15 Coat gears with aircraft grease (item
8, appx C).
16 Apply a coat of adhesive (item 4, appx C) to edge of
cover assembly (13).
and four screws (11).
18 Recheck torque and backlash. Refer
CHECKING AND ADJUSTING COUNTER AND STOP ASSEMBLY
1 With M137 telescope mount and fixture level, and the
correction counter at zero, place gunner's quadrant
(1) on level bar (2).
2 Rotate elevation knob (3) to obtain an elevation of
1333 mils and then a depression of 89 mils (9911) as
read on elevation counter (4). The counter reading
shall be within 1.0 mil of the angle indicated by
gunner's quadrant (1). If not, proceed to step 3.
from cover assembly (7).
4 Remove cover assembly (7) from housing (8).
5 Determine whether elevation or depression meets
minimum travel (elevation 1333 mils or depression
9911 mils) by rotating elevation knob (3) to limits of
travel, and measuring with gunner's quadrant (1).