8C3839 - Seal A Fits Caterpillar 8C-3839, 3Y8949, 5J3620One New Aftermarket Replacement Hydraulic Rod Buffer Seal for Caterpillar (Cat) Equipment This is an aftermarket replacement hydraulic rod buffer seal (Seal Assembly, Type B) for Caterpillar (Cat) construction and agricultural equipment. The 8C 3839 is a two piece bronze filled PTFE buffer seal with a rubber energizer that acts as a secondary rod seal, protecting the hydraulic cylinder rod from sudden increases in system pressure and pressure spikes.
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8C3839 - Seal A Fits Caterpillar 8C-3839, 3Y8949, 5J3620