1915619 Hydraulic Cylinder Seal Kit for CAT 322C, 324D, 325C, 325D, 329E, 330C, 330D, 336D, 390FL Bucket Cylinder 2478853

The bucket cylinder takes the hardest hits in the digging cycle. When its seals wear, the bucket loses force, drifts, or leaves an oil film on the rod. This 1915619 seal kit replaces OEM 1915619 / 2478853 on the CAT models listed above, covering the rod, piston, and static sealing points.

The seals are PU and NBR. PU handles the pressure lips and sliding wear. NBR covers oil-side and static sealing. Profiles are molded to OEM groove dimensions, so they go in without trimming or stretching. You get the seals only — the barrel, rod, and piston are not included.

Check the machine serial and cylinder part number before ordering. These models can use more than one bucket cylinder setup, so the model name by itself may not be enough.