600-1152A 9
3.3
Foundation Anchor Bolts (and other Galvanized Steel)
Deteriorated surface finish on protruding anchor bolts and other galvanized steel shall be
repaired as follows:
a. Clean thoroughly using a solvent for greasy areas; hot water and detergent for dirt
accumulations.
b. Wire brush to remove rust and oxides.
c. Apply a coat of a cold galvanizing type paint (either aerosol or liquid).
3.4
Lubrication Schedule
Table 2 identifies the items on the antenna which require lubrication. Figure 1 shows
typical locations and number of grease fittings. Table 3 identifies grease quantities
required for various size jacks. Refer to the installation assembly drawings for locations
requiring lubrication.
3.5
Jacks and Gearboxes
The gearing in the machine screw jacks must be lubricated with General Dynamics
SATCOM Technologies’ standard recommended grease which is Almagard #3751.
Refer to the Project Print Pack shipped with the antenna to confirm site specific
lubricants. For normal operation, jacks should be greased at least once a month. Under
severe use, (i.e. steptrack operation on one satellite or many changeovers between
satellites daily) jacks should be lubricated twice a month. There are three (3) grease
fitting locations on each Azimuth and Elevation machine screw jack. Two (2) are located
on the jackscrew housing near the input wormgear (driving) shaft. The third grease fitting
for the azimuth jack, as well as a removable plug (used to monitor the amount of
lubrication inserted into the housing), are located on the face of the of the jackscrew
cover tube where the cover tube fastens to the gearbox assembly housing. The thrid
grease fitting for the elevation jack is located on the face opposite the jackscrew cover
tube.
Prior to beginning the lubrication process, remove the plug mentioned above. Alternate
insertion of grease into the separate fittings. This will help to evenly distribute the grease
and make sure adequate lubrication has been provided. Continue lubrication until the
grease is forced out of the housing via the unplugged hole. Replace the plug.
Important:
DO NOT MIX GREASES. Every two months, remove the boot. The
exposed jack screw should be cleaned and coated with a thin
coating of the Almagard #3751 grease.
The grease should be painted on with a paint brush so that a film of at least .03 inches
remains on all exposed surfaces of the jack screw and the boot replaced. Annually the
boot should be removed and the jack screw extended to the limit before cleaning and
coating. In this case, the housing lubrication should be delayed until after the boot is
replaced and the jack screw retracted to the operating point in order to insure maximum
grease retention.
Improved boot life can be obtained by coating the boot with a silicone-based protectant,
such as Armor All
®
, every two months.
The gearmotor lubrication levels should be checked at least every two (2) months and
new lubricant should be added as necessary.
Refer to the Project Print Pack shipped
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