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Read articles →This is a full hands-on DIY walkthrough of changing hydrostatic transmission fluid and filter on a Kubota BX23S, including pulling the wheel to inspect and clean the strainer screen for gasket debris, replacing the filter (part number shown), and refilling with the exact 11.3 liters measured out. It covers real torque notes, an unexpected stud issue, and fluid specs. Best for owners doing this service themselves.
Posted by the Maintenance with Mike channel, an owner doing their own DIY maintenance rather than a dealer or professional shop.
Remove the rear left wheel, undo the 12mm bolt and keeper holding the strainer tube, pull the strainer out, then spray it clean with brake cleaner before reinstalling.
The video measures out the exact amount called for, which is 11.3 liters, using 5 liter jugs of fluid.
The filter used is part number HHK20-36990, labeled HST filter on the unit.
The front axle uses Super UDT, the same fluid as the hydrostatic transmission, or an ISO VG 90 equivalent.
