Description:Part # 186-8990 provides a bearing retainer with pressure relief fitting for the oscillating axle on the R1300/R1300G/R1300G II Load Haul Dump.Attributes:• Relief Pressure: 105-175 kPa (15.2-25.4 psi)• Inside Diameter: 310 mm (12.20 in)• Outside Diameter: 391 mm (15.38 in)• Width: 25 mm (0.98 in)• Hole Size: 10.5 mm (0.41 in) (12X)• Thread Size: 1/2-13 (2X)Application:R1300/R1300G/R1300G II Load Haul DumpConsult your owner's manual or contact you local Cat Dealer for more information.