One New Aftermarket Replacement Hydraulic Gerotor Motor Group Fits Caterpillar (Fits CAT) Motor GradersThis hydraulic gerotor motor group (also known as a hydraulic orbit motor) is used in the circle drive hydraulic system of Fits Caterpillar motor graders. It converts hydraulic fluid pressure into rotary mechanical energy to power the circle drive, enabling precise blade rotation and grader control functions.Specifications Type: Hydraulic gerotor (orbit) motor Housing: Cast iron construction Rotation: Bi-directional Mounting: OEM bolt-on configuration Compatible ModelsFits Caterpillar Motor Graders: 12G, 12H, 12K, 12M, 120G, 120H, 120H ES, 120H NA, 120K, 120M, 130G, 135H, 140G, 140H, 140K, 140M, 143H, 160H, 160K, 160M, 163HReplaces Part Number(s):1053196, 105-3196, HYM40-0157Aftermarket Interchange Numbers8J-5407, 8J5407, 9T-5976, 9T5976, 9J1300, 9J4966New aftermarket replacement part - not remanufactured, not used.