Travel Trailer Bearrings Travel Trailer Bearrings by Charles (Arizona) Question: I have repacked trailer wheel bearings many times. Just take off the cap, remove cotter pin, back off the castellated nut, remove bearing clean, dry, and repack with new grease. The problem is: No cotter pin, no keyway, no tabbed washer like on a outboard engine prop. The nut turns slightly in each direction but is stopped by something I can’t see. How do I remove it? I was thinking off putting the wrench on it and force it of but I don’t want to break anything and get in a worse mess. Answer: We really don’t have an answer to this, so we put your question out there in case others have ideas and will comment. Click here to post comments Return to RV FAQ.