Specifications

Chapter 4 - Maintenance
42S315F 4-3
c. If the screw is coated with grease and the grease is in good
condition, no further action is required.
d. If the screw is not adequately coated, or if the grease is dry,
hard, or contaminated, the lubricant must be renewed. Do not
add new grease to old grease on the screw. Clean the screw of
old grease using a solvent. Dry the screw with clean cloths.
Apply a thin uniform film coating of one of the following low-
temperature, clay-based greases.
CAUTION
If one of the following low-temperature greases is
not used on the actuator machine screw, damage
to the screw or motor could occur.
• Shell Aeroshell #7
• Mobil Grease #28
• Mobil SHC 634, in reducer
2. Apply grease to the azimuth and elevation jack housing and gearbox,
as required.
CAUTION
When lubricating grease fittings, care must be taken to
prevent excessive grease from damaging gearbox seals.
3. Apply low temperature grease to the following moving points (Refer
to Figure 4-1):
a. Azimuth actuator pivot pin
b. Azimuth actuator clevis pin
c. Elevation actuator pivot pins.
4. Apply white Rust-Oleum enamel to all mount hardware.
5. Apply spray type rust inhibitor to cavity above spherical bearing for
additional bearing protection.
6. Inspect feed window for damage, replace window as required (see
Radome Window Replacement Procedure toward the end of this
section). If window has moisture, dirt, or other foreign materials
present, clean as follows: