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02-18-2026, 03:57 PM
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7254 Hydrostatic Transmission pump question suggestion
Hey all,
So I got the Transmission Hydrostatic Pump out, cleaned up, and reassembled. The charge pump looked great all things considered ( See below )  The pump shaft turned nicely as well, outside looks good, nothing out of the norm to report there.    I put it all back in the tractor, 2 new filters, inside cleaned and filled back to full with fresh oil. On start, everything sounds good, the pump is not making any funny noises. Shifting the pedal from forward to center to back you can hear the change in fluid moving. After about 10 minutes, the pump and oil lines are getting warm so it appears fluid is moving. That said, I am not getting any movement in the axel. Shifting from high low neutral is working as expected but I can hand spin the wheels no mater what gear. I read that sometime the lines need blead with some air pressure from the fill hole, gave that a try but no change in behavior. The pump is also not engaging / spinning the outboard shaft to spin the gears to power the Steering and Auxiliary pump ( took a peak under the top plate while it was running ). Below is a video of when I took a peak, I apologize in advance for the rattle noise, its the heat shield on the muffler. https://drive.google.com/file/d/1LXL...viNi5v5sA/view I am about to place an order to get a pressure gauge to see what the pressure is at the charge pump as per the service manual. Wanted to see if anyone had ideas to "Check" before I assume the pump is toast and start looking into rebuilding or replacement research. A side note, there is a electrical issue, the key currently only powers the oil light and fuel pump, I have to jump the coil to start it and wait till its outa gas before she shuts off. Don't believe there is anything electrical that would prevent the pump from working but wanted to throw that out there just in case there is. Got a switch on order which will start the electrical journey into this project. Thanks again all for your time! 
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