Excavator Komatsu PW160-7 PW180-7 Excavator Hydraulic Main Control Valve Part Numbers 723-57-17200 723-58-17200
Common Faults
- Insufficient flow of main control valve, weak and slow machine movements
- Spool sticking, single function failure and uncoordinated operation
- Internal leakage of valve block, insufficient pressure during combined operations
- External oil leakage on valve body, aged and damaged seals and O-rings
- Wear of valve bore and spool, unstable pressure and jerky operation
- Relief valve failure, system pressure cannot build up or abnormal high pressure
Purchasing Recommendations
- Verify part numbers and machine serial number to confirm compatibility with Komatsu wheel excavator
- Prioritize OEM parts or high-quality remanufactured parts; be cautious of low-cost generic spare parts
- Inspect valve body for cracks, check integrity of port threads and mounting flange before acceptance
- Confirm the main control valve assembly comes with a complete seal kit for easy installation and replacement
- Request warranty from supplier and retain factory inspection report
- Clean hydraulic tank, replace hydraulic oil and flush pipeline contaminants during valve replacement to avoid secondary wear