1K7098 - RING-BACK-UP Fits Caterpillar (Fits CAT) !!!FREE SHIPPING!One New Aftermarket Replacement Back Up Ring Fits Caterpillar (Fits CAT) Construction Equipment This aftermarket replacement back up ring (backup ring) is a hydraulic sealing component used in the hydraulic cylinder assemblies of Fits Caterpillar (Fits CAT) backhoe loaders and compact track loaders. Installed alongside O rings, the back up ring prevents seal extrusion into clearance gaps under high hydraulic pressure, extending the service life of
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