TM 5-6675-306-14
KEY to fig. 4-2:
theodolite in its carrying case is strapped in the
1. Screw (31
6.
Lever J3)
haversack, which in turn, is carried on the operator's
2. Screw (61
7.
Washer (3)
back.
b. Cleaning and Inspection.
3. Base
8.
Spring washer 13)
4. Rubber gasket
9.
Nut (3)
(1) Brush the haversack free of dust and dirt.
5 Desiccant container
Clean the straps with saddle soap.
(2) Inspect the haversack for damage and defects
4-12. Haversack
that would render it unserviceable. Repair or replace a
defective haversack.
carrying the theodolite when it is impractical to
carry the unit using the carrying case. The
Section VIII. SUNSHADE
4-13. General
clean parts is potentially dangerous to
personnel and property. Avoid repeated
The sunshade is push-fit on the telescope objective. It
and prolonged skin contact. Do not use
is held in place by spring action exerted by the
near open flame or excessive heat.
sunshade body. The sunshade is used to reduce glare
Flash point of solvent is 100 F.-138
of sunlight shining into the objective. When not in use it
F. (38 a C.-59 0C.)
is mounted on the objective so that the slotted portion
(1) Clean the sunshade with a clean cloth
fits over the front sight, and then twisted slightly to lock
dampened with an approved cleaning solvent.
it in place.
4-14. Sunshade
(2) Inspect the sunshade for bent or cracked parts.
(3) Replace defective sunshade.
a. Removal. Carefully pull the sunshade from
c. Installation. Gently push the sunshade over the
the telescope objective (fig. 2-13). If in stored
telescope objective so that edge of sunshade is against
position, twist sunshade up with front sight, then
front sight (fig. 2-13). To store, align slot in sunshade
pull sunshade from telescope objective.
with front sight; push sunshade over telescope objective
b. Cleaning and Inspection.
WARNING
and twist slightly to lock in place.
Dry cleaning solvent, P-D-680, used to
Section IX. TRIBACH ASSEMBLY
4-15. General
personnel and property. Avoid repeated
and prolonged skin contact. Do not use
The tribrach assembly consists of the locking plate,
near open flame or excessive heat.
footscrew, optical plumbing device, mounting flange,
Flash point of solvent is 100 F.-138 0
and base plate assemblies. Together they enable the
F. (38 0 C.-59 C.)
operator to quickly and accurately secure the theodolite
(1) Brush all dirt, dust, and foreign matter from the
to, and remove it from, the preleveled base which
tribrach components. Wipe all surfaces clean with a soft,
remains attached to the tripod head. By using it the
lint-free cloth moistened with an approved cleaning
operator can shift the instrument back and forth between
solvent. Thoroughly clean all bearing surfaces on which
established stations, as when closing a traverse, without
the tapered locking wedges ride.
having to level or realign the theodolite each time it is
moved.
4-16. Tribrach Assembly
(2) Inspect the tribrach, base plate, and spring plate
for cracks, and breaks. Inspect the three footscrews for
a. Removal. Refer to figure 4-3 and remove the
improper operation. They should turn smoothly and
tribrach assembly.
evenly, yet require a moderate amount of force exerted
b. Cleaning and Inspection.
by thumb and forefinger to turn without backlash.
Lubricate
bearing
surfaces
sparingly
before
WARNING
reassembling the tribrach assembly to the theodolite.
Dry cleaning solvent, P-D-680, used to
clean parts is potentially dangerous to
4-7
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