TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
Page 238 of 344
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