SEAL BACK UP (JLG JL91514216)

A damaged seal back-up can allow pressurized fluid to bypass the primary seal, leading to gradual leakage. During inspection, a worn seal back-up may show deformation or cracking from repeated pressure cycles. Seal back-up condition directly affects the ability of the primary seal to maintain a consistent barrier. Keeping a seal back-up in sound condition helps prevent contamination ingress that accelerates seal wear. This aftermarket replacement part references the JLG catalog number JL91514216. The part functions as a rigid support ring that prevents extrusion of the primary seal under high pressure. Verify the serial number or application, then call (562) 693-7748.

Part number variants: JL91514216, jl91514216