I have a 2006 B7800 with a RC72 (72") belly deck. Cutting grass this weekend the belt tensioner bracket broke off right at the mounting of the assy on the deck. I was baffled how this could happen since it is 3/8" solid steel. I removed it from the deck to inspect closer and noticed the grease fitting hole was not all the way through the housing and into the bushing. My question is this. Does the housing pivot around that internal bushing or does it pivot on the mounting bolt? I was able to look at the expanded parts view at Kubota's web site and notice a top and bottom bushing and the longer bushing the mounting bolt goes through. Signed, Confused in Virginia.