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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
763 hydrostatic rebuild
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<blockquote data-quote="bttpe" data-source="post: 132200" data-attributes="member: 19457"><p>Here's the final report on this. Thanks to all who looked and added to the discussion. </p><p>We resealed the drive motor that had a leak where the shaft fits. That did not fix it. It still leaked too much fluid. </p><p>I followed that by disassembling again. Prepping all mating surfaces using 220 grit emery paper on a granite surface. Took a dremel tool with a small sanding drum to the edges of all the housings where they had some rust bleeding into the edge. Replaced the small (about 1" oring that came in the kit from Loader Parts Source) oring in the first plate (the one with the shuttle valve) with a slight larger Oring since it didn't appear to fill the groove. Closed it back up and torqued per the maual. Wallah....no leaks. Why do I think this worked? 1) the oring that I found a substitute for did not look large enough. I couldn't tell using dial calipers if it was going to compress in the groove 2) flattening using emery cloth on the granite table. (I verified that I could see sanding marks at all edges and believed at that point I was flat. This wasn't much sanding - maybe 50 strokes on each mating surface. 3) I double the dremel sanding changed anything this was all done on the outside edge and that is not where the leak was.</p></blockquote><p></p>
[QUOTE="bttpe, post: 132200, member: 19457"] Here's the final report on this. Thanks to all who looked and added to the discussion. We resealed the drive motor that had a leak where the shaft fits. That did not fix it. It still leaked too much fluid. I followed that by disassembling again. Prepping all mating surfaces using 220 grit emery paper on a granite surface. Took a dremel tool with a small sanding drum to the edges of all the housings where they had some rust bleeding into the edge. Replaced the small (about 1" oring that came in the kit from Loader Parts Source) oring in the first plate (the one with the shuttle valve) with a slight larger Oring since it didn't appear to fill the groove. Closed it back up and torqued per the maual. Wallah....no leaks. Why do I think this worked? 1) the oring that I found a substitute for did not look large enough. I couldn't tell using dial calipers if it was going to compress in the groove 2) flattening using emery cloth on the granite table. (I verified that I could see sanding marks at all edges and believed at that point I was flat. This wasn't much sanding - maybe 50 strokes on each mating surface. 3) I double the dremel sanding changed anything this was all done on the outside edge and that is not where the leak was. [/QUOTE]
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763 hydrostatic rebuild
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