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TM-5-6675-250-34 Survey Instrument Azimuth Gyro Lightweight( Leaser Siegler Inc. Models AG-8 and AG-8A) Manual
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Figure 4-1. Theodolite Removal and Installation.
TM 5-6675-250-24
REPAIR OF GYROSCOPIC REFERENCE UNIT
4-1. General
removing  theodolite.  Retain  the  GRU
housing in the tripod assembly or a holding
Repair and adjustment of the gyroscopic reference
fixture when removing the theodolite.
unit (GRU) consists of; replacing the theodolite,
(1) Remove three socket-head screws securing
t r i p o d assembly, gearbox assembly, tilt switch, cag-
t h e theodolite.
i n g link, time totalizing meter, uncage
indicator
(2)
Raise
the
theodolite
sufficiently
to
light, upper housing cover seals, and adjustment of
disconnect the electrical connector from 1A1J3
t h e caging mechanism and the upper band clamp
b e t w e e n the theodolite and GRU housing.
assembly.
(3) Complete removal of the theodolite by
4-2. Theodolite (fig. 4-1)
r a i s i n g clear of the GRU housing.
a. Removal.
CAUTION
Ensure that the GRU is securely held when
Change 1, 4 - 1

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