The Seal Ring (OEM Part No. 5590001177) is a replacement sealing component used in the wheel hub and axle assembly of Epiroc / Atlas Copco Scooptram ST1030 underground loaders. In the ST1030 parts documentation, 5590001177 is listed as a seal ring within the axle and bearing assembly. The seal helps retain lubricant inside the hub while reducing the ingress of dust, dirt and other contaminants during equipment operation. It is suitable for routine maintenance and replacement when the existing seal becomes worn, damaged, hardened or begins to leak. The 5590001177 Seal Ring helps maintain reliable hub lubrication, protect bearings and adjacent components, and support stable underground loader operation.