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 947 of 1275

10-12 ROAD WHEEL ARMS

This task covers:

a. Removal

b. Installation

INITIAL SETUP

T

OO

I

S

Personnel Required

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

Two

Socket wrench adapter (item 3, A

PPX

H)

Socket wrench set (item 56, A

PPX

H)

Torque multiplier (item 37, A

PPX

H)

Road wheel removed (para 10-10)

Torque wrench (item 71, A

PPX

H)

Shock absorber disconnected for road wheel arms 1 and

7 (para 10-19)

MateriaIs/Parts

Torsion bar removed (para 10-13)

Preformed packing (item 109, Appx G)

a. Removal

1 Remove eight screws (1).

WARNIN G

Road wheel arm assembly is heavy: over 100 lb (45.4 kg). Two personnel are

required to remove.

2 Lift off road wheel arm assembly (2) to remove.

3 Remove preformed packing (3) from road wheel arm assembly (2). Discard preformed packing.

b. Installation

WARNIN G

Road wheel arm assembly is heavy: over 100 lb (45.4 kg). Two personnel are

required to install.

1 Install new preformed packing (3) on road wheel arm assembly (2).

2

Install eight screws (1) on road wheel arm assembly (2). Torque screws to 160-200 Ib-ft (217–271 N·m).

10-30

TM 9-2350-311-20-1