Hitachi Construction Machinery Develops Technology to Restore Used Hydraulic Oil

Tokyo, March 12, 2025 - Hitachi Construction Machinery Co., Ltd. (TSE: 6305; "Hitachi Construction Machinery") has established a technology to regenerate used hydraulic oil as part of its initiatives to support the realization of a circular economy.

From March 12, Hitachi Construction Machinery will start selling one medium-size ZX135US-5B (13-ton class) hydraulic excavator with recycled hydraulic oil that carries a manufacturer's guarantee as a used machine in Japan. In the future, the company will apply this technology to remanufactured hydraulic excavators in Japan and remanufacture the entire machine body, including the hydraulic oil.

The Hitachi Construction Machinery Group has been remanufacturing customers' used genuine parts to the same quality as new parts and selling them to the market for a long time. Besides, the Group has been remanufacturing hydraulic excavator main bodies and other construction equipment since 2021. Here, a medium-sized ZX135US-5B hydraulic excavator with more than 3,200 working hours was remanufactured to the same performance as a new one and will be delivered to the market again as second-hand machinery running on refurbished hydraulic oil. This is the inaugural occasion when Hitachi Construction Machinery has commercially applied refurbished hydraulic oil in utilized equipment.