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 252 of 590

TM 9-1240-401-34&P

5.1-14. M15 QUADRANT MAINTENANCE INSTRUCTIONS - continued

a. Disassembly

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2

3

4

5

6

7

8

9

10

11

Loosen one of two setscrews in notches in detent

plate of knob assembly (1).

Remove three screws (2) and three lockwashers (3).

Pull base (4) carefully off two straight pins (5).

Discard lockwashers.

Remove knob assembly (1) and preformed packing

(6). Discard preformed packing.

Remove two straight pins (5), only if damaged.

Remove two screws (7) and identification plate (8),

only if damaged.

Remove instrument light (9), two screws (10), plate

spacer (11), and spring tension clip (12) from

housing, only if damaged.

NOTE

Electrical cover of level assembly must be

removed to permit removal of cover assembly.

Remove tapered pin (13), knob (14), spring tension

washer (15), recessed washer (16), and preformed

packing (17). Discard preformed packing.

Remove nine screws (18) and nine lockwashers

(19) and carefully work cover assembly (20) off two

straight pins (21) in housing. Discard lockwashers.

Remove and discard gasket (22).

Remove two setscrews (23), only if damaged.

Remove two straight pins (21), only if damaged.

5.1-18

Change 1