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Hitachi TRIAS III hydraulic system

Hitachi Dash 7 excavators have the TRIAS III hydraulic system, a three-pump system that provides quick response to all control inputs while minimizing hydraulic losses, according to the company. A new arm roll-in metering control valve allows hydraulic pump power to be reduced when the arm is operated with a low load. When digging, the roll-in metering control valve reduces hydraulic pressure loss to the tank. This decreases the pump power needed for digging operations, improving fuel efficiency. Attachment/arm priority can be adjusted on the monitor to match the attachment or the operator's preference. When the attachment and arm are operated at the same time, the operator can adjust whether the speed of the attachment or the arm should be prioritized. The operator can also adjust boom raise priority. This can tailor the machine to do everything from truck loading to heavy digging. Read more at https://constructionequipment.com/330...