TM 5-6675-302-14&P
WARNING
c. Reassembly. Refer to figure
5-16 and
(2) Install the tribrach assembly paragraph
reassemble the target plate carrier.
4-9.
e. Adjustment. If, after the circular level has
d. Installation.
been adjusted (para 5-8), the target level bubble is
far off center, the target level is out of adjustment,
(1) Refer to figure 5-14 and install the target
Tighten or loosen the adjusting screw (13, fig. 5-16)
plate on the target plate carrier.
to bring the bubble to center.
Figure 5-14. Target plate, model USATS-79, removal and installation
Section VI. REPAIR OF BATTERY BOX, HAND LAMP AND
ELECTRICAL CABLE, AND EYEPIECE ADAPTER ASSEMBLY
5-20. General. The illumination system consists
of a battery box, with a rheostat to control the in-
tensity of light illuminating the target. A hand
lamp that plugs into the battery box is also provid-
ed for general external lighting purposes. An
eyepiece adapter fits over the eyepieces and pro-
vides illumination for the optical plummet.
5-21. Battery Box.
a. Disassembly. Refer to figure 5-17 for model
242406 or figure 5-18 for model USATS-79, and
disassemble the battery box.
b. Cleaning, Inspection and Repair.
Clean parts in a well-ventilated area.
Avoid inhalation of solvent fumes and
prolonged exposure of skin to cleaning
solvent. Wash exposed skin thoroughly.
Dry cleaning solvent (Fed. Spec.
P-D-680) used to clean parts is potential-
ly dangerous to personnel and property.
Do not use near open flame or excessive
heat. Flash point of solvent is 100F to
138F (38C to 59C).
(1) Clean all metal parts with cleaning solvent
and dry thoroughly. Wipe all corrosion from ter-
minals and contacts. Wipe dirt and foreign matter
from cables, lamp trunk, springs, washers, and
rheostat.
(2) Inspect the cables and contacts for cracked,
swollen, or damaged insulation, broken wires, and
defective terminals. Inspect the springs for bends,
breaks, and fatigue.
(3) Inspect the lamp trunk for cracks and other
damage. Inspect the rheostat for improper opera-
tion and other damage. Inspect the sockets for
cracks and wear. Inspect the springs for bends,
and fatigue. Inspect the contacts and slide lever
for wear, burrs, and bends.
5-18