MAINTENANCE
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42S183D
SERIES 8116/8118 16-/18-METER EARTH STATION ANTENNA
6-5
Perform the following procedures at least once every year.
Yearly Maintenance
1. Inspect the foundation pad for structural cracks and repair as
required.
2. Inspect feed and feed radome.
3. Check torque values on all fasteners as follows:
1 1/4-inch Fasteners
1100 ft-lbs (1491 Nm)
1-inch Fasteners
600 ft-lbs (813 Nm)
3/4-inch Fasteners
260 ft-lbs (353 Nm)
5/8-inch Fasteners
150 ft-lbs (203 Nm)
1/2-inch Fasteners
76 ft-lbs (103 Nm)
3/8-inch Fasteners
31 ft-lbs (42 Nm)
5/16-inch Fastener
24 ft-lbs (33 Nm)
1/4-inch Fasteners
9 ft-lbs (12 Nm)
Perform the following procedures after completing the installation
and every 12 months thereafter.
CORROSION
PROTECTION
NOTE
Pressurization of transmit waveguide runs and feed
components should be maintained to prevent moisture from
entering the system.
1. Evaluate the corrosion protection on the mount, actuators, and related
hardware. If the protective finish is damaged, clean with a wire
brush, remove all rust, and apply a coat of Rust-Oleum (or
equivalent) spray-on cold galvanizing compound.
2. Evaluate the corrosion protection on the reflector surface, spars, feed,
resolver brackets and related hardware. If the paint is scratched,
chipped, beginning to flake, or just wearing thin, lightly sand with
320 grit (or finer) sandpaper and apply a coat of Rust-Oleum (or
equivalent) primer and semi-gloss white paint.
