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So I ended up installing a Beckett conversion on a customer's coach today. All went well. I will need to program the controller with the contractor tool though, as I ended up with the version that has the purge cycle set at zero from the factory. I will post a photo of how I set up the controller. It worked out fairly well. This was in a Wanderlodge, so the aqua hot was in the middle of the coach, lots of crawling around and twisting up like a pretzel to get everything installed. Replaced all the wiring that goes into the burner and to the temp limit switches with high temp wiring. Overall it was not a bad conversion. 

So I have a question, I have heard that if you are pulling the blower head out that there are some items that are worth replacing while you have it out. What are the items that are recommended to be replaced while you have it apart? Seem to recall bearings, and maybe a gear drive or something? The fuel pump gear?