Swivel joint seal kit

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About Swivel joint seal kit

Swivel Joint Seal Kits for Excavators

Restore hydraulic sealing at the center swivel joint with a replacement swivel joint seal kit from FAB Heavy Parts. Also known as a center joint seal kit or swivel center joint seal kit, this component is used in the rotary joint that transfers hydraulic oil between the upper structure and lower travel system of an excavator while the upper structure rotates.

A worn or damaged seal in this assembly can contribute to hydraulic leakage or pressure loss between circuits. Selecting the correct kit is important because seal designs, dimensions, and internal components vary by machine and joint assembly.

Replacement Seal Kits for Multiple Excavator Brands

This collection includes swivel joint seal kits for selected Bobcat, Komatsu, Hitachi, Caterpillar, Sumitomo, Hyundai, Kobelco, Case, Doosan/Daewoo, John Deere, and Sany excavators. Available listings include Bobcat 6664903 and 6803396 kits, Komatsu kits for selected PC-series machines, and Hitachi center joint seal kit 4607611 for specified ZX-series models. 

Applications differ by product. For example, the Komatsu PC200-5 swivel joint seal kit is listed separately from kits for smaller PC-series excavators. Do not assume that a kit fits other machines from the same manufacturer simply because their model numbers are similar.

What to Check Before Ordering

Start with the original seal kit or center joint part number, then compare it with the number and equipment applications shown on the product page. If the machine has different model versions or serial-number ranges, check those details as well. Review the listed package contents when available to understand which seals, rings, and other components are included.

Need Help Finding the Right Swivel joint seal kit?

Can't find the replacement part you need? Send FAB Heavy Parts your part number, engine model, or equipment details. Our team can help review your requirements and provide a quotation.

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Frequently Asked Questions

How do I know which swivel joint seal kit fits my excavator?

Start by identifying your excavator's make, full model number, and serial number. If possible, locate the original swivel joint assembly or seal kit part number. Compare these details with the compatibility information in our swivel joint seal kit listings. If you cannot confirm the correct kit, send us your machine information and original part number so we can help you review the available options.

What's the difference between a swivel joint seal kit and a complete swivel joint assembly?

A swivel joint seal kit contains replacement sealing components used to service an existing hydraulic swivel joint. A complete swivel joint assembly includes the main rotary joint components as well. If your existing joint has damaged internal surfaces or excessive mechanical wear, replacing seals alone may not resolve the problem. We recommend inspecting the assembly before deciding which replacement is needed.

Can I order a swivel joint seal kit using only my excavator model number?

The excavator model is a useful starting point, but it may not be enough to confirm compatibility. Different production versions or swivel joint assemblies can require different seals. We recommend checking the original part number and machine serial number when available. If multiple kits appear suitable, contact us with your equipment details before ordering.

What should I check before installing my new swivel joint seal kit?

Before installation, confirm that the replacement kit matches your swivel joint assembly and compare the supplied seals with the original components. Inspect the joint's sealing surfaces for damage and follow the equipment manufacturer's service procedures for disassembly, seal installation, and reassembly. Hydraulic systems can retain dangerous pressure, so the system must be made safe according to the applicable service instructions before work begins.

Why is my excavator still leaking hydraulic oil after replacing the swivel joint seals?

Continued leakage can have several causes, including an incorrect seal kit, damaged sealing surfaces, assembly wear, or installation problems. First, confirm where the leakage originates and whether the installed seals match the specified joint assembly. If the problem continues, have a qualified technician inspect the swivel joint and related hydraulic components using the appropriate service information.

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