A: Typical signs include slow boom or arm movement, unstable hydraulic operation, oil leakage, abnormal actuator response, and poor coordination between excavator functions.
A: Check the valve part number, spool configuration, hydraulic port connections, mounting dimensions, and hydraulic system cleanliness before installation to ensure proper operation.
A: Verify the original valve number, excavator model, hydraulic system specifications, and existing valve information before purchasing. Accurate matching helps avoid incorrect replacement issues.
A: Designed for construction machinery applications, the valve provides stable hydraulic control during long working hours, frequent operation cycles, and demanding job site conditions.






















