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 1111 of 1313
SECONDARY PRESSURE GAUGE READS NO PRESSURE, LOW PRESSURE, OR BUILDS TO NORMAL
OPERATING PRESSURE SLOWLY. PRIMARY PRESSURE GAUGE READS NORMAL (ENGINE IDLING,
BRAKE PEDAL NOT APPLIED) - Continued
STEP
4.
DOES SECONDARY AIR RESERVOIR HAVE CORRECT AIR PRESSURE?
a.
Stop engine and open all draincocks until brake system air pressure is vented.
b.
Close draincocks.
T0281DAA
Figure 4.
Secondary Air Reservoir Drain Line.
TM 9-2320-272-23-1
0131
0131-6
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