Crawler excavator DOOSAN DX300LCA buy, price, specifications, photos, description

The Doosan DX300LCA crawler excavator is a representative of the middle category of construction equipment. This model was developed by the South Korean manufacturer Doosan Infracore, which specializes in mass production of not only heavy machines, but also equipment intended for work in public utilities and road construction industries. The latter often uses the DX300LCA model. The model index contains several designations indicating certain features of the technology. So, DX indicates the series to which this excavator belongs, while LC means the presence of an extended tracked platform. Such vehicles have significantly increased stability and maneuverability compared to equipment with a standard tracked base. It is worth noting that the demand for them is also slightly higher, since excavators with an extended base can perform any operations in hard-to-reach places, such as soil with reduced bearing capacity and swampy areas. This model has been on the world market for quite a long time and during all this time the equipment has received a lot of positive reviews, which is explained by many different features and advantages.

Purpose

Due to its fairly high technical and operational characteristics, the Dusan 300 crawler excavator is often used in construction, industry, agriculture, dismantling work and road repair services. The equipment allows you to perform all types of earthmoving work, and this is with standard equipment. Paired with additional units, the model is able to cope with the destruction of any objects, loosening hard soils and rocks, compacting loose soil, opening asphalt and concrete surfaces, drilling various wells and much more.

Specifications

The weight of the Doosan DX300LCA is quite impressive and amounts to 29.6 tons. However, due to the caterpillar track (0.6 m wide belt), the pressure on the ground is only 0.56 kg/sq.m. cm. At the same time, the maximum speed reaches 5.1 km/h, with a fully loaded bucket with a capacity of 1.5 cubic meters. m, the excavator is capable of moving at a speed of 3 km/h. Also, the technical characteristics of the Doosan DX300LCA include unloading height and digging depth, equal to 10.33 m and 7.36 m, respectively. The unloading height at the limit is 11.93 m.

The dimensions of the machine are 10.62 m x 3.2 m x 3.345 m. The length of the arm and boom is 3.1 m and 6.245 m, respectively.

Ladle

• The type of bucket installed is earthmoving.
• The smallest capacity of the installed bucket is 0.9 cubic meters.
• The largest capacity of the installed bucket is 1.50 cubic meters.
• The maximum digging depth is 7360 millimeters.
• The maximum digging height is 10330 millimeters.
• The maximum height of the bucket unloading is 11930 mm.

Engine

The Doosan 300 is equipped with a power unit of its own production. The DE08TIS model is a six-cylinder unit with a volume of 8 liters with a direct fuel injection system and a liquid cooling system (water). A filter is also included as standard to clean the air needed for turbocharging. It filters the air from dust particles, which are subsequently discharged automatically. Engine power is 147 kW or 200 horsepower. A starter is provided to start the power plant. Torque – 860 kNm, rotation speed – 1900 rpm per minute of operation.

• The type of engine installed is in-line, diesel.
• Engine make: DE08TIS.
• Engine manufacturer: Doosan.
• Number of cylinders - 6.
• The working volume of all cylinders is 7990 cubic meters.
• Rated output power is 147 kilowatts/205 horsepower (at 1900 rpm).
• The nominal crankshaft speed is 1900 rpm.
• Maximum torque is 843.3 kilonewtons per meter (at 1550 rpm).
• Cooling system type: liquid.
• Starting system type: electric starter.
• The type of turbocharging system is gas turbine with subsequent cooling of the charged air.
• The lowest fuel consumption per working hour is 28.4 liters.
• The highest fuel consumption per working hour is 35.5 liters.
• The lowest speed of independent movement is 3 kilometers per hour.
• The highest speed of independent movement is 5.1 kilometers per hour.

Fuel consumption

Fuel consumption of Dusan 300 ranges from 150-170 g/hp. per hour of work, which in comparison with other models of this class is an undeniable advantage. The diesel fuel tank is designed for 500 liters. This allows you to work for a long time without refueling.

Dimensions:

• The structural length of the excavator is 10620 millimeters.
• The full width of the tracked platform is 3200 millimeters.
• The total height of the cabin roof is 3345 millimeters.
• The width of the track shoes is 600 millimeters.
• Boom length - 6245 millimeters.
• The length of the handle is 3100 millimeters.

Chassis

The supporting structure of the Doosan DX300LCA excavator is D-shaped, which increases strength characteristics and reduces the risk of deformation under dynamic load. Modern technologies are used in the handle assembly. Now all protrusions and cast units are reinforced with additional elements that increase the wear resistance and strength of the assembly as a whole. The Dusan 300 excavator has a long trouble-free operation.

The track chain consists of sealed links that are protected from contamination and are automatically lubricated. Wide and reliable caterpillar tracks give the excavator the ability to overcome difficult sections of the road and off-road. Hydraulic tension regulators are equipped with shock-absorbing elements. To drive the track, an axial piston unit with high torque is used. The controls use pedals and levers that allow the equipment to move smoothly back and forth.

The cross-shaped chassis of the Doosan DX300LCA excavator is designed in accordance with modern trends in mechanical engineering. Thanks to the improved design, the chassis is highly stable and durable, and the rotating mechanism has the same advantages. The force from the load is evenly distributed due to the improved shape of the boom mechanism. Thicker steel increases the wear resistance of the unit, which increases its service life.

Hydraulic system

The Doosan 300 e-EPOS performance optimization system streamlines the operation of the power plant and hydraulic system. Thanks to this system, the machine is highly efficient in any type of work, and fuel consumption remains minimal. The crawler excavator system works in conjunction with the electronic motor controller, information is transmitted via cable. In this way, the performance of the motor and hydraulics is optimized.

The main qualities of the hydraulic system include:

• the possibility of electronic control over the operation of the hydraulic pump;
• installation of a power adjustment button for the additional hydraulic circuit;
• the presence of several operating modes to optimize the workflow;
• automatic reduction of engine speed when idling;
• installation of a pumping system with sensitive load control to reduce fuel consumption;
• installation of a gearbox with two gears. It allows you to increase torque and traction force if necessary;
• the ability to carry out work processes independently and collaboratively.

Modifications

There are varieties of this model: DX 300 SLR and DX 300 LL. The first is characterized by an increased working radius (up to 17.5 m) and digging depth (14 m). The boom length of the SLR version is 10 m, the length of the handle is 7 m. The DX 300 A front loader was developed on the same basis.

Doosan DX 300 LL is designed primarily for work in forestry. It is equipped with a special device for grabbing logs, has reliable protection for the cabin from impacts, as well as glass that will not cause injury if broken. The abbreviation LL stands for Log Loader, which literally means “log loader”. This, of course, does not mean that this type of work is the only thing this excavator is suitable for. He can successfully perform various earthmoving jobs.

Device

The Dusan 300 excavator has quite high productivity, which is influenced by a modern power optimization system called e-EPOS. This system is often found in almost all models manufactured by Doosan Infracore. The system has a fairly strong influence not only on the power performance of the equipment, but also on the efficiency of the power plant, since it automatically reduces the crankshaft speed when the hydraulic system is inactive. The particular benefit of this is greatly manifested during very long-term operation, since compared to analogues, the equipment requires less investment in refueling. In addition, the e-EPOS system provides several operating modes that allow you to improve certain parameters of the excavator. There are two operating modes in total, namely the standard one, that is, no changes in operation occur, and the enhanced one, which allows the machine to cope with heavy loads.

According to experts, the Doosan DX300LCA crawler excavator is one of the most successful among its segment (excavator equipment equipped with a bucket with a capacity of 1.5 cubic meters).

In addition to the features that were mentioned above, this machine has several more important advantages, including:

1. Simple and inexpensive maintenance. The manufacturer managed to significantly reduce the time required for diagnostics or repairs by increasing service intervals. Thanks to this, the equipment can remain on the work site for quite a long time. The cooling system radiators were moved to a very convenient location, which not only simplified the maintenance process, but also made it quick.
2. The operator can perform any work with maximum comfort. This is due to the presence of many different electronics, which are easy to use. The operator is not confused even with a fairly extensive range of different functions. This is what makes arranging his workplace in accordance with safety and ergonomic standards so important. The excavator cabin is equipped with a comfortable adjustable seat and an air conditioning system. In addition, a distinctive feature of the cabin is the large free space, which also has a positive effect on work comfort.
3. The excavator is highly reliable. All functioning components, namely the boom, arm, chassis, tracks and platform frame, have been significantly improved, which has allowed not only to achieve increased strength, but also an extended service life.
4. High productivity of technology. This is due not only to a modern hydraulic system and a fairly powerful power plant, but also to a variety of special electronic systems that allow for greater efficiency.

To perform certain types of work, the manufacturer offers several different additional attachments that allow you to perform the required operations, both for light work and for labor-intensive work on a construction site. Thanks to the tracked platform, the equipment is often used in places inaccessible to wheeled vehicles, which significantly expands the scope of application. However, in this regard, the model also has one drawback, since transportation between objects requires the use of a special trailer and tractor, since the caterpillar drive not only does not allow one to develop the optimal speed of independent movement, but can also cause various damage to asphalt surfaces.

As described above, the functioning components of the equipment have been improved. Thus, the digging bucket, boom and handle of the model received metal-ceramic rotary bushings, which made it possible to increase the lubrication intervals for these elements to 250 working hours. In addition, this decision had a positive effect on increasing the service life, which also reduces material costs when maintaining the excavator. As with most other modern machines (not just excavators), the service points of the equipment have been grouped, and this is also the case in this model, which simplifies the maintenance process.

A distinctive feature of the entire excavator design is increased reliability and strength. The design itself contains many welded elements, specially designed to work in rather difficult conditions.

The turntable frame has traditionally been made in a D-shape, which not only increases the structural strength, but also provides high resistance to various deformations that occur in the event of shock loads and collisions.

The track chain of the Dusan 300 excavator consists of sealed links that have reliable protection against various contaminants. Moreover, such links do not need to be lubricated regularly, since they are equipped with a self-lubrication function, which is quite convenient. Heavy-duty tracks allow the excavator to travel over rough terrain, and hydraulic tensioners have a shock-absorbing tensioning mechanism that smooths out severe shaking and minimizes vibration. Each track is driven by an independent axial piston hydraulic pump, which provides high torque. The smoothness of the ride, as well as the turning of the equipment on the spot (the movement of the tracks in opposite directions) is controlled by pedals and two levers.

The tracked platform has an X-shaped frame, manufactured using the latest technology, which provides this element with high resistance to high loads and a huge margin of safety. The shape of the boom was optimized and supplemented with reinforcements, which made it possible to achieve uniform distribution of the load force throughout the structure. Together with the increased thickness of the materials used, this ensures an increased service life.

Cabin

The Doosan DX300LCA crawler excavator has an all-weather cab with a high level of sound insulation and operator safety. The cabin has many technical equipment, including an air conditioning system, a large color display, a heating system and other similar equipment. Inside there is a comfortable adjustable operator's seat, complemented by armrests and a headrest, which can also be adjusted if necessary. The standard air conditioner is equipped with several operating modes, which, together with the heating system, allows you to achieve a very comfortable microclimate. Optionally, the cabin can be equipped with a special heated seat, which provides increased comfort during operation in the winter season. The operating equipment controls are convenient joysticks, equipped with position adjustment and additional functions, which ensures high productivity and comfortable work.

The standard cabin equipment includes the following elements:

1. Removable front lower window.
2. Sliding front window.
3. Damping mounts to minimize vibration.
4. Windshield wiper with intermittent operation.
5. Protective screen.
6. Cassette player.
7. AM/FM radio.
8. Serial communication port for interaction with the on-board computer.
9. Glass stand.
10. Radio remote switch.
11. Interior lighting.
12. Power unit speed control dial.
13. Thermos.
14. Transparent roof.

Advantages, disadvantages and price

The advantages of this excavator are its efficiency, moderate fuel consumption, excellent performance at a reasonable price. On the secondary market, its cost ranges from 3,000,000 to 8,000,000 rubles. The engines installed on the DX 300 comply with Euro-2 - Euro 4 requirements (depending on the model). Therefore, the owner is guaranteed low fuel consumption and minimal air emissions.

Owners of Doosan excavators and service employees note the insufficient reliability of the hydraulic system, as well as low build quality. During operation, sometimes small parts fail. It is not recommended to use these excavators in very low temperature conditions.

If you have a service center nearby, the Doosan DX 300 LCA excavator can be a profitable purchase.