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 1047 of 1469
FRONT WHEEL BEARING ADJUSTMENT
1.
Raise vehicle until tire (Figure 1, Item 1) is clear off the ground.
2.
Remove ten screws (Figure 1, Item 7) and lockwashers (Figure 1, Item 6) from drive flange (Figure 1, Item 5)
and hub (Figure 1, Item 9). Discard lockwashers.
3.
Install two screws (Figure 1, Item 7) into two threaded holes (Figure 1, Item 8) to separate drive flange
(Figure
1,
Item
5) from hub (Figure 1, Item 9).
4.
Remove drive flange (Figure 1, Item 5) and gasket (Figure 1, Item 4) from hub (Figure 1, Item 9).
Discard
gasket.
5.
Remove two screws (Figure 1, Item 7) from drive flange (Figure 1, Item 5).
6.
Remove outer bearing locknut (Figure 1, Item 3) and bearing nut washer (Figure 1, Item 2) from spindle
(Figure
1,
Item
11).
7.
While rotating hub (Figure 1, Item 9), tighten outer bearing adjusting nut (Figure 1, Item 12) 50 lb-ft (68 N·m)
to set preload.
8.
Back outer bearing adjustment nut (Figure 1, Item 12) 1/6 to 1/4 turn so bearing nut washer (Figure 1, Item 2)
can be positioned to spindle (Figure 1, Item 11) and adjusting nut insert (Figure 1, Item 10).
9.
Install bearing nut washer (Figure 1, Item 2) and outer bearing locknut (Figure 1, Item 3) on spindle
(Figure
1,
Item
11). Tighten outer bearing locknut 250 to 400 lb-ft (339 to 542 N·m).
10.
Install gasket (Figure 1, Item 4) and drive flange (Figure 1, Item 5) on hub (Figure 1, Item 9) with ten lockwashers
(Figure 1, Item 6) and screws (Figure 1, Item 7). Tighten screws 60 to 100 lb-ft (81
to
136
N·m).
11.
Lower vehicle to ground.
TM 9-2320-272-23-3
0483
0483-2
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