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Read articles →This is a detailed hands-on walkthrough of a single maintenance task: draining and refilling HST transmission/hydraulic fluid on a Kubota BX23S (and related BX1880/BX2380/BX2680 models), including changing the transmission filter and cleaning the strainer. It covers socket sizes, fluid capacity (11.9 quarts), fluid type (Kubota Super UDT2), refill procedure, and troubleshooting a dipstick reading no oil after filter replacement. Best for owners doing this specific service themselves.
Appears to be an owner-operator DIY channel walking through their own tractor maintenance step by step, part of a multi-part BX maintenance series.
You need a 27 mm socket to loosen the drain plug, and the fluid capacity is 11.9 quarts.
Use Kubota Super UDT2 universal transhydraulic fluid. Cheaper hydraulic fluid lacks the additives the machine needs to perform correctly.
The new oil filter absorbs a considerable amount of fluid, so after running the engine the dipstick can read empty until you top it off.
Remove the 12 mm bracket bolt, pull the strainer with channel lock pliers, spray with carburetor cleaner avoiding the O-ring, and dry with an air compressor.
| Kubota BX23S | Kubota BX1880 | Kubota BX2380 | Kubota BX2680 | |
|---|---|---|---|---|
| PTO horsepower | 17.7 hp | 13.7 hp | 17.7 hp | 19.2 hp |
| Loader lift capacity | 1,407 lbf (LA340 pin-on); 1,286 lbf (LA340S quick attach) | 1,407 lbf (LA344 pin-on); 1,286 lbf (LA344S quick attach) | 1,407 lbf (LA344 pin-on); 1,286 lbf (LA344S quick attach) | 1,407 lbf (LA344 pin-on); 1,286 lbf (LA344S quick attach) |
| 3-point lift capacity | 1,213 lb | 1,151 lb | 1,213 lb | 1,213 lb |
| Hydraulic flow | 5.2 gpm | 5.2 gpm | 5.2 gpm | 5.2 gpm |
