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 223 of 590

TM 9-1240-401-34&P

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6 Set fixture adapter (7) on adapter support plate (8).

Do not clamp fixture adapter (7) to adapter support

plate (8) at this time.

7 Suspend a plumb line (9) to one side of the azi-

muth testing fixture (1).

8 Install collimator adapter (10) and collimating pro-

jector (11) on tube (12).

9 Install alinement gage assembly (13) on fixture

adapter (7).

10 Remove reflecting mimer assembly (14) from aline-

ment gage assembly (13).

11 Install collimating telescope (15) in alinement gage

assembly (13) and Ioosely claw in place by par-

tially tightening thumbscrew (16).

12 Adjust height of collimating projector (11) so that

line of sight from collimating projector (11) is in

same plane as line of sight from collimating tele-

scope (15).

13 Clamp collimator adapter (10) to tube (12).

14 Rotate fixture adapter (7) until collimating tele-

scope (15) reticle cross line intersection point is in

coincidence with plumb line (9).

15 Revolve collimating telescope (15) until vertical

reticle is in coincidence with plumb line (9).

16 Secure collimating telescope (15) by tightening

thumbscrew (16).

17 Rotate fixture adapter (7) until line of sight from

collimating telescope (15) is in same plane of line

of sight from collimating projector (11).

18 Sight through collimating telescope (15) and re-

volve collimating projector (11) until vertical reticle

line is in coincidence with collimating projector (11)

vertical reticle line.

19 Secure collimating projector (11) by tightening

screws of collimator adapter (10).

20 Remove collimating telescope (15) from alinement

gage assembly (13).