18. Slide the outer conductor until the flanges butt, taking care that the O-rings are not displaced. Install the remaining hardware, using a back-and-forth twisting action to install the threadseal washers.
19. 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 Alumashield® (#203233-4).
CAUTION: TIGHTEN 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 around 90° apart. Next, run up the other nuts. Then, tighten all bolts to the final torque, by hand, using the torque wrench assembly.
20. Remove the protective covering from the ANT end of the cable section and install a strain insulator (#207567) around the inner conductor, flat side outward. Rotate the strain insulator on the inner conductor until it seats in the flange.
21. Cover the ANT end of this newly installed cable section with one of the supplied plastic bags.
22. Install the cable in the hangers according to Section 3.5.2.
3.5.4 Cable Section Bending
Bends in the transmission line cable sections are specified in the installation layout. They occur at transitions between high and low levels, and as needed for the general routing requirements between transmitter and antenna. A 20-ft (6.1 m) radius is used for all bends. When bends are required, cable sections are bent prior to installation.
The layout indicates the start of the bend in a cable section by specifying a distance from a referenced cable support. (The length of the cable bend and the resulting angle between the original and final cable axis are also specified.) Therefore, by measurement from the reference support and from the end of the last cable section installed, it can be determined whether the next section requires bending. If it does, measure to locate the start and stop points for bending and mark these points on the outer conductor with tape. If the distance from the start bend point to the cable section end is shorter than the required bend length, then the remaining length is measured and marked on the next cable section.
First, mark the start and stop joints for bending the cable section. Then, after marking these points, the procedure for bending the cable is as follows:
1. Set the cable section on the bending fixture and secure it with the clamp plate. The clamp rods must be seated in adjacent corrugations, just prior to the tape marking the start of the bend.
CAUTION: Where bending is required in a plane at a specified angle to the horizontal or vertical, the flange holes of the bent section must be rotationally aligned with the flange holes of the previously installed section. Use a combination square having a protractor head with level vial (or simmilar tool) and rotate the cable section about its long axis as required prior to bending. Any diametrically opposite pair of flange holes may be used as a reference in setting the angle of rotation. It is necessary that the bed of the bending tool be level when setting the angle of rotation.