XCMG Spare Parts CHECK VALVE 803438319

This is a genuine XCMG replacement check valve, part number 803438319. It’s designed to allow fluid flow in one direction only while preventing any backflow in your machine’s hydraulic system. This specific valve is commonly used in the load-sensing circuits on larger excavators and wheel loaders to maintain pilot pressure stability.

The valve body is machined from solid steel and has that standard industrial zinc-plated finish to fight off rust. Internally, it features a precision-ground poppet and a spring rated for cracking pressures around 5 bar. The threads are cleanly cut and standard metric, so it screws right into the manifold block without any hassle.

I pulled this one out of a brand new, unopened XCMG parts bag. It has the factory stampings on the hex and the fit and finish are spot on. There are no tool marks or any signs of it ever being installed, so it’s ready to go straight onto the machine.

If you're dealing with a dipper or boom drift issue, or if the machine reacts slow when you engage a function, a faulty check valve is often the culprit. Swapping in this new one is a straightforward fix that restores proper hydraulic logic and stops that annoying creep.

Just verify your old part number matches 803438319 before you swap it out. This is a common stock item for us, so it’s ready to ship. It’s a simple component, but a critical one for keeping your XCMG running tight and responsive.