TM 9-1240-400-34&P
5-19. FINAL INSPECTION INSTRUCTIONS (CONT).
CHECKING M137 TELESCOPE MOUNT CANT CORRECTION
1 Set 500 mils into gunner's quadrant (1) and place on level bar (2).
2 Rotate handwheel (3) for 500 mil depression.
4 Rotate lower handwheel (5), to the right, to 177.8 mil cant angle.
5 Rotate elevation knob (6) and center bubble in cross-level vial (7).
6 Correction counter (8) should read 96.1 0.5 mils.
7 Repeat steps 4 thru 7, checking cant to the left.
8 Repeat steps 4 thru 8 for 800 and 1000 mil elevation. Connection should be 180.5 + 1.0 mils and 271.9 2.0 mils
respectively.
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