Highly efficient and modern Komatsu bulldozers are used in various fields of industry and the national economy. The tractor has proven itself to be a reliable, easy-to-use and easy-to-operate unit. The machine is equipped with modern power devices and has several configurations. The equipment is designed for operation in various climatic regions.
Peculiarities
Komatsu bulldozers are manufactured by the world leader in the field of industrial transport equipment. All technical and auxiliary components combine ease of maintenance, while each of them is patented and made using high technology. The tractor is equipped with a fault detection system, which increases the speed of troubleshooting several times.
For the driver, the seat is equipped with various thoughtful elements and is protected from external influences, which allows you to comfortably work in various conditions. The bulldozer in question, created in the Land of the Rising Sun, has an increased service life thanks to the use of innovative solutions using composite materials. Variations in configuration allow you to choose a model that is optimally suited for certain types of work. The unit can be equipped with a baking powder, attachments and other additional equipment.
Modifications
Komatsu bulldozers, the model range of which includes special equipment of various categories, can handle loads from eight to hundreds of tons. In terms of power, modifications from 80 to 900 horsepower are presented. The most popular bulldozers on the domestic market are Komatsu d65.
They are multifunctional heavy-duty special equipment used for different types of bulldozer work. Track assistants can be equipped with various types of front blades with adjustable steering and tilt angles, as well as upgraded elements that significantly increase machine productivity.
In addition, the following modifications are in demand:
- D65E;
- D355A;
- D275;
- D375;
- D475.
They all have their own characteristics and areas of application.
Komatsu D575A - the largest bulldozer in the world
It is difficult to imagine modern construction or quarrying without a bulldozer. This universal human assistant can level a construction site, remove debris from it, help with coal mining from open pits, and simply trample down silo pits. The mechanism itself is not complicated in design, is unpretentious in operation, but is easy to operate.
The history of the bulldozer
The first bulldozer was created in 1904 by the American inventor Benjamin Holt, who named his brainchild a Caterpillar (crawler tractor). According to another version, the championship belongs to the engineers of the British company Hornsby, which then sold its patents for inventions to Holt.
Caterpillar - the first bulldozer in the world
Technologically, the main unit of a bulldozer is a shovel in the form of a blade. It was created much earlier. The bulldozer in its modern form was first created by specialists from La Plante-Choate, who were the first to think of combining a blade and a crawler tractor.
The appearance of the famous giant and its characteristics
As with any type of technology, among bulldozers there are dwarfs and strong giants. The largest of those actually used in work was the Japanese supergiant Komatsu D575A. The world was introduced to this tech giant more than 35 years ago when it was exhibited at the Japan branch of the 1981 Texas World Tech Expo.
Main technical indicators
Komatsu bulldozers, the basic technical characteristics of which are presented below, in the most popular configuration have the following indicators:
- The power of the power plant is 207 horsepower. (1550 W);
- Total weight with attachments – 19.7 tons;
- Track/track width – 1.88 /0.51 m;
- Ground clearance – 425 mm;
- Straight blade: width/height (mm) – 3415/1225;
- Rotary type equipment: width/height (mm) – 3970/1100;
- Hemispherical element (similar indicators) - 3870 and 1235 mm;
- The maximum lifting height of the bucket above ground level is 1100 mm;
- The maximum depth of immersion of the bucket into the soil is 505 mm;
- The loosening mechanism is a three-stage version with a maximum lift of up to 640 mm and a depth of 595 mm.
Komatsu D65E 12 bulldozers have: length – 6.6, width – 3.1, height – 3.46 meters.
Power plant and transmission unit
The tractor is equipped with a four-stroke diesel engine with direct fuel injection and water cooling. The unit revolutions per minute is 1950 rotations on the flywheel, the power is 135 kW with a fuel consumption of 180 g per hour. The installation is considered one of the most economical in its class, with maximum torque reaching 799 Nm at 1,100 rpm. The engine lubrication system is of a forced type; the reduced noise threshold allows the equipment to be used in urban environments.
Popular Komatsu bulldozers are equipped with the original TORQFLOW transmission. The unit is a hydraulic single-stage transformer with three elements. The planetary-type hydraulic gearbox is interconnected with a multi-disc clutch unit and has forced lubrication. The gearbox operates in three forward and the same number of reverse positions.
The gearbox on board the tractor is a configuration of planetary and spur gears, which minimizes the impact on the power unit. The bulldozer is controlled using a joystick. Elementary movements in the desired direction make it possible to easily and effectively control a multi-ton machine. This is due to the advantage of introducing hydraulic brakes and clutches into the design.
ENGINE
The Komatsu D355A is equipped with a Komatsu SA6D155-4A diesel engine, which represents one of the first generations of engines with an improved mechanism for using exhaust gases. Turbocharging allows you to increase power without increasing the volume of the cylinders. The design of the motor also assumes the presence of liquid cooling with a reverse fan and forced circulation and a special air cleaner. The unit is distinguished by its low noise level, which is achieved by enclosing the radiator, which removes sound.
Komatsu SA6D155-4 engine parameters:
- working volume – 19.26 l;
- operating power – 305.7 (410) kW (hp);
- rated speed – 2000 rpm;
- maximum torque – 1760 Nm;
- number of cylinders – 6;
- cylinder diameter – 155 mm.
The average fuel consumption for Komatsu D355A is 75-82 l/hour. A full tank lasts approximately 7-8 hours of operation.
Cabin arrangement
The operator's workplace is a cabin that has a comfortable chair, air conditioning, a ventilation system, a joystick for controlling the tractor, and other functional and control devices.
The work of the bulldozer operator is further facilitated by increased visibility, excellent shock absorption, as well as thoughtful protection from dust and noise. The cabin can be easily adjusted to the driver’s physical characteristics and can be produced in a reinforced version for work in particularly difficult conditions.
Control of dumps is carried out by adjusting speed and weight modes, which makes it possible to accurately work with various materials. A similar effect, which is expressed in smooth compensation of the mechanical impact of the processed product, is obtained thanks to the specially developed CLSS technology used in the manufacture of hydraulic units. Many levers, sensors and instruments help to correctly adjust the work, taking into account their indicators and features.
DEVICE
The Komatsu D275A-5 design is based on a supporting frame and a kingpin crawler. Modern swing-type suspension has a signature feature - K-shaped carriages swinging on 2 axes. The possibility of displacement helps to reduce shock loads, which increases the service life of the equipment. The suspension softens shocks transmitted to the structure, increasing operating comfort. The advantages characteristic of the previous chassis have been preserved in the new model. The clever design of the shoes ensures minimal slippage, allowing the bulldozer to move through wet ground and swampy areas. Rock shoes are available for equipment with unique dust seals to extend service life.
Chassis characteristics:
- number of road wheels (on each side) – 7;
- number of support rollers (on each side) – 2;
- number of shoes (on each side) – 39;
- lug height – 88 mm;
- shoe width (standard) – 610 mm;
- surface contact area – 4.25 sq.m;
- ground pressure – 118 kPa.
Climbing shoes are also available with the following options:
- width – 710/760 mm;
- additional weight – 570/850 kg;
- supporting area – 4.94/5.29 sq.m;
- ground pressure – 102/96 kPa.
The equipment is controlled using a TORQFLOW hydromechanical transmission with a single-stage single-phase torque converter and a planetary gearbox with a multi-plate clutch. The gearbox is complemented by a hydraulic drive and pressure lubrication. The locking lever and neutral switch prevent the dozer from moving unintentionally. A special feature of the Komatsu D275A-5 is the power train control system, which regulates the power sent to the transmission, brakes and final clutches, taking into account operating parameters. When the load weight increases and the speed drops, a lower gear is automatically engaged. This functionality increases the service life of the bulldozer and makes the move smoother.
Travel speeds:
- 1st gear – 0-3.8/0-4.9 km/h;
- 2nd gear – 0-6.7/0-8.7 km/h;
- 3rd gear – 0-11.2/0-14.9 km/h.
Hydraulic system parameters:
- type of hydraulic cylinders – piston with 2-way action;
- maximum flow – 230 l/min.
The bulldozer is equipped with a modernized cabin with 360-degree visibility and a comfortable chair with elastic suspension, complemented by a customizable armrest. Longitudinal adjustment allows you to adjust the optimal position for the operator. The level of noise and vibration in the cabin always remains minimal due to high-quality finishing materials and tightness.
Advantages of the technology in question
Komatsu bulldozers have a number of objective advantages, which include the following:
- Excellent power of power plants, which guarantee high performance of the unit.
- Good efficiency indicators and unpretentiousness.
- The introduction and use of motors, as well as other important components of our own manufacture, which increases their reliability and repairability.
- It is allowed to use various types of replaceable attachments, which expand the functionality and scope of use of the machine.
- High quality of main units and components, as well as additional equipment, ensuring reliability and long-term service life.
- The low center of gravity of the machine and the design features of the tracked chassis give the tractor reliable stability during the working process.
Reviews
Most reviews about Komatsu equipment are positive. Users especially note the advantages listed above, as well as driver comfort, variety of configurations, modern cabin design and ergonomics.
In addition, full operation and repair of this machine in domestic conditions can be organized thanks to open service centers, and the cost of the unit is quite acceptable for equipment of this category, since the production of spare parts and components has been established in Yaroslavl, the head office is located in Moscow.
Completion
We can safely say that Japanese Komatsu bulldozers, the overall dimensions of which depend on the modification and have a fairly wide range, are reliable and functional machines.
If a modern tractor is required for work in various industries, the choice of the unit in question is almost the optimal solution, taking into account performance, ergonomics, compliance with international standards, efficiency, quality of parts and the overall cost of this vehicle.
TOP5 - the largest bulldozers in the world
The technological world is developing rapidly. Every day a huge amount of technology is created to simplify our complex lives.
What if the directors’ fantasies are not so far from reality, and the “rebellion of the machines” is about to begin? Then these huge crushing machines, which will be discussed below, will erase everything from the surface of the earth in no time. You need to know the “monsters” by sight! Attention, here they are:
TOP 5 largest bulldozers
ChTZ T-800
The full name of this equipment is a super-heavy tractor for working as part of a bulldozer-loosening unit.
The machine has been produced at the Chelyabinsk Tractor Plant since 1983. Weight is 106 tons, power is 820 hp. With.
At the time of design, this bulldozer was the largest and most productive in the world and was even listed in the Guinness Book of Records. This unit was conceived for the development of soils where explosives are powerless. It was first used during the construction of the South Ural Nuclear Power Plant.
The Chelyabinsk bulldozer received its greatest value when used in diamond mining in Yakutia. Before the advent of the T-800, explosives were used, which not only destroyed the rock, but also damaged the diamonds themselves.
Before the collapse of the USSR, 10 units of equipment were produced. Today, the production of these Russian heroes has been suspended, although they are still included in the ChTZ production program, and the plant management can proudly say that it produces the largest bulldozer in Europe.
CATERPILLAR D11R CD.
The American company CATERPILLAR is the founder of tracked vehicles (the company name itself translates as “caterpillar”). At the moment, the D11R CD model is the largest bulldozer produced by this brand.
Such a machine weighs 104 tons, together with the loosening system - 112 tons. For clarity, the space shuttle weighs about the same.
The bulldozer has a power of 913 hp. With. and a fairly spacious dump of 27.2/43.6 m3.
KOMATSU D475A-5SD
This is the current flagship of the Japanese company Komatsu. Its proud prefix “Super Dozer” says: now we have reached serious equipment, everything else is for little ones.
The mass of this land crusher is 113.2 tons. The bulldozer is also equipped with a 12-cylinder turbodiesel engine with an output of 899 hp, which is capable of accelerating the giant up to 11 km/h forward and up to 14 km/h back. Such an engine requires 121 liters of oil; 275 liters are poured into the cooling system at a time. antifreeze. Yes, think about the modest appetites of your cars.
The Komatsu D475-5SD is currently the largest mass-produced bulldozer in the world.
