TM-9-2350-311-20-2

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

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS

DECEMBER 1993

TM-9-2350-311-20-2 - Page 267 of 828

TM 9–2350–311–20–2

Change 2

5–11

5–6

ADJUSTER LEAF SPRING

This task covers:

a.

Removal

b.

Disassembly

c.

Inspection

d.

Assembly

e.

Installation

f.

Adjustment

INITIAL SETUP

Tools

Artillery and turret mechanic’s tool kit

(SC 5180–95–CL–A12)

Pipe wrench (item 15, Appx H)

Spacer (Figure E–3, Appx E)

Spanner wrench (item 17, Appx H)

Materials/Parts

Cotter pin (item 41, Appx G)

GAA (item 17, Appx D)

Masking tape (item 37, Appx D)

Straight headless pin (item 4, Appx G)

Equipment Condition

Breech mechanism disassembled and breechblock

assembly removed (TM 9–2350–311–10)

a.

Removal

WARNING

Cannon tube may slide out of battery and harm personnel if not placed at zero elevation.

1

Place cannon tube at zero elevation. If weapon is to be left unattended, secure cannon tube to prevent elevation.

2

Secure shaft collar (1) with spacer,

remove cotter pin (2) and slotted nut (3) from recuperator piston shoul-

dered shaft (4) and push cannon assembly out of battery until breech mechanism leaf spring adjuster clears

end of rammer. Discard cotter pin.

3

Close breechblock carrier assembly (5) and rotate operating crank (6) clockwise as far as it will go. Remove

headless shoulder pin (7).

2

4

3

5

6

7

1

SPACER