This premium aftermarket hydraulic arm cylinder is engineered as a trustworthy replacement part tailored for Hitachi EX370-5 excavators. As a pivotal hydraulic component of the working mechanism, it governs the extension and retraction of the arm to fulfill heavy-duty digging, material lifting and bulk earthmoving tasks. It is widely applied in road construction, mine exploitation, land reclamation and various medium and large engineering sites. All products are manufactured strictly following Hitachi’s original OEM standards and production techniques, featuring identical mounting dimensions, pin hole spacing and hydraulic port layout. On-site installation can be completed via direct bolt-on fitting without any cutting, welding or additional modifiions.

2. Core Technical Parameters

3. Product Advantages

1. Precise OEM Compatibility: All dimensions and structural details conform to original factory specifiions. It fits perfectly with arm linkages and hydraulic pipelines to maintain steady operation during long-duration working hours.
2. Sturdy Reinforced Framework: The cylinder barrel and connection lugs are structurally strengthened to withstand continuous dynamic loads and occasional bumps in rugged construction scenarios, extending overall service life remarkably.
3. Multi-Stage Quality Inspection: Each finished product goes through repeated full-stroke cycle tests and high-pressure airtight checks, completely ruling out hidden troubles of internal and external oil leakage.
4. Excellent Cost-Saving Value: It achieves the same operational stability and durability as authentic Hitachi components, assisting maintenance crews and spare parts retailers to cut down recurring purchasing expenses.
5. Versatile Shipping Options: In-stock goods can be dispatched within 3 working days. Air freight ers to time-sensitive orders, while sea freight is the ideal economical choice for large batch purchases.

4. Supplier Brief

Our manufacturing plant has accumulated rich experience in developing and producing hydraulic cylinders for Hitachi EX series excavators over the years. We provide a complete lineup of boom, arm and bucket cylinders for EX370-5 and other classic Hitachi equipment models. Supported by mature production craftsmanship and rigorous quality management rules, our products are continuously exported to aftermarket markets across Africa, Southeast Asia and the Middle East, gaining sincere recognition from overseas partners.

5. FAQ