Since 1969, Japanese engineering began to supply construction equipment to the Soviet Union. Over the years, the company has developed its activities, focusing on the international market, and introduced the latest developments into production. At the beginning of the 21st century, the Komatsu Group had about 180 branches and became a world leader in the production of construction, earthmoving and mining equipment and components, industrial and electrical equipment.
In September 2011, Ivanovo (Russia), which manufactures excavators, bulldozers and forklifts, repairs and maintains equipment, together with Yaroslavsky produced the first domestic heavy-duty (91 t) dump truck HD 785-7 for quarries.
Due to its high quality products, great productivity and efficiency, the Komatsu excavator is in demand among users.
It is necessary to consider modifications of Komatsu earthmoving and construction crawler units and wheel front loaders, characteristics and features.
Purpose
The Komatsu excavator is a general purpose hydraulic machine used in many sectors of the municipal and national economy, road construction, mining and logging industries.
Depending on the working equipment, the scope of use of the units is different. This could be work such as:
- mining of rocks and minerals;
- loading bulk and construction materials;
- digging soil for pits, pits, trenches, ditches with further unloading into dump trucks or on board;
- stripping operations;
- leveling construction sites;
- dismantling of old buildings and structures;
- foundation breakdown;
- clearing the area of debris or snow;
- transportation and movement of goods.
To expand functionality, auxiliary hinged mechanisms are used:
- hydraulic hammer;
- hydraulic shears;
- borax;
- copra;
- dumps;
- forks for moving loads.
Earth-moving and loading equipment is divided into 3 groups according to purpose:
- universal construction units with a 0.15-2 m³ bucket and full rotation on pneumatic wheels or tracks;
- mining excavators with special-purpose or semi-universal shovels with a bucket capacity of 2-8 m³ for operation in difficult conditions;
- overburden machines with a large bucket over 8 m³, used to remove the top soil layer.
Excavator Komatsu PC 4000
This model of Komatsu excavator is characterized by high power, while fuel consumption is very low. It is universal - used in metallurgy and industry. This is one of the best types of earthmoving equipment for construction work. It withstands any manifestations of unfavorable climate and works with the heaviest types of soil. It has a strengthened digging function, which is why it is chosen for complex work.
Technical data
Engine performance indicators:
- Effective power – 1400 kW.
- Power – 1800 rpm.
- Aspiration – turbocharging and outlet cooling.
- Cylinders – 16 pieces.
The machine and all its equipment weighs 390 tons. Its maximum speed is 2.1 km/h. The bucket is able to accommodate 22 cubic meters of soil. The length of the arrow is about 10 meters. The depth of the dug pit reaches a maximum of 8 meters. The digging radius extends to 17 meters. Equipped with a 60 HP engine. The tank is designed for 6.5 liters of fuel. The power of this giant is 1875 horsepower. The speed at which the platform can rotate is 4 revolutions per minute.
Komatsu PC 4000 excavator - technical specifications of the model
Characteristics of the vehicle chassis:
- Maximum speed – 1 km/h.
- The number of upper rollers is 3, the lower ones are 7.
- The number of track tracks on each side is 47.
- The width of the support with a backhoe is 3.8 meters.
- The width of the bucket loader support is 4 meters.
This is a crawler excavator, the mobile belt is 1.2 m wide and 8 m long.
Performance indicators of the Komatsu 4000 excavator:
Overall dimensions of the KOMATSU PC4000 excavator
- Fuel tank volume – 6400 l.
- Coolant volume – 475 l.
- Engine oil volume – 290 l.
- Hydraulic fluid volume – 5900 l.
- Platform rotation speed – 4 rpm.
- Operating voltage: 24 V.
- The current strength in the generator is 225 A.
The excavator is notable not only for its technical performance. Its spacious cabin is equipped with climate control, noise and vibration insulation, and a large windshield. It gives a wide overview, increases the convenience and accuracy of handling the bucket.
Device
The Komatsu excavator is a hydraulic device consisting of the following functional units:
- Rotary support mechanism.
- Pneumatic wheel part or caterpillar.
- Frame.
- Outriggers (outriggers).
- Rotating base.
- Pylon stands for articulated connection of the boom with the platform.
- Arrow.
- Telescopic handle.
- Backhoe bucket.
- Hydraulic cylinders for controlling the boom, arm and bucket.
The excavators are mounted on a welded rigid central X-shaped frame with box-section bogies and a slewing bearing. The following systems and components are mounted on the frame:
- Engine.
- Boom mechanism of working equipment.
- Hydraulic system.
- Operator's cabin with controls.
- Counterweight.
Crawler excavators are equipped with 4-stroke 6-cylinder diesel engines with a powerful turbocharger and charge air cooling system. Diesel power for middle-class cars develops to 150-353 hp. With. A single electronic mechanism controls the motor and hydraulic equipment. The engines are characterized by low toxicity and high environmental friendliness, which meet the requirements of EPA Tier 3 and EU Stage 3A standards, and economical fuel consumption in different modes.
The platform's rotating system operates through a planetary gearbox and is driven by an axial piston hydraulic motor. The slewing support mechanism is equipped with a hydraulically locked service brake and a mechanical disk-type platform holding unit. The tractor is moved by 2 axial piston engines with a parking brake.
Power transmission - hydrostatic drive. Torque transmits the energy of fluid pressure to the hydraulic motors of the planetary gearboxes of the driving sprockets of the tracks.
The hydraulic system is an advanced HydrauMind technology with a closed control center, valves for measuring loads and pressure, measuring operating modes.
The pumping mechanism for the boom, arm, bucket and platform circuits is a variable displacement piston.
The operator can select any of 6 operating modes to improve the rotation of the motor and pump mechanisms and increase the pressure in the hydraulic system.
The operating modes are presented as follows:
- High power mode - maximum efficiency with minimum cycle time.
- Economy mode. Fuel economy is 20% lower than in the previous mode. Performance and power are not reduced.
- Load-lifting mode. Used when changing equipment to adjust the speed of the mounted mechanism. The lifting capacity increases by 7% taking into account the increase in hydraulic pressure.
- Hydraulic hammer mode. Optimal ratios of engine rotation speed and fuel consumption.
- Attachment mode/high power mode. Corresponds to the optimal diesel engine speed, 2-channel hydraulic circuit, operation with increased traction characteristics and high hydraulic system performance.
- Attachments/economy mode. Optimal engine rotation speed on a 2-channel hydraulic circuit with savings in fuel consumption.
In the manufacture of the cabin structure, high-quality noise-insulating, moisture-proof materials and spare parts were used. Therefore, the cabin has increased strength, perfectly absorbs noise, is heat-resistant and sealed. It is made using ROPS technology, which protects the driver from external mechanical influences and rollovers, and is installed on damping supports with an increased working stroke and a spring to reduce vibration fluctuations during operation.
The driver's seat is soft, sprung, and adjustable in height and tilt using a handle. The cabin is equipped with air conditioning and an air filter to seal the parts, as a result of which dust does not enter the interior. The climate control system allows you to regulate the temperature inside the excavator. Comfortable conditions are maintained in any weather. A defroster mechanism has been developed to ensure glass transparency.
Excavator Komatsu PC 220
This representative is not the most powerful of the line; it belongs to the average level. It is considered universal and is used for loading operations, digging pits and trenches, and is very popular in this matter.
PC 220 crawler excavator
This model is chosen by all major buyers due to its high-level technical qualities and fairly low price when compared with more advanced and powerful Komatsu options.
The PC 220 crawler excavator is equipped with wide supports, which ensures reliability during operation. It is stable and can also provide good maneuverability on loose surfaces. It is able to overcome descents and ascents with a 70% incline.
Compared to previously released excavators from this company, the Komatsu 220 has a longer chassis. It consists of a cross-shaped frame. There is a hydrostatic system that allows the platform to rotate.
Model specifications
A four-stroke engine running on diesel fuel is installed. It has a liquid cooling system. Controlled by two levers and pedals. Here are its main characteristics:
- Working volume - 6.7 l.
- Cylinders - 6 pieces.
- Power - 134 kW or 179 hp. With.
- Rotation speed - 2000 rpm.
- The injection system is direct type.
- Starting system - electric starter.
- The cylinder diameter is 107 mm.
- Fuel consumption - 16.2-22.1 l/hour.
A special advantage of all excavators from this manufacturer is their comfortable cabin. The Komatsu 220 has an air conditioner for cooling and heating the air, as well as an air filter to protect against dust entering the cabin. The control levers have an ergonomic shape and optimal length for operator comfort. The chair is adjustable, its backrest reclines back to the desired level. Cab windows provide full visibility of the entire work site.
Excavator PC 220 - overall dimensions
Main parameters:
- The weight of the machine is about 23 tons.
- The width of the caterpillar is 4 meters.
- The bucket holds 1 cubic meter of soil.
- Digging depth – 7 meters.
- The maximum speed that the excavator develops is 5.5 km/h.
Advantages of the model
Selecting modes for the RS-200 excavator
An important quality of this technology is ease of maintenance. Any part that needs the most frequent replacement or repair is in an accessible position for workers. If equipment fails, you can easily find the cause and quickly eliminate it.
The functionality of the machine is not limited to digging holes and ditches. It can be used to make embankments, compact or level soil, destroy concrete structures, move bulk cargo and remove debris.
In addition, the design allows the installation of attachments, which can further expand the capabilities.
Advantages and disadvantages
The Komatsu excavator has a number of advantageous features:
- mobility;
- maneuverability;
- low pressure on the soil;
- does not harm the road surface;
- high cross-country ability;
- stability on slopes;
- operation in difficult climatic zones;
- free access to parts and components;
- large interval between regulated maintenance;
- high efficiency;
- availability of spare parts and components;
- maintainability.
The disadvantage of the models is the inability to independently move to the place of work.
Excavator Komatsu PC 8000
The Komatsu 8000 excavator has even greater capabilities than the previous model. It is used in quarries, for the extraction of metals and rocks, for excavating soil on an industrial scale, and in construction.
It is maneuverable and stable. Powerful yet easy to control. This is a reliable technique that lasts a long time and rarely requires repairs, and is not burdensome to maintain. Good tolerance to any weather conditions makes it attractive for use in areas with harsh climates.
Characteristics
Dimensions of the Komatsu excavator in meters:
- Width – 8.15.
- Height in transport position – 12.8.
- Length in transport position – 22.9.
Its feature is very high performance. It is designed and created specifically for use in the most challenging areas - metallurgy and mining. It makes it possible to quickly carry out work with huge volumes of soil, minerals or other bulk cargo.
Indicators of the Komatsu 8000 excavator describing its operating capabilities:
- The maximum lifting height of the bucket is 16.7 m.
- The depth of the trench is 8.2 m.
- Breakout force – 204 t.
- The force on the handle is 183.5 tons.
- Boom length – 11.5 m.
- Handle length – 5.5 m.
Relative to its high power and performance, it consumes fuel quite economically. Its reliability during work and stability on uneven surfaces is achieved by correct and precise weight distribution. The equipment is environmentally friendly, its engine has low toxicity, which is typical of Japanese technology. It is pleasant to work on and easy to operate - comfortable conditions are created in the cabin, the controls are ergonomically shaped.
Excavator Komatsu 400
This is the most improved version among the Komatsu lineup. It delivers excellent performance under the toughest operating conditions and is easy and enjoyable for the operator to operate. Its assembly includes innovative developments and innovations from the technological world.
The equipment was created specifically for extreme and dangerous conditions, therefore it has high reliability of all structural elements. Requires repair or replacement of components extremely rarely. The engine oil filter needs to be updated after 500 operating hours, and in the hydraulic system - after 1000 operating hours.
Technical description of the model
The excavator has the following overall dimensions (in meters):
- Transport length – 12.
- Width – 3.34.
- Height – 3.64.
- Boom length – 7, handle – 3.4.
The weight of the equipment is 41.4 tons, the pressure on the ground is 0.79 kg/cc.
Komatsu pc 400 is equipment for quarry work; it can dig or fill trenches and make embankments. It is ideal for the mining, oil and gas industries, and metallurgy.
Hydraulic excavator Komatsu PC 400 - characteristics of this model
Characteristics of trapezoidal bucket:
- volume – 2.1 cubic meters. m;
- maximum digging height – 11 m;
- digging depth – 7.8 m;
- unloading height – 7 m;
- bucket movement radius – 11 m;
- maximum handle force - 26 kgf, bucket - 28.2 kgf.
It is even more stable than previous excavators. This is due to the introduction of an improved counterweight system into its equipment. Because of this, he gained another advantage - his carrying capacity became greater.
Engine characteristics:
- Power – 347 hp. With.
- Engine capacity – 11 liters.
- Rotation speed – 1850 rpm.
- Cylinder diameter – 125 mm.
Komatsu Excavator - Model PC 400
Model advantage
The advantage of this model is the new hydraulic system. It reduces hydraulic fluid losses during operation and further reduces fuel consumption. The essence of its design is a closed center and two pumps with variable flow.
Control is carried out electronically. Depending on the complexity of the work, fuel consumption is 18–28 l/hour. The fuel tank is designed for 650 liters.
The operator's hard work is brightened up by comfortable conditions inside the cabin. It is increased in size and provides a good overview of the working area. The back of the chair can be adjusted and even taken to a horizontal position. An increased level of noise insulation protects against extraneous sounds during platform rotation, bucket operation and other manipulations. Chair vibration is also reduced.
Dust does not enter the cabin - high-quality sealing and air conditioning with an air filter protect against this.
