TM-9-1240-400-34-P
TELESCOPE; PANORAMIC: M115, ELBOW: M139, MOUNT: M138 AND M137
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1993
TM-9-1240-400-34-P - Page 130 of 344
TM 9-1240-400-34&P
Table 4-2.
DIRECT SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4.
WORM (6) DOES NOT MOVE TELESCOPE SOCKET 444.45 MILS ABOVE OR BELOW CENTRAL POSITION
WITH LEVER (4) UNLOCKED.
a. Check for binding.
Repair adapter assembly.
Refer to page 4-6.
b. Check for loose adjusting nut (5).
Adjust nut (5).
Refer to page 4-6.
EXTENSION LIGHT
5.
LIGHT (7) DOES NOT OPERATE.
Observe visually.
a.
Check shroud assembly.
Refer to page 4-13.
b.
Check for break in wire.
6.
LIGHT INTENSITY DOES NOT CHANGE WHEN RHEOSTAT KNOB (8) IS ADJUSTED.
Observe visually.
Repair bracket assembly.
Refer to page 4-13.
4-5
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