U-CUP (Crown CR73978-004)

A damaged U-cup can lead to fluid leakage and reduced system pressure. During operation, this seal type prevents fluid from escaping between a rod and its housing. The aftermarket replacement part references Crown as the OE maker and carries the cross-reference number CR73978-004. A U-cup’s primary mechanical function is to create a dynamic seal that moves with the rod. If the seal fails, the resulting leak can cause erratic movement or loss of function. Verify the serial number or application, then call (562) 693-7748. Call (562) 693-7748 after checking the serial number or application.

Part number variants: CR73978-004, cr73978-004, CR73978004, cr73978004