Extremely Important to follow the recommendations by manufacturer. I used to pop the wheels off and use the "bearing buddy" grease zirk to add grease several times each summer. We have had our Oliver Legacy since 2009, I believe. Last fall we were driving it home and stopped for a bite to eat. I walked around the unit and notice a hot metal smell and that the right wheel was leaning in. I jacked it up and found the wheel bearing destroyed. I was less than a mile from an RV dealer/repair shop so we let the axle and bearings cool down the drove slowly and dropped it at their lot. It was a Sunday so no one was there. I called the local police and alerted them about what I was doing and why. I then called the dealer the next morning and told them what had happened. They went ahead and repacked the bearings. Apparenetly, you should not use bearing buddies to add grease on a wheel with electric breaks. Instead, you should remove the wheel and hand pack them. To not follow manufacturer recommendations could have been disasterous.
We took her down to Indy yesterday and the connection to the brakes is not working. It could be somethng they did when they repacked the bearings or it could be an electrical connection. I am going to get that checked. Good luck and be safe!