TM 5-6675-302-14&P
CHAPTER 2
INSTALLATION AND OPERATING INSTRUCTIONS
Section I. SERVICE UPON RECEIPT OF MATERIAL
2-1. Inspecting and Servicing the Equipment.
a. Inspect the entire set for missing components,
loose or missing mounting hardware.
b. Check the target set against the packing list
and be sure all items are with the unit.
c. Inspect the target set to make sure no damage
has incurred during shipment.
d. Inspect the tripod assembly (fig. 2-1) for
damage or missing tripod head cover, damaged
legs, and cut or broken leather strap or carrying
strap on model 242406 only. Inspect the cover
bracket and battery box bracket for insecure
mounting. Unbuckle the leather strap and open the
tripod legs to permit access to the tripod accessory
case. Inspect tripod accessory case for insecure
mounting to the tripod, torn seams, and loose or
missing fastener. Make sure the case contains a
tripod wrench and plumb bob assembly (fig. 2-3).
For model USATS-79 make sure the case contains
a key, sockethead and plumb bob assembly (fig.
2-2).
e. Inspect the battery box and components (fig.
2-5 or 2-6) for dents, cracks, missing or broken
clamps, and other damage. See that the lid closes
easily and can be clamped securely to the box. In-
spect all electrical contact points for corrosion and
defects. Run the rheostat knob through its travel,
making sure the movement is smooth and without
binding. Inspect the two dummy batteries for loose
or dirty contacts. See that the four spare lamps are
secure in the mounting holes and in good condi-
tion. Inspect the hand lamp assembly and elec-
trical cable for defective wiring and connector
plugs. Inspect the hand lamp assembly for a crack-
ed or broken case, defective lamp, or damaged
switch. Inspect the electrical illumination
assembly (model 242406), or screw-in lamp
assembly (model USATS-79) for defective wiring,
lamp, or connector plug. Replace defective parts.
2-2. Installation of Separately Packed Com-
ponents. There are no separately packed com-
ponents with the target set.
2-3. Installation or SettingUp Instructions.
a. Refer to figure 2-4 and erect the tripod over
the station point and install the plumb bob
assembly.
b. Remove the battery box from the carrying
case and secure it to the battery box bracket (fig.
2-1) located on the tripod leg, or model USATS-79
(fig. 2-6).
c. Mount the tribrach onto the tripod head.
Center the tribrach precisely over the station; level
the tribrach, utilizing the level screws and circular
level.
d. For model 242406 only, mount the target onto
the tribrach. Install the light concealing hood and
hood cone (fig. 2-5), if required. Install the reflector
and illumination assembly (fig. 2-5), if required.
e. For model USATS-79 only, mount the target
plate carrier onto the tribrach (fig. 2-9). If required,
slide the reflector onto the target plate and mount
the screw-in lamp assembly to the reflector. If re-
quired, slide the light concealing hood onto the
target plate.
2-4. Equipment Conversion.
a. General. During night or dark-day operation,
the target is illuminated by installing the illumina-
tion assembly (model 242406, fig. 2-8) or screw-in
lamp assembly (model USATS-79, fig. 2-9), which
is contained in the carrying case. An eyepiece
adapter assembly (fig. 2-8) fits over the optical
plummet eyepiece and provides illumination for
the optical plummet.
b. Night or Dark-Day Operations. Refer to
figure 2-8 illumination assembly (model 242406),
or refer to figure 2-9 and install the screw-in lamp
assembly (model USATS-79).
2-1
