Here’s some pics of a new replacement pinion gear for a Caterpillar Grader. The pinion mounts to the splined shaft of the circle drive motor. The part number for this pinion is 558-2101. The 5582101 pinions are normally extremely worn which require replacement every time we get a grader circle in with the drive motor assembly for rebuilding.
5435 Desert Point Dr. Las Vegas, Nv. 89118 Ph: (702) 649-2366 or (702) 649-0648 Fax: (702) 649-4133 www.MotorMission.com Facebook.com/MotorMission