TM 5-6675-306-14
CAUTION
(1) Refer to figure 5-2 and remove the base plate
and footscrews.
Stop screw (2) has a left-hand thread.
KEY to fig. 6-2
(2) Refer to figure 5-4 and remove the locking
1. Dust cover (3)
6. Milled knob (3)
plate, lock knob, and circular level (para 5-8).
2. Stop screw 13)
7. Washer (3)
3 Base casting 11)
8. Washer (3)
c. Disassembly.
Refer to figure
and
4. Adjusting screw (3) 9. Machine screw 131
disassemble the lock knob and locking plate.
5. Adjustable nut (3)
10. Setscrew 13)
d. Cleaning, inspection and repair.
d. Cleaning, inspection and repair.
WARNING
WARNING
Dry cleaning solvent, P-D-680, used to
Dry cleaning solvent, P-D-680, used to
clean parts is potentially dangerous to
clean parts is potentially dangerous to
personnel and property. Avoid repeated
personnel and property. Avoid repeated
and prolonged skin contact. Do not use
and prolonged skin contact. Do not use
near open flame or excessive heat.
near open flame or excessive heat.
Flash point of solvent is 100 F.-138
Flash point of solvent* is 100 0 F.-138
F. (38 0 C.-59 0 C.)
F. (38C.-59C.-59C.)
(1) Clean all parts with an approved cleaning
(1) Clean all metal parts with an approved cleaning
solvent and dry thoroughly.
solvent and dry thoroughly. Wipe the level vial with lens
(2) Inspect the spindles for bends. Inspect all
tissue or a lens cloth.
threaded parts for worn or damaged threads.
(3) Replace all defective parts that cannot be
(2) Inspect the level vial for cracks, scratches, and
repaired.
broken vial tip. Inspect the locking plate, stop plate and
e Reassembly. Refer to figure 6-2 and
lever for bends, burrs, and cracks. Inspect the springs
reassemble the footscrews.
for cracks. Inspect all threaded parts for worn or
f Installation.
defective threads.
(1) Refer to figure 5-3 and install the footscrews.
(3) Remove all burrs and straighten bends.
(2) Refer to figure 5-2 and install the base plate.
(3) Refer to figure 4-3 and install the tribrach
(4) Replace all defective parts that cannot be
assembly.
repaired.
6-4. Locking Plate, Lock Knob and Circular Level
and
reassemble the locking plate and lock knob.
a. General. The locking plate is used to secure the
theodolite to the tribrach assembly. The lock knob is
f. Installation.
used to release the theodolite from the
tribrach.
The circular level is used to level the
(1) Refer to figure 5-4 and install the circular level,
theodolite.
locking plate, and lock knob.
b. Removal.
(2) Refer to figure 5-2 and install the base plate.
6-5
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