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 283 of 590

a. Disassembly

1

2

3

Remove four screws (1) and four lockwashers (2).

Carefully separate rotating counter (3) from two

straight pins (4) in base (5). Discard lockwashers.

Remove two straight pins (4) only if damaged or if a

new rotating counter (3) is to be installed.

Support hub of spur gear (6) and drive out straight

pin (7).

Remove spur gear (6) from shaft of rotating

counter (3).

4

5

6

Drive out tapered pin (8).

Slide retaining ring (9) down spur gearshaft (10).

Remove spur gear (11) and retaining ring (9), and

slide spur gearshaft (10) from base (5).

7

Remove four screws (12), four lockwashers (13),

four flat washers (14), and rotating counter (15), with

spur gear attached, from two straight pins (16) in

base (5). Discard lockwashers.

8

Remove straight pin (17) and slide spur gear (18)

from shaft of rotating counter (15).

9

Remove two straight pins (16) only if damaged or if a

new rotating counter (15) is to be installed.

TM 9-1240-401-34&P

Change 1

5.1-49