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 224 of 590

TM 9-1240-401-34&P

5-26. M117/M117A2 PANORAMIC TELESCOPE FINAL INSPECTION AND ADJUSTMENT

- continued

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a. SETTlNG UP AZIMUTH TESTING FIXTURE - continued

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Install reflecting mirror assembly (14) on alinement

gage assembly (13).

Remove lamp assembly (17) and diffusion disk

from collimating projector (11).

Replace lamp assembly (17) with partial reflector at

approximately a 45° angle.

Sight through collimating projector (11) and adjust

collimating projector (11) and fixture adapter (7)

until image of test reticle, as reflected by reflecting

mirror assembly (14), is superimposed on test

reticle. Adjust collimating projector (11) in elevation

and fixture adapter (7) in defelction.

Clamp fixture adapter (7) in place with three cam-

Iock screws (18).

Remove alinement gage assembly (13) from fixture

adapter (7).

Set collimating projector (11) to 88 yards (80 me-

ters).

Install diffusion disk on collimating projector (11).

Install lamp assembly (17) on collimating projector

(11).

Install M117/M117A2 panoramic telescope (19) on

fixture adapter (7) and secure with two latches

(20).

NOTE

Ensure that dioptometer (21) is adjusted to

present a sharp, clear image of the diop-

tometer reticle.

Install dioptometer (21) in dioptometer holder (22)

on surface gage (23).

Adjust height of dioptometer (21) to height of tele-

scope eyepiece (24).

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