I understand there is a problem but is it the crank and shaft section, the masts to the rotating gear housing) carriage, where the shaft goes through the(gear housing) carriage. Do you see where it is going?
I'd remove the mast without the gear and test raising and lowering, then the mast with the gear. It does require getting on the roof and pulling the clevis pins and trying the operation. Disconnecting the masts one at a time lets you isolate the part(s) that are binding.
With a helper it should only take ten minutes at most.
If the mounting plates need to have a beveled gasket, they are available from Winegard.
Good luck and let us know what the solution is and how you found it.
The roof wedges are RW-2000, IW-5012. The carriage is really called a Gear Housing and the part number is RP-2049.
The E-clips om my Bounder's antennas became severely corroded and so I replaced the clevis pins and e-clips with 1/4-28 capscrews and nylok nuts. I wanted to stop some of what I thought was excessive clearances that allowed the antenna to wobble around in even a slight breeze. It had no effect on the torque required to raise or lower the antenna.
I used 2.5" capscrews for the GH and 2" for the antenna itself. That way the holes in the masts were rig==ding on a smooth surface and not on the threads. A little overkill maybe but that's okay.
"I travel not to go anywhere, but to go. I travel for travel's sake. The great affair is to go". R. L. Stevenson
David Bishop
2002 Winnebago Adventurer 32V
2009 GMC Canyon
Roadmaster 5000
BrakeBuddy Classic II