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Andrew ES73 Step, Installation Procedures, Figure, 301741/301742 Tripod Joint Bracket 221721

Models: ES73

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Page 21

301741/301742

Step 9

Figure 21

Attach 301741 right tripod joint bracket and 301742 left tripod joint bracket to 221721 elevation axis assembly as shown in Figure 22.

•Use 7/8 x 2-1/4 in (57 mm) bolt, flatwasher under bolt and under nut, and nut

•Insert bolts from elevation axis assembly to tripod joint brackets

301741/301742

Tripod Joint Bracket

221721

Elevation Axis Assembly

Figure 22

21	Installation Procedures

Image 21

Andrew ES73 Step, Installation Procedures, Figure, 301741/301742 Tripod Joint Bracket 221721, Elevation Axis Assembly

Contents

Installation, Operation and Maintenance Type ES737.3-MeterESA 7.3-MeterEarth Station AntennaTable of Contents Table of ContentsHow to Use This Manual Getting Started Installation Procedures Operation Preventive7.3-MeterEarth Station Antenna IntroductionIntroduction Proprietary Data Information and Assistance Customer Service CenterNotice Technical Assistance 24-hourTechnical AssistanceHow to Use This Manual Overview ContentHow to Use This Manual Getting Started Overview WarningsGetting Started Tool Recommended ToolsSize QuantityReporting Equipment Loss or Damage Parts VerificationReporting Visible Loss or Damage Reporting Concealed Damage Inventory Equipment ReceivedGetting Started Returning Equipment Step Step Step Step StepInstallation Procedures Installation ProceduresOverview Foundation Preparation Use Felt Marker Before After A-325Tensioning Step Step Step Step Step StepTensioning Tensioning Installation ProceduresTripod Ground Mount Assembly Azimuth Beam Assembly Step Step StepInstallation Procedures Support Legs Assembly Step Step Installation Procedures•Use 7/8 x 2-1/4in 57 mm bolts and nuts Figure Installation Procedures Step StepInstallation Procedures Step Step•Use 7/8 x 2-1/4in 57 mm bolts and nuts Installation Procedures Panning Frame Assembly StepInstallation Procedures Step•Use 7/8 x 2-1/4in 57 mm hardware Figure FigureInstallation Procedures Step StepFigure Installation Procedures Step Step•Use 7/8 x 2-1/4in 57 mm hardware Installation Procedures Step Step•Use 7/8 x 2-1/4in 57 mm hardware Elevation Axis Assembly Installation ProceduresStep FigureInstallation Procedures Step Step•Use 7/8 x 2-1/4in 57 mm bolt, flatwasher and nut Installation Procedures Elevation Jackscrew Assembly Step StepInstallation Procedures Step StepFigure Azimuth Jackscrew Assembly Step Step Mount Assembly Step StepInstallation Procedures Step Step Installation ProceduresFigure 201327A 201313AInstallation Procedures Step StepFigure 32A Figure 32B Installation Procedures Step Step StepInstallation Procedures Step StepFigure 35A Reflector Subreflector Feed Assembly Feed/Waveguide Assembly Step StepInstallation Procedures Installation Procedures StepFigure Installation Procedures Step Step 5 StepStep Installation Procedures•Insert bolts from feed horn to mounting pipe FigureInstallation Procedures Step•Use 1/2 x 2 in 51 mm bolts, lockwashers and nuts Installation Procedures StepFigure Reflector Backstructure Assembly Step Installation ProceduresFigure Figure Installation Procedures Step Step StepFigure Installation Procedures FigureCenter portion of Andrew “flash” logo Step Installation Procedures•Use 1/2 x 1-1/2in 38 mm bolt, lockwasher and nut FigureInstallation Procedures StepFigure Figure Step Step Installation ProceduresFigure FigureInstallation Procedures Step Step Step Step Step StepInstallation Procedures Step StepFigure Figure Subreflector Strut Assembly Step Installation ProceduresFigure Figure Installation ProceduresInstallation Procedures StepFigure Figure Installation Procedures Step Step StepFigure Installation Procedures Reflector to Ground Mount Assembly Step StepFigure Figure Installation ProceduresInstallation Procedures Subreflector Assembly and Adjustment Step StepInstallation Procedures Step StepFigure Installation Procedures Cross-AxisGrounding Kit StepInstallation Procedures Step Step StepFigure Operation Overview Acquiring A SatelliteOperation The following steps provide the procedure for acquiring a satellite Step Step Step Step Step StepOperation Move the antenna in azimuth to obtain a null, then move ± in elevation to obtain a large peak signal. If not, move the antenna in the opposite azimuth direction through the peak and again move ± in elevation to obtain a large peak signal. If a larger peak is not found, you were on the main lobe Step Step StepOperation Step Figure 4-5:Optimum Polarization SettingOperation Figure 4-4:Maximizing Odd TranspondersOperation Subreflector AdjustmentPreventive Maintenance Overview General Cleaning Electrical PartsPreventive Maintenance Mechanical Parts Inspection Local Control/Motor Drive ControllerPreventive Maintenance Preventive Maintenance Antennaand minus direction from the local control/motor drive controller at least once every three months during antenna down time. Check the mechanical limit switches provided at the end points stop the antenna and feed movement, and limit travel to prevent struc- tural interference and damage. Check the mechanical limit switches for corrosion and water entry and the arm on each feed limit switch for free movement without binding. Be certain both feed rotation limit switch arms are not distorted and ride centrally on the actuating cam to open their corresponding limit switch Preventive MaintenanceDrive System Voltage and Current Checks Step Step Preventive MaintenanceStep Preventive Maintenance Turn the AZIMUTH EAST/WEST switch to either position and while the antenna is rotat- ing, carefully use a clamp on ammeter in accordance with the ammeter manufacturer’s instructions to take current readings off each of the three conductors phases connect- ed to the load side of the azimuth drive motor circuit breaker. Record the current draw in the equipment log and compare the readings to the reference values entered in the installation/acceptance check off. If the readings differ by more than five percent, refer to appropriate troubleshooting information and perform applicable corrective action. Then take voltage readings off each of the three conductors; the readings should agree with each other—withintwo percentStep Step Step Step Step Step Preservation of Component Parts Aluminum Parts Galvanized Surfaces LubricationPreventive Maintenance Jackscrews/Motors Gear Motor/Housing Fill Drain RequirementsPreventive Maintenance Preventive Maintenance Lubrication Chart6 7 8 5 9 10High-SpeedAntenna Lubrication Points Preventive MaintenancePreventive Maintenance Medium-SpeedAntenna Lubrication Points5 9 10 6 7 8