TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 968 of 1275

SECTION Ill. FINAL DRIVES AND UNIVERSAL JOINTS

10-21 FINAL DRIVE SPROCKETS AND HUBS

This task covers:

a. Removal

b. Installation

T

OO

I

S

Lubricating oil (item 49, Appx D)

General mechanic’s tool kit (item 64, Appx H)

Socket wrench set (item 56, Appx H)

Personel Required

Torque multiplier (item 37, Appx H)

Two

Torque wrench (item 71, Appx H)

Torque wrench (item 72, Appx H)

Track disconnected (para 10-6 or 10-7)

Materials/Parts

GAA grease (item 27, App

X

D)

a. Removal

NOTE

Hub with inner and outer sprockets attached may be removed as an assembly by

removing screws (1).

1 Remove 10 nuts (2) and 10 screws (3) from outer sprocket (4). Lift off sprocket.

Hub is very heavy. At least two personnel are required to remove.

2

3

Remove eight screws (1) from hub (5). Insert two screws in hub pilot holes. Tighten screws to pull hub away

from drive assembly (6). Lift off hub and inner sprocket (7) from drive assembly.

Remove 10 nuts (8) and 10 screws (9) holding hub (5) to inner sprocket (7). Lift off hub.

10-51

TM 9-2350-311-20-1

Equipment Conditions

WARNING