Опорное кольцо, внутренний диаметр 191,3 мм Caterpillar 5690079

A Backup Ring, also called a backup washer, helps to support the primary sealing element and prevent it from extruding. It is made of an elastic material like rubber and provides a secondary seal to the cylinder head by reducing the chances of fluid bypass or leakage.Attributes:• Helps to reduce the friction between the mating parts• Manufactured to precise specifications and are built for durability and reliabilityApplications:A Backup Ring acts as a mechanical barrier in preventing the entry of external elements and protecting the primary sealing element along with the other sealing components inside the hydraulic bucket cylinder head.