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Message: <blockquote data-quote="blan" data-source="post: 11045" data-attributes="member: 1338"><p>I have a 1999 Bobcat 773G with about 2400 hours on it. It runs very well but there are a couple of issues that I would like to figure out. The machine clunks in the driveline somewhere almost like a chain is binding. It feels almost as if a chain is trying to jump off of a sprocket?? Most of my work with it had been in sandy areas. It only clunks when in motion and it feels like you just bottomed out on a log. This clunking has me more concerned than my next problem, but I'd like to mention both. The second issue I have been having is that the bucket lift and tilt slowly lowers by itself after raising or tilting. I have only put about 25 hours on the machine since I purchased it second hand and it was not drooping like this when I purchased it. I know that all of the fluids were changed at the time I purchased it. I was told by another Bobcat owner that it was possibly my hydraulic pump getting weak. Would this problem come on that quickly? I don't think the cylinders need rebuilding because there are no visible hydraulic leaks and the lift/tilt both drop off at about the same rate. If this sounds like a hydraulic pump, can a mechanically inclined user rebuild it and how costly is it to rebuild yourself?</p></blockquote><p></p>