Hub and Drum Assembly (M129A4 Only)

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Installation and adjustment of wheel bearings

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TM-9-2330-380-14-P Semitrailer Van: Electronic Tactical 12-Ton 4-Wheel XM1063 (NSN 2330-01-224-9244) and M129A4 (NSN 2330-01-372-5642) Manual

Cleaning and Inspection

TM 9-2330-380-14&P

4-53. Hub and Drum Assembly (M129A4 Only)

This task covers:

a. Removal

b. Cleaningandinspection

c. Installation

d. Adjustment

Initial Setup:

Tools/Test Equipment:

EquipmentConditions:

General mechanic's tool kit (item 01, Appendix B)

Wheels removed (para. 3-4).

Guard press (item 04, Appendix B)

Automotive shop set (item 2, Appendix B)

Jack stand in place under axle.

Wheel bearing wrench (item 3, Appendix B)

Materials/Supplies:

Lock washer (6)

Gasket

Gravelguard

Drycleaningsolvent(item3,AppendixE)

Grease (item 5, Appendix E)

Brush (item 15, Appendix E)

a. Removal

NOTE

Steps 1 and 2 apply to left front hub and drum only. Do step 2 if hubometer or bracket is damaged and

must be replaced.

1. Remove two screws (1), lock washers (2) and bracket (3) with hubometer (4). Discard lock washers.

2. Remove screw (5), washers (6) and hubometer (4) from bracket (3).

NOTE

Two screws (1) and lock washers (2) on left front hub were removed in step 1.

3. Remove six screws (1), lockwashers (2) hub cap (7) and cap gasket (8). Discard lockwashers and

gasket.

4. Remove 10 flange nuts (9) and brake drum (10).

5. Bend tabs on tabbed washer (11) and remove 3-1/4 inch outer bearing nut (12), tabbed washer (11),

keyed washer (13) and 3-7/8 inch inner nut (14).

CAUTION

DO NOT remove studs (16) from hub unless stud(s) is damaged.

6. Remove hub (15) with studs (16).