9 Apply sealing compound (item 13, appx B) to
e. RETICLE ACCURACY INSPECTION
1 View through M118A2/M118A3 elbow telescope
eyepiece (1). Check that angular value between
zero range mark and maximum range mark (60-mil
line) is 60 0.5 mils. Check that boresight mark of
the M118A2/M118A3 elbow telescope reticle is on
the plus 20-mil mark of the collimating projector (2)
and the 60-mil mark of the M118A2/M118A3 elbow
telescope reticle is on the 40-mil mark of the
collimating projector (2).
If error exists, send M118A2/M118A3 elbow tele-
scope to depot maintenance.
View through M118A2/M118A3 elbow telescope eye-
piece (1) and check that the boresight mark is 20 roils (
1 roil) above the geometric axis of the target of collimat-
ing projector (2) and that the vertical reticle line is in co-
incidence with the vertical target line within 0.5 mil.
g. LEVEL ADJUSTMENT
Check that level (1) vial bubble is within the center
graduation marks of the level(1) vial.
Loosen threaded ring (2).
Engage fabricated eccentric tool into holder (3) and
threaded ring (2).
Insert a straight blade screwdriver through the cen-
ter hole in the eccentric tool.
Adjust cam (4) until level vial bubble is centered.
Tighten threaded ring (2), being careful not to dis-
turb setting of level vial.