B&M blower question
 

I opened the back plate and it appears the rotors have warm groves into the back cover. The bearing are together but are ready to be changed. I also noticed one of the rotors has a very very slight movement back and forth. I don't believe this is the issue because with the back plate on it holds the rotor in place. Anyways any ideas on why this is worn? Any tricks to replacing the rear bearings? Thanks

This would be better in q&a. Hopefully a mod will move it. Sounds like its time for a rebuild. How many hours since last rebuild?

send them to the blower shop..they are beyond bearings at this point..with the groves in the case's thet might be able to ne machined or they could be junk..either way i would hate to see one come apart and ruin the engine..

My bad wrong forum
Thanks