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 - Page 1397 of 1469
INSTALLATION
1.
Install spring seat wear pad (Figure 3, Item 2) in upper spring bracket (Figure 3, Item 1).
2.
Slide upper spring bracket (Figure 3, Item 1) on bottom leaf (Figure 3, Item 4) and install on axle housing
(Figure 3, Item 3) over dowel pin (Figure 3, Item 5).
3.
Lower hydraulic jack until leaf spring assembly (Figure 3, Item 7) seats in upper spring bracket
(Figure
3,
Item
1) and remove hydraulic jack from spring seat (Figure 3, Item 6).
M10234DAA
6
7
5
4
3
2
1
Figure 3.
Rear Axle Spring Seat Wear Pads and Upper Bracket Installation.
4.
Position spring brake chamber bracket (Figure 4, Item 12) over upper spring bracket (Figure 4, Item 4) and
install with screw (Figure 4, Item 1), two washers (Figure 4, Item 2), lockwasher (Figure 4, Item 11), and nut
(Figure
4,
Item
10). Do not tighten nut.
5.
Install spring brake U-bolt bracket (Figure 4, Item 9) between brake chamber (Figure 4, Item 13) and brake
chamber bracket (Figure 4, Item 12) with U-bolt (Figure 4, Item 6), two washers (Figure 4, Item 15), and nuts
(Figure 4, Item 16). Tighten nuts 120 to 160 lb-ft (163 to 217 N·m).
6.
Position service brake chamber bracket (Figure 4, Item 19) over upper spring bracket (Figure 4, Item 4) and
install with screw (Figure 4, Item 17), two washers (Figure 4, Item 18), lockwasher (Figure 4, Item 24), and nut
(Figure 4, Item 23). Do not tighten nut.
7.
Install service brake U-bolt bracket (Figure 4, Item 22) between service brake chamber (Figure 4, Item 20) and
brake chamber bracket (Figure 4, Item 19) with U-bolt (Figure 4, Item 21), two washers (Figure 4, Item 25),
and nuts (Figure 4, Item 26). Tighten nuts 120 to 160 lb-ft (163 to 217 N·m).
8.
Install upper spring bracket (Figure 4, Item 4) with two screws (Figure 4, Item 3), lockwashers
(Figure
4,
Item
7), and nuts (Figure 4, Item 8). Tighten nuts 280 to 360 lb-ft (380 to 488 N·m).
9.
Tighten nuts (Figure 4, Items 10 and 23) 280 to 360 lb-ft (380 to 488 N·m).
TM 9-2320-272-23-3
0541
0541-4
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