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 93 of 344
TM 9-1240-400-34&P
2-17.
M115 PANORAMIC TELESCOPE FINAL INSPECTION INSTRUCTIONS (CONT).
COUNTER OPERATION AND ADJUSTMENT
1
Reset counter (1) must follow when deflection
knob (2) is rotated.
2
Push in and rotate reset knob (3) to return reset
counter (1) to 3200 mils.
3
If requirements in steps 1 and 2 cannot be met,
replace reset counter.
Refer to page 2-42.
4
Rotate gunner’s aid knob (4) 50 mils in window
(5) and note that deflection counter (6) increases
50 mils.
5
Rotate gunner’s aid knob (4) 50 mils in window
(7) and note that deflection counter (6)
decreases 50 mils.
6
If requirements of steps 1 and 2 cannot be met,
replace gunner’s aid counters (5 and 7).
Refer
to page 2-42.
7
Set both counters to "00".
8
If the displays are not centered in the counter
windows, remove overlay assembly (8).
Refer to
page 2-42.
9
Remove setscrews (9 and 10) and adjust
setscrews (11 and 12) to center displays.
Install
setscrews (9 and 10) and overlay assembly (8).
Refer to page 2-42.
10
If requirements of steps 7 and 8 cannot be met,
replace gunner’s aid counters (5 and 7) and
differential gear (13).
Refer to page 2-42.
2-76
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