TM 9-2320-280-20-2
6-14. GEARED HUB SPINDLE BEARING ADJUSTMENT
This task covers:
Adjustment
INITIAL SETUP:
Tools
Manual References
General mechanic’s tool kit:
TM 9-2320-280-10
automotive (Appendix B, Item 1)
TM 9-2320-280-24P
Special Tools
Equipment Condition
Wrench (Appendix B, Item 127)
Wheel removed (para. 8-3).
Materials/Parts
General Safety Instructions
Lockwasher (Appendix G, Item 121)
Ensure locktab on lockwasher is bent completely
Sealer (Appendix C, Item 39)
into slot on retaining nut.
Sealing compound (Appendix C, Item 45)
Grease (Appendix C, Item 22)
Adjustment
NOTE
1.
2.
3.
4.
5.
6.
7.
8.
9.
6-38
Have drainage container ready to catch oil.
Remove drainplug (4), and drain geared hub (1). Install drainplug (4) into geared hub (1). Tighten
drainplug (4) to 8-13 lb-ft (11-18 N m).
Remove four capscrews (7), washers (6), and steering arm cover (5) from geared hub (1).
NOTE
For new configuration, two locktabs must be bent away from locknut
for removal.
Bend locktab (12) on lockwasher (9) away from retaining nut (10).
Using retaining nut wrench, remove retaining nut (10) and lockwasher (9) from spindle (8). Discard
lockwasher (9).
NOTE
If four-slotted retaining nut TN-07 is present, it is recommended
to replace it with eight-slotted retaining nut 12342680.
Apply grease to face of retaining nut (10) and install lockwasher (9) and retaining nut ( 10) on
spindle (8).
Using retaining nut wrench, tighten retaining nut (10) to 35-45 lb-ft (47-61 N m).
Rotate spindle (8) five full rotations clockwise and five full rotations counter clockwise to properly
seat bearings.
Loosen retaining nut (10) until it is finger tight, then retighten nut to 23-27 lb-ft (31-37 N m).
W A R N I N G
Ensure locktab on lockwasher is bent completely into slot on
retaining nut. Eight-slotted retaining nut provides additional
security by enabling two locktabs on lockwasher to be bent into
slots on retaining nut. Failure to do this may cause injury to
personnel or damage to equipment.
NOTE
For new configuration, two locktabs must be bent into slots on retaining nut.
It may be necessary to slightly loosen or tighten retaining nut to gain proper
alignment with locktabs.
Determine which locktab (12) on lockwasher (9) aligns with slot (11) in retaining nut (10). Bend
locktab (12) into slot (11) on retaining nut (10).
