Kawasaki LL00090 Hydraulic Pump Regulator Assembly

The Kawasaki LL00090 regulator is a load-sensing control valve designed for the K3V63DTP series tandem axial piston hydraulic pumps. This component modulates pump displacement in response to system load pressure, maintaining optimal hydraulic flow and pressure for excavator functions including boom, arm, swing, and travel circuits. Constructed with hardened steel spool and cast iron housing, the regulator features precision-machined control lands and feedback linkage for accurate pressure compensation. It operates at system pressures up to 35 MPa (350 bar) with pilot pressure modulation. The unit is a direct replacement for the non-solenoid regulator variant used on Case CX130, CX135SR, and CX160 excavators equipped with Kawasaki K3V63DTP main pumps. Installation requires proper torque on mounting bolts and hydraulic line connections per OEM service manual. System contamination control is critical; flush hydraulic circuit and replace filters during regulator replacement to prevent premature wear.