Right-hand hydraulic pump used on certain Scag zero-turn mowers, including the Turf Tiger. Its official Hydro-Gear part number is. And it may also be identified by the part number. It’s manufactured by Hydro-Gear, an OEM supplier for Scag. This pump is replacement for SCAG TURF TIGER 52, the pump is also compatible with. SMST-72A Sabre Turf Tiger (S/N A7600001-A7699999). SMST-72A Sabre Turf Tiger (S/N E0000001-E0099999). STT72V-35BVAC Tiger Cat (S/N K2700001-K2799999). STT72V-31KB-DF Turf Tiger (S/N K7600001-K7699999). STT72V-26DFI Tiger Cat (S/N K2600001-K2699999). STT72V-26CH-EFI Tiger Cat S/N K2500001-K2599999.