TM-9-1240-401-34-P
TELESCOPE MOUNT M146: M118A2 AND M118A3; TELESCOPE MOUNT M145: M145A1; PANORAMIC TELESCOPE: M117 AND M117A2; FIRE CONTROL QUADRANT: M15; PERISCOPE: M42
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
JULY 1993
TM-9-1240-401-34-P - Page 300 of 590
TM 9-1240-401-34&P
5.1-24. M15 QUADRANT FINAL INSPECTION AND ADJUSTMENT - continued
d. COUNTER ASSEMBLY FINAL ADJUSTMENT
NOTE
M15 quadrant must be mounted on cross-
leveling fixture and test fixture adapter and
cross-leveling fixture must be at zero elevation
and cross-level.
1
2
3
4
5
6
7
Turn elevation knob until bubble in elevation fire
control level (1) is centered.
Turn cross-level knob until bubble in cross-level fire
control level (2) is centered.
Read elevation and correction counters. If numbers
other than zero appear, block teeth of spur gearshaft
(3).
Loosen three clamp screws on hub of correction
counter spur gear (4).
Hold hub with a small drill shank inserted in one of
three holes between screws, and turn spur gearshaft
(3) until elevation counter registers 0000 mils.
Hold spur gearshaft (3) stationary and turn hub of
correction counter spur gear (4) until correction
counter registers 00 mils.
Tighten hub screws.
5.1-66
Change 1
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