Caterpillar 2478790 Hydraulic Cylinder Seal Kit

Technical specifications: rod diameter 85 mm, bore diameter 120 mm. Seal kit comprises polyurethane (PU), polytetrafluoroethylene (PTFE), fluoroelastomer (FKM), and nitrile rubber (NBR) components designed for high-pressure hydraulic cylinder sealing. The kit includes rod seals, piston seals, wear rings, wipers, and O-rings to rebuild boom and bucket cylinders. Application coverage: compatible with Caterpillar 320C, 320D, 320D FM, 320E series, 323D, 324D, 325D, 330D, and 345C hydraulic excavators. Fits boom cylinders on 320C-320E models and bucket cylinders on 323D-330D, 345C models. Verify cylinder group and serial number prior to installation. Cross-reference interchange: replaces Caterpillar OEM 247-8790; aftermarket equivalents include CA2478790 (Suncar), CTC-2478790 (Hercules), and 2478790-ALT (IndustrialStop). Manufactured to OEM dimensional specifications for direct replacement.