So you know what you are looking at, go to their site and look at the parts list and manual before you climb up on the roof. There is instructions on lubricating and also parts that can be replaced. Lubrication will normally prevent leaks, as well as the boot at the coax connection. Click on the file 2452013.pdf in the following link for the owners manual.
http://www.winegard.com/help/index.p...le:2452013.pdf