A new process to develop a hydraulic system adapted to biodegradable hydraulic oil for construction machinery

Therefore, in the 1990s, Germany, Switzerland, and Austria required the use of biodegradable hydraulic oil (hereinafter called bio-oil) in construction machinery, as such oil is broken down in a short period into carbon gas and water by natural microorganisms. This was enforced through administrative actions of local governments based on Germany’s Federal Water Act. The mandatory use of bio-oil in construction machinery has affected the entire EU regions and spread throughout the environmental protection areas. In 2002, the ISO standard was set for the quality standard of bio-oil. In 2011, the EU eco-label, which is equivalent to the Japanese eco-mark, was given only to bio-oil products that passed over 40 items of environmental toxicity tests.