This hydraulic pump supplies pressurized oil to the hydraulic system of a self-propelled forage harvester. It is mounted in the main hydraulic circuit and drives the flow that powers the machine's steering, header lift, and other auxiliary functions. A failing pump typically produces low system pressure, slow implement response, or audible whine under load. The manufacturer machines the housing and internal gear set to the same clearances as the original assembly, so no shimming or adapter plates are needed during installation. On replacement, ensure the suction line is clean and prime the pump before startup to prevent dry running.