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 186 of 590

TM 9-1240-401-34&P

5-13. M117/M117A2 PANORAMIC TELESCOPE MAINTENANCE INSTRUCTIONS

- continued

I

a. Disassembly - continued

11

12

13

14

15

16

17

18

19

20

21

Remove four shims (21) and two shims (22). Dis-

card shims.

Remove two windows (23), only if damaged.

Remove setscrew (24).

Loosen setscrew (25) and push elevation knob (26)

into the housing as far as possible. Tighten

setscrew (25).

Unscrew elevation knob (26) as far as possible

from shouldered shaft (27) and repeat step 14 as

necessary to remove elevation knob (26).

Remove setscrew (25) and shouldered shaft (27).

Remove and discard preformed packing (28).

Remove two plugs (29) and two preformed pack-

ings (30). Discard preformed packings.

Remove four machine screws (31), four lock-

washers (32), and two strikes (33). Discard lock-

washers.

Remove machine screw (34) and reset counter

knob (35).

Remove two machine screws (36), access cover

(37), and gasket (38). Remove preformed packing

(39) from access cover (37). Discard preformed

packing and gasket.

b. Repair

1 Remove corrosion, grease, and dirt from all parts.

Refer to TM 9-254 for cleaning instructions.

2 Visually inspect for missing or damaged parts.

3 Repair or replace parts in accordance with author-

ized parts listed in appendix D.

5-12