RING - BACK UP (Crown CR73551-2)

CR73551-2: A worn back-up ring can allow seal extrusion under pressure, leading to fluid bypass and system inefficiency. The back-up ring type supports the primary seal by filling the clearance gap in a gland assembly. Catalog reference Crown CR73551-2 identifies this aftermarket replacement part. Its plain mechanical function is to prevent the seal from deforming into the extrusion gap during operation. A concrete generic failure consequence is that a missing or damaged back-up ring accelerates seal wear and causes leakage. Verify the serial number or application, then call (562) 693-7748.

Part number variants: CR73551-2, cr73551-2, CR735512, cr735512