAL OPERATING PRESSURE, WARNING BUZZER NOT SOUNDING) -
Continued
STEP
23.
IS PROPER AIR PRESSURE AT PRIMARY RELAY VALVE?
a.
Stop engine and open all draincocks until brake system air pressure is vented.
b.
Close all draincocks.
c.
Disconnect pressure gauge from vehicle and return air line to original condition.
TRANSDUCER
T0223DAA
DELIVERY
PORT
ELBOW
DELIVERY LINE
PRIMARY AIR SYSTEM RELAY VALVE
Figure 22.
Primary Relay Valve Delivery Port.
TM 9-2320-272-23-1
0120
0120-42
Back to Top
