Heavy-Duty Center Joint Seal Kits: Stop Hydraulic Leaks & Restore Tracking Power

Is your excavator pulling to one side or losing power in the travel motors? A failing center joint seal kit (also known as a swivel joint seal kit) is often the hidden cause of internal hydraulic bypass. The center joint is responsible for transferring pressurized fluid between the stationary undercarriage and the rotating upper structure. BeeSpareParts offers high-quality aftermarket center joint repair kits engineered to eliminate leaks and restore full tracking performance.

Our compatible seal solutions are manufactured with advanced PTFE-based Glide Seals and high-pressure Nitrile (NBR) O-rings. These materials are chosen for their low friction and excellent wear resistance during continuous 360-degree rotation. Whether you are performing routine maintenance or a full rebuild, our kits provide a direct fit for Caterpillar (CAT), Komatsu, and Hitachi excavators. Each kit includes all necessary rotary seals, backup rings, and dust wipers to ensure a reliable, leak-proof connection across all hydraulic channels.

Key Performance Benefits:

  • Eliminate Tracking Issues: Restores equal hydraulic flow to both travel motors, fixing "steering drift" caused by internal leaks.

  • Superior Rotation Durability: Engineered to withstand the constant friction and heat of high-cycle slewing operations.

  • Precise Compatibility: Tailored kits designed to fit for CAT 320D, Komatsu PC200-8, and Hitachi ZX200 models.

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