C1, TM 9-1240-318-35
Section III. FINAL TEST AND ADJUSTMENT
5-19. Reticle Plumb
Final test and adjustment is performed after overhaul
has been completed to ensure that the telescope is
serviceable according to established serviceability
5-20. Reticle Accuracy
standards. Any items containing defects disclosed by
the final inspection will be returned to the maintenance
shop for repair or adjustment.
Note. To vibrate the M120 or XM134 telescope,
either the mount, telescope M148 or mount,
telescope XM164 can be used for securing the
a. With the fixture setup,
3-10, place the telescope
in the dovetail
of its respective
a. Place mount, telescope M138 or mount,
mount and secure in place.
telescope XM164 on vibration fixture mounting plate and
secure in place. Place the telescope in the dovetail of
b. Sight through the telescope and observe if the
mount and secure in place with locking lever.
line of sight through the geometric axis of the telescope
reticle pattern (800 meter range line) is within 5.0 mils
b. Prior to other inspection operations, perform the
in azimuth and +4.0 mils in elevation to the geometric
axis of the fixture collimator reticle pattern.
5-17. Eyepiece Focus
c. If the line of sight (800 meter range line)
exceeds the tolerance specified in b above, check the
seating of telescope. Remove any burrs that would
prevent proper mating of dovetail mounting flange on to
mating dovetail of fixture mount.