D 275 specifications. Low maintenance costs

18.10.2021

Bulldozer KOMATSU D275A-5

Engine of the bulldozer KOMATSU D275A-5

This economical engine, coupled with the heavy weight of the machine itself, makes the D275A-5 a premium crawler-mounted tool for loosening hard rock and. This engine is designed to provide a lower emission level than is required by the environmental standard. The engine of the KOMATSU D275A-5 bulldozer is equipped with direct fuel injection, turbocharging and charge air cooling systems, which maximizes fuel economy.

Blade of large capacity

With a dozer blade capacity of 13.7 m3 (hemispherical) and 16.6 m3 (spherical), the KOMATSU D275A-5 delivers outstanding performance. The blade front and side cheeks are made of high-strength steel for increased structural strength.

The use of a double tilt blade (optional) increases productivity with less effort by the operator:

1. Optimal blade angle for all material types and grades of any grade can be selected on the fly, increasing blade load and machine productivity.

2. Operations including digging, dozing (moving load) and unloading (leveling) are easy and smooth, reducing operator fatigue.

3. The tilt angle of the blade and the speed of its installation are twice the same parameters of the blade with a single tilt.

Comfortable working conditions for the operator

1. Newly designed pressurized cab(installed by order).
- The newly designed cab and large tinted glass windows provide excellent visibility in the front, side and rear sectors.
- Using air filters and creating overpressure inside the cab

2. New cab with damping element and K-Bogie Undercarriage for increased operator comfort while the machine is on the move. The suspension of the cab of the KOMATSU D275A-5 bulldozer uses a new design damping elements that effectively absorb shock loads and vibration due to the considerable length of their working stroke. Cab damping assemblies and a new K-bar undercarriage mitigate shock and vibration when the machine is driven over uneven terrain, which is not possible with a conventional cab suspension system. A soft spring damper isolates the cab from the machine base frame, absorbing vibration for a smooth ride and a comfortable operating environment.

3. New chair with elastic suspension. The KOMATSU D275A-5 bulldozer uses a new elastic suspension seat design. The guides for the longitudinal movement of the chair and the spring of the modified design have increased strength and rigidity, which reduces the free movement of the components of the chair. The new seat provides excellent back and arm support to keep the operator comfortable while the machine is in motion. The longitudinal movement of the chair allows you to adjust its position depending on the height of the operator.

Standard equipment of the KOMATSU D275A-5 bulldozer

1. Alternator, 75 A / 24 V
2. Reverse signal
3. Rechargeable batteries - 2 x 12 V, 170 A.h
4. Blower fan
5. Decelerator pedal
6. Dry type air cleaner with dust extractor and clogging indicator
7. Anti-wear guard for final drive housing
8. Hinged front safety guard
9. Hinged under guard with front pulling hook
10. Hydraulic track tensioners
11. Lighting system (including two front, two rear lights)
12. Muffler with rain cover
13. Control system of movement of the effort of the wrist
14. Expansion tank of the cooling system
15. Mounting posts for ROPS structure
16. Multi-section driving wheels
17. Crawler units with seven road wheels
18. 610 mm (24 in.) Single grouser rock shoes
19. Starter, 11 kW / 24 V
20. Seat with elastic suspension, upholstered in synthetic leather
21. Hydromechanical transmission TORQFLOW
22. Torque converter
23. Protection of road rollers
24. Sound signal
25. Wet side clutches / brakes

Equipment of the bulldozer KOMATSU D275A-5, supplied by order

1. Air conditioner with heater and defroster
2. Alternator, 90 A / 24 V
3. Car stereo system
4. Counterweight
5. Dozer blade of double tilt
6. Fire extinguisher
7. Coupling device
8. Hydraulic system for ripper control
9. Headlight for illumination of a ripper
10. Rearview mirror
11. Panel cover
12. Perforated side covers
13. Perforated single protective grille
14. Pusher plate
15. Seat belt
16. Shoes
17. Hemispherical dozer blade visor for material retention
18. Blade for spherical dozer blade for material retention
19. Reinforced hemispherical blade
20. Reinforced universal blade
21. Shoes slip control system

Specifications bulldozer Komatsu D275A-5
Bulldozer weight, kg	37680
Operational weight, kg	50850
Minimum turning radius, mm	3900
Komatsu D275A-5 bulldozer engine
Model	Komatsu SDA6D140E
Type of	four-stroke, liquid-cooled, direct fuel injection
Suction type	turbocharged and charge air cooled
Flywheel power at 2000 rpm, h.p.	410
Number of cylinders	6
Piston diameter, mm	140
Piston stroke, mm	165
Working volume, l	15.24
Refueling tanks of the Komatsu D275A-5 bulldozer
Fuel tank, l	840
Engine cooling system, l	130
Engine lubrication system, l	52
Hydromechanical transmission, l	90
Final drive housing (on each side), l	40
Hydraulic system of the Komatsu D275A-5 bulldozer
Maximum flow, l / min	230
Safety valve setting, MPa	27.5
Hydraulic cylinders	piston, double-acting
Bulldozer control hydraulic system capacity
Hemispherical dozer blade control with variable skew angle, l	130
Controlling a spherical bulldozer blade with a variable skew angle, l	130
Ripper equipment control (additional volume)
Single-shank ripper control, l	38
Multi-shank ripper control, l	38
Undercarriage of the Komatsu D275A-5 bulldozer
Suspension	swinging type, with balance bar and king pin
Track roller frame	cylindrical, made of high-strength steel
Rollers and idlers	lubricated track rollers
Number of shoes (each side)	39
Single lug height, mm	88
Shoe width (standard), mm	610
Support area, cm 2	42456
Number of track rollers (each side)	7
Number of carrier rollers (each side)	2
Specific ground pressure, KPa (kgf / cm 2)	118 (1.20)

For purchase of this equipment (Komatsu D275A-5 crawler bulldozer), terms of credit and leasing, service and warranty service, please contact the dealers of the plant or official representative offices. Delivery can be carried out both directly from the manufacturer, and from sites in Moscow and other regions of the Russian Federation.

Specifications Komatsu D275A-5

Performance characteristics
Weight *, kg		45370
Dimensions (edit)
Overall length, mm		6930
Overall width, mm		4300
Overall height, mm		3965
Ground pressure, kg / cm 2		1,06
Bulldozer equipment
Blade type		semi-U blade with one side adjustable tilt
Weight (including valve body), kg		7507
Length, mm		4300
Height, mm		1960
Maximum lifting height of the blade, mm		1450
Maximum depth of the dump into the ground, mm		640
Maximum adjustment range of skew angles, mm		1000
Dump capacity, m 3	LH	16,5
	SAE	13,7
Manufacturer
Manufacturer		Komatsu

* - Includes bulldozer equipment weight and tractor weight without ROPS and cab.

General info for Komatsu D275A-5

Developed by the firm Komatsu design, provides maximum performance, reliability and versatility. Hydraulic system, power train, frame and other large assemblies are also designed Komatsu

Built on technology and experience gained Komatsu since its inception in 1921, a powerful new machine GALEO is a kind of gift to the company's customers in different parts of the world, embodying the original design, technical innovation and extremely valuable qualities.

Cars GALEO will be used to complete the fleet of modern construction and quarry machines of the company Komatsu... The creation of machines from this park, in the design of which high productivity, operational safety, and also issues related to environmental protection, are taken into account, reflects the company's aspiration Komatsu to create a more perfect world.

Practical steps to protect land and the environment

Komatsu-designed design, provides maximum performance, reliability and versatility. Hydraulic system, power train, frame and other large assemblies are also designed Komatsu... You are purchasing a machine whose components and assemblies are designed to work well together, providing higher productivity, reliability and versatility.

Using the cooling fan Hydraulically powered, self-driving engine reduces fuel consumption and noise levels while the machine is running.

Exceptionally low machine profile provides excellent stability and a low center of gravity.

Preventive maintenance

Grouped service nodes
Damage-protected hydraulic lines
Modular power train design
Conveniently located oil pressure test points

Simple supporting frame and a crawler track unit with a king pin increase the reliability of the machine.

Significant dump capacity: 13.7 m 3(17.9 cubic yards) hemispherical and 16.6 m 3(21.7 cubic yards) spherical.

The track link height and width are increased for increased durability.

New cab:

Has a spacious interior
Provides driving comfort with new damping and K-block undercarriage
Provides excellent visibility
Can be equipped (on request) with a high performance air conditioning system
Equipped with PCCS system lever
Can be equipped (on request) with a system for creating an overpressure inside the cabin
Equipped with a chair with an adjustable armrest
Equipped with a control unit built into the operator's seat

Turbocharged and cooled engine charge air develops a high power, constituting 306 kWt(410 hp).

Electronic modulating valve Provides smooth operation of the side clutches / brakes, making it easier to turn the machine.

Low drive undercarriage with long tracks and seven track rollers (on each side) provides excellent stability and excellent climbing ability.

Undercarriage equipped with K-shaped carriages, improves traction, extends component life and improves operator comfort.

Rippers (optional)

Single shank with adjustable ripping angle
Multi-post

The unique system of the firm's linkage Komatsu provides excellent performance.

PCCS (PССS Control System)

Firm Komatsu develops an ergonomically based PCCS control system that provides a fully operator controlled work environment.

Human-machine interface

Joystick for electronic vehicle motion control

The electronic motion control joystick allows the operator to precisely control the maneuvers of the machine from a comfortable position with little effort. Gear shifting is carried out by simply pressing buttons.

Left stick

Fully adjustable resilient suspension seat and motion control console

To improve visibility in the rear sector when reversing, the operator can rotate the seat to the right by an angle of up to 15 °. Transmission and steering controls move with the seat for maximum operator comfort. The drive console can also move forward and backward and adjust in height. The armrest height is individually adjustable, allowing the operator to operate the machine from a comfortable position.

Front facing operator

Operator position when turning the chair 15 °

Fuel feed knob

Engine speed is controlled by an electrical signal for ease of operation and eliminates the need for maintenance on linkages and fuel connections.

Proportional pressure control blade joystick

The blade is controlled by a proportional pressure valve and blade control joystick similar to the drive joystick. The use of a control system with proportional pressure regulation in conjunction with a highly reliable hydraulic system of the company Komatsu Provides precise blade control. (The bi-plane skew and blade tilt are set by lightly pressing the pushbutton switch. This control box is only used when installing a double tilt blade.)

Height-adjustable armrest with blade control console

The armrest with blade control is adjustable in three height ranges to provide the operator with a secure elbow rest.

Blade and ripper joystick

Adjustable Ripper Lever Position

The position of the ripper control lever is adjustable to allow the operator to select the most comfortable position for any ripper operation.

Diagram of the electronic control system Komatsu D275A-5

Komatsu D275A-5 Electronic Drive Train Control System

Smooth operation

On a bulldozer D275A-5 a new electronic powertrain control system is used. The controller registers the operator's control action (the amount of movement of the lever or the duration of pressing the button switch), as well as the signals coming from each sensor and characterizing the state of the system it controls, and accurately calculates the executive impulse that controls the gearbox, side clutches and brakes, ensuring the operation of the machine in optimal mode. These new features of the control system have greatly simplified operation. new bulldozer D275A-5 and its productivity has increased dramatically.

Transmission control by electronically controlled modulating valve

The controller automatically matches each clutch engagement to driving conditions such as engaged gear, engine speed, and gear shift pattern. This ensures smooth bumpless clutch engagement, improves reliability and extends component life, and creates a more comfortable working environment for the operator.

Controlled clutches / brakes with an electronically controlled modulating valve

Sensors monitor machine systems and electronically control clutches and brakes based on job parameters such as bulldozing weight, slope or load, making the job smoother and easier by reducing the need for corrections direction by moving the swing arm in a direction opposite to the deflection of the machine when driving downhill, and the like.

Efficient control of side clutches / brakes with electronically controlled modulating valve

When bulldozing and turning, an electronically controlled modulating valve automatically adjusts the amount of clutch and brake disc openings to match the load, allowing smooth dozing and turning of the machine.

When dozing downhill, the electronically controlled modulating valve automatically controls the clutches based on machine tilt angle or load, reducing directional adjustments (by moving the swing arm in the opposite direction to machine deflection) and providing smooth dozing.

Pre-programmed gear shift switch

A pre-programmed shift pattern switch is included as standard, allowing the operator to select one of three pre-programmed patterns: F1 - R2 (1st gear forward - 2nd gear reverse), F2 - R2 (2nd gear forward - 2- reverse gear) or manual shift mode. When the F1 - R2 or F2 - R2 programmed pattern is selected, the drive control lever moves from the forward position to the reverse position, and the machine automatically moves forward / reverse, respectively, in first / second or second / second gears. This feature shortens gear change times in repetitive homing operations.

Automatic downshift function

The controller monitors the engine speed, the gear engaged, and the driving speed. When a load is applied and the vehicle speed is reduced, the controller automatically downshifts, optimizing the vehicle speed and ensuring high fuel efficiency. By eliminating the need for manual gear shifting, this feature improves operator comfort and productivity. (This function can be deactivated by pressing the cancel button.)

Characteristics affecting performance

Komatsu D275 engine

SDA6D140E engine company Komatsu develops a power of 306 kW (410 hp) at an engine speed of 2000 min -1. This economical engine, combined with the large mass of the machine itself, makes bulldozer D275A-5 A premium crawler-mounted tool for loosening hard rock and bulldozing. This engine is designed to provide a lower emission level than is required by the environmental standard. The engine is equipped with direct fuel injection, turbocharging and charge air cooling systems to maximize fuel efficiency.

The engine is mounted to the main frame with rubber mounts, which reduces noise and vibration.

Hydraulically driven engine cooling fan

The blower fan speed is automatically adjusted according to the temperature of the coolant and hydraulic fluid, which ensures low fuel consumption and high performance with low noise levels.

Undercarriage Komatsu D275A

K-block system

The new K-block undercarriage retains the benefits of the previous design while adding new ones.

Undercarriage characteristics of the previous design:

The tracks have sufficient bearing surface. Shoe slippage is minimized for reliable traction.
The idler wheel does not swing under load, which ensures the balance of the machine. Blade and ripper force remains stable for increased productivity.

New properties of the K-block undercarriage:

The K carriages swing on two axles and the vertical offset of the track has increased significantly. Impact loads on all undercarriage components have been reduced and component life has increased due to the continuous contact of the track rollers with the track.
The durability of the undercarriage has been increased due to improved control of track-to-track roller alignment.
Improved operator comfort while driving by reducing vibration and cushioning shock when traveling over uneven terrain.

Blade of large capacity

Dozer blade capacities of 13.7m3 or 17.9 cubic yards (hemispherical) and 16.6 cubic meters or 21.7 cubic yards (spherical) provide excellent machine performance. The blade front and side cheeks are made of high-strength steel for increased structural strength.

Double tilt blade (optional)

The use of a double tilt blade increases productivity with less operator effort.

The optimum blade angle for all material types and grades of any grade can be selected on the fly, increasing blade load and machine productivity.
Operations including digging, dozing (moving load) and unloading (leveling) are easy and smooth, reducing operator fatigue.
The blade tilt angle and setting speed are twice the same parameters of the single tilt blade.

Rippers

A single-shank ripper with an adjustable ripping angle is positioned well away from the drive wheel axle, making the ripper easier to use and more efficient while maintaining strong ripping force.
Single Shank Variable Angle Ripper, a single shank parallelogram-link ripper, is ideal for loosening tough rock. The ripping angle is variable and the ripping depth is adjustable in three ranges using a hydraulic pin.
The multi-shank ripper is a three-shank ripper with a hydraulic parallelogram linkage.

Operator's Station Komatsu D275A-5

Comfortable working environment for the operator

Creation of comfortable working conditions for the operator is a guarantee of safety and high productivity of the operator. Bulldozer D275A-5 equipped with a low-noise cab, which creates a comfortable working environment for the operator, allowing him to focus on the work.

Newly designed pressurized cab(installed on request)

The newly designed cab and large tinted glass windows provide excellent visibility to the front, side and rear sectors.
Air filters and pressurization inside the cab prevent dust from entering the cab.

New damping cab and K-bogie undercarriage improve operator comfort while on the move

In the cab suspension bulldozer D275A-5 damping elements of a new design are used, which effectively absorb shock loads and vibration due to the considerable length of their working stroke. Cab damping assemblies and a new K-bar undercarriage mitigate shock and vibration when the machine is driven over uneven terrain, which is not possible with a conventional cab suspension system. A soft spring damper isolates the cab from the machine base frame, absorbing vibration for a smooth ride and a comfortable operating environment.

Cab suspension damping unit

New chair with elastic suspension

On a bulldozer D275A-5 a new design of the chair with elastic suspension is used. The guides for the longitudinal movement of the chair and the spring of the modified design have increased strength and rigidity, which reduces the free movement of the components of the chair. The new seat provides excellent back and arm support to keep the operator comfortable while the machine is in motion. The longitudinal movement of the chair allows you to adjust its position depending on the height of the operator.

Serviceability of Komatsu D275A-5 Bulldozer

Performing preventive maintenance is the only sure way to ensure the longevity of your equipment. With this in mind, in bulldozer designs D275A-5 developed by the company Komatsu, the service points are conveniently located so that the necessary checks and maintenance operations can be carried out quickly and easily.

Grouped service points

For ease of service, the power train oil filter, power train oil dipsticks, and hydraulic tank are located on the right side of the machine.

All hazard warning and indicator lights on the monitoring panel are on for better photographic clarity

Self-diagnosis monitor

When the key is in the ON position, the monitor displays a "P" and a pre-start check and safety warnings appear in the lower right corner of the panel. When abnormal conditions are detected, the alarm lamp comes on and an audible warning signal sounds. While the machine is running, engine speed and forward / reverse gear are displayed in the right corner of the monitor screen. In the event of abnormal conditions during operation, the user code and the hour meter are displayed alternately. When an important user code appears on the screen, the alarm lamp flashes and an audible alarm sounds to warn of a malfunction, helping to avoid serious failures.

Hydraulic pipelines protection

Blade tilt cylinder hoses are fully mounted in the push bar to protect them from damage from material being moved.

Modular design of power train components

Modular power train components are sealed for removal and installation without oil spillage.

Test points for checking oil pressure

Power train oil pressure test points are grouped for quick and easy diagnostics.

Maintenance-free disc brakes

Wet disc brakes require less maintenance.

More spacious engine compartment

The volume of the engine compartment has increased due to the higher installation of the hood, which makes it easier to service the engine and accessories.

Upward-opening engine side doors(installed on request)

For easy access to the engine, side doors of a new design are made, which makes it easier to service the engine and replace the filter. Old design side doors have been replaced with thick, monolithic sheets with bolt-on latches for added strength.

Low maintenance costs

New track link design

On a bulldozer D275A-5 Greater width and height of track links and improved track guides are used. This increases undercarriage life and reduces maintenance costs by reducing the labor (man-hours) required to install the pins and bushings.

Dimensions Komatsu D275A-5

(With hemispherical blade and single shank ripper)

Ground clearance - 507 mm (1 ft and 8 in)

Design features of Komatsu D275A-5

Excellent stability and low center of gravity due to extremely low machine profile
Turbocharged and cooled engine
Preventive maintenance
Simple frame design improves machine reliability
New track link design
New spacious cab
Low drive undercarriage with long tracks and seven track rollers on each side
K-block system for improved traction
Rippers (optional)

The Komatsu D275A-5 is a heavy crawler bulldozer with an operating weight of 50.85 tons and a gross power of 306 kW (417 hp). It is capable of highly productive work in the harshest climates. The technique is universal, designed for a wide range of work in industry, road and general and other sectors of the economy. In a short time, he moves large volumes of cargo, removes soil, clears stumps and bushes, levels surfaces, profiles roads and earth embankments, backfills trenches, etc. The model is positioned as combining a modern and safe design, high reliability and significant technical and operational indicators.

Despite the expensive cost, the Komatsu D275A-5 model has been one of the most famous in the manufacturer's lineup and in demand on the market for many years. Komatsu bulldozers (and excavators too) have a long and illustrious history of operation in the Soviet Union and Russia. The company's activities in the USSR began with the supply of construction equipment to our country back in 1969, and this cooperation has never been interrupted.

During this long time, Komatsu equipment, which has been widely used in oil and gas production, in the construction of oil and gas pipelines, in oil, the forestry industry, has established itself as reliable, high-quality and durable. Komatsu notes that the rich experience of using its equipment in the harsh conditions of Siberia and the Far North has played an important role in improving the brand's excavators and bulldozers, bringing them to higher levels of technical development.

The firm was founded in 1921 as a small machine repair shop in Komatsu, on the west coast of Japan. In the 1930s, the company began producing its own agricultural tracked tractors; in the 40s - hydraulic presses and ground leveling machines. The first bulldozer, called the Komatsu D50, was produced in 1947. The following year, the company launched production of its own diesel engines.

Since 1955, when the first export delivery of motor graders to Argentina took place, Komatsu has been gradually but consistently expanding 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 Komatsu factories operate in Japan, China and India.

In 2003, the company signed billion-dollar contracts in Russia for servicing oil and gas production and transportation projects. In 2008-2010, the Komatsu plant was built in Yaroslavl for the production of medium-class hydraulic excavators and heavy-duty 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.

Komatsu D275A-5 is equipped with a power unit of its own production. The four-stroke six-cylinder Komatsu SDA6D140E diesel engine is equipped with turbocharging, charge air cooling and direct injection of diesel fuel. It is mounted on the tractor frame with thick rubber pads, which significantly reduces vibration and noise.

For its power level, the SDA6D140E engine has good economy. Diesel fuel consumption is 55-60 liters per hour of bulldozer operation. Taking into account the capacity of the fuel tank of 840 liters, a full refueling of the Komatsu D275A-5 bulldozer is enough for 15-18 hours of operation.

The working volume is 15.24 liters.
Power - 306 kW (410 hp), at a speed of 2000 rpm.
The cylinder diameter is 140 mm, the piston stroke is 165 mm.

Engine speed controller - all-mode, electronic. The lubrication system is forced, from a gear pump. The filter is full-flow. The cooling system is liquid. For the best effect, a hydraulically driven cooling fan is provided. The frequency of its operation is automatically regulated, taking into account the temperatures of the working fluid of the system and the coolant.

The hydromechanical transmission is also of its own production, under the Torqflow trademark. It is used on a variety of Komatsu vehicles and consists of a three-element, single-stage, liquid-cooled, single-phase torque converter and a planetary gearbox with a multi-plate clutch.

The gearbox is equipped with a hydraulic drive. It is lubricated under pressure to ensure optimum heat dissipation. To prevent accidental movement of the special vehicle, the gear shift lock lever and the neutral position lock switch are designed.

Final drives with double speed reduction, with spur and planetary gears increase tractive effort and reduce mechanical stress on the gear teeth, prolong the life of final drives. The multi-section drive wheels are bolted and can be replaced in the field.

A special power train control system records the operator's actions and the operating parameters of the special vehicle. Based on this information received, the system adjusts the power transmitted to the brakes, clutches and gearbox. When the weight of the load increases and the speed decreases, it automatically selects a lower gear. This makes the operating process smoother and generally helps to extend the life of the machine. By the way, this function can also 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 the same type of actions that require a return to the initial position.

The bulldozer has an extremely robust base frame and track unit with a king pin and balance bar, which increases the overall reliability of the entire structure. Oscillating suspension is used for this special equipment. Its key feature is the presence of K-shaped carriages. This provides the following important advantages:

precise control of the alignment of road wheels and caterpillar tracks, which ensures an increase in the service life of the entire chassis;
reduction of shock loads on chassis elements;
carriages swing on 2 axes. Vertical track offset is increased to reduce shock loads on the undercarriage and increase component durability;
Operator comfort is improved by mitigating shock and vibration when navigating difficult terrain.

The lubricated track rollers are resiliently mounted on the track bogie using a series of uniquely designed cruciform carriages, the vibrational movements of which are absorbed by rubber pads.

The low drive arrangement, which is traditional for the company's special equipment, and a long caterpillar track with an extensive support surface maintain consistently good stability and passability of the bulldozer. Shoe slip is kept to a minimum and the force on the ripper and blade is stable.

On each side of the bulldozer, 39 shoes are installed, with a base width of 610 mm. There are 7 rollers on each side. The single lug height is 88 mm. The idler wheel does not sway under the influence of loads, which ensures the balance of the machine.

The tracks have lubricated joints covered with dust seals. They prevent foreign abrasive material from entering pin-to-bushing clearances, extending track life. Tensioning and adjusting the tracks is easy with a grease gun.

The support area is 42,456 cm2. Specific ground pressure (dozer blade) - 118 kPa (1.20 kgf / cm2).

Hydraulic system

The capacity of the hydraulic system (blade) is 130 liters, (ripper) - 38 liters; the maximum flow is 230 liters per minute. Hydraulic cylinders (2 pcs.) - piston, double-acting. The closed center load sensing system is focused on providing accurate and fast control and efficient execution of work in parallel.

All spool control valves are externally mounted next to the hydraulic reservoir. 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.

The Komatsu D275A-5 dozer blade has a capacity of 13.7 m3 (hemispherical), or 16.6 m3 (spherical). This guarantees a consistently high performance of the special vehicle. The front plate and side cheeks of dozer blades are made of high strength steels. A double tilt blade is available on request.

The maximum depth of the blade is 640 mm;
maximum lift - 1450 mm.

A single shank ripper with an adjustable ripper angle is positioned well away from the axle of the drive wheel, which simplifies use and increases the efficiency of the ripper while maintaining a strong ripping force. The ripping angle of the single shank single shank ripper is adjustable. Linkage mechanism - parallelogram. It is the ideal tool for loosening hard rock and soil.

The multi-shank ripper has three shanks and a hydraulic parallelogram linkage.
Ripper lift height - 955 mm;
maximum loosening depth - 900 mm.

Keeping in mind that creating a comfortable working environment for the operator ultimately increases productivity and improves safety, Komatsu is equipping the D275A-5 with a low-noise cab, or a pressurized cab (optional). In any case, the cab of the special vehicle has damping elements and large tinted glass windows, giving excellent visibility in all sectors. The damping springs isolate the cab from the carrying frame of the special vehicle, providing decent operating comfort and a smooth tractor ride.

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 chair to the right at an angle of up to 15 °. The gearbox and steering controls move with the seat for maximum operator comfort. The motion console can also be moved forward and backward and is adjustable in height. The armrest height is individually adjustable so that the operator can operate the machine without changing the most comfortable position.

For many years now, Komatsu has been creating and improving the Man-Machine interface, an ergonomically sound control system. The joystick of the electronic movement control system of the special vehicle helps the operator to accurately control its maneuvers, while being in a fairly comfortable position and without making significant efforts.

Bulldozer weight (fully fueled) - 37 680 kg.
Bulldozer weight (with hemispherical blade and single-shank ripper) - 50 850 kg.
length - 9290 mm;
width - 4300 mm;
height - 3985 mm;
tracked 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 (on each side) - 40 liters.

The working volume is 15.24 liters.
Power - 306 kW (410 hp), at a speed of 2000 rpm.
The cylinder diameter is 140 mm, the piston stroke is 165 mm.

precise control of the alignment of road wheels and caterpillar tracks, which ensures an increase in the service life of the entire chassis;
reduction of shock loads on chassis elements;
carriages swing on 2 axes. Vertical track offset is increased to reduce shock loads on the undercarriage and increase component durability;
Operator comfort is improved by mitigating shock and vibration when navigating difficult terrain.

The lubricated track rollers are resiliently mounted on the track bogie using a series of uniquely designed cruciform carriages, the vibrational movements of which are absorbed by rubber pads.

The support area is 42,456 cm2. Specific ground pressure (dozer blade) - 118 kPa (1.20 kgf / cm2).

Hydraulic system

The maximum depth of the blade is 640 mm;
maximum lift - 1450 mm.

The multi-shank ripper has three shanks and a hydraulic parallelogram linkage.
Ripper lift height - 955 mm;
maximum loosening depth - 900 mm.

Bulldozer weight (fully fueled) - 37 680 kg.
Bulldozer weight (with hemispherical blade and single-shank ripper) - 50 850 kg.
length - 9290 mm;
width - 4300 mm;
height - 3985 mm;
tracked 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 (on each side) - 40 liters.

The Japanese are famous for their technique. Komatsu D275A-5 cars are made by the Japanese. This is an example of reliability and functionality - bulldozers. Machines from the manufacturer work for many years without any complaints. What can a car do? Carry out construction and quarry work. More precisely: digging, loosening, leveling the soil, and much more.

Modifications

Bulldozers Kamattsu are needed to solve problems in a variety of climatic and terrain conditions. The machines can be wheeled, caterpillar, there are also swamp vehicles and amphibious bulldozers. They can work in challenging conditions.

For the first time, a Japanese company released a tracked vehicle at the end of the 40s of the 20th century.

In the 21st century, these are cars with a power range from 85 to 899 liters. 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 bulldozer modifications: D275A-2, D275A-5.

A distinctive feature of the model lies in the maximum versatility of use, in comfort (we are talking about the driver). Plus, an economical and environmentally friendly engine is essential. These qualities will scold the original car from other modifications.

Attachments

A bulldozer from a Japanese manufacturer is used with numerous equipment:

dumps of impressive capacity;
blade of the 2nd skew;
single-shank rippers;
multi-shank rippers.

A grubber and a ripper shank act as attachments.

Cabin

The bulldozer is equipped with an electronic control system. Movement and related operations are provided by the left stick. And the actions with the gearbox are performed by buttons. 2 joystick is needed to regulate the blade, which functions with a valve of commensurate pressure control.

The machine is equipped with the ability to auto downshift. The controller is directed to important indicators:

rotation of the engine;
broadcast;
travel speed.

A suitable speed mode is selected on the machine.

The Komatsu D275A-5 is equipped with an adjustable seat with elastic suspension. The driver can rotate the seat 15 degrees, which greatly improves visibility. The gearbox controls move synchronously with the seat.

The interior of the vehicle is equipped with a suspension with damping components, which properly absorb shock loads and vibration due to their increased travel length.

You can complete the cab with all sorts of additions. Japanese experts provide a system for creating excess pressure inside the cabin. Additionally, you can mount a 2nd tilt blade. In this case, the angle of inclination can be 2 times greater.

When the key of the starting switch is activated in the on mode, the letter "P" appears on the special display of the monitor. In the lower right corner of the Komatsu D275A-5 panel, a pre-start check alert and a safety reminder alert are displayed.

If any unforeseen situations are detected, the alarm lamp comes on and an audible warning is activated.

During the operation of the car, in the right corner of the monitor, you can see information about the engine speed and the engaged reverse or forward gear. If unforeseen situations arise, the user code and the data of the hour meter will light up.

When a significant user code lights up on the screen, the alarm lamp comes on and works in a blinking mode, a sound will also follow, which indicates a possible breakdown. This avoids serious damage.

Specifications

The Japanese equip their cars with the best parts. Therefore, the engine was made by Japanese craftsmen. They created a 6-cylinder, four-stroke diesel engine. SDA6D140E includes the following:

turbocharging;
cooling the charge air;
direct fuel injection.

It is mounted on a Komatsu D275A-5 frame and uses rubber cushions to reduce the impact of external nuances. The structure of the motor emits a low level of toxins that meets European quality requirements.

The vehicle is equipped with a hydraulically driven fan and its frequency is automatically adjusted. The data on the coolant are taken into account.

Description of car engine:

working volume - 15.24 liters;
maximum power - 410 hp with.;
piston diameter - 14 cm.

The car has a cylindrical carrier rollers frame and suspension, which comes in an oscillating version. K-shaped carriages located in the undercarriage of the car maintain continuous contact between the track belt and the road roller. The vertical movement of the tracks increases, the slippage of the shoes decreases. The component reduces loading on the chassis and vibration directed to the body when traveling over bumpy terrain.

The Japanese equipped the Komatsu D275A-5 with volumetric spherical blades, which are made of ultra-strong steel. The single-shank rippers can be adjusted in terms of plowing depth. The ripping angle can be adjusted in 3 ranges. Additionally, you can mount a 2nd tilt blade.

The dimensions of the device are impressive, they arouse some interest:

length - 929 cm;
width - 430 cm;
height - 398.5 cm;
caterpillar base - 348 cm;
minimum radius of rotation - 390 cm;
ground clearance - 50.7 cm;
front track - 226 cm;
rear track - 226 cm;
caterpillar tire - 61, 71, 76 cm.

Weight is 37.680 tons. The operating weight is 50,850 tons. The car can reach speeds of up to 14.9 km / h. These indicators indicate that the car is capable of a lot.

Attention is drawn to the grouped service points. So, for greater comfort, the power train oil filter, dipsticks for determining the amount of oil in the power train components, the hydraulic tank are located on the right side of the car.

Hydraulics Komatsu D275A-5

The following can be said about the hydraulic system:

the number of shoes on both sides - 39;
standard shoe width - 61 cm;
lug height - 88 mm;
number of skating rinks on both sides - 7.

The Komatsu D275A-5 car should be classified as a new model. The TORQFLOW transmission is installed in it, it has shown itself to be the best in other products of the manufacturer.

Device

The high-quality construction of the vehicle makes it possible to call it highly technological and functional. The powerful vehicle is equipped with a robust base frame and a king-pin crawler track. This has a positive effect on overall reliability. The model of this plan attracts by the presence of a K-shaped carriage, which gives certain advantages:

increased control over the alignment of road wheels and caterpillar tracks (this increases the operating life of the undercarriage);
carriages swing on two axles (this reduces shock loads on the chassis parts, which increases durability);
comfortable working conditions for the driver due to soft shocks and reduced vibration when moving on difficult terrain.

The advantages of the undercarriage are duly assessed. The low drive position and long track contributes to optimal stability and flotation of the vehicle.

At the same time, it is worth inserting a few words about the availability of regular maintenance. Now this can be done quickly and conveniently, since the main service points are in a grouped position.

Pros and cons of D275A-5

A reliable bulldozer from the manufacturer has collected a lot of advantages:

high stability due to a low center of gravity;
high protection of hydraulics turbine lines;
the presence of a K-shaped undercarriage;
an engine complete with all the necessary additions;
affordable maintenance;
corrected track link design;
single-shank ripper;
smooth turn.

The disadvantages of this unit have not yet been identified. This does not mean that they do not exist. Experienced drivers note the following disadvantages:

not quite accurate design of the ripper, it does not bend enough to fit the canine;
low quality of rubber goods;
illogical position of headlights;
weak grille, lower armor, sloth shrouds.

These disadvantages do not have an exact confirmation, but they are talked about.

Prices

The bulldozer has always been expensive. This even applies to used models. For example, models of 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 the different configuration, the level of wear and tear and the accumulated 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 on the condition of the car.

Output

Komatsu D275A-5 cars are modern models. They are distinguished by sufficient equipment, eye-catching appearance, work efficiency and a wide range of applications. With the standard equipment, the car has everything you need for comfort:

driver's seat on a suspension, covered with eco leather;
lighting system with headlights;
hydraulic track tensioners;
automatic engine warming 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 MOT does not cause trouble. There is no need to get spare parts either. They are in the public domain, they can be found.

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