Table
3-3.
Troubleshooting--Organizational--Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
CIRCULAR
LEVEL
BUBBLE
DOES
NOT
STAY
IN
CENTER.
Step
1.
Check
for
loose
level
adjusting
screws.
Tighten
screws
3.
LEVEL
BUBBLES
NOT
STAY
IN
CENTER.
Step 1. Check if collimation slow motion screw is loose.
Adjust
the
screw
4.
PLATE
LEVEL
BUBBLE
DOES
NOT
STAY
IN
CENTER.
Step 1. Check to see if plate level assembly is out of adjustment
Adjust
the
level
assembly
ELECTRICAL
SYSTEM
1.
LIGHTS
ON
VERTICAL
AND
HORIZONTAL
CIRCLES
UNEQUAL
OR
ABSENT.
Step 1. Check to see if illumination mirror is out of adjustment.
Adjust
mirror
Step
2.
Check
malfunctioning
plug-in
lamp.
Inspect
lamp
for
proper
operation
2.
LIGHTING
SYSTEM
FAULTY
OR
FAILS
TO
FUNCTION.
Step
1.
Check
for
burned
out
lamp.
Replace
lamp
(para
2-30).
Step
2.
Inspect
if
batteries
are
defective.
Replace
batteries
HORIZONTAL
CIRCLE
1.
HORIZONTAL
CIRCLE
DIFFICULT
TO
MOVE.
Step
1.
Check
if
horizontal
circle
clamp
is
locked.
Release
clamp.
TRIBRACH
1.
FOOT
SCREWS
TOO
TIGHT
OR
TOO
LOOSE.
Step
1.
Check
for
improperly
adjusted
foot
screws.
Adjust
the
screws
TELESCOPE
ASSEMBLY
1.
TELESCOPE
TURNS
TOO
HARD
OR
TOO
EASILY.
Step 1. Check if the vertical clamp screw is improperly set.
Reset
the
clamp
screw.
Section
VI.
CARRYING
CASES
o u t w a r d , releasing
the levers from the base
3-14. Hood Assembly
assembly. Lift the metal hood assembly (2) from
the base assembly (4).
forms the upper part of the carrying case. The base
(2) D i s a s s e m b l y .
assembly (4) forms the lower part. The carrying
(a) Remove the lever pin (14, fig. 3-15),
c a s e provides a convenient means of carrying the
holding the lever spring (15) to the metal hood
theodolite in the field and serves as a dust-proof and
(17). Remove the pin holding the lever spring to the
moisture proof container for the instrument when it
lever (16).
is in storage. The metal hood assembly is sealed to
(b) Remove the three rivets (18) and three
t h e base assembly by the pressure exerted by the
w a s h e r s (19) and separate the lever (16) from the
two clamping levers (3).
belt (1). Slide the belt from the belt brackets on the
b. Metal Hood Assembly.
metal
hood.
( 1 ) R e m o v a l . Grasp the belt (1, fig. 3-5) just
above the two clamping levers (3, fig. 2-6
and pull
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