SHANTUI SD22 Spare Parts: SD22 Bulldozer Control Valve Assembly J20-06-09000

SHANTUI SD22 Spare Parts: SD22 Bulldozer Control Valve Assembly J20-06-09000

The bulldozer control valve assembly is a core component of the hydraulic system, primarily used to control the hydraulic oil distribution and pressure regulation of the bulldozer's working devices (such as blades and rippers) and travel system.

Working Device Control: Operates blade lifting/lowering, tilting, and other actions via the main control valve rod, and integrates protective components such as relief valves and safety valves;

Speed and Steering Control: Includes components such as speed valves and directional valves, regulating the bulldozer's gears and steering clutch oil pressure;

Pressure Protection: Limits the system's maximum pressure through the relief valve to prevent damage to hydraulic components from overload.

Common Faults and Maintenance

Blades not moving: May be due to insufficient oil supply caused by hydraulic oil leakage (such as a broken oil pump rotary seal). Check the seal and replace the oil seal;

Weak operation: Often caused by clogged filter or worn oil pump. Regularly clean impurities from the oil tank and replace the filter.