Section XX. LEFT-SIDE SUPPORT COVER ASSEMBLY

TM 5-6675-270-15

Section XX. LEFT-SIDE SUPPORT COVER ASSEMBLY

ing solvent. Clean the glass window with lens

6-77. General

tissue.

The left-side support cover assembly contains the

b. Inspection. Inspect the mirror mount, cover,

illumination mirror mount and plug-in lamp

and plug-in lamp bushing for dents, breaks, and

bushing. The left-side support cover also protects

excessive wear. Inspect all threaded surfaces for

the collimation level arm assembly.

damaged threads and wear.

6-78. Disassembly

c. Repair. Remove all burs. Replace defective

a. Remove the left-side support cover assembly

parts that cannot be repaired.

(para 5-24).

6-80. Assembly

b. Refer to figure 5-14 and disassemble the

a. Refer to figure 5-14 and assemble the left-

left-side support cover assembly.

side support cover assembly.

6-79. Cleaning, Inspection, and Repair

b. Install the left-side support cover assembly

a. Cleaning. Clean all metal parts with a clean-

(para 5-24).

Section XXI. VERTICAL COLLIMATION HOUSING AND

VERTICAL COLLIMATION LEVER ASSEMBLIES

6-81. General

6-83. Cleaning, Inspection, and Repair

The vertical collimation housing and vertical col-

a. Cleaning. Clean all metal parts with a clean-

limation lever assemblies are located in the left-

ing solvent. Clean and polish the prism and lenses

side of the U-frame. They contain the upper and

with a lens tissue dipped in grain alcohol or

lower vertical circle reading prisms and lens as-

acetone.

semblies, the upper horizontal circle reading prism

b. Inspection. Inspect the housing, bearing

assembly, prisms and lenses.

shell, and sleeve for cracks, dents, and excessive

wear.

6-82. Disassembly

c. Repair. Replace defective parts that cannot

a. Remove the vertical collimation housing and

be repaired.

the vertical collimation lever as an assembly (para

6-84. Assembly

5-25).

a. Refer to figure 6-9 and assemble the vertical

b. Refer to figure 6-9 and disassemble the

collimation housing and vertical collimation lever

vertical collimation housing and vertical collima-

assemblies.

tion level assemblies.

b. Install the vertical collimation housing and

vertical collimation lever assemblies (para 5-25).

VERTICAL CiRCLE ASSEMBLY

Section XXII.

6-87. Cleaning, Inspection, and Repair

6-85. General

The vertical circle assembly is located on the left

a. Cleaning. Clean all metal parts with a clean-

side of the U-frame and is connected to the tele-

ing solvent. Clean the vertical circle with a clean,

scope axis to provide vertical readinga for the

soft cloth moistened with a cleaning solvent, or

operator.

use lens tissue. (Clean all threaded surfaces with a

brush moistened in cleaning solvent.

6-86. Disassembly

b. Inspection. Inspect the circle for breaks,

a. Remove the vertical circle assembly (para

etchings, or other visible damage. Inspect the

5-26).

hardware for damaged threads.

b. Refer to figure 6-10 and disassemble the

vertical circle assembly.

6-15

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