Main Hydraulic Control Valve Pilot Valve Part Numbers: 723-36-10300, 723-36-10105, 723-36-10101 Compatible Models: PC120-6, PC110-6, PC100-6, PC130-6 Product Overview Pilot valve assembly for main hydraulic control valves designed for Komatsu hydraulic excavators. Ensures precise control and reliable performance in demanding operating conditions. Common Faults & Symptoms Insufficient swing torque, weak swing performance, difficult slewing under heavy load Unstable swing speed