The new ZX490LCH-7, ZX530LCH-7, ZX690LCH-7 and ZX890LCH-7 Stage-V compliant models are claimed to offer a fuel saving of up to 20% (PWR mode) compared to previous models, which is achieved by Hitachi’s HIOS-V hydraulic system.
Hitachi says this also enhances efficiency in the swing, boom lowering and arm bucket roll-out. Productivity is further increased by the improved front speed for loading operations; and the increased engine output of the new Zaxis-7 machines contributes to a higher workload.
The fuel efficiency of Zaxis-7 large excavators can also be controlled by using the new ECO gauge on the cab’s multifunctional 20.32cm (8”) monitor. Hitachi says that, besides reducing costs, better fuel economy has a positive impact on environmental performance. The new machines are Stage V-compliant due to the combination of the SCR (selective catalytic reduction) system, DOC (diesel oxidation catalyst) and CSF (catalysed soot filter).
The spacious cab is designed to offer operators comfort and quality, with reduced noise and vibration levels that are vital for the quarrying and mining industries.
New features include the synchronised motion of the seat and console – to reduce operator fatigue – and the adjustable console height with three positions to choose from. Easy operation comes from the ergonomic design of the console and switches, and the hi-res anti-glare 20.32cm screen is also designed to be easier to view.
Operators can control their own safety, as well as that of those around them, by using the Aerial Angle camera system which provides a 270-degree bird’s-eye view. Users can choose from six image options to see the machine’s immediate environment. When working in challenging conditions, new LED work lights and a windscreen wiper with an increased sweeping area further improve visibility.
Hitachi says that the undercarriage of the ZX490LCH-7 has robust new components that prevent potential damage. The ZX530LCH-7 has 30% greater traction force than the ZX490LCH-7 and increased steering force – particularly advantageous for manoeuvrability on sites with inclines, such as quarries.
The ZX690LCR-7 and ZX890LCR-7 models are built with reinforced parts that are suited for the digging and loading of heavy materials. Strengthened to cope with the rigours of quarrying and mining, they provide lower costs over the machine lifetime.
New maintenance and cleaning features on all Zaxis-7 large excavators include the fuel filter now being integrated with the water separator, while the larger radiator improves heat dissipation and is easier to clean.
Hitachi’s remote monitoring systems, Owner’s Site and ConSite, give users access to vital data and tools. Both systems send operational data via GPRS or satellite from the excavator to Global e-Service on a daily basis. ConSite summarises the information in a monthly email, while the ConSite Pocket app shows real-time alerts for any potential issues.
The quality of the engine and hydraulic oil is monitored continuously by two sensors that detect if the oil quality has deteriorated, with data being transmitted to Global e-Service. This feature provides customers with information on the condition of their excavators, and reduces maintenance and unscheduled downtime.
“We’re proud to present the latest range of Hitachi large excavators to our European customers,” says Hitachi Construction Machinery (Europe) NV president Makoto Yamazawa.
“Hitachi has continuously improved on previous generation machines to enhance the operator’s experience in the cab, to meet the needs of owners, and to provide support over the life cycle of our machines. By working in partnership with customers, we can help them to create their vision.”