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Jackscrews/Motors
Gear
Motor/Housing Fill
Drain
Requirements
51
tube assembly and corresponding thrust pads. Securely replace access plugs in square
tube weldment. Be certain to remove any protective caps and clean off each lubrication
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 with grease until lubricant
seeps from the pipe plug opening. Replace and securely tighten pipe plug.
The following is a list of the lubricant characteristics:
• Mobil Temp SHC32 A non-soap hydrocarbon fluid type grease. Operating tempera-
ture range is -65 degrees to 350+ degrees Fahrenheit (-54
degrees to 177+ degrees Celsius).
• Mobil SHC624 A low temperature synthetic oil for worm gear reducers.
Operating temperature range is -40 degrees to 125+ degrees
Fahrenheit (-40 degrees to 52+ degrees Celsius).
•
Moly Grease A grease lubricant containing molybdenum disulfide. Operating
temperature range is -85 degrees to 300+ degrees Fahrenheit
(-29 degrees to 149+ degrees Celsius).
Periodically inspect lifting screws on jackscrew assemblies to ensure adequate lubrica-
tion. Loosen Jackscrew boot clamps to expose the lifting screw assembly. Fully extend
jackscrew assembly being careful not to exceed preset mechanical limits. Brush thin
coating of Mobil SHC32 grease on exposed lifting screw. Replace boot and attach corre-
sponding boot clamps. If lifting screw is rusty, remove existing lubricant with solvent and
wire brush rusted area. Rinse with solvent and apply fresh grease.
Peiordically inspect and remove dust or dirt deposits from the motor housings to avoid
hindering the heat exchange with the ambient air. Slight dirt accumulation on the air
vent screw through splash oil cannot be avoided; however, keep vent screw clean to
ensure proper pressure compensation.
Lube points 2, 3, 7 and 8, shown in the Lubrication Chart, require removal of the indicat-
ed drain plugs and collecting/measuring the amount of SHC624 drain oil using measur-
ing cup. The specified amount of oil must be added to the gear motor/housing (after
installing the drain plug) via the fill/vent plug opening using supplied funnel. Addition of
the oil requires use of an appropriate filling utensil. Use of a modified level stick will not
correctly gauge the appropriate amount of oil in the gear housings.
Lube Service Lube Quantity Andrew
Point Parts to be Lubricated Action Frequency Type Type /Points Number
Preventive Maintenance