This tapered roller bearing supports the PTO output shaft, managing both radial and axial loads as the shaft transmits engine torque to the implement driveline. It sits inside the PTO housing, where it maintains shaft alignment and prevents axial play under load. A worn bearing produces noticeable shaft wobble or growling noise during PTO operation, which can lead to seal leakage and eventual gear damage if not replaced. The bearing is manufactured to the original shaft and housing tolerances, so no shimming or adapter sleeves are required during installation. When replacing, clean the housing bore thoroughly and apply the specified preload torque to the retaining nut.