This Chelsea 380123-12 12 V hydraulic cartridge valve (interchange DS563CS12M1) is a factory-engineered component designed for use with Chelsea 277-series power-take-off (PTO) systems. The valve features a heavy-duty cartridge design for direct insertion into PTO manifolds, offering precise directional and pressure control of hydraulic fluid to facilitate smooth PTO engagement or disengagement. Constructed with cast-iron and other premium materials, the unit is built for rigorous mobile hydraulic environments commonly found in dump trucks, utility vehicles, crane chassis and other vocational equipment. With verified compatibility to Chelsea part numbers 380123-12 and 38012312, this is an exact replacement part to restore OEM-level performance in your system. Please verify that the mounting interface, coil wiring, voltage, and system pressure of your equipment match this valve's requirements before installation.