TM-9-2350-311-34-2
CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM
TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL
SEPTEMBER 1994
TM-9-2350-311-34-2 - Page 55 of 552
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.
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