TM-9-2320-272-24-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 2 OF 4
JUNE 1998
TM-9-2320-272-24-2 - Page 38 of 991
TM 9-2320-272-24-2
3-224. REAR HUB AND DRUM (M939/A1) MAINTENANCE (Contd)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Install dustshield (2) on inside of drum (1) with five washers (3) and screws (4).
Position hub (6) on drum (1).
Press wheel studs (5) through drum (1) and hub (6). Ensure studs (5) are seated.
Install inner bearing (10) and new inner bearing oil seal (9) in hub (6).
Using bearing replacer, install new wiper (8) on axle housing (7).
NOTE
Assistant will help with step 6.
Install hub (6), drum (1), new keyway insert (21), outer bearing (20), and new outer bearing
oil seal (19) on axle housing (7) with bearing adjusting nut (18).
Tighten bearing adjusting nut (18) while turning hub (6). Tighten bearing adjusting nut (18)
50 lb-ft (68 N•m).
Loosen bearing adjusting nut (18) 1/6-1/4 turn so washer (16) can be positioned to axle
housing (7) and adjusting nut pin (17).
Install outer bearing locknut (15) on axle housing (7). Tighten outer bearing locknut (15)
250-400 lb-ft (339-542 N•m).
Apply sealant to mating surfaces of axle shaft flange (12).
Install axle shaft (11) on hub (6) with ten washers (14) and screws (13). Tighten screws (13)
60-100 lb-ft (81-136 N•m).
3-646
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