Product Overview This is a closed-center, load-sensing variable axial piston main hydraulic pump (PPPC system) designed for motor graders. It delivers reliable hydraulic power for blade lifting, steering, and other grader working functions. Part Number 6E-3136 6E-3137 Interchange Number 0R-7682 Replacement Assembly Part Numbers 169-4882, 169-4883 Displacement 74 cc/rev Rotation Counter-clockwise Max System Pressure 24,750 kPa (3,590 psi) Compatible Models CAT 120H, 120K, 12H,