48. Pack Rack
Wipe the rubber washer clean with
a soft cloth.
a. General.
The pack rack (fig. 12) is used for carrying the
(b) Inspect all threaded surfaces for
theodolite in its carrying case. The theodolite, in its
worn or damaged threads. Inspect
carrying case, is strapped in the pack rack which in turn
the lever nuts, slide levers, and
is carried on the operator's back.
washers for burs and worn surfaces.
(c) Inspect the base for cracks and a
broken casting. Inspect the collar
b. Cleaning and Inspection.
for bends, breaks, and out-of-round.
(1) Clean all metal parts with an approved
(d) Inspect the rubber washer for
cleaning solvent and dry thoroughly.
damage or hardening because of
Clean the straps with saddle soap.
age or excessive heat.
(2) Inspect the pack rack for damage and
(e) Remove all burs from the base,
defects that would render it unserviceable.
bolts, slide levers, lever nuts, and
Repair or replace a defective pack rack.
collar. Straighten minor bends in
the collar and washers. Replace all
defective parts.
(4) Reassembly. Refer to figure 29 and
reassemble the base.
(5) Installation. Install the base (par. 7).
c. Desiccant and Container.
(1) Removal.
Remove the desiccant
container (b above).
(2) Disassembly. Refer to figure 30 and
disassemble the desiccant container.
(3) Cleaning and inspection.
(a) Clean all metal parts with an
approved cleaning solvent and dry
thoroughly.
(b) Inspect the sections of the container
for bends, breaks, and damaged
threads.
(c) Inspect the desiccant for color.
Serviceable desiccant is blue in
color.
Pink desiccant indicates
moisture
saturation
and
the
desiccant must be dehydrated or
Figure 30. Desiccant container, disassembly and
replaced.
reassembly.
(d) Replace the desiccant or container
as necessary.
(4) Reassembly. Refer to figure 30 and
reassemble the desiccant container.
(5) Installation. Install the desiccant container
(b above).
Section VII. EYEPIECES
49. General
microscope eyepiece is used to bring the circle images
a. Telescope and Microscope Eyepieces. The
into focus.
telescope eyepiece is used to focus the crosslines and
the objective point. Three telescope eyepieces of 24,
b. Eyepiece Prisms. The microscope eyepiece
30, and 40 power are provided for this purpose. The
prism and the telescope eyepiece prism perform the
functions of the conventional eyepieces
AGO 5078A 41
