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#11
06-21-2020, 05:52 PM
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Quick update. Since my last post, I noticed oil dripping from the supply line near the filter. I have drained the fluid, replaced the o-ring, and filled it back up with the synthetic blend Rotella. I also took the posted advice and marked the axles and wheel with paint to index the location of the splines relative to the wheels. I test drove the tractor and it is now pulling small grades, which is an improvement. I drove it around the yard for about a half hour pushing it as hard as I could up grades to allow it to repeat the problem (hydraulic squealing and shuddering while not being able to go up the grade). After doing this, I checked the paint marks and they were indexed exactly as they were when I began (see photo below of mark after test drive).
 Because replacing the o-ring on the supply line significantly improved the hydraulic power, I am thinking that there may be more seals in the hydraulic pump which are allowing pressure to blow past. Does anyone perform a rebuild service for these hydro pumps? I found a used one from a board sponsor here for $500, but hate to buy a used one which will develop the same issues in a few years and would rather put the money towards having mine rebuilt if such a service is available. 
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| 3225, hydrostatic transmission |
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