on the subject...when my actuator stopped working my brakes locked on, which caused a severe heat issue, and the little rubber seal on the rear two hubs melted off. I am assuming that this seal keeps the grease in the bearings? So if it is gone, it could be bad. I can post a pic if that will help. Also, the trailer shop guy deactivated my actuator so that I could pull the trailer around, but he doesn't seem too anxious to call me with the rebuild kit.