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 960 of 1275

TM 9-2350-311-20-1

10-17 IDLER ARM ASSEMBLIES

This task covers:

a. Removal

b. Disassembly

c. Assembly

d. Installation

Tools

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

Lubricating gun (item 24, Appx H)

Socket wrench set (item 56, Appx H)

Torque multiplier (item 37, Appx H)

Torque wrench (item 71, Appx H)

Torque wrench (item 72, Appx H)

Materials/Parts

GAA grease (item 27, Appx D)

Gasket (item 122, Appx G)

Plug (item 103, Appx G)

Preformed packing (item 63, Appx G)

Preformed packing (item 64, Appx

G)

Seal (item 157, Appx G)

Spring pin (item 11, Appx G)

Equipment Condition~

Idler wheels and hubs removed (para 10-16)

Track adjuster disconnected at idler arm assembly

(para 10-15)

a. Removal

1

Remove four screws (1).

2 Remove idler arm assembly (2) and gasket (3) from idler arm housing (4). Discard gasket.

b. Disassembly

1 Remove screw (5), flat washer (6), idler arm cap (7), and spring pin (8). Discard spring pin.

10-43