TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
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TM 9-2350-311-34-2 The M140 alinement device is radioactively illuminated. Check for loss of luminescence, break- age, damage, or defects. If present, follow the procedures on page b. d. M140 Alinement Device. M140 alinement device (6) is used to aline or to check alinement of sighting equipment when positioned on a bracket next to cannon tube. M118A2/M118A3 elbow telescope sights through the M140 alinement device permitting check of crosshair positions. When mounted on hull bracket, M117/M117A2 panoramic telescope sights through M140 alinement device to check crosshair alinement. The M140 alinement device contains radioactive tritium gas (H 3 ). For information on DS/GS repairs of the M140 alinement device refer to TM 9-4931-710-14&P. Change 1 1-35