(7) Inspect the illumination mirror assembly
( 3 ) Inspect the compass (7) for damage such
(6, fig. 1-2) for improper positioning on the in-
as a broken cover glass, loose or missing hardware,
strument. The mirror assembly should rotate easily
and broken or missing eyepiece. See that the circle
on its mount, but must be tight enough to remain in
swings freely and easily on the needle screw
a n y desired position.
throughout its travel. Inspect the circle caging knob
(8) Inspect the circular level (8, fig. 1-1),
for improper functioning.
plate level (6, fig. 2-3), and collimation level mirror
(4) Inspect the two screwdrivers (6 and 8)
assemblies (1, fig. 1-2) for cracks, breakage, or
and the two adjusting pins (4) for uncleanliness and
looseness.
bends or cracks.
(9) Inspect the telescope focusing ring (16,
f.
Battery
Box
and
Accessories.
(1) Inspect the battery box (3, fig. 2-10) for
travel. There must not be any perceptible end play.
d e n t s , cracks, missing or broken clamps, and other
(10) Inspect the reticle mirror knob (4, fig. 1-
d a m a g e . See that the lid closes easily and can be
clamped securely to the box. See that all electrical
travel. When the line on the top of the mirror knob
contact points are securely fastened in place and are
is parallel to the telescope axis, the mirror does not
not broken or corroded. Run the rheostat knob
obstruct
from
the
reticle.
Turning
the
t h r o u g h its travel, making sure the movement is
knob counterclockwise from the parallel position
smooth and without binding. Inspect the dummy
p e r m i t s light to fall on the reticle.
batteries (2) for loose or dirty contacts. See that the
(11) Mount the compass (7, fig. 2-7) on the
s p a r e lamps (4) are secure in the mounting holes
c o m p a s s holder (2, fig. 1-3). Inspect for improper
and are in good condition. Inspect the carrying
seating and fit.
strap (10) for rips or tears.
(2) Inspect the hand lamp assembly (6) and
for any damage such as a broken or missing tripod
b a t t e r y cable assembly (5) for defective wiring or
head cover (7), damaged legs (2), and cut or
c o n n e c t o r plugs. See that the hand lamp does not
broken leather belt (3).
have a cracked or broken casing, defective lamp, or
c. Tripod Accessory Case and Accessories.
damaged
switch.
(1) Inspect the tripod accessory case (1, fig. 2-
( 3 ) Inspect the plug-in lamp holder assembly
( 8 ) for defective wiring, lamp, or connector plug.
l e a t h e r seams, and missing or loose buckle.
3-3. Servicing New Equipment
( 2 ) See if the tripod wrench (3, fig. 2-5) fits
a. Perform the preventive maintenance services
t h e tripod hardware.
described in paragraph 3-11.
(3) Inspect the plumb bob assembly (2) for
b. Install suitable batteries in the battery box,
broken or missing cords.
after first making sure that they are fully charged
a n d that the contact points are clean.
for rips, tears, and damaged or missing straps and
c. Inspect the condition of all external lenses and
buckles.
p r i s m s and clean if necessary.
e. Accessory Case and Accessories.
d. B e s u r e a l l a c c e s s o r i e s i s s u e d w i t h t h e i n -
( 1 ) Inspect the accessory case (1, fig. 2-7) for
strument are present and in good condition. Set the
rips, tears, or a defective zipper. Be sure all inside
instrument on its tripod and bring it to a level
pockets are in good condition. Inspect the
p o s i t i o n (para 2-25). Test all of the controls to be
theodolite cover (2) and chamois skin (3) for rips or
s u r e they are in satisfactory operating condition
tears.
Used
Equipment
(2) Inspect the diagonal eyepieces (10 and
11), sunglasses (12), and telescope lens (13) for
Perform
the
inspection
procedures
outlined
in
improper mounting on the instrument, broken or
Inspect
all
clamp
and
adjusting
defective glass, and uncleanliness. If the glasses are
screws carefully for evidence of damage, binding, or
dirty or fingermarked, clean with a camel hair
c o r r o s i o n . Clean all external lenses and prisms.
brush (5) and chamois skin (3).
Section
II.
REPAIR
PARTS,
SPECIAL
TOOLS
AND
EQUIPMENT
3-6. Special Tools and Equipment
3-5. Tools and Equipment
The special tools required for organizational
Items
troop
installed or authorized for the
m a i n t e n a n c e on the theodolite are listed in TM 5-
t h e o d o l i t e are listed in Appendix B of this manual
6 6 7 5 - 2 0 0 - 2 5 P and the following table 3-1, Special
and TM 5-6675-200-25P.
Tools.
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