Komatsu 707-98-58243 Control Valve Seal Kit Assembly

This control valve seal kit is designed for the pilot valve and joystick assembly on Komatsu PC120 series hydraulic excavators. It contains all necessary seals, O-rings, and backup rings to rebuild the control valve section and prevent hydraulic fluid leakage. The kit restores precise pilot pressure control for boom, arm, bucket, and swing functions. Compatible with multiple PC120 variants from PC120-1 through PC120-8, including PC128UU and PC130 series machines. Manufactured to meet or exceed OEM specifications for material hardness, extrusion resistance, and temperature stability in heavy-duty construction equipment hydraulic systems.