Hitachi ZX 200 - an example of the best construction equipment from Japan

The Japanese company Hitachi is widely known in the world. The products she produces are in great demand. Special equipment of this brand is especially valued. A representative of the middle class of special equipment is the Hitachi ZX 200 excavator. Medium size and high performance allow the Hitachi 200 excavator to perform its tasks under any circumstances and load. Equipment is used in the construction industry to level the surface during work involving digging and compaction. The excavator also serves as an indispensable assistant in the development of pits, quarries and trenches. If you install an additional hydraulic hammer, the machine copes well with the destruction of buildings and structures. The large track area increases machine stability on soft soils. When used in hard-to-reach places, the excavator successfully performs all functions.

Scope of application

Hitachi ZX 200 is a special equipment that is used both in the construction and dismantling of concrete buildings. Using attachments, the excavator performs:

Hitachi ZX 200

• digging any holes;
• leveling horizontal surfaces;
• compaction of bulk materials;
• surface layout.

Thanks to its relatively small dimensions, the Hitachi ZX 200 excavator is widely used on construction sites with small areas. To increase the radius of operations performed, a telescopic boom mechanism can be installed on the excavator. The equipment works successfully in difficult areas with slopes and weak soil.

Features of the main components and assemblies

Power unit

Six-cylinder in-line four-stroke diesel engine Isuzu CC-6BG1T with turbocompressor equipment. Reduced fuel consumption with sufficient power is ensured by:

• robust design of the cylinder block and its head;
• direct fuel injection into the cylinder under electronic control;
• digital fuel distribution system between injectors with a common supply line and a built-in ultra-high pressure pump;
• improved speed control unit;
• efficient cooling system design - oil cooler, radiator, intercooler are arranged in parallel, taking full advantage of the air flow from the engine fan.

The machine is switched from the normal operating mode “PWR” to the energy-saving “ECO” mode using the button on the control panel.

Machine hydraulics

Ensures the operation of executive equipment in 15 programmable modes and with manual control, the working stroke and maneuvers of the unit. The HIOS III hydraulic system reduces cycle times:

• using the boom mechanism’s own weight in lowering mode, thereby increasing the rate of boom movement;
• increasing the speed of pulling the arm with the bucket by merging the flow of working fluid through the hydraulic cylinders of the boom and arm.

The system operates on the basis of:

• two pumping units of axial piston type with load-variable capacity;
• control circuit gear pump;
• pairs of axial piston hydraulic motors providing travel drive;
• axial piston hydraulic motor for rotating platform drive.

Working equipment

The base of the boom and its upper part are reinforced with brackets made of high-quality steel. The hydraulic cylinders of the boom mechanism and arm are equipped with damping devices. Pivot bushings provide a tight fit for the pins. The bucket device is connected to the handle with a finger with a layer of thermally sprayed tungsten carbide.

Platform and turning mechanism

The unit is assembled on a D-shaped frame. The rotational force on the slewing bearing, assembled as a single-row roller bearing, is transmitted from a hydraulic motor through a planetary gearbox operating in an oil bath.

Stopping the turn is ensured by a constantly engaged disc brake, controlled by hydraulics.

Hitachi excavator with hydraulic hammer

Specifications

Technical characteristics of the Hitachi ZX 200 meet all the requirements for modern technology:

Hitachi ZX 200 - dimensions

Motor

Isuzu AH-4HK1XYSA-02

The Hitachi ZX 200 crawler excavator is equipped with an Isuzu AH-4HK1XYSA-02 power unit. This is a four-cylinder engine that runs on diesel fuel. Fuel consumption at average load intensity is 14 liters per hour. The traction force that resists the movement of the machine for this model is 184 kilonewtons. The maximum power is 122 kilowatts, which is equivalent to 166 horsepower.

The number of rotations of the crankshaft is 2 thousand revolutions per minute. Torque is a vector quantity equal to the force vector times the radius of the vector. The value of this parameter is directly related to engine power. It indicates the number of revolutions at which maximum engine power is used. Hitachi ZX 200 has a torque of 655 N/m.

The engine cooling system is liquid. The Isuzu AA-6BG1T engine has 6 cylinders. Their diameter is 115 mm. The piston stroke is directly related to engine power. The smaller it is, the higher the power. For the Hitachi ZX200 excavator it corresponds to 125 millimeters. The volume of all four cylinders is 5100 m3. The engine runs on diesel fuel.

Motor Isuzu AA-6BG1T

Device

The equipment comes complete with a counterweight weighing 5.35 tons, which allows it to maintain stability during operation. The hitachi 200 crawler excavator is equipped with an arrow, the length of which is 5.68 m. The controllability of the machine is at the highest level due to the increased engine speed. If there is a need to maneuver or lift, the rotation speed of the excavator engine automatically increases. The main wheels have the property of being interchangeable. To increase the service life, it is planned to increase the parameters of the rollers and brackets for securing them. The track links are shaped to provide reinforcement to the belt, thereby increasing rigidity. The track elements are controlled by an axial piston motor, which has a planetary gearbox. Moreover, each link has its own motor. For this model, a box-shaped cross-shaped central beam has been developed, which reduces the corrosion process and increases resistance under load. If we compare its strength, it has increased by 35% compared to previous models. The cross-beam plates at the top and bottom are made without the use of welded parts, which affects the strength of the structure. As for the chassis, the presence of a hydraulic drive significantly increases the speed of operation of the modules and the speed when lifting. The hydraulic drive significantly reduces fuel consumption and increases efficiency. Hydraulic properties:

• The highest oil supply value is 32 l/min
• Hydraulic displacement circuit – 34.3 MPa
• Turning hydraulic circuit – 30.4 MPa
• Hydraulic circuit of the working device - 34.3 MPa
• Hydraulic circuit of the signal from the equipment – ​​3.9MPa

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The gearbox on the excavator is mechanical. There are two types - high and low speed. The machine has a hydraulically driven disc parking brake. The optimal completion of the stroke is due to the presence of a safety valve located in the stroke motor. It protects the mechanism and structure from water hammer during shutdown.

Chassis

The chassis of a car is a combination of interacting mechanisms designed to ensure comfortable movement on the highway. The connecting link between the body and the wheels of the Hitachi ZX 200 is equipped with hydraulic drives. The hydraulic system significantly increases the speed of movement of all units of special equipment. With the help of hydraulic equipment, the machine can easily overcome inclines.

Hitachi ZX 200 - chassis

Hitachi ZX 200 is equipped with a manual transmission. Switching occurs with the participation of an electric motor. The system has two speed modes. There is no standard power transmission, but two-speed driving is provided. In high mode the speed reaches 5.5 km/h, in low mode – 3.6 km/h. The equipment has two batteries of 12 V and 55 A/h. This indicates that the battery can be charged with a current of 5 amperes for ten hours.

The maximum tilt angle for this machine is assumed to be within 35 degrees. If during the moving process there is a need for larger parameters, then additional equipment is used.

Control system

The control system of this special equipment includes:

Hitachi ZX 200 operating parameters

• on-board computer;
• engine power regulator;
• gearbox;
• wiper;
• lighting;
• bucket control mechanism.

All data about the state of the machine is displayed on the computer panel. The engine power regulator allows you to set the equipment to idle speed. All this data can be seen on the on-board computer monitor. The bucket control and windshield wiper functions are also located there.

Cabin

Operator workstation Hitachi ZX200

The operator's cabin is comfortable and safe for work. The driver has the opportunity to choose a comfortable position. You can operate the machine while sitting or standing. The ceiling height in the cabin is about three meters, which is quite enough even for a tall person. There is a wide windshield at the front of the cabin. There are also two large windows in the back. All this indicates good visibility while performing various tasks.

LED spotlights are installed on the roof. This allows you to carry out work in the dark. A comfortable microclimate in the cabin is provided by the air conditioning system. Coordination of equipment is carried out using joysticks, which are located in the middle part of the control panel. The driver's cabin is equipped with a radio capable of playing music from modern media. It is located above the control panels. The partition beams create additional strength for the cabin, made of high-quality metal that is resistant to corrosion.

Peculiarities

The Hitachi ZX-200 excavator has a fairly comfortable cabin, and the basic package included all the necessary elements necessary to carry out various works while maintaining favorable conditions for the operator, namely:

1. Fully adjustable, comfortable operator's seat.
2. Radio.
3. Heater.
4. Air filtration system.
5. Windscreen wipers.
6. Window washers.
7. Adjusting engine performance.
8. Stroke adjustment (only two modes: high and low).
9. Idle speed switch.
10. An on-board computer that includes all the necessary functions.

Optionally can be added:

• Engine preheating.
• Satellite control.
• Climate control.
• Units designed for various work in marshy areas and coastal areas.
• Equipment designed for collecting silt and bottom debris (indispensable in cleaning rivers).
• Devices designed to increase the depth of reservoirs.
• Equipment for cleaning irrigation canals.

The cabin itself is made of high-strength metal with anti-corrosion materials. The windshield occupies a fairly large area, which has a positive effect on overall visibility from the workplace. Also, operation of the Hitachi 200 crawler excavator is possible even in the dark, since an LED lamp is installed in the upper part of the cabin.

In addition to all this, this model of equipment is also famous for its low fuel consumption, relative to other analogues, and high stability on various surfaces, which was achieved thanks to the wide caterpillar track.

Attachments

The design of the Hitachi ZX 200 excavator allows the use of various types of attachments:

• An earthmoving bucket is the main mechanism for performing earthmoving work. It is used for soils whose density does not exceed 1500 kg/m3.
• A ripper bucket is a mechanism used to perform work with very dense soil.
• A trench bucket is a mechanism that is used directly for digging trenches.
• Leveling bucket. There are several models of this attachment, differing from each other in width, weight, tilt and rotation. A replaceable knife can be installed on any model.
• A single-tooth ripper is equipment used to loosen soil.
• Mulcher. The device is used for grinding wood species: trees, stumps and other things. It is used for clearing construction sites, preparing routes for laying pipelines, and in arranging roadsides.
• Hydraulic hammer - is a lance with a diameter of 135 mm, which is capable of making at least 400 blows per minute. This is an indispensable equipment for dismantling and removing asphalt pavement.
• Hydraulic shears are a hydraulically driven tool capable of cutting, expanding, pulling, cutting, squeezing. It is intended for dismantling of buildings made of concrete and reinforced concrete.

The Hitachi ZX 200 crawler excavator is an example of an excellent combination of excellent technical characteristics and service life.

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Price new and used

Due to the cessation of serial production of the Hitachi ZX-200 crawler excavator, currently only samples with a certain operating time are available on the markets. The cost for them starts from 2.5 million Russian rubles. But it is worth noting that some construction companies still have completely new Hitachi models, the basic equipment of which can cost 5.5 million Russian rubles.

The most popular option is renting. The cost of one working hour starts on average from 4 thousand Russian rubles.