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paint if applied heavily and rubbed vigorously. The reflector may be washed with plain water if necessary.
Do not use bleach, soap solutions, or kerosene as it is difficult to remove the residue. Allow the cleaned
surface to dry thoroughly before priming.
Prime the cleaned surface by applying zinc chromate primer. The primer can be applied with a brush,
roller, or pressurized spray. If necessary, thin the primer with acetone to the proper consistency. Feather
the primer onto the adjacent painted surfaces. Allow primer to thoroughly dry before applying the finish
paint coat.
Paint all RF surfaces, such as the inside of the main reflector and subreflector with highly-reflective white
paint. This type of paint disperses light rays, reducing the focusing effect of the sun’s radiation, thereby
reducing heat build-up caused by the focused sunrays on the feed system. Rear surfaces of the reflector
and subreflector may be painted with flat-white enamel paint. The paint can be applied with a brush, roller,
or pressurized spray. If necessary, thin the paint with the appropriate thinner to the proper consistency.
Thoroughly paint over the primed surfaces and blend with the existing painted surface.
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4.5.3 Galvanized Surfaces
Remove all loose paint and corrosion by scraping, wire brushing, or using steel wool. Edges of existing
paint can be blended with the metal surface using fine grit sandpaper. Wipe the surface to be painted with
a soft rag dampened with a small amount of acetone, or equal. Be certain to remove all loose paint,
corrosion, imbedded dirt, grease, and oil deposits or the paint will not adhere to the surface. Acetone will
dissolve paint if applied heavily and rubbed vigorously. Do not use bleach, soap solutions, or kerosene as it
is difficult to remove the residue. Allow the clean surface to dry thoroughly before painting.
Paint the cleaned surface with a zinc-rich paint. The paint can be applied with a brush, roller, or
pressurized spray. If necessary, thin the paint with the appropriate thinner to the proper consistency.
Thoroughly paint over the cleaned surface and blend with the existing painted surface.
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4.5.4 Lubrication
For long life and trouble-free operation be certain not to extend the lubrication schedule beyond the
frequency recommended in the Lubrication Chart. The frequency should be shortened if the antenna is
subjected to an adverse environment (e.g., high temperature, extended periods of rainfall, high humidity,
dust storms, etc). Any component or part should immediately be lubricated if during inspection or operation,
rough, jarring, or intermittent motion is noted, or if squeaky or other unusual noises are heard. Lubrication
is required on all metal-to-metal rolling or sliding parts. Us the lubricants recommended. Do not over
lubricate. Over lubrication can often be as damaging as under lubrication. Prior to the application of
lubricant to any parts, use a clean cloth and/or bristle brush
and remove any old lubricant to prevent an
excessive build-up. Be certain to remove
any protective caps and clean
each lubricated
fitting prior to
injecting fresh grease.
The Elevation and Azimuth jackscrew assemblies are equipped with a grease fitting
and
corresponding pipe plug on opposite sides of the jack housing. Remove the appropriate
pipe plug and
fill with
grease until lubricant seeps from the pipe plug opening. Replace and securely tighten pipe plug.
