HITACHI CONSTRUCTION MACHINERY

The new ZW Series is packed with lots of technological advances: the TT* system, newly developed hydraulic system and transmission, well matching of operations, impressive mobility and big production with less fuel consumption, and much more.
_{*Total Torque-control}

Three Work Modes to Increase Production and Decrease Fuel Consumption

Three work modes are selectable according to job needs and operator's preference. In each work mode, TT* system controls the total torque of the engine and pump for well matched penetration force and implement speed according to job needs. The three work
modes can be optimally selected to suit materials to be handled for higher production.

• P mode: Heavy-duty excavation

• N mode: Loading

• L mode: Light-duty operation

Three Driving Modes for Optimum Speed Shift
The three driving modes can be selected according to job needs and operator's preference.

L mode:
Starts with the second gear, and makes gear shift at fast timing. Suitable for long-distance travel on level ground.

N mode:
Starts with the second gear and makes gear shift at slow timing. Suitable for ordinary digging and loading operation such as V-shaped load and carry method.

H mode:
Makes gear shift at timing similar to the N mode, and automatically shifts down to the first gear according to loading conditions without need for shift down by DSS* or manual shifting.
_{*Down-Shift Switch}

Automatic Transmission with Load-Sensing System
Optimal speed shift timing is automatically selected in response to both travel speed and load.

High-Torque Engine and Capacious Torque Converter

• Max. output: 164 kW (220 hp)

• Rated output: 139 kW (186 hp)

• Max. torque: 981 Nm (100 kgf/m)

The new engine yields big torque at a low speed in direct response to acceleration without need for full throttle. The capacious torque converter enables powerful travel under heavy load, such as climbing steep or long hills without losing speed.

Torque Proportional Differential (Standard)
The torque proportional differential adjusts driving forces to both wheels. When road resistances under both wheels are different, this feature prevents slippage of a wheel on softer ground, unlike conventional differentials. This feature enables the ZW series to get
out of swamps or rough terrain easily.

Limited Slip Differential (Optional)
On snowy roads and rough terrain, the limited slip differential can work instead of the torque proportional differential. This delivers effective driving force to both wheels for enhanced grip and less slippage during travel.

Smooth Speed Shift by Electronic Control
Quick, smooth speed shift can automatically be done with less shocks by electronic control through helical gears. This allows speedy job-to-job travel with less soil spills in load-and-carry operation.

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