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

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056341 Rev. AA NAVIGAT X Mk 2
Page 8-18 8: Gyroshpere Installation and Service
8.4.3 Preparing the gyrosphere for re-installation
Parts and tools required
– the installation and replacement parts kit, stock no. 074696, which was
used during installation of the gyrosphere
– fresh mercury and insulating fluid in protective capsule, stock no. 36026
– 1 l of fresh supporting fluid, from stock no. 49050 (1 l) or 35427 (10 l)
– a lint-free cloth for cleaning purposes
– soapy water or a washing solution containing a mild detergent
Procedure
1) Carefully wash the gyrosphere with soapy water or a washing solution
containing a mild detergent.
Caution
Used mercury and insulating fluid may not be reused.
When re-installing a gyrosphere, always use fresh mercury and insulating fluid.
Return the capsule with used mercury and insulating fluid to Sperry Marine for
recycling.
2) Take the stainless steel wool pad from
the installation and replacement parts kit
and thoroughly clean the bottom and
equator contacts.
3) Thorougly dry off the gyrosphere with a
lint-free cloth. Dip with the cloth down
into the recess to make sure that the bot-
tom of the recess is absolutely clean and
dry.
4) Place the gyrosphere onto the plastic
bowl from the installation parts kit.
5) Proceed with the installation of the gyro-
sphere into the gyrosphere container, as
described under 8.3.1, from step 10 on-
wards.