Description:Part # 8I-1556 provides a planetary carrier for the elevator drive speed reducer on the 615C Wheel Tractor-Scraper.Attributes:• Cast iron carrier• Internal Spline Number of Teeth: 27• Outside Diameter: 291 mm (11.46 in)• Width: 160 mm (6.29 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.