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 259 of 590

TM 9-1240-401-34&P

c. Assembly

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Apply grease (item 6, appx B) to large diameter of

gear shaft (1).

Apply grease (item 7, appx B) to new preformed

packing (2) and install into groove on gear shaft (1).

Apply grease (item 6, appx B) to shaft of gear shaft

(1) and to 12 key washers (3).

With keys facing away from gear, install 12 key

washers (3) and flat washer (4) on gear shaft (1).

If removed, install headed straight pin (5) into detent

plate (6).

Apply grease (item 6, appx B) to surface of detent

plate (6) where ball (7) rides.

Install gear shaft (1) and related parts into detent

plate (6).

Install new preformed mechanical felt (8) into groove

of detent plate (6).

Apply lubricating oil (item 9, appx B) to preformed

mechanical felt (8).

Apply grease (item 6, appx B) to spring (9) and

install in knob (10).

Apply grease (item 6, appx B) to detents of detent

plate (6) and install ball (7) in one of the detents.

Aline spring (9) with ball (7) placed in detent of

detent plate (6).

Aline hole in gear shaft (2) with hole in knob (10)

and install headless grooved pin (11).

Rotate knob (10) clockwise, then counterclockwise

from stop to stop to ensure that stops are engaging.

Install two setscrews into detent plate (6). Do not

tighten.

Change 1

5.1-25