ViaSat Series 8345, Installation Manual

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Chapter 4 - Maintenance
Chapter 4
Maintenance
4.1 General
The Series 8345 4.5-Meter Prime Focus Motorized Antenna is designed for
use in many different environmental conditions with minimum maintenance
requirements. Several areas on the antenna require service at various
intervals to ensure the proper use and operation. Modification to the
suggested service intervals is expected pending customer operation and
environmental conditions. The elevation pivot points are designed with
grease fittings and require lubrication. The azimuth axis rotates on rollers
about the azimuth ring, which requires a light film of grease on the roller
surface. Grease fittings are supplied for roller lubrication. The azimuth and
elevation actuators contain a gearbox or reducer and a machine screw
mechanism which require inspection and application of lubricant as required.
Grease fittings are supplied to lubricate azimuth lead screw support bearings.
Boots are supplied on each actuator which require inspection. The prime
focus polarization drive mechanism requires no lubrication, but must be
inspected to ensure proper operation. Structural fasteners used on the
mount, actuators, reflector, and prime focus feed may require additional
corrosion protection.
4.2 Periodic Maintenance
The suggested service intervals apply to a typical antenna installation and
may vary due to environmental conditions.
4.2.1 Weekly Maintenance
Perform the following procedures at least once every week.
1.
Ensure dehydrator compressor desiccant is functional (per color chart). Check
pressure and maintain approximately 0.25 psi, open drain valve in pressure tank
to remove water accumulation.
2. Ensure motorized antennas are driven in azimuth and elevation on a weekly
basis. In areas of heavy snow and ice, mounts should be inspected before
movement for excessive accumulation of ice, or damage may result.
42S199F 4-1