Pump/shaft/bearing Kit 584336401 Genuine OEM. This is a Genuine OEM part. This transaxle pump shaft and bearing kit (part number 584336401) is for lawn tractors. Transaxle pump shaft and bearing kit 584336401 rotates the cylinder block inside the transaxle. The rotating shaft moves the cylinder... - Pump/shaft/bearing Kit 584336401 Genuine OEM.