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 238 of 590

TM 9-1240-401-34&P

5.1-6. DIRECT SUPPORT INITIAL INSPECTION

Item No.

Item To Be Inspected

1

M15 QUADRANT

2

3

4

5

COUNTER WINDOWS

Check for moisture. Look for broken, cracked, or chipped glass.

CORRECTION KNOB

ELEVATION KNOB

LEVEL VIALS

Procedures

Look for signs of mistreatment, such as dents, scuff marks, bare spots,

and missing parts. Inspect M15 quadrant for cleanness.

Operate correction knob. Check that operation is smooth without

binding or rough motion and that not more than 3 pound-inches (0.339

N-m) of torque is required to turn it throughout its travel from stop to

stop.

Operate elevation knob. Check that operation is smooth without binding

or rough motion and that not more than 8 pound-inches (0.904 N-m) of

torque is required to turn it.

Check light sources. Check that light is present even throughout the

level vial. Check that level vial graduations are present and legible.

Check that level vials are not cracked or broken and that covers rotate

smoothly.

5.1-4

Change 1