187-1503: 145mm Gage Diameter Intermediate Piston Ring

Description: Cat intermediate piston rings are split rings that fit into a groove on the OD of the piston body between the top ring and the oil ring. Piston rings function to form a seal between the piston body and the cylinder wall that prevents the loss of combustion cylinder gases to the crank case, maintains a constant level of lubricating oil between the cylinder wall and the piston and regulates engine oil consumption by scraping oil from the cylinder wall back to the sump. Attributes: • Steel intermediate piston ring • Surface hardened • Outside diameter (Gage): 144.975 mm (5.708 in) • For use with monotherm piston body • Emissions control Application: Consult your owner's manual or contact your local Cat Dealer for more information.