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 589 of 828

TM 9–2350–311–20–2

Change 3

14–25

b.

Disassembly

1

Remove seal (9) from projectile access door (4) and discard.

2

Remove seal (10) and strip (10.1) from projectile access door (4) and discard.

3

Clean seal seats to remove dirt and old adhesive.

c.

Assembly

WARNING

Adhesives can burn easily, can give off harmful vapors, and are harmful to skin and clothing. To

avoid injury or death, keep away from open fire and use in well-ventilated area. If adhesive gets on

skin or clothing, wash immediately with soap and water.

1

Apply adhesive to cleaned seal seats and to new strip (10.1).

1.1

Install new strip (10.1) on projectile access door (4).

1.2

Apply adhesive to new seals (9 and 10).

2

Install new seals (9 and 10) on projectile access door (4).

d.

Installation

1

Install thrust washer bearing (8).

2

Install projectile access door (4) at the bottom of the bustle door assembly.

3

Install cap screw (6), two flat washers (7), and new self-locking nut (5) on projectile access door (4).

4

Install new shim(s) (3), as required, and catch strike (2) on projectile access door (4), using two cap screws

(1).

9

10

4

10.1