Figure 66. Leveling screws, horizontal circle drive, illumination socket, and horizontal
circle housing, removal, disassembly, reassembly, and installation.
and damage. Inspect the point screw,
d. Adjustment.
Adjust the leveling screws (par.
knob, nut, and cover for burs, bends, and
cracks. Inspect the screws for worn or
118. Horizontal Circle Drive
damaged threads and heads.
a. Removal and Disassembly. Refer to figure 66
(3) Remove all burs and replace defective
and remove and disassemble the horizontal circle drive.
parts.
b. Cleaning, Inspection, and Repair.
c. Reassembly and Installation.
(1) Clean all metal parts with an approved
(1) Refer to figure 66 and reassemble and
cleaning solvent and dry thoroughly.
install the leveling screws.
(2) Inspect the drive and sleeve for wear,
(2) Install the star plate (par. 54).
burs, rust, and damage. Inspect the two
washers for wear and defects.
80
AGO 5078A
