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 225 of 590

TM 9-1240-401-34&P

b. VISUAL INSPECTION

1 Check that all screws and lockwashers are present

and tight.

2 Check that mounting surfaces are clean and free of

burrs.

3 Check that M117/M117A2 panoramic telescope is

free of dirt, corrosion, and foreign matter.

4 Check that paint is not chipped.

5 Check that all parts are present and free of dam-

age.

c. COLLIMATION

1 Set azimuth fixture ring (1) to zero.

2 Set gunner’s aid counter (2) to 00-00 detent.

3 Rotate reset counter knob (3) until reset counter (4)

registers 3200.

4 Sight through M117/M117A2 panoramic telescope

eyepiece (5) and turn azimuth knob (6) and eleva-

tion knob (7) until M117/M117A2 panoramic tele-

scope reticle is in coincidence with reticle of

collimating projector (8).

5 Check that azimuth counter (9) registers 3200. If

not, proceed as follows:

a.

Remove cap and insert screwdriver into slot-

ted shaft located below azimuth knob (6).

b. Push in and rotate screwdriver until azimuth

counter (9) registers 3200.

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