TM 9-2320-272-24-2
3-223. FRONT HUB AND DRUM (M939/A1) MAINTENANCE
THIS TASK COVERS:
c. Lubrication
a. Removal
d. Installation
b. Cleaning and Inspection
INITIAL SETUP:
REFERENCES (TM)
APPLICABLE MODELS
TM 9-214
M939/A1
TM 9-2320-272-10
TOOLS
TM 9-2320-272-24P
General mechanic's tool kit (Appendix E, Item 1)
EQUIPMENT CONDITION
Torque wrench (Appendix E, Item 145)
Wheel(s) removed (para. 3-218).
MATERIAL/PARTS
GENERAL SAFETY INSTRUCTIONS
Inner oil seal (Appendix D, Item 497)
Drive flange gasket (Appendix D, Item 164)
Drycleaning solvent is flammable and toxic. Do
Ten lockwashers (Appendix D, Item 350)
not use near an open flame.
Keep fire extinguisher nearby when using
GAA grease (Appendix C, Item 28)
Gasket sealant (Appendix C, Item 30)
drycleaning solvent.
Drycleaning solvent (Appendix C, Item 71)
Remove ten screws (11) and lockwashers (12) from drive flange (10) and hub (2). Discard
1.
lockwashers (12).
Install two screws (11) in threaded holes (13) to separate drive flange (10) from hub (2).
2.
Remove drive flange (10) and gasket (9), if present, from hub (2). Discard gasket (9).
3.
Remove two screws (11) from drive flange (10).
4.
Remove outer bearing locknut (8), bearing nut washer (7), bearing adjusting nut (6), and outer
5.
bearing (5) from spindle (4).
Remove hub (2) and drum (1) from spindle (4).
6.
Remove inner bearing oil seal (14) and inner bearing (15) from hub (2). Discard inner bearing oil
7.
seal (14).
Remove ten wheel studs (3) and hub (2) from drum (1).
8.
3-638
