ViaSat 8016, Installation And Operation Manual

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Chapter 4 - Maintenance
CAUTION
If it has been some time since electrical power was applied to
the actuator motors, go to the antenna, remove all electrical
power, manually release the motor brake, and rotate motor
shaft. Once it is determined that the brake will release and the
shaft will turn freely, then apply electrical power to the motors.
Failure to check brake and shaft may result in motor damage.
4.2.3 Bi-Monthly Maintenance
Perform the following procedures at least once every two months.
1. Remove resolver covers, inspect mechanical operation, and check for
condensation accumulation. If moisture exists, open all drain holes.
Apply a spray-type lubricant (WD-40 or equivalent) to all moving parts.
Secure covers.
2. Remove limit switch covers, inspect switch operation, and repair as
required. Secure covers.
3. Inspect polarization drive assembly, if applicable, and apply a spray-type
lubricant (WD-40 or equivalent) to chain and drive sprocket. Inspect feed
chain for correct tension and lubricate if necessary with spray-type
lubricant. Ensure that feed rollers are all functional. Inspect flexible
transmit waveguide, if applicable, for fatigue. Check limit switch
operation. Inspect feed window for damage and replace window as
required.
4. Inspect all cotter pins and other devices used as pin retainers. Replace if
damaged or corroded; tighten if loose.
5. Inspect mount, reflector, and feed for loose or missing fasteners and
replace as required.
4.2.4 Quarterly Maintenance
Perform the following procedures at least once every three months.
1. Inspect azimuth machine screw in accordance with the following
procedure:
a. Extend actuator to full length.
b. Remove boot clamp at end of screw and slide boot back to expose full
length of screw.
c. If the screw is coated with grease and the grease is in good condition,
no further action is required.
42S132E
4-2