Specifications

13
A. Trailer
1. Check tire pressure, it should be maintained at 85 psi.
2. Lubricate the four corner jacks and the trailer jack.
3. Check ball on the towing vehicle to ensure it has not been
damaged or worn. The brake system will not function prop-
erly unless the ball size is 2-5/16 inch diameter.
4. Check the fluid level in the brake system master cylinder
and refill it as required to 1/2 inch below the top of the filler
cap. Use only DOT 3 automotive brake fluid.
5. Check brake linings for wear especially if the trailer is
being towed often. Replace shoes if necessary.
6. Lubricate all links and pivots on the surge brake system
to ensure ease of operation, if required.
7. Adjust brakes as per owner’s maintenance manual.
8. Inspect all wiring and lights for wear or damage which
may have occurred during towing.
9. Visually inspect for loose or missing hardware. Replace
and/or retorque as required.
B. Antenna/Positioner. Inspection of the antenna con-
forms generally to standard visual inspection procedures
performed on electromechanical equipment. In addition to
these standard procedures, perform the following checks
and visual inspections for the specific conditions noted:
1. Inspect all wiring, flexible waveguide, rigid waveguide
and cables for discoloration and burned insulation, moisture
entry, corrosion, dirt, breaks,security of connection, physical
damage and other signs of deterioration. Examine connec-
tions for dirt, corrosion and mechanical defects. Check for
loose or broken lacing and cut, abraded, frayed, brittle and
cracked insulation.
2. Examine connectors for corrosion, broken inserts and
stripped threads. Check connector shells for distortion and
dents, and contact pins for bends, misalignment or other
deformities. Check connector inserts for cracks, and carbon
tracking, burns or charring indicating arc-over.
3. Check all electrical components for dirt, cracks, chips,
breaks, discoloration and other signs of deterioration and
damage. A discolored, blistered or burnt condition is evi-
dence of overload.
4. Inspect the drive chain on the azimuth turn table as well
as cam followers. These parts do require lubrication but a
check should be done to ensure they are functioning prop-
erly.
5. Operate the azimuth and elevation drives as well as the
feed rotation in both the plus and minus direction at least
once every three weeks during antenna down time. Ensure
that the antenna is under observation during operation to
prevent injury or damage. Check that the limft swftches pro-
vided at the end points stop antenna and feed movement
and limit travel to prevent structural interference and dam-
age. Periodically check all limit switch mounting hardware
to ensure that connections are tight. Check motor and limit
switch junction boxes for possible water entry. Check the
actuating arm on each feed limft switch for free movement
without binding.
6. Inspect the elevation jackscrew boot for security of
attachment at both ends, for abrasion, tears, cuts, brittle-
ness and other damage that may expose the jackscrew to
the environment (water, dust, etc.). Minor repairs can be
made with RTV.
7. After system operation, remove feed system and visually
inspect the feed window for dirt and the feed and feed win-
dow for distortion, foreign object damage and environmen-
tal deterioration due to ice and snow, dust, rain, hail and
highwinds, etc., which may cause electrical component
and/or structural deformation.
8. Check the cable attachment to the resolvers and the
cable insulation for cuts, cracking, abrasion and other dete-
rioration. Check the resolvers for a secure mechanical
attachment.
9. Visually inspect all mechanical parts for freedom of oper-
ation with no misalignment, binding or interference. Check
all cabling for sufficient slack to prevent cable strain as well
as adequate restraint to prevent abrasion or chaffing during
antenna and feed movement.
10. Check security of antenna mounting and interconnect-
ing assembly hardware. Replace rather than tighten any
loose A-325 structural hardware. The hardware distorts at
initial installation and once loosened, will not maintain the
required high-strength friction connection. All other assem-
bly and installation hardware should be tightened to its orig-
inal torqued condition. Use a thread-locking compound
when installing new hardware. Do not use a wrench with a
lever arm longer than two feet.
11. Examine painted aluminum and galvanized surfaces
and touch-up where required in accordance with the proce-
dures outlined in paragraph 3.0, Preservation of
Component Parts.
CAUTION: Do not paint exposed surface of 1/4-turn fas-
tener spacers.