Section III. GENERAL MAINTENANCE
4 - 5 . Vertical Collimation Level
c.
Adjustment.
a. Removal.
(1) Loosen the three machine screws (2, fig. 4-
1) slightly.
(1) Remove the two machine screws (3, fig. 1-
(2) Level the theodolite (para 2-26).
t h e alidade. Remove the level cover.
( 3 ) Set the telescope in a horizontal position.
( 2 ) Remove the three machine screws (2, fig.
( 4 ) Set the vertical circle at 1,600 mils with
4-1) which secure the vertical collimation level
t h e vertical collimation slow motion screw.
assembly to the vertical collimation housing (3).
(5) Turn the adjusting screw (11) until the
Remove the collimation level assembly (1).
movable end of the level beam (13, fig. 4-2) is at the
b. Installation. Install the level assembly in
center of its travel in the level housing (5).
r e v e r s e order of removal.
7.
Screw,
machine
(spec)
(2
rqr)
1.
Vertical
collimation
level
assembly
8.
Screw,
holding
(spec)
(2
rqr)
2. Screw,
machine
(spec)
(3
rqr)
9.
Screw,
machine
(spec)
(2
rqr)
Vertical
collimation
housing
3.
10.
Screw,
machine
(spec)
(4
rqr)
4 . Screw,
machine
(spec)
(2
rqr)
11. Screw, adjusting (spec)
5 . Screw,
machine
(spec)
(2
rqr)
12. Screw, machine (spec)
Screw,
machine
(spec)
(4
rqr)
6.
Vertical
collimation
level,
vertical
collimation
lever
and
lens
assemblies,
removal
points.
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