TM-9-2320-272-23-3

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 3 OF 5

SEPTEMBER 2012
TM-9-2320-272-23-3

  TM-9-2320-272-23-3 - Page 787 of 1469

REMOVAL
WARNING
•
Do not disconnect air lines before draining air reservoirs. Small parts under pressure may
shoot out with high velocity. Failure to comply may result in injury or death to personnel.
•
Do not touch hot exhaust system components with bare hands. Failure to comply may
result in injury or death to personnel.
NOTE
•
Secondary reservoir is located below the cab on the right side frame rail below
primary
reservoir.
•
Tag air lines for installation.
1.
Disconnect wet reservoir supply line (Figure 1, Item 8) from elbow (Figure 1, Item 7).
2.
Disconnect drain valve line (Figure 1, Item 11) from adapter (Figure 1, Item 10).
3.
Disconnect supply line (Figure 1, Item 14) from elbow (Figure 1, Item 13).
4.
Disconnect supply line (Figure 1, Item 15) from adapter (Figure 1, Item 16).
5.
Disconnect two wires (Figure 1, Item 1) from secondary low-air pressure switch (Figure 1, Item 2).
NOTE
Assistant will support reservoir during Steps (6) and (7).
6.
Remove four locknuts (Figure 1, Item 20), screws (Figure 1, Item 18), and two support clamps
(Figure
1,
Item
19) from hangers (Figure 1, Item 17). Discard locknuts.
7.
Remove secondary reservoir (Figure 1, Item 5) from two hangers (Figure 1, Item 17) and place in soft-
jawed
vise.
8.
Remove secondary low-air pressure switch (Figure 1, Item 2), adapter (Figure 1, Item 3), and fitting
(Figure
1,
Item
4) from secondary reservoir (Figure 1, Item 5).
9.
Remove elbow (Figure 1, Item 7) and check valve (Figure 1, Item 6) from secondary reservoir
(Figure
1,
Item
5).
10.
Remove adapters (Figure 1, Items 9 and 10) from secondary reservoir (Figure 1, Item 5).
11.
Remove elbow (Figure 1, Item 13), adapter (Figure 1, Item 16), and fitting (Figure 1, Item 12) from secondary
reservoir (Figure 1, Item 5).
12.
Remove secondary reservoir (Figure 1, Item 5) from vise.
TM 9-2320-272-23-3
0441
0441-2


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