日立建機 ZX 70

Product Overview The Hitachi ZX70 is a 7-ton class hydraulic excavator manufactured by Hitachi Construction Machinery. It is designed for small to medium construction projects, road work, utility installation, and landscaping. Hitachi is known globally for reliability, fuel efficiency, and operator comfort. Key Specifications Operating Weight: 6,780 kg Engine Power: 44.4 kW (59.5 HP) Bucket Capacity: 0.33 m³ Max Digging Depth: 4,160 mm Max Dumping Height: 5,500 mm Max Digging Radius: 6,410 mm Travel Speed Low/High: 2.9 / 4.5 km/h Engine The ZX70 is powered by an Isuzu diesel engine. Isuzu engines are known for durability, low fuel consumption, and reliable cold starts. The engine meets EU Stage III and EPA Tier 3 emission standards. Fuel consumption is reduced compared to previous models while digging power remains strong. Hydraulic System The ZX70 features Hitachi's hydraulic system with three independent pumps. This system provides precise control and smooth operation for digging, lifting, swinging, and traveling. The auto-idle function reduces engine speed when controls are not used, saving fuel. The power boost function temporarily increases digging force when needed. Boom and Arm The boom and arm are made from high-tensile strength steel. The reinforced design improves durability in tough conditions. The offset boom allows digging close to walls, foundations, and other obstacles, which is valuable for urban construction sites. Undercarriage The ZX70 has a heavy-duty steel track frame with steel tracks as standard. Rubber tracks are available as an option for work on finished surfaces like asphalt and concrete. Track tension is adjustable using a grease gun. A dozer blade is available as an option for backfilling and grading. Operator Cab The cab is ROPS certified for safety. Large glass areas provide excellent visibility. The right side has a transparent lower window for better view of the bucket and track. The suspension seat reduces fatigue. Control levers are pilot operated for light effort. A digital display shows engine RPM, coolant temperature, fuel level, and service reminders. Maintenance The engine cover opens fully for easy access. Daily check points are easy to reach. The battery disconnect switch and fuel filters are accessible from ground level. The radiator and oil cooler are side by side for easy cleaning. A complete daily service takes less than 15 minutes. Safety Features ROPS cab protects the operator in a rollover. Anti-slip plates cover the track frames. The engine only starts when the hydraulic lock lever is in locked position. A reverse alarm sounds when backing up. An emergency hammer is inside the cab. Applications Residential construction: digging foundations and trenches Road work: digging drainage ditches and utility lines Landscaping: grading, digging tree pits, moving materials Farming: cleaning irrigation ditches and digging post holes Advantages The ZX70 combines an Isuzu engine, efficient hydraulics, and a comfortable cab at a competitive price. Fuel savings over time are significant. Hitachi has a global dealer network for parts and service support.