Komatsu PC56 Control Lever Seal Kit

This hydraulic seal kit is designed for the pilot control valve assembly on Komatsu PC56-7 mini excavators. It contains all necessary seals, O-rings, and backup rings to rebuild the control lever hydraulic circuit, ensuring precise spool actuation and eliminating internal leakage that causes drift or slow response. The kit components are manufactured from high-grade nitrile rubber (NBR) and polyurethane (PU) compounds compatible with mineral-based hydraulic fluids. Each seal profile matches OEM groove dimensions for the PC56 series pilot valve, rated for continuous pilot pressures up to 5 MPa and operating temperatures from -30°C to 100°C. Installation requires standard hand tools and clean hydraulic practices; no special tooling is needed. Cross-referenced to Komatsu OEM part numbers for the PC56-7 pilot valve seal kit. Suitable for machines equipped with S4D87E-1 diesel engine. Verified fitment for serial number ranges applicable to PC56-7 and PC56-8 models.