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 672 of 828

TM 9–2350–311–20–2

18–4

18–1 M146 TELESCOPE MOUNT — CONTINUED

c.

Disassembly

1

Remove two machine screws (7) and two lockwashers (8). Discard lockwashers.

2

Remove chain assembly (9).

3

Remove three machine screws (10) and three lockwashers (11) to free three clamps (12) from elevation

slide (13). Discard lockwashers.

4

Remove cable assembly (14) by removing two cap screws (15) and two lockwashers (16). Discard lock-

washers.

d.

Assembly

1

Install cable assembly (14) to M146 telescope mount (6) with two cap screws (15) and two new lockwashers

(16).

2

Secure three clamps (12) to elevation slide (13) with three new lockwashers (11) and three machine screws

(10).

3

Assemble chain assembly (9) to M146 telescope mount (6) with machine screw (7) and new lockwasher (8).

4

Connect other end of chain assembly (9) to knob with other machine screw (7) and new lockwasher (8).

e.

Installation

NOTE

Clean mating surfaces of M146 telescope mount and brackets on howitzer mount to ensure proper

installation. Seat key securely at front of M146 telescope mount.

1

Aline eight holes on M146 telescope mount (6) with eight holes on cab.

2

Install four new lockwashers (5) and four cap screws (4).

3

Install four new lockwashers (3) and four cap screws (2).

4

Connect cab electrical connector to mount receptacle (1).