9078843 Boom / Bucket Cylinder Seal Kit for Hitachi EX270 EX300 EX400 Excavator

Premium 9078843 Boom & Bucket Cylinder Seal Kit for Hitachi Excavators

Eliminate hydraulic fluid leaks and restore the maximum digging and lifting capacity of your excavator with the WINSCHEN premium 9078843 Boom/Bucket Cylinder Seal Kit. Engineered to withstand the extreme operational pressures, heavy payloads, and abrasive environments of large-scale construction and earthmoving, this high-quality aftermarket repair kit ensures your Hitachi equipment operates safely and efficiently with zero pressure loss.

Key Features and Selling Points

• Manufactured to strict OEM dimensions, ensuring a precise and seamless fit for the boom and bucket hydraulic cylinders (95mm Rod x 145mm Bore) used in heavy-duty Hitachi EX-series excavators.
• Constructed from advanced elastomeric and heavy-duty PTFE materials to provide exceptional resistance to high hydraulic pressure, continuous rod friction, and extreme thermal variations.
• Effectively eliminates internal fluid bypass and external leakage, maintaining responsive hydraulic control and consistent mechanical force.
• This comprehensive seal kit includes all essential components—such as wiper seals, U-cups, buffer seals, T-seals, O-rings, and backup rings—required for a complete and reliable cylinder overhaul.
• A cost-effective, highly reliable aftermarket alternative that meets or exceeds original equipment standards, minimizing your machine’s routine maintenance downtime.

Compatible Equipment Models

Based on official catalog and parts cross-reference data, the 9078843 seal kit services the cylinders of the following Hitachi equipment:

• Crawler Excavators (EX Series): EX270, EX270LC, EX300, EX300LC, EX400
• Application: Boom Cylinder / Bucket Cylinder Hydraulic Service (95 mm Rod x 145 mm Bore)

Specifications

To guarantee 100% fitment, please verify your machine’s model, serial number, and original cylinder dimensions (e.g., 95mm Rod / 145mm Bore) with our dedicated support team prior to purchasing. We proudly offer fast and reliable global shipping to keep your projects on schedule.