b. Cleaning and Inspection. Clean all meta
p a r t s with an approved cleaning solvent. Inspect
the window and screen for cracks and breaks.
R e p l a c e defective parts.
c. Reassembly and Installation.
(1) R e a s s e m b l y . Position the screen (2, fig. 3-
(3) in the hole in the center of the screen (2). Install
t h e inner container (4) in the upper container
(2) I n s t a l l a t i o n . I n s t a l l t h e d e s i c c a n t c o n -
tainer (5, fig. 2-3) in the base assembly.
( 3 ) Install the instrument and metal hood in
the base assembly (para 2-6).
3-16. Canvas Field Pack
T h e canvas field pack (fig. 3-4) should be cleaned
as required with soap, water, and a stiff brush.
Inspect the pack for tears, missing buckles, or
straps. Replace an unserviceable pack.
ME 6675-200-14/3-6
4.
Inner
container
1.
Upper
container
5.
Desiccant
2.
Screen
6.
Lower
container
3.
Window
Desiccant
container,
exploded
view.
Section
VII.
EYEPIECES
similar manner.
3-17. General
(3) Remove the setscrew (12, fig. 1-1) that
used on the theodolite are the
The
eyepieces
secures the optical plumb eyepiece (5) in the
telescope and microscope eyepieces, the diagonal
a l i d a d e . Remove the eyepiece (5) from the alidade
eyepieces, t h e o p t i c a l p l u m b e y e p i e c e , a n d t h e
b y turning in a counterclockwise direction.
s u n g l a s s e s . The diagonal eyepieces screw directly
b. Cleaning and Inspection.
i n t o the telescope and microscope eyepieces, and
( 1 ) Clean the eyepiece lenses with a lint-free
the sunglasses are a push fit on both the telescope
c l o t h moistened with acetone or grain alchol. Dry
e y e p i e c e and the telescope diagonal eyepiece. The
a n d polish with lens tissue.
diagonal eyepieces a n d p e r m i t s i g h t i n g u p t o
25 from the zenith.
(2) Inspect the lenses for scratches, chips, and
c r a c k s , and etching. Inspect all threaded surfaces
Telescope, Microscope
and
Optical
for worn or damaged threads.
Plumb Eyepieces
(3) Report all defects to field maintenance.
a. Removal.
c . Installation.
(1)
Remove
the
telescope
eyepiece
(1,
(1) lnstalI the microscope eyepiece (3, fig. 1-
by turning the eyepiece in a counterclockwise
direction.
i n a clockwise direction.
(2) Remove the microscope eyepiece (3) in a
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