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 651 of 828

TM 9–2350–311–20–2

Change 2

17–13

17–4 NBC CONTROL BOX ASSEMBLY

This task covers:

a.

Removal

b.

Disassembly

c.

Repair

d.

Assembly

e.

Installation

f.

Testing

INITIAL SETUP

Applicable Configuration

M109A4/M109A5 howitzers

Tools

Artillery and turret mechanic’s tool kit

(SC 5180–95–CL–A12)

Materials/Parts

Enamel (item 13, Appx D)

Gasket (item 102, Appx G)

Gasket (item 103, Appx G)

Lockwashers (4) (item 52, Appx G)

Lockwashers (4) (item 62, Appx G)

Lockwashers (6) (item 63, Appx G)

Lockwashers (4) (item 64, Appx G)

Lockwashers (4) (item 79, Appx G)

Lockwashers (2) (item 85, Appx G)

Packing with retainer (item 42, Appx G)

Equipment Condition

CAB POWER switch to OFF (TM 9–2350–311–10)

Vehicle MASTER switch to OFF (TM 9–2350–311–10)

a.

Removal

1

Disconnect cab power lead assembly (1) from J1 connector (2) of distribution box (3).

2

Disconnect NBC power lead assembly (4) from J2 connector (5) of distribution box (3).

3

Remove four cap screws (6), four lockwashers (7), four lockwashers (8), and distribution box (3) from

mounting blocks. Discard all lockwashers.

6

7

8

3

1

2

5

4