SECTION 6 - MAINTENANCE
6.1 GENERAL
The 1.2 meter Mobile VSAT is designed such that any wear should never degrade performance below specifica-
tions and essentially no maintenance will ever be required. However, since it is impossible to ascertain or test for all
possible environments, the following check up is recommended each year. If any problems are observed, refer to
the appropriate section.
6.2 ANNUAL INSPECTION
AZIMUTH
1. Hand crank in azimuth, the unit should hand crank easily.
2. Check for unusual noise in azimuth bearing and azimuth gearbox.
3. Run in azimuth and check for unusual noise in azimuth motor.
4. Check position of azimuth drive cables on capstan at 0 deg.
AZ. Refer to (Fig. 3.3) for proper position and spacing.
5. Check drive cables for damage.
6. Have someone run to both AZ limits and observe cable tracking.
7. Inspect cable terminations, and tighten springs if more than .010 gap
exists between spring sets. Tighten with an open-end 1/4” wrench and
using Visegrips pliers holding stud.
8. Inspect AZ stow switch.
9. Inspect and confirm AZ potentiometer is seated properly and not damaged.
10. Check AZ bearing screws, AZ gearbox bolts, AZ pot bracket, etc are tight.
ELEVATION
1. Check for unusual noise in elevation pivot bearings.
2. Run in elevation and check for unusual noise in elevation motor. (Run to
Limits) unit should travel easily. Inspect elevation limit switches.
POLARIZATION
1. Remove feed cover.
2. Run in polarization and check for unusual noise in polarization gearing
or motor.
3. Inspect polarization potentiometer.
4. Inspect wave-guide for any damage, dents, or cracks.
6.3 SPARE/REPLACEMENT PARTS
Since no maintenace is required, only electrical parts are recommended as spares. These parts will not fail from
activity, but may fail from environmental exposure.
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