Andrew 9.3-Meter ESA manual Appendix ‘B’

APPENDIX ‘B’

Sector Change Process

The following is a generalized procedure of the actions required to change the 9.3M tripod mount from an existing azimuth range (sector) to a new one. (For example: from Azimuth range -60/+60 to -90/+30. Refer to APPENDIX ‘A’.)

A.Tools Required:

a.(2) Spud Wrenches

b.(2) 1 7/16" open end wrenches

c.(2) 1 5/8" open end wrenches

d.1 5/8" Socket for ¾" drive

e.1 7/16 Socket for ¾" drive

f.¾" Drive ratchet

g.(2) 9/16" wrenches

h.(2) come-alongs

i.(2) Tag lines

j.(2) Experienced riggers

k.Extension Ladder (Man lift Recommended)

l.9/64" Allen Wrench Set

m.(2) ½" wrenches

n.9/16" socket & ratchet

o.Safety Harnesses

p.Hammer

q.Set of Replacement Hardware

B.Procedure:

1.Disable Tracking System.

2.Remove vertical handrails from Maintenance Platform and Landing Platform. (to allow antenna to go to a high elevation angle for less wind loads).

3.Loosen or remove upper mechanical Elevation limit.

4.Increase Elevation Angle to maximum while watching for interference near Elevation Pivot Assembly.

5.Retract Azimuth Jackscrew within about 1 foot of full retraction.

6.Stabilize reflector using (2) come-alongs. Attach between panning assembly support legs 200107 and rear support legs 200109. Repeat on opposite side.

7.Loosen and Remove Jackscrew hardware between 200035 outrigger and 200022 pivot assembly.

8.Adjust jackscrew to full retraction using hand wheel.

9.Loosen/Remove Jackscrew Pivot Assembly hardware except for 1/2”x2.25” Lg. stud, as shown in Figure 19A on page 24 of manual.

10.Remove maintenance platform attachments if present. (i.e. - ladder)

11.Secure Azimuth Jackscrew with rope to landing platform for safety.

12.Swivel Jack and Azimuth Pivot Assembly 201021 slowly toward opposite side of panning assembly until mount holes in Azimuth Pivot Assembly line up. Use Spud wrench to assist further alignment.

13.Insert new A325 Hardware to secure Azimuth Pivot Assembly in new position.

14.Extend Jackscrew.

15.Swing Antenna using come-alongs and/or tag-lines to align Jackscrew pivot connection with panning frame holes. Use Spud wrench to assist further alignment.

16.Connect using new hardware.

Andrew Corporation	Telephone: 708-349-3300	Customer Service, 24 hours: U.S.A. • Canada • Mexico: 1-800-255-1479
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