Welcome to our forum.
I have cracked the handle a couple of times on my Reward when turning the handle with the pumps running. The last time I tried to repair it with super glue which worked for a few weeks but then broke again. My dealer sent me a new handle and diverting valve 2 weeks ago to replace the whole thing...cost only $39 as its out of warranty. I had foot surgery and am in a non-weight bearing cast for a couple more weeks so I guess I won't be able to see how the new improved valve works. Supposedly its teflon so it turns easier
My pumps are I think 4.6hp? (7bhp) and there is one pump for each diverter. On high the effort to move them might put more torque on the handles than what they are designed for. I will definitely baby them wiht one more month to go on the warranty.
Bill, are you sure your pumps are 4.6/7bhp? Sounds very high to me. If so, your electrical panel must spin like a top....