Construction work is always closely associated with the development of soil, which is impossible without excavators - earth moving machines of cyclic action. They are designed to move bulk materials, digging pits, trenches, excavating rocks, clearing paths, erecting embankments and a number of other operations. Therefore, when choosing this special equipment, it is necessary to give preference to proven and reliable specimens.
First of all, pay attention to the Japanese cars of Hitachi - a recognized world manufacturer of special equipment. The Hitachi excavator is a reliable, hardy and unpretentious worker who will cope with any correctly posed task in a short time. A huge range of earth moving vehicles of the concern will allow you to choose a copy for work in various conditions.
Types of Excavators
Hitachi financial and industrial group has existed since 1910. For all the time of its existence, it has gained vast experience in the production of construction equipment. The company's machines embody innovative developments and proven technologies. Therefore, the popularity of Japanese special equipment is growing every year.
In the lineup of the machine-building concern, the specimens are divided according to their dimensions. So, there are small, medium and large Hitachi excavators. The first type is designed to work in tight urban environments. Their dimensions may not exceed the size of a car. Such representatives are used for laying communications, digging shallow trenches.
Medium-sized machinery has a wider scope. It can be used at large construction sites, in small quarries, at receiving stations and in other areas. Oversized excavators are typically used for open pit mining. Their weight reaches 800 tons, and the duration of continuous operation can be more than a day.
ZX Series Excavators
The Hitachi wheeled excavator is, as a rule, a medium and small size technique. All models are presented in two series - ZX and ZAXIS-3. The special equipment of the ZX line is characterized by the following indicators:
- operational weight - from 13.4 to 20.3 tons;
- bucket working capacity - from 0.5 to 0.8 cubic meters;
- maximum digging depth - from 5.05 to 6.42 meters;
- power plant - 4 or 6-cylinder turbocharged diesel engine with water cooling.
The hydraulic system, which is equipped with suction and full flow filters, is responsible for the development of the soil. Power and speed are controlled by a stepper motor. The Hitachi ZX wheeled excavator operates in two modes - digging mode or attachment mode.
All representatives of the series are equipped with a shockproof valve, a quick warm-up system, two axial piston pumps with differentiable performance and a rotary platform.
ZAXIS-3 Excavator Series
ZAXIS-3 wheeled excavators are designed to work on large construction sites. They are characterized by the following indicators:
- operational weight - from 16.5 to 21.1 tons;
- bucket volume - 0.19-1.2 cubic meters;
- boom length - from 2.52 to 2.71 meters;
- power - from 90 to 122 kilowatts.
Each such Hitachi excavator, the price for which is within reasonable limits, is equipped with a HiosII hydraulic system, which has established itself as reliable and high-performance. The power plant is represented by a Isuzu diesel engine with direct fuel injection and water cooling.
In addition, the models are distinguished by the presence of automatic axle lock and brake retention systems, as well as a two-stage gearbox and variable displacement axial piston pumps.
Crawler Excavators
The company's crawler excavation equipment is available in two series - ZX-3 and EX-6. Typically, a crawler excavator ZX-3 has a weight in the range from 1 to 85 tons. They are used both in construction work and in mining. Representatives of the EX-6 model range are distinguished by their high operational weight (from 114 to 811 tons) and are used in quarries and during stripping operations.
Tracked models are distinguished by better cross-country ability and resistance to weather and climatic conditions. The operating temperature range is from -50 to +45 ° . There are specimens intended for working with rocky and heavy rocks, dismantling structures and operating in hard-to-reach places. Each crawler excavator can be equipped with a shortened boom and a larger bucket, if necessary, remove a large amount of soil in a short period of time.
Marking Crawler Excavators
The performance of the Hitachi crawler excavator depends on the equipment installed. You can find out the features of the machine by marking:
- LC - models with an extended mover, used on soft soils.
- LD - “direct shovel” excavators, designed to develop soil above the fulcrum.
- N - specimens for working with heavy and rock formations.
- K - modifications for dismantling work, equipped with attachments.
- MT - models with high traffic for work on a "cluttered" territory.
- USR, US and U are representatives with a shortened, small and "zero" radius of the turntable.
Such a wide range of equipment allows each client to choose exactly the model that he will need to perform a specific task.
Famous Representative - Hitachi ZX 330
The most popular representative of the company's crawler models is the Hitachi 330 excavator, which is powerful. Despite the fact that the instance belongs to the middle class of equipment, it successfully competes with heavy excavators. The reinforced construction of the boom and steps helps him in this, due to which both safety and productivity have grown. You realize the splendor of technology by examining the technical specifications.
Integrated automated functions and work operations have increased the functionality of the machine - it is suitable for the development of any kind of soil and for operation in difficult conditions.
One of the few disadvantages that the Hitachi 330 excavator has is its speed. It is only 5.5 km / h. Therefore, a special tractor is required for transportation to the place of soil development. The cost of such equipment is in the range of 7 million rubles.
Maintenance of special equipment
For reliable and uninterrupted operation, Hitachi excavators need high-quality and timely maintenance. Periodically, diagnostics of the electrical systems of equipment, inspection of hydraulic cylinders, and troubleshooting of the main components and assemblies should be carried out.
If a malfunction is detected, it is necessary to urgently replace the failed element. Fortunately, spare parts are available for Japanese equipment. "Hitachi" - excavators that will serve you faithfully for more than a dozen years, if you take good care of them.