TM 9-1240-400-34&P
CHECKING AND ADJUSTING CORRECTION COUNTER DIAL
1
With M137 telescope mount level and elevation
counter (1) set to "0000", check that correction
counter (2) is set to "0" when correction knob (3) is
rotated nine clicks from either stop position. If not,
proceed to step 3.
2 Remove two screws (4) and telescope mount shield
(5) to gain access to two setscrews (6) in correction
counter (2).
3
To position correction counter (2), loosen two
setscrews (6), obtain setting "0" in telescope mount
shield (5), then tighten two setscrews (6).
CHECKING AND ADJUSTING ELEVATION AND
CORRECTION COUNTERS ALINEMENT
1
With cover assembly (1) in place over telescope
mount subassembly (2), check that zeros (top, side,
and bottom) appear through two observation windows
(3) within 1/16 in. (1.6 mm).
2 If required, remove elevation counter (4) and pins (5),
then relocate and reassemble with next larger pins.
3 Apply a coat of adhesive (item 4, appx C) to edge of
cover assembly (1).
4
Replace cover assembly (1) and secure with four
screws (6) and four lockwashers (7).
5-65
