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 264 of 828

TM 9–2350–311–20–2

5–8

Change 2

5–4

FIRING MECHANISM HOUSING

This task covers:

a.

Disassembly

b.

Inspection

c.

Assembly

INITIAL SETUP

Tools

Artillery and turret mechanic’s tool kit

(SC 5180–95–CL–A12)

Materials/Parts

Spring pin (item 25, Appx G)

Equipment Condition

Firing mechanism removed (TM 9–2350–311–10)

Firing mechanism housing removed

(TM 9–2350–311–10)

a.

Disassembly

1

Place firing mechanism housing (1) on solid surface.

2

Remove spring pin (2) and discard.

3

Remove cartridge extractor (3).

b.

Inspection

Inspect for broken cartridge extractor (3). Replace if required.

c.

Assembly

1

Install cartridge extractor (3).

2

Install new spring pin (2).

3

2

1