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 147 of 590

TM9-1240-401-34&P

8

Drive out tapered pin (20) and remove bevel gear

(21).

9

10

11

12

13

14

15

16

17

Using adjustable spanner wrench, remove exter-

nally threaded nut (22).

Remove spring (23) and two flat washers (24),

Remove wormshaft (25) and related parts.

Remove self-locking nut (26), flat washer (27), and

bearing (28) from wormshaft (25). Discard self-

locking nut.

Drive out tapered pin (29) from bevel gear (30).

Remove bevel gear (30) from shaft of housing (31).

Remove two channels (32) from housing (31) by

removing two machine screws (33) and two

Iockwashers (34) from each channel. Discard

Iockwashers.

Remove two stops (35).

Remove plug (36), only if necessary for replace-

ment.

I b. Repair

I

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.

4-33