For questions regarding the purchase of this equipment (Komatsu D275A-5 crawler bulldozer), terms of credit and leasing, service and warranty, please contact the factory dealers or official representative offices. Delivery of Komatsu D275A-5 crawler bulldozer can be carried out either directly from the manufacturer or from sites in Moscow and other regions of the Russian Federation.
About mechanical engineering
The company was founded in 1921 as a small equipment repair shop in the city of Komatsu, on the west coast of Japan. In the 1930s, the company began producing its own agricultural crawler tractors; in the 40s - hydraulic presses and machines for leveling soil. The first bulldozer, called Komatsu D50, was released in 1947. The following year, the company launched production of its own diesel engines.
Since 1955, when the first export of motor graders to Argentina took place in the company's history, it has gradually but consistently expanded the geography of its presence in the special equipment market. Nowadays, the Komatsu Group includes 182 companies engaged in the production of special equipment and components for it. The largest operate in Japan, China and India.
In 2003, the company entered into billion-dollar contracts in Russia to service oil and gas production and transportation projects. In 2008-2010 it was built in Yaroslavl for the production of middle-class hydraulic excavators and heavy-duty mining dump trucks.
Komatsu CIS LLC, headquartered in Moscow, founded in February 2008, operates in nine former Soviet republics: Russia, Ukraine, Belarus, Kazakhstan, Turkmenistan, Uzbekistan, Tajikistan, Kyrgyzstan, Armenia.
Features of the Komatsu D275A-5 bulldozer
- Chassis with special carriages that provide stable traction with the ground surface.
- Hydraulic system provided with additional protection.
- A low center of gravity improves the stability of the special vehicle.
- Powerful yet economical diesel engine.
- Track links with modern advanced design.
- Seven-bearing rollers that increase the stability of the special vehicle.
- Ease of operation (with joystick and function buttons) and maintenance.
- Electronic modulating valve control system.
- A universal ripper, the angle of which can be adjusted.
- Large volume dumps.
Pros and cons of the D275A-5
A reliable bulldozer from the manufacturer has a lot of advantages:
- high stability due to the low center of gravity;
- high protection of hydraulic turbo lines;
- the presence of a K-shaped chassis;
- engine equipped with all necessary accessories;
- accessible maintenance;
- adjusted track link design;
- single-shank ripper;
- smooth turn.
No disadvantages of this unit have yet been identified. This doesn't mean they don't exist. Experienced drivers note the following disadvantages:
- The design of the ripper is not entirely accurate; it does not bend the fang under itself enough;
- low quality rubber goods;
- illogical headlight position;
- weak grille, lower armor, sloth covers.
These disadvantages do not have exact confirmation, but they are talked about.
Bulldozer engine
Komatsu D275A-5 is equipped with a power unit of the company’s own production. The four-stroke six-cylinder diesel engine Komatsu SDA6D140E is equipped with turbocharging, charge air cooling and direct injection of diesel fuel. It is mounted on the tractor frame using thick rubber cushions, which significantly reduces vibration and noise.
For its power level, the SDA6D140E engine is characterized by good efficiency. Diesel fuel consumption is 55-60 liters per hour of bulldozer operation. Taking into account the fuel tank capacity of 840 liters, a full refueling of the Komatsu D275A-5 bulldozer is enough for 15-18 hours of operation.
Working volume – 15.24 liters. Power - 306 kW (410 hp), at a speed of 2000 rpm. Cylinder diameter – 140 mm, piston stroke – 165 mm.
The engine speed controller is all-mode, electronic. The lubrication system is forced, from a gear pump. The filter is full flow. Liquid cooling system. For better effect, a cooling system fan equipped with a hydraulic drive is provided. Its operating frequency is adjusted automatically, taking into account the temperatures of the system’s working fluid and coolant.
Prices
A bulldozer has always been expensive. This even applies to used models. For example, models from 2005-2006 cost 10,000,000-12,000,000 rubles, 2007-2008 – 13,000,0000-15,500,000 rubles, 2010-2011 – 17,500,000-22,000,000 rubles. The difference in price categories is explained by different equipment, levels of wear and operating hours.
The option of renting a car is also being considered. The rental price is 3,000 rubles per hour, which means that an 8-hour shift will cost 24,000 rubles. The rental price depends on the region and the condition of the car.
Hydromechanical transmission and final drives
The hydromechanical transmission is also of our own production, under the Torqflow brand. It is used on a number of models of equipment and consists of: a three-element single-stage, single-phase torque converter with liquid cooling and a planetary gearbox with a multi-plate clutch.
The gearbox is equipped with a hydraulic drive. Its lubrication is carried out under pressure, ensuring optimal heat transfer. To prevent accidental movement of the special vehicle, a gear shift lock lever and a neutral position lock switch are designed.
Final drives with double speed reduction, spur gears and planetary gears increase traction force and reduce mechanical stress on gear teeth, extending the service life of final drives. The multi-section drive wheels are bolted on and can be replaced in the field.
A special power transmission control system records the operator’s actions and the operating parameters of the special vehicle. Based on this information received, the system regulates the power transmitted to the brakes, final clutches and transmission. As the load increases and the speed decreases, it automatically selects a lower gear. This makes the work process smoother and generally helps to extend the life of the machine. By the way, this function can be deactivated by simply pressing the cancel button.
The Komatsu D275A-5 bulldozer is also equipped with an automatic gear shift switch. The special vehicle has two schemes: for light and heavy loads). The switch simplifies the execution of similar actions that require returning to the starting position.
Maintenance
To make regular maintenance of the 50 ton Komatsu D275A-5 bulldozer faster and more convenient, the main service points have been grouped. We are talking, in particular, about the power transmission oil filter, hydraulic tank and dipsticks designed to check the oil level - they are all located on the right side of the housing. Maintenance is also made easier by the fact that a modular principle is used in the design of power transmission components. The engine compartment has become larger.
Disc brakes are maintenance-free. The hydraulic system pipelines are reliably protected from damage.
During operation of the komatsu d275a 5 bulldozer, data on engine speed and gear engaged is displayed on the monitor. In the event of emergency situations, the operator’s attention will be drawn to this using an alarm lamp and an audible signal.
Chassis Komatsu D275A-5
The bulldozer has an exceptionally strong supporting frame and a crawler carriage with a kingpin and a balancer beam, which increases the overall reliability of the entire structure. This special equipment uses a swing type suspension. Its key feature is the presence of K-shaped carriages. This provides the following important advantages:
- precise control of the alignment of the road wheels and the caterpillar track, ensuring an increase in the service life of the entire chassis;
- reduction of shock loads on chassis elements;
- the carriages swing on 2 axes. The vertical displacement of the track increases, which helps reduce shock loads on the undercarriage elements and increase the durability of the components;
- Operator comfort is improved by reducing shock and vibration loads when moving over difficult terrain.
The lubricated track rollers are elastically mounted on the crawler undercarriage using a series of uniquely designed cross-shaped carriages, the oscillatory movements of which are absorbed by rubber cushions.
The low drive position, traditional for the company’s special equipment, and the long caterpillar track with a large supporting surface maintain consistently good stability and cross-country ability of the bulldozer. Shoe slippage remains minimal and force levels on the ripper and blade remain stable.
There are 39 shoes installed on each side of the bulldozer, with a base width of 610 mm. There are 7 rollers on each side. The height of the single lug is 88 mm. The idler wheel will not wobble under loads, which ensures the machine is balanced.
The tracks have lubricated joints sealed with dust seals. They prevent foreign abrasive materials from entering the gaps between the pin and bushing, extending the active life of the tracks. Tensioning and adjusting the tracks is easy with a grease gun.
The supporting area is 42,456 cm2. Specific pressure on the ground (bulldozer blade) – 118 kPa (1.20 kgf/cm2).
Hydraulic system
The capacity of the hydraulic system (blade) is 130 liters, (ripper) - 38 liters; maximum flow – 230 liters per minute. Hydraulic cylinders (2 pcs.) – piston, double-acting. The closed-center, load-sensing system is designed to provide precise, fast control and efficiently run parallel jobs.
All control spool valves are mounted externally, next to the hydraulic tank. The plunger hydraulic pump is capable of delivering up to two hundred and thirty liters per minute, at a nominal engine speed of 2000 rpm.
Working equipment
The capacity of Komatsu D275A-5 bulldozer blades is 13.7 m3 (hemispherical), or 16.6 m3 (spherical). This guarantees consistently high performance of the special vehicle. The front sheet and side cheeks of bulldozer blades are made of high-strength steel. A double skew blade is available upon request.
Maximum blade depth – 640 mm; maximum lift – 1450 mm.
A single-shank ripper with an adjustable ripping angle is installed at a significant distance from the axis of the drive wheel, and this simplifies the use and increases the efficiency of the ripper, while maintaining a powerful ripping force. The ripping angle of the single-shank, single-shank ripper is adjustable. The lever mechanism is parallelogram. This is an ideal tool for loosening hard rocks and soils.
The multi-shank ripper has three shanks and a parallelogram hydraulic linkage mechanism. Ripper lifting height – 955 mm; maximum loosening depth is 900 mm.
Conclusion
Komatsu D275A-5 cars are modern models. They are distinguished by sufficient equipment, eye-catching appearance, operational efficiency and a wide range of applications. With standard equipment, the car has everything you need for comfort:
- driver's seat on suspension, trimmed with eco leather;
- lighting system with headlights;
- hydraulic track tensioners;
- automatic engine warm-up system;
- color display;
- rear view mirrors and much more.
The Japanese showed how equipment should work, and this is a kind of challenge to other manufacturers. There are no complaints about the bulldozer, even maintenance is not a hassle. There is also no need to get spare parts. They are in the public domain and can be found.
Bulldozer cabin
Bearing in mind that creating comfortable working conditions for the operator ultimately increases productivity and has a positive impact on safety, the D275A-5 bulldozers are equipped with a low-noise cab or a sealed cab (this is an additional option). In any version, the special vehicle cabin has damping elements and large tinted glass windows, providing excellent visibility in all sectors. Damper springs isolate the cabin from the supporting frame of the special vehicle, providing decent operating comfort and smooth running of the tractor.
The D275A-5 bulldozer uses a new elastic suspension seat. It provides excellent support for the back and arms, and has the ability to move longitudinally. To improve visibility in the rear sector, when reversing, the operator has the ability to turn the seat to the right at an angle of up to 15°. At the same time, the gearbox and steering controls move with the seat, which ensures maximum operator comfort. The motion control console can also be moved forward and backward and adjusted in height. The height of the armrest is separately adjustable, so the operator can operate the machine without changing the most comfortable position.
Komatsu has been creating and improving the Human-Machine Interface, an ergonomically sound control system, for many years now. The joystick of the electronic motion control system of the special vehicle helps the operator precisely control its maneuvers, while being in a fairly comfortable position and without exerting significant effort.
Modifications
Kamatsu bulldozers are needed to solve problems in a variety of climatic and terrain conditions. The machines can be wheeled or crawler-mounted; there are also swamp vehicles and amphibious bulldozers. They can work in difficult conditions.
For the first time, a Japanese company produced a tracked vehicle in the late 40s of the 20th century.
In the 21st century, these are cars with a power range from 85 to 899 hp. With. There are models of the largest bulldozers from Kamatsu; there is no competition in size in the whole world. The Japanese bypassed everyone.
Here are the modifications of the bulldozer: D275A-2, D275A-5.
The distinctive feature of the model is its maximum versatility of use and comfort (we are talking about the driver). Plus, an economical and environmentally friendly engine is an important point. These qualities will distinguish the original car from other modifications.
Some technical specifications in numbers
- The mass of the bulldozer (fully fueled) is 37,680 kg.
- The mass of the bulldozer (with a hemispherical blade and a single-tooth ripper) is 50,850 kg.
- length – 9290 mm;
- width – 4300 mm;
- height – 3985 mm;
- track base – 3480 mm;
- minimum turning radius – 3900 mm;
- ground clearance - 507 mm;
- front track – 2260 mm;
- rear track – 2260 mm;
- track width – 610, 710, 760 mm;
- The volume of the fuel tank is 840 liters.
- The volume of the engine cooling system is 130 liters.
- The volume of the engine lubrication system is 52 liters.
- Hydromechanical transmission, main gear and side clutches - 90 liters.
- Final drive housing (each side) – 40 liters.
Reviews of Komatsu D275A-5 bulldozers
Komatsu D275A-5 bulldozers receive extremely positive reviews from owners and operators. This is truly reliable and high-performance technology. But, of course, it is important to know how to handle it. The engine starts well even in the most severe frosts. Over time, of course, the years take their toll, and the equipment wears out, but all breakdowns occur mainly due to “little things.”
Used D275A-5s sometimes perform poorly while the engine and transmission are still warm, but as the temperature rises, everything returns to normal. According to reviews, the cabin is really comfortable, which allows you to work for a long time without feeling tired.
DESCRIPTION AND PURPOSE
Komatsu D275A-5 is a 35 traction class crawler bulldozer (weighing more than 50 tons). The high quality of the machine is due to the fact that the most important elements and parts (frame, transmission, motor, hydraulic system) are developed and produced by the manufacturer independently. The model works effectively in the harshest conditions and can withstand temperatures from -50 to +40 degrees. The equipment is positioned as a reliable, productive and safe assistant for medium and large companies.
The Komatsu D275A-5 bulldozer is a universal machine and is used for a wide range of work in the oil and gas industry, road construction and other areas. The model copes well with layer-by-layer development and movement of soil, leveling work and loosening of rocks and frozen soils. The technique is also used to clear areas of bushes and stumps, fill quarries and holes, and build dams and dams. Large dimensions make the Komatsu D275A-5 especially effective when performing large volumes of work.
