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 49 of 1313
TABLE OF CONTENTS - Continued
Page No.
WP Sequence No.
Figure 5.
Rear Service Brake Chamber.
.............................................................................................
0122-6
Figure 6.
Rear Service and Spring Brake Chamber.
...........................................................................
0122-6
VEHICLE VIBRATES, CHATTERS, OR BOUNCES WHEN BRAKES ARE APPLIED.
..............................
WP 0123
Figure 1.
Rear Service Brake Chamber.
.............................................................................................
0123-2
Figure 2.
Rear Service and Spring Brake Chamber.
...........................................................................
0123-3
BRAKES SQUEAL.
......................................................................................................................................
WP 0124
Figure 1.
Brakeshoes.
.........................................................................................................................
0124-2
Figure 2.
Brakeshoes.
.........................................................................................................................
0124-3
WARNING BUZZER SOUNDS WHEN BRAKES ARE APPLIED (PRIMARY & SECONDARY
GAUGE PRESSURE DROPS BELOW 55-65 PSI [379-448 KPA]).
............................................................
WP 0125
NO AIR PRESSURE (WARNING BUZZER SOUNDING, AIR PRESSURE NOT BUILDING TO
NORMAL OPERATING RANGE AS INDICATED BY GAUGES).
...............................................................
WP 0126
Figure 1.
Air Supply System.
...............................................................................................................
0126-2
Figure 2.
Air Compressor Governor Signal Line.
.................................................................................
0126-4
Figure 3.
Air Compressor Outlet Line.
.................................................................................................
0126-5
Figure 4.
Air Compressor Outlet Line.
.................................................................................................
0126-6
Figure 5.
Wet Supply Tank.
.................................................................................................................
0126-8
Figure 6.
Air Pressure Gauges.
...........................................................................................................
0126-9
Figure 7.
Air Governor.
......................................................................................................................
0126-10
AIR PRESSURE DOES NOT BUILD TO NORMAL OPERATING PRESSURE (ABOVE 80 PSI
[552 KPA]) ACCORDING TO GAUGES.
.....................................................................................................
WP 0127
Figure 1.
Air Supply System.
...............................................................................................................
0127-2
Figure 2.
Air Governor.
........................................................................................................................
0127-3
AIR PRESSURE BUILDS SLOWLY (TAKES EXCESSIVE AMOUNT OF TIME TO BUILD TO
100 PSI (690KPA).
.......................................................................................................................................
WP 0128
Figure 1.
Air Supply System.
...............................................................................................................
0128-2
Figure 2.
Air Governor.
........................................................................................................................
0128-3
AIR PRESSURE EXCEEDS MAXIMUM (GAUGES SHOW OVER 130 PSI [896 KPA]), SAFETY
VALVE OPENS TO RELEASE PRESSURE.
..............................................................................................
WP 0129
TM 9-2320-272-23-1
xxviii
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