Technical data

Preventive Maintenance

Jackscrews/Motors

Gear

Motor/Housing Fill Drain

Requirements

Remove indicated access plugs from square tube weldment and apply lubricant to pan-

ning frame 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 lubrica-

tion 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 it with grease until lubricant seeps

from 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

temperature 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 Lubricant temperature range is -85 degrees to

300+ degrees Fahrenheit (-29 degrees to 149+ degrees

Celsius).

Periodically inspect lifting screws on jackscrew assemblies to insure adequate lubrication.

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 cor-

responding boot clamps. If lifting screw is rusty, remove existing lubricant with solvent and

wire brush rusted area. Rinse with solvent and apply fresh grease.

Periodically inspect and remove dust and dirt deposits from the motor housings to avoid

hindering the thread 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 and 4, shown in Table 1, require removal of the indicated drain plugs and

collecting/measuring the amount of SHC624 drain oil using measuring cup. The speciﬁed

amount of oil must be added to the gear motor/hosing (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.