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 559 of 1469

REMOVAL
WARNING
Weight of vehicle must remain supported on jack stands at all times. Do not attempt to support
weight of vehicle on hydraulic jack. Failure to comply may result in injury or death to personnel.
1.
Position bottle jack (Figure 1, Item 4) under front axle differential housing (Figure 1, Item 5) and raise vehicle.
2.
Position two jack stands (Figure 1, Item 3) under springs (Figure 1, Item 2), ahead of left and right spring
hangers (Figure 1, Item 1).
NOTE
Do not fully lower bottle jack.
3.
Lower bottle jack enough for springs (Figure 1, Item 2) to rest on jack stands.
WARNING
Do not disconnect air lines or hoses 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.
4.
Disconnect primary line (Figure 1, Item 6) and vent line (Figure 1, Item 7) from left and right service brake
chambers (Figure 1, Item 10).
5.
Remove adapter (Figure 1, Item 8) and elbow (Figure 1, Item 9) from left and right service brake chambers
(Figure 1, Item 10).
NOTE
•
Perform Step (6) for M939A2 series vehicles.
•
Perform Step (7) for left side of vehicle.
•
Perform Steps (8) through (11) for right side of vehicle.
6.
Disconnect two air lines (Figure 1, Item 21) from adapters (Figure 1, Item 22) on relief safety valve
(Figure
1,
Item
23).
7.
Remove cotter pin (Figure 1, Item 12), nut (Figure 1, Item 11), and drag link (Figure 1, Item 14) from steering
knuckle arm (Figure
1,
Item
13). Discard cotter pin. Tie drag link away from steering knuckle arm.
8.
Remove cotter pin (Figure 1, Item 15) from steering assist cylinder (Figure 1, Item 16). Discard cotter pin.
9.
Bend tabs of clip (Figure 1, Item 17) away from felt pad (Figure 1, Item 18) and steering knuckle ball
(Figure
1,
Item
19).
10.
Loosen adjustable plug (Figure 1, Item 20) and tap steering assist cylinder (Figure 1, Item 16) free from steering
knuckle ball (Figure 1, Item 19). Tie steering assist cylinder away from steering knuckle ball.
11.
Remove felt pad (Figure 1, Item 18) and clip (Figure 1, Item 17) from steering knuckle ball (Figure 1, Item 19).
TM 9-2320-272-23-3
0404
0404-2


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