TM 5-6675-270-15
TELESCOPE AXIS AND 90 PRISM ASSEMBLIES
Section XXXI.
6-121. General
a. Cleaning. Clean all metal parts in a cleaning
The telescope axis assembly acts as a mount for
solvent. Clean and polish the prism with lens
the telescope objective, focus, reticle, and eye-
tissue dipped in grain alcohol or acetone.
piece assemblies, microscope assembly, 90 prism,
and associated parts. It is supported in the
b. Inspection. Inspect the prism sleeve, prism
U-frame by two axis bearings. The 90 prism
mount, and frame for dents and breaks. Inspect
directs the horizontal and vertical circle scale
the prism for chips, breaks, scratches, and etch-
readings and illumination from the left side of the
ings. Inspect the telescope axis and bearings for
U-frame to the microscope lens assembly.
cracks, breaks and burs.
c. Repair. Remove all burs. Paint all metal
6-122. Disassembly
surfaces where the paint has been scratched or
a. Remove the telescope axis and 900 prism as-
worn off. Replace defective parts that cannot be
semblies (para 5-34).
repaired.
6 - 1 2 4 . Assembly
telescope axis and 90 prism assemblies.
NOTE
scope axis and 900 prism assemblies.
The telescope axis (1, fig. 5-22) on model T16-
b. Install the telescope axis and 90 prism
MIL 66 has an oval shape; that on models T16-
assemblies (para 5-34).
MIL 68 and T16-68 DEG is square shaped.
Section XXXII. U-FRAME ASSEMBLY
6-125. General
a. Cleaning. Clean the U-frame with a cleaning
The U-frame assembly consists of the U-frame,
solvent.
right- and left-side support covers, horizontal
circle reading and illumination lens assemblies,
b. Inspection. Inspect the frame for cracks,
plate level illumination window, and associated
breaks, and burs. Inspect threaded surfaces for
hardware. The U-frame assembly forms a sup-
damaged or worn threads.
porting and housing structure for the telescope
c. Repair. Chase threaded parts having minor
and vertical circle assemblies and associated con-
thread damage. Remove burs. Replace a defective
trols.
U-frame.
6-128. Assembly
6-126. Disassembly
Assemble and install the U-frame assembly (para
Remove and disassemble the U-frame assembly
BATTERY BOX
Section XXXIII.
ing solvent. Remove all corrosion from terminals
6-129. General
and contacts. Wipe dirt and foreign matter from
The battery box stores the batteries which furnish
cables, trunk, rheostat, springs, and washers.
power to the hand light and electrical illumination
Clean the battery box, with a soft cloth moistened
assembly.
with a cleaning solvent and dry thoroughly.
6-130. Disassembly
b. Inspection. Inspect the cables for damaged
insulation, broken wires, and defective terminals.
Refer to figure 6-14 and disassemble the battery
Inspect the springs for bends, breaks, and fatigue.
box.
Inspect the trunk for splits, cracks, and other
damage. Inspect the rheostat for improper opera-
tion and damage. Inspect the sockets for cracks
a. Cleaning. Clean all metal parts with a clean-
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