Technical information
OM76_Rev J Page 25 of 28
For antenna surfaces, such as the front or back of the main reflector or subreflector, high-reflectivity white
paint should be used. This type of paint disperses light rays. The paint may be applied to the prepared area
using a brush, roller, or sprayer. If a sprayer is used, be sure to first thin the paint to a proper consistency
with paint thinner (10-15% thinner).
Thoroughly cover all previously primed areas with paint and blend the paint with any preexisting painted
surfaces.
5.2.4 Prepping & Painting Galvanized Surfaces
Remove all loose paint or rust using a scraper, wire brush, or sanding.
Wipe clean the surface to be painted with a soft cloth rag and lacquer thinner.
Allow the lacquer thinner to dry thoroughly before applying the finish coat of primer.
Apply a zinc-rich paint as the final finish, thoroughly covering any previously primed surfaces.
5.2.5 Priming & Painting Cleaned Jack Surfaces
Be sure to read ALL of the following instructions/guidelines BEFORE proceeding:
Surface Preparation – Use lacquer thinner and a soft cloth rag to remove all grease from the surface to be
coated.
Mixing – Use a power mixer to bring the paint to a uniform consistency before using.
Thinning – In the case of Jack Surfaces, thinning the paint is not normally required for most brush, roller,
or sprayer applications.
Using a Brush or Roller – Using a foam brush, apply paint to surface with full, single strokes. Avoid any
re-brushing. Using a medium nap roller apply paint to surface in long, single rolls. Avoid rerolling. The
recommended dry film thickness per coat is 2 mils (50 micron).
Allow Each Coat to Dry Thoroughly – Use the below chart (Table 5.1) to determine drying times. These
times are based on a 2 mil (50 micron) dry film thickness. Conditions such as higher film thickness,
insufficient ventilation, and/or cooler temperatures will likely require cure times to be extended. Allow the
primer to dry thoroughly before applying the topcoat. Application of the topcoat should be done based on
the above instructions.
Table 5.1: Cure Times
Temperature Touch Handle Topcoat
75° F (24° C) 4 hours (Primer) 12 hours 8 hours
75° F (24° C) 5 Hours (Topcoat) 24 hours
5.3 Removing Backlash via Jack Adjustment
The backlash removal feature is a factory setting and does not normally require any additional adjustment.
However, as time and extended use can lead to the development of wear, it may eventually become necessary
to perform a Jac/Jack Anti-Backlash Adjustment in order to reduce/remove backlash.
Use the following procedure for Jac/Jack Anti-Backlash Adjustment:
1. Loosen the Locknut (item b in Figure 5-1).
2. Loosen the Setscrews (item c in Figure 5-1).
3. In order to reduce backlash, rotate the Adjusting Cap (item a in Figure 5-1) in a clockwise direction until
able to feel resistance.
NOTE: Do NOT over-tighten the Adjusting Cap.
4. Using a felt-tip marker (or equivalent), place a reference mark between the thread on the Adjusting Cap
and the Housing.
5. Rotate the Adjusting Cap (item a) in a counterclockwise direction, in an amount equal to Dimension A
(labeled “A” in Figure 5-1) on the o.d. of the threads (match Jac/Jack model type, using the chart provided
in Figure 5-1).
6. Tighten the Setscrews.