The part numbered 419-43-37791 is a charge valve relief designed to regulate pressure in the hydraulic transmission system of Komatsu WA320-5 loaders. Engineered for stable flow and pressure control in machinery hydraulic circuits, this valve perfectly matches the original equipment coded 419-43-37791 (4194337791).
During hydraulic valve replacements, cleaning the gasket surfaces, inspecting O-ring conditions, and ensuring the system is free from debris are critical. Calibrating the hydraulic line pressure values according to manufacturer standards during assembly directly impacts the service life of the valve.
To confirm transmission and hydraulic system compatibility for your machine, make sure to verify the 419-43-37791 number and the WA320-5 model series on the removed old part.
