Hitachi ZX135-7, ZX245-7, ZX345-7 Excavators

Models ZX135US-7, ZX245USLC-7, and ZX345USLC-7 are ultrashort tail-swing Hitachi excavators targeted for urban road projects. Operating weights are 31,973; 56,669; and 76,955 pounds; respectively. They replace Dash 6 versions.

The Hitachi ZX135US-7 excavator has a 19-foot 7-inch maximum dig depth and a bucket breakout force of 23,380 pounds. It uses the HIOS IV hydraulic technology designed for a responsive boom, arm, and bucket, and is powered by a 100-horsepower Isuzu engine.

The 164-horsepower Hitachi ZX245USLC-7 features a maximum dig depth of 21 feet 8 inches and a bucket breakout force of 35,520 pounds. It uses next-generation TRIAS III hydraulic technology designed for quick response to all control inputs while minimizing losses in the system. 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.

The 249-horsepower ZX345USLC-7 has a maximum dig depth of 24 feet 10 inches and a bucket breakout force of 45,411 pounds. It uses TRIAS II hydraulic technology designed for efficient use of available power.

Both the ZX245USLC-7 and ZX345USLC-7 allow attachment/arm priority to 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 using the monitor.

Hitachi excavator cabs

Cabs are larger than in previous models with increased 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. Low-effort pilot controls reduce operator strain. Switches have been collectively installed on the right side with easy access to those frequently used.