This hydraulic filter clogging sensor monitors the pressure differential across the filter element in the return side of the hydraulic circuit. When the element becomes loaded with debris, the sensor sends an electrical signal to the cab indicator, alerting the operator that the filter requires replacement. A clogged filter that goes undetected forces the bypass valve open, allowing unfiltered fluid to circulate and accelerate wear on pumps and valves. The sensor is a sealed electrical switch that activates at a preset differential pressure. As an original AGCO component, its actuation threshold matches the housing's bypass valve cracking pressure, so the warning light illuminates only when the element is genuinely loaded. On installation, verify the connector seals are clean and the O-ring is seated to prevent fluid ingress into the electrical contacts.