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 555 of 828

TM 9–2350–311–20–2

Change 2

12–13

16.1

Refer to para 2–7 for procedures on installing decal (11.6), if removed.

16.2

Install two inserts (11.5) if removed.

16.3

Install shims (11.4), catch (11.3), two new lockwashers (11.2), and two cap screws (11.1).

d.

Installation

1

To install cupola cover (1), support cupola cover in upright position. Install flat washers (9) and metallic bar

tube (8).

2

Coat 12 flat springs (2) with grease. Install 12 flat springs with cupola cover (1) at a 97

°

angle from closed

position.

3

Install spacer rings (7), spacer plates (6), and anchor (5).

4

Install two new lockwashers (4) and two cap screws (3).

5

Close cupola cover (1) and engage latch to keep cupola cover in position.

1

8

2

9

7

6

5

3

4

97

°

REMOVAL

ANGLE

HATCH

11.1

11.2

11.4

11.5

11.6

1

11.3