Boom cylinder seal kit

Boom Cylinder Seal Kits for Excavators and Heavy Equipment

Find aftermarket boom cylinder seal kits for excavators and heavy equipment at FAB Heavy Parts. These replacement kits are intended for servicing hydraulic boom cylinders, where worn or damaged seals can contribute to hydraulic fluid leaks and reduced sealing performance. Choosing the correct kit for your machine helps support proper cylinder function during lifting, digging, and other boom operations.

Boom Cylinder Seal Kits for Popular Equipment Models

Browse boom cylinder seal kits for a range of equipment brands, including Komatsu, Caterpillar, Kobelco, Hitachi, Case, John Deere, Kubota, Yanmar, Doosan, and Takeuchi. Available applications include Komatsu PC270-8, PC270LC-8, PC290LC-8, and PC308USLC-3; Kobelco SK200-6, SK210LC, and SK235SR; Kubota KX71-3, KX080-4, and KX161-3; and Yanmar ViO17. Other listings cover Caterpillar, Hitachi, and Case equipment, with compatibility varying by product.

When to Replace Boom Cylinder Seals

Hydraulic fluid around a boom cylinder may indicate worn seals, but leakage can have other causes. During inspection, look for visible oil leaks and signs of seal damage, and check the cylinder and related components for wear. Replacing seals can help restore hydraulic sealing when the cylinder's other components remain serviceable. Follow the machine manufacturer's service procedures for inspection, disassembly, and reassembly.

Choose the Correct Boom Cylinder Seal Kit

Before ordering, identify your equipment's make and exact model, then compare the part number and application details in the product listing. For example, this collection includes a boom cylinder seal kit with part number 707-99-59320 listed for Komatsu PC270-8, PC270LC-8, PC290LC-8, and PC308USLC-3. Do not assume that kits for similar models or different cylinder positions are interchangeable. Where applicable, use the machine serial number and the original part number to help confirm the correct application.