Hitachi TRIAS III Hydraulic System

March 21, 2023

Model ZX210LC-7 Hitachi excavator has an operating weight of 49,833 pounds and a maximum dig depth of 21 feet 11 inches. The 164-horsepower excavator has bucket breakout force of 35,520 lb.-ft.

The Dash 7 machine has 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.

The cab is larger than the Dash 6 version and has more head clearance. A one-touch adjustable air suspension seat is synchronized to move with the console. Noise has been minimized by increasing the thickness of the rear glass. Improved airtightness of the cab keeps the dust out, even when the air conditioner is started.

Four fluid-filled elastic cab mounts reduce vibration when traveling. An 8-inch (20.32-cm) anti-glare LCD monitor provides visibility, even in bright surroundings. It also controls the Bluetooth radio. The operator can listen to music and make hands-free calls from the cab. Long-lasting LED lights provide visibility in challenging conditions.

Low-effort pilot controls reduce operator strain. For convenience, switches have been collectively installed on the right side with easy access to those frequently used.

Aerial Angle peripheral vision camera system provides a 270-degree bird’s-eye view of the machine’s immediate environment. The operator can select the view on the monitor that best suits the situation. A rear-view camera allows the operator to see the area right below the counterweight.

ConSite telematics now has as standard ConSite OIL, which monitors engine and hydraulic oil conditions to proactively catch issues before any fault codes are triggered in the machine. ConSite Air allows the excavator to be diagnosed remotely and allows remote updates of the software.