NORTHROP GRUMMAN Sperry Marine NAVIGAT X MK 2, Assembly Instructions Manual

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056341 Rev. AA NAVIGAT X Mk 2
Page 8-14 8: Gyroshpere Installation and Service
8.4.2 Removing the gyrosphere from the gyrosphere container
Parts and tools required
– the installation and replacement parts kit, stock no. 074696, which was
used during installation of the gyrosphere
– a 4 mm Allen key
– a lint-free cloth for cleaning purposes
– soapy water or a washing solution containing a mild detergent
Procedure
1) Place the container on the work surface.
2) Take the plastic bowl from the installation and replacement parts kit and
place it under the drain plug of the gyrosphere container.
Caution
After power-down, wait at least 45 minutes for the gyroscopes to stop rotating
before opening the gyrosphere container.
Caution
Do not use acetone or similar solvents.
3) Remove the plug from the ventilation
hole in the top of the container.
4) Unplug the drain plug and let the sup-
porting fluid run into the bowl.
5) Dispose of the used supporting fluid.
Note
The supporting fluid is not poisonous and is not harmful to the environment.
Used fluid may simply be poured overboard or down a drain.
6) Disconnect the power cable from the
centering pin.
7) Unscrew the centering pin and remove it
from the gyrosphere container.
8) Wash and dry the centering pin. Put the
protective cap on the tip of the pin.
9) Plug the drain and ventilation plugs back
into the container.