d. Cleaning, Inspection, and Repair.
(2) Refer to figure 52 and reassemble the
telescope eyepiece end.
(1) Clean all metal parts with an approved
(3) Install the telescope eyepiece (par. 50).
cleaning solvent and dry thoroughly.
Clean the reticle mirror with a soft cloth
e. Installation.
moistened with an approved cleaning
(1) Refer to figure 51 and install the
solvent.
telescope objective end.
(2) Inspect the objective telescope washer,
(2) Refer to figure 49 and install the
objective lens housing, objective lens
telescope eyepiece end.
ring, and sunshade for dents, burs,
(3) Install the microscope (par. 102).
cracks, and breaks. Inspect the reticle
104. Reticle Mirror
mirror for scratches or damage. Inspect
a. General. The reticle mirror assembly is located
the lens and lens assembly for scratches,
in the top of the telescope axis and provides illumination
chips, cracks, and etchings.
of the reticle assembly when the electric illumination
(3) Remove all burs. Replace all defective
system is used.
parts which cannot be repaired.
b. Removal. Refer to figure 51 and remove the
e. Reassembly. Refer to figure 53 and reassemble
reticle mirror.
the reticle mirror.
c. Disassembly.
Refer to figure 53 and
f. Installation. Refer to figure 51 and install the
disassemble the reticle mirror.
reticle mirror.
Section X. MICROMETER
(4)
Inspect the bearing bracket,
105. General
retaining mount, levers, axis, and cam
The micrometer functions with both the vertical
wheel for bends, burs, and cracks.
circle and the horizontal circle.
The vertical and
Inspect the springs for distortion, breaks,
horizontal circles cover the degrees and minutes down
to 10-minute readings. The micrometer refines these
readings, through a 4-minute interval down to and
including 0.2-second readings.
106. Micrometer
a. Removal. Refer to figure 54 and remove the
micrometer.
b. Disassembly.
Refer to figure 55 and
disassemble the micrometer.
c. Cleaning, Inspection, and Repair.
(1) Clean all metal parts with an approved
cleaning solvent and dry thoroughly.
Clean the lens, glass plates, and prisms
with a lens tissue or lens cloth.
(2) Clean the micrometer circle with a lens
tissue or lens cloth, making sure that no
lint is left on the face of the circle after
cleaning.
(3) Inspect the prisms, lens, and glass plates
for chips, cracks, scratches, and etching.
Inspect the micrometer cover for burs,
Figure 54. Micrometer, removal and installation.
cracks, and wear.
69
AGO5078A