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Test for a full 360 degrees of rotation and make any adjustments that are necessary to the controller box.
Mast Clamp
The Mast Clamps have multiple holes for mounting to the rotator top plate. Place the Mast Clamp that will be
used on the rotator top plate. Move it around to locate the four holes that align with the top plate and the mast
clamp. Mark the four holes with a Sharpie style marker on the mast clamp that are used. This will make it a bit
easier once you are on the tower and installing the mast clamp to the rotator.
The chosen mast clamp should already have the clamping hardware loosely installed per the mast clamp
instructions. Ensure Jet-Lube SS-30 is used.
DXE-RTMC-2 Two Inch Mast Clamp used in this installation example.
Installing the Rotator and Mast in the Tower
There are two ways to accomplish the installation and alignment of the mast to the rotator in the tower.
- Using a Gin Pole raise the mast to the point that it can pass though the Thrust Bearing. Keep in mind, there is
not a lot of play between the Thrust Bearing and Mast so alignment between the Thrust Bearing and Mast is
critical.
Allow the mast to be lowered through the Thrust Bearing and stop about 14-1/4” inches above the Rotator
Shelf. This allows room for the rotator and the 2 inch mast clamp.
- The alternative is to use a 2 inch OD aluminum tube, long enough to go from the just above the Thrust
Bearing to the Rotator Shelf in place of the steel mast. When everything (rotator shelf, rotator alignment, mast
clamp alignment) is properly adjusted, remove the temporary aluminum mast and install the steel mast. Doing
it this way avoids any concerns about the heavy steel mast moving things around when mast-rotator shelf-
tower alignment adjustments are made.
NOTE - For this example: A temporary 2 inch OD aluminum tube will be used for alignments.
Once alignments are completed, the aluminum tube will be removed and the 2” OD steel mast will be
installed.
