This valve is a shaft-type component that controls hydraulic flow within the front loader circuit. It mounts in the valve block and directs pressurized fluid to the lift and tilt cylinders in response to lever input. A worn or leaking shaft seal causes drift in the loader arms and reduces holding pressure. As an original Stoll part, the shaft is machined to the same clearance and seal-groove dimensions as the factory assembly, which maintains the correct spool centering and prevents internal leakage. On reinstallation, replace all O-rings and torque the valve-block bolts to specification.