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with the antenna for the proper lubricant. It is not necessary to change out the oil in the
gearboxes for the life of the antenna.
3.6 Bearing Lubrication
The following paragraphs describe the function, location, and lubrication of the remaining
moving mechanisms of the antenna system which require lubrication.
The bearings used on the pedestal assembly are the elevation axis bearing (2), the
azimuth axis bearing (2), and the elevation and azimuth drive jack rod end bushing (1).
Bearings should be lubricated at least every two months. Clean all dirt off the grease
fittings prior to lubricating bearings. Inject Almagard #3751 grease, using a conventional
pump-type grease gun.
3.7 Elevation Axis Bearings
The reflector is attached to the pedestal at the elevation axis through two self-aligning
spherical bushings, which are installed in the Pedestal Assembly.
The elevation axis grease fittings are located on the elevation lugs protruding from the
pedestal.
3.8 Azimuth Axis Bearings
The azimuth axis of the antenna is defined by the bearings at the upper and lower
pintles on the back side of the pedestal. The upper bearing is a self-aligning spherical
bushing. The lower pintle uses a radial bearing and a thrust bearing. Grease fittings are
provided on their respective housings.
3.9 Drive Assembly Bearings
A spherical plane bearing is used at the end of the elevation and azimuth jack screw
drive assemblies to provide pivoting action at this point.
The elevation drive assembly bearing grease fitting is located on the hub jack lug.
The azimuth jackscrew assembly bearing grease fitting is located at the azimuth
jackscrew rod end.
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