Installation Instructions
MACXLineTM Rigid Coaxial
Transmission Lines
 Bulletin 237086A

Read the Following Instructions
Thoroughly Before Assembly

Vertical Installation

The inner connector insulator and protective cover provide support for the inner conductor of each line section during the hoisting operation. Note: Do not attach hoisting sling to line section flanges.

Transmission Line Installation
Transmission line installation may begin at either end of the proposed vertical run. Installations originating at the top or antenna end of the vertical run will require proper positioning of the bottom miter elbow to allow for both expansion and contraction of the rigid line over the anticipated operational temperature range. Installations originating at the bottom or transmitter end of the vertical run will require careful alignment with the antenna. Additional miter elbows and field flanged sections will probably be required at the upper portion of the vertical run with additional rigid hangers at the bottom portion of the vertical run for increased support during assembly. Note: These additional hangers used during installation must be removed prior to placing system into operation.

Refer to Figure 1. Remove protective cover from end of line section and retain supplied "O" ring seal. Note: One "O" ring is supplied per line section and may be located under either protective end cover or in a separately supplied hardware kit.
Line and Flange Information
Type number MACX350-( ) MACX450-( ) MACX550-( ) MACX675-( )
Line Diameter, in 3-1/8 4-1/16 6-1/8 6-1/8
Flange Diameter, in
(mm)
 5-3/16
(132)		 6-3/16
(157)		 8-1/8
(206)		 8-1/8
(206)
Bolt Circle Diameter, in
(mm)
 4-3/8
(111)		 5-3/8
(136)		 7-3/8
(187)		 7-3/8
(187)
Number of Holes 6 8 12 12
Hardware Size, in 3/8 3/8 3/8 3/8


Hardware Torque
Specifications
Hardware
Size		 Torque
Value*
1/4" (6 mm) 7 ft-lbs (9 N-m)
5/16" (8 mm) 12 ft-lbs (16 N-m)
3/8" (10 mm) 21 ft-lbs (28 N-m)
1/2" (13 mm) 46 ft-lbs (62 N-m)
5/8" (16 mm) 76 ft-lbs (103 N-m)


Insert supplied liner connector into bellows end of inner conductor. Inner conductor may be pulled slightly from outer conductor while inserting inner connector assembly. Note: Do not apply twisting force on bellows while engaging inner connector assembly.

Apply thin coating of silicone grease to supplied "O" ring seal to temporarily secure "O" ring in position during assembly. Note: Ensure both seal and flange groove are free of dirt to ensure pressure tight seal.

Bellows end of line, as designated by red arrow label on outer conductor, must be installed toward antenna. Note: Bottom protective end cap may be temporarily secured to flange while hoisting transmission line assembly.

Remove and discard protective cover from end of previous line section. Align flange pins with corresponding flange alignment holes and join mating sections. Firmly push line and inner connector insulator seats properly in mating flanges.

Install and alternately snug mounting hardware at 180° intervals while maintaining a uniform gap between flanges. Perform final torquing sequence in a circular pattern. Do not overtighten. When properly installed, a small uniform gap should be noted around flange circumference. Note: The use of an anti-seize compound on all stainless hardware is recommended to prevent galling.


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