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 299 of 590

TM 9-1240-401-34&P

7

Install M15 quadrant on quadrant mounting fixture

(5) (fig. C-12, appx C) with four bolts.

8

Position quadrant mounting fixture (5) on drill press

table with M15 quadrant placed in upright position.

9

Using cross-level knob (6), adjust cross-level bubble

in fire control level (7) until bubble centers.

10

Reposition quadrant mounting fixture (5) with

elevation quadrant facing upward.

11

Drill with a number 13 drill bit and ream for a 3/16-

inch straight pin (2).

12

Loosen screw (4) and remove shims previously

installed between bar (1) and housing (8). Seal over

screw (4) using sealing compound; (item 13, appx

B).

13

Aline holes drilled and reamed in bar (1) and

housing (6) and install straight pin (2).

14

Install screw (4) into recess of bar (1) but do not

tighten.

15

Remove M15 quadrant from quadrant mounting

fixture (5) and reinstall on test fixture adapter.

Change 1

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