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2. Loop the gasket, from the hardware kit (#209608-2), over the
outer conductor of the antenna-end repair segment. Check the
installation of the O-rings and reinsert them into their
corresponding grooves as required. If necessary, draw a small
bead of adhesive (#10866-122) to hold the O-ring in its groove.
Then apply a thin, approximately 1/64 inch (0.4 mm) continuous
coating of Alumnashield® (#203233-4) from the
center of the flange holes to the outer edge of the transmitter
end repair segment flange. 3. Taking care that the O-rings are not displaced, mate the interface by moving the flanges of the two repair section segments simulataneously. Maintain flange alignment during the movement procedure and visually observe the initial alignment of the inner conductors. CAUTION: The connectors are positioned for the proper insertion depth and mating should occur smoothly -- DO NOT FORCE THE TWO FLANGES TOGETHER. 4. Continue to move the flanges toward alignment until the joint locks in place and the two repair sections are straight. 5. Install the bolts from the hardware kit (#209608-2), making sure that the heads of the bolts butt against the transmitter-end flange. Install the gasket around the bolts on the back of the antenna-end flange. 6. Position the split plate (#221705) over the gasket and install the remaining flange hardware, using a back-and-forth twisting action to install the threadseal washer on the bolt. 7. Use the torque wrench assembly (#220045) to tighten the bolts to a 38- to 40-ft-lb torque. After the bolts are torqued, coat the exposed threads with Alumnashield® (#203233-4). CAUTION: TIGHTEN THE BOLTS GRADUALLY with the ratchet wrench assembly (#221180). Use an alternating pattern to produce uniform contact and to avoid warping the flanges. If nut runners are being used, first hand-tighten four bolts about 90° apart. Next, run up the other nuts. Then tighten all bolts to the final torque, by hand, using the torque wrench assembly. 8. Install the repair cable sections in the hangers according to Section 3.5.2. 5.6 Disassembly and Removal 5.6.1 General The general procedures used for disassembly of the SCL950 cable are the reverse of the methods and step-by-step instructions given for installation of this cable. Read through and become familiar with Section 3, Installation, before starting to disassemble the cable. The installed cable is disassembled by removing the section closest to the antenna end and continuing, section by section, toward the transmitter end. 5.6.2 Standard Section Disassembly Low-level installation require the loosening and removal of U-bolts securing the cable section in the hangers. |
The cable section is then disassembled while being supported in
the corresponding cradles. High-level or transition section
installations require the installation of lifting assemblies
(#221755) at each support, using ropes and pulleys to secure
the cable. These provide temporary support for the cable section,
allowing the U-bolts to be removed. Disassembly then proceeds
as follows: 1. Remove the strain insulator from the ANT end of cable section. 2. Remove the flange bolts at the TX end of the cable section and move the outer conductor toward the antenna a minimum of 4 inches (102 mm) to expose the inner conductor joint. 3. Use the driver-ring torque wrench (#220047) and inner conductor tool (#220335) to separate the joint connection. Use the innner conductor tool to hold the inner conductor stationary while using the torque wrench to loosen the driver ring. 4. Pull the inner conductor toward the antenna end of the cable section until the edge of the conductor is aligned with the corresponding edge of the cable flange. For high-level installations, lower the section horizontally. 5. Remove the cable section from the supports at a low level or from the ropes at high level. 6. Continue toward the transmitter until the necessary cable sections are removed. |