XCMG QY50 Multi-Way Valve 803000420
For procurement teams: Send the complete three-number identity and a hose-position photo before disassembly; it is the fastest way to avoid a wrong valve bank.
Where It Works
This valve bank distributes oil to several crane functions, so spool arrangement and port mapping matter more than external resemblance.
Before You Quote
803000420 and 10100747 references
Full 4HPCV160320-25 code
Spool section count and sequence
Main, work and pilot port markings
Control actuators and relief settings
Failure Pattern and Root Cause
One slow function can be caused by a spool section, but pump flow, pilot pressure, cylinder leakage and load-control valves can produce the same complaint.
Installation Outcome to Verify
Label every hose, keep the bank surgically clean and do not change adjustments without data. Test each function separately, then combined movements, leakage and neutral pressure.
Explore Related Parts
XCMG QY50K Hydraulic Pump 803000260 · XCMG Balance Valve 803001825
Questions from Maintenance Teams
Can a valve with the same section count fit?
Not unless porting, spools and settings match.
Why does only one function fail?
Check its spool, pilot circuit and actuator.
Should settings be copied?
Use approved values, not visual screw position.
All ports are capped and controls are braced inside a reinforced crate.
