TM-9-1240-401-34-P

TELESCOPE MOUNT M146: M118A2 AND M118A3; TELESCOPE MOUNT M145: M145A1; PANORAMIC TELESCOPE: M117 AND M117A2; FIRE CONTROL QUADRANT: M15; PERISCOPE: M42

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

JULY 1993

TM-9-1240-401-34-P - Page 317 of 590

6-7

TM 9-1240-401-34&P

I

c. Assembly

1

2

3

4

5

6

7

8

9

10

11

12

Apply sealing compound to opening of M42 peri-

scope and install window (25).

Install seal (24) and retaining ring (23); secure with

thru new Iockwashers (22) and three machine

screws (21 ).

If removed, install two headless straight pins (20).

Apply adhesive to cover assembly (19) and install

on M42 periscope. Secure with 12 new lock-

washers (18) and 12 machine screws (17).

Apply sealing compound to opening of M42 peri-

scope and install window (16).

If removed, install two headless straight pins (15).

Apply adhesive to plate and mirror (14) and install

on M42 periscope. Secure with 12 new lock-

washers (13) and 12 machine screws (12).

Install two retaining plates (11) and secure with

four new Iockwashers (10) and four machine

screws (9).

If removed, install two headless straight pins (8).

Install purging machine screw (7).

Install retaining strap (6) on purging valve stem (5).

Apply adhesive to threaded portion of purging

valve stem (5) that screws into periscope housing.

Install purging valve stem (5), valve core (4), and

air valve cap (3).

Install identification plate (2) and secure with two

machine screws (1).