The McCormick 3139591R96 is a genuine OEM hydraulic plunger, also known as a hydraulic distributor control piston. This essential component is designed for precise operation within the hydraulic system of McCormick CX series tractors, including models CX100, CX105, CX110, CX110LP, CX50, CX60, CX70, CX75, CX80, CX85, CX90, and CX95. Measuring 85 mm in length with a 25 mm diameter, it ensures reliable and efficient hydraulic function. This part replaces numbers 3139591R95 and 3139591R94.