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 136 of 590

TM 9-1240-401-34&P

4-15. LEVEL ASSEMBLY MAINTENANCE INSTRUCTIONS - continued

I

b. Disassembly

I

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

1

Remove threaded ring (4), using fabricated eccen-

tric tool.

Remove cell (5); slide cross-level (6) from bracket

(7) and remove cover (8).

Remove headless straight pin (9), only if damaged.

Remove machine screw (10), Iockwasher(11 ),

electrical connector cover (12), and LED (13). Dis-

card Iockwasher.

Using 11/1 6 and 45/64 inch tubular spanner

wrench, remove threaded ring (14).

Remove electrical lead (15) and lens (16).

Remove threaded ring (17) using fabricated eccen-

tric tool.

Remove cell (18); slide pitch level (19) from

bracket (7) and remove cover (20).

Remove headless straight pin (21), only if dam-

aged.

Remove window (22), only if necessary for replace-

ment.

Remove machine screw (23), Iockwasher (24),

electrical connector cover (25), LED (26), and ring

spacer (27). Discard Iockwasher.

Remove ring spacer (27) from LED (26).

Using 11/1 6 and 45/64 inch tubular spanner

wrench, remove threaded ring (28).

Remove electrical lead (29) and lens (30).

Remove two rivets (31 ) and mirror (32), only if nec-

essary for replacement.

Remove two rivets (33) and mirror (34), only if nec-

essary for replacement.

c. Repair

I

1

Remove corrosion, grease, and dirt from all parts.

Refer to TM 9-254 for cleaning instructions.

4-22