RING - BACK UP (Crown CR73551-002)

A damaged back-up ring can allow seal extrusion under pressure, leading to fluid leakage and system inefficiency. During assembly, this ring sits behind the primary seal to support it against high-pressure gaps. The part type generally functions as a rigid spacer that prevents the seal from deforming into clearance spaces. Keeping a back-up ring in sound condition helps maintain consistent sealing force over the operating cycle. This aftermarket replacement part references Crown catalog number CR73551-002. Verify the serial number or application, then call (562) 693-7748. The ring is a retaining ring category component used in sealing applications.

Part number variants: CR73551-002, cr73551-002, CR73551002, cr73551002