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 296 of 828

TM 9–2350–311–20–2

5–40

5–14 M42 PERISCOPE COVER DOOR

This task covers:

a.

Removal

b.

Installation

INITIAL SETUP

Tools

Artillery and turret mechanic’s tool kit

(SC 5180–95–CL–A12)

Materials/Parts

Lockwashers (4) (item 81, Appx G)

Lockwashers (6) (item 83, Appx G)

Spring pin (item 135, Appx G)

References

TM 750–116

a.

Removal

1

Remove two “S” hooks (1), quick release pin (2), and chain (3).

2

Remove spring pin (4) and cover door (5). Discard spring pin.

3

Remove four cap screws (6), four lockwashers (7), and spacer plate (8). Discard lockwashers.

4

Remove six cap screws (9), six lockwashers (10), and cover (11). Discard lockwashers.

b.

Installation

1

Install cover (11) with six new lockwashers (10) and six cap screws (9).

2

Install spacer plate (8) with four new lockwashers (7), and four cap screws (6).

3

Install cover door (5) with new spring pin (4).

4

Install two “S” hooks (1), chain (3), and quick release pin (2).

9

10

9

10

11

6

7

4

1

3

1

2

5

8