Specifications

15
4.0 Lubrication
4.1 For long life and trouble-free operation, be certain not to
extend the lubrication schedule beyond the frequency rec-
ommended in Table 2, Lubrication Chart. The frequency
should be shortened if the antenna is subjected to extensive
use or an adverse environment (e.g. high temperature,
extended periods of rainfall, high humidity, dust storms,
etc.). Any component or part should immediately be lubri-
cated if during inspection or operation, rough, jarring, or
intermittent motion is noted, or if squeaky or other unusual
noises are heard. Use the lubricants recommended in para-
graph 4.6. Do not over-lubricate. Over-lubrication often can
be as damaging as under-lubrication. Prior to the applica-
tion of lubricant to any parts, use a clean cloth and/or bris-
tle brush and remove any old lubricant to prevent an exces-
sive buildup. Be certain to remove any protective caps and
clean off each lubrication fitting prior to injecting fresh
grease.
A. Periodically inspect lifting screw on jackscrew assembly
to ensure adequate lubrication. Loosen jackscrew boot
clamps to expose the lifting screw assembly. Fully extend
jackscrew assembly being careful not to exceed the preset
mechanical limits. Brush a thin coating of Mobil SHC-32
grease on exposed lifting screw. Replace boot and attach
corresponding boot clamps. If lifting screw is rusty, remove
existing lubricant with solvent and wire brush the rusted
area. Rinse with solvent and apply fresh grease. The ele-
vation jackscrew assembly is equipped with two grease fit-
tings and a corresponding pipe plug on the jack housing.
Remove the appropriate pipe plug and fill unit with grease
until lubricant seeps from the pipe plug opening. Replace
and securely tighten the pipe plug.
B. Periodically inspect and remove dust or dirt deposits
from the motor housings to avoid hindering the heat
exchange with the ambient air.
4.3 Motor Gearbox/Housing Fill and Drain Requirements
A. A slight dirt accumulation on the air vent screw through
splash oil cannot be avoided, however, keep vent screw
clean to ensure proper pressure compensation. The initial
oil change of the new gear box should be performed at the
end of three months of operation. Under normal conditions,
the gear box oil should be changed after every six months
of operation after the initial oil change. Under severe envi-
ronmental conditions, the oil may have to be changed every
three months. Examine a sample of the oil to help deter-
mine the appropriate interval. If the antenna is to remain out
of operation for more than two months, it is recommended
that the gear box be completely filled with oil to prohibit rust
and corrosion in the housing. Be certain to drain the excess
oil prior to placing the antenna back into operation.
B. To change the oil, remove the drain plugs and level
plugs, and drain the oil using a 1-1/2 quart container.
Reinstall the drain plugs. Remove the filler plugs. Using an
appropriate funnel, fill the gear box with the indicated oil up
to the level plug (refer to Table 2). Reinstall the level and
tiller plugs.
4.4 Drive Chain Lubrication Requirements
A. Remove drive cover and apply open gear lubricant to
surface of drive and idler sprockets.
B. Remove two (2) sections of the side cover by removing
attaching hardware and apply indicated lubricant to full
length of chain with brush. Rotate positioner in azimuth for
total coverage. Replace side cover sections.
4.5 Cam Followers and Azimuth Ring Lubrication
A. Cam followers are filled with Mobilux EP-2 grease and
under normal conditions, will not require refilling. However,
periodic surface coverage with open gear lubricant is
required. Both the cam follower and azimuth ring surfaces
may be brush lubricated without removal of sidecover assem-
blies.