For questions regarding the purchase of this equipment (EO-2621-B3 excavator-bulldozer ZLATEKS based on the MTZ 82 tractor), terms of credit and leasing, service and warranty, please contact the plant’s dealers or official representative offices. Delivery of the EO-2621-B3 excavator-bulldozer ZLATEKS based on the MTZ 82 tractor can be carried out either directly from the manufacturer or from sites in Moscow and other regions of the Russian Federation.
Excavator bulldozer EO 2621-B3
It is produced
on the basis of the MTZ 82 Belarus tractor
and is intended for the mechanization of excavation work in soils of categories I-IV and for loading operations.
The EO 2621-B3 excavator
is equipped with a backhoe bucket and a blade. The excavator can operate in temperate climates at temperatures from -40oC to +40oC.
Excavator device
The single-bucket excavator EO-2621 is mounted on the base chassis of the Belarus tractor YUMZ-6AL/6AM. It is equipped with a DT-65N diesel engine with a capacity of 65 hp. With. The tractor frame is reinforced with a strapping frame, which is the basis for mounting sets of removable equipment.
D-65 engine for the YuMZ tractor
In order to ensure stability during work, outriggers with a hydraulic drive are provided. An additional support is a bulldozer blade mounted in the front.
The design of the standard EO-2621 bucket allows it to be used in forward and backhoe modes. In addition, it is possible to use 22 additional working devices with various functions: grabs, hydraulic hammer, crane hook, forks, etc.
The design of the EO-2621 excavator, thanks to its replaceable tools, allows it to be used for a wide range of works:
Operation of the EO-2621 excavator
- digging pits;
- construction of embankments;
- removal of large debris;
- laying of pipelines;
- Loading Unloading;
- tree planting;
- uprooting stumps;
- installation of poles;
- opening of asphalt, etc.
Peculiarities
The EO-2621 excavator-bulldozer is capable of performing work in hard-to-reach places for other heavy and large equipment. Since it has a small weight and dimensions for working machines, and at the same time is capable of performing all the necessary work, like other excavators and bulldozers. Also, its long-distance maintenance, in comparison with the above mentioned equipment, will not require large expenditures of money. If various malfunctions of the EO-2621 mechanisms appear, thanks to the simple design, you can easily and quickly find the cause, and then eliminate all the problems, without having to take the machine for long repair work.
The excavator cabin is equipped with a heater and a system for filtering and heating the incoming air into the cabin, which makes it possible to operate the machine in various weather conditions while maintaining favorable conditions for the operator inside the cabin. The large glass area provides a fairly wide view of the surrounding area from all sides, which allows the operator to perform precise actions. The rear window can be opened if necessary.
Technical specifications
Technical characteristics of the EO-2621 excavator are presented in the table:
| No. | Characteristic | Meaning |
| 1 | Dimensions (length, width, height), m Cabin height, m | 6.48x2.2x3.8 2.46 |
| 2 | Weight without attachments, t Weight with standard attachments, t | 5.7 6.1 |
| 3 | Diesel engine, power, l. With. | DT-65N, 65 |
| 4 | Fuel tank volume, l | 100 |
| 5 | Travel speed, km/h. | 2.1-19 |
| 6 | Permissible road slope, 0 | 10-17 |
| 7 | Rear wheel track width, cm | 155 |
| 8 | Ground clearance, mm | 450 |
| 9 | Productivity, m3/h. | 40 |
| 10 | Digging radius: backhoe/straight, cm | 500/470 |
| 11 | Digging depth, cm | up to 300 |
| 12 | Average cycle time: front shovel/backhoe, sec. | 15/18 |
| 13 | Standard bucket volume, m3 | 0.25 |
| 14 | Volume of replaceable buckets, m3 | 0.15-0.5 |
| 15 | Loading height: backhoe/straight, m | 2.2/3.3 |
| 16 | Cutting force: straight shovel/reverse shovel, Kn | 25/26 |
| 17 | Load capacity with hook suspension, t | 0.5 |
| 18 | Maximum lifting height with hook, m | 3.8 |
| 19 | Boom radius at maximum lift height, m | 2.3 |
| 20 | Working pressure of separate hydraulic system: for excavator/bulldozer, MPa | 10/7.5 |
| 21 | Minimum turning radius with attachments in transport position, m | 6.3 |
| 22 | Equipment rotation angle, 0 | 160 |
Engine
The EO-2621 excavator-bulldozer is equipped with a four-cylinder power unit of the D-243 brand, the maximum power of which is 80 horsepower or 60 kilowatts. The maximum torque that this unit can develop is 280 Nm. This engine runs on diesel fuel. The torque reserve factor is 15 percent. All cylinders of this unit have a diameter of 110 millimeters. The piston stroke is 125 millimeters. The crankshaft can develop a maximum rotation speed of 2200 rpm. The mass of the assembled engine is 430 kilograms.
But the excavator model, based on the YuMZ-6AL and YuMZ-6AM tractors, has a slightly weaker engine. Its rated power is 60 horsepower or 44 kilowatts.
Hydraulic system characteristics
To control the bulldozer and excavator, two autonomous hydraulic systems are provided, using a common tank for working fluid. The pressure level is regulated by safety valves. The EO-2621 hydraulic system includes hydraulic cylinders (for outriggers, bulldozer, turning mechanism, handle, bucket and boom), pumps, valves of various types, and distributors.
Hydraulic system of the EO-2621 excavator
Purpose
The EO 2621 excavator is designed for carrying out land and many other works in agriculture, forestry, public utilities, as well as in construction. This machine performs the following: digging trenches and backfilling them, loading work, some installation work, destructive work (using a hydraulic hammer instead of a bucket), leveling the site, clearing the working area and road area from snow retention, loading and unloading various vegetation (silage, hay and many others ).
Cabin equipment
The EO-2621 cabin is equipped with efficient ventilation and heating systems. The seat rotation angle is 1800. The working space provides convenient placement of control handles and panels in the front and rear of the cab. They are divided into groups for managing excavator and bulldozer equipment. The panoramic window of the EO-2621 cabin allows you to control the progress of work.
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Attachments
The EO 2621 excavator-bulldozer uses both standard (factory) attachments and a variety of other equipment, which allows the machine to expand the range of tasks it performs. This equipment uses the following attachments:
- Front blade.
- Rear side hydraulic struts, giving the excavator high stability when doing digging work.
- Hydraulic manipulator.
- Ladle. The volume is 250 cubic centimeters.
- Grab forks.
- Hydraulic hammer NM-120, which is installed on the manipulator.
Technical characteristics of the ZLATEKS GPM-200 hydraulic hammer
| Overall dimensions, mm | Length | 1460 |
| Width | 325 | |
| Height | 430 | |
| Weight of impact part, kg | 60 ± 3 | |
| Operating weight, no more, kg | 380 | |
| Single impact energy, kJ | 2 | |
| Nominal impact frequency, beats/min. | 180 | |
| Battery charging pressure, no more than, kgf/m2 | 12 | |
| Excavator compatibility | EO 2621 | |
| EO 2626 | ||
| EO 3626 | ||
Excavator equipment is hung on the main (strap) frame and the bulldozer frame. The middle part of the frame is attached to the sleeves of the tractor axle shafts, and the front part is attached to the longitudinal beams of the engine. A rotating column with a chain turning mechanism and support shoes are mounted on the frame at the back. Working equipment consisting of a boom, a handle and a bucket is installed on the rotary column. The connection of the elements is hinged, the equipment is controlled by hydraulic cylinders. The bulldozer blade is connected to frames, which are pushed by bars and a hydraulic cylinder. Excavator equipment is mounted at the rear of the tractor on a frame. It consists of a rotary column, boom, arm and bucket, controlled by hydraulic cylinders. The column body is welded and can rotate on bearings relative to the cast steel glass. In the upper part, the column body has an eye to which the boom hydraulic cylinder is pivotally attached. A finger is installed on the heel of the boom in the tide to fix the rotation of the column in the transport position. A sprocket is secured to the splines of the lower part of the body with a nut, onto which a bushing-roller chain is mounted. It is connected through rods to the hydraulic cylinder rods for controlling the rotation of the column. Both hydraulic cylinders work alternately: if the rod of one cylinder retracts, the other, idling, goes out. For stability of the excavator, outriggers are provided. The support shoes are hinged to the eyes of the main frame. In the working position, they can fall slightly below the excavator parking level (by 0.25 - 0.35 m). The shoes are controlled by two hydraulic cylinders. The working fluid from the tank is supplied to the hydraulic cylinders by a pumping unit through pipelines through a hydraulic distributor. The EO-2621A excavator uses two independent hydraulic systems with a common tank for working fluid. The first drives the working equipment from three gear pumps of the NSh-32E type; the liquid is supplied through a distributor to the hydraulic cylinders of the bucket, arm and boom. The second system supplies fluid from the pump through a distributor to the hydraulic cylinder of the boom, to the hydraulic cylinders of the turning mechanism, and through the tractor distributor to the hydraulic cylinders of the outriggers and the hydraulic cylinder of the bulldozer. The boom and arm are of welded construction, variable box section. The fifth boom is pivotally connected to the base of the rotary column. When converting to a straight shovel, the bucket is installed with its teeth outward and secured to the lower fork of the handle with additional rods. The hydraulic cylinder rods of the handle are attached to its lower bracket using a finger. The bottom of the bucket is hingedly connected to its body by an axle, and it rotates freely by means of a hydraulic cylinder. The driver's cabin and driver's seat are designed so that the driver has the ability to alternately control either excavator or bulldozer equipment. For the operator’s convenience, the fuel tank is located in the front part of the tractor.
Wheel track: front 1460 mm, rear 1560 mm. Excavator base 2450 mm. The rotation angle of the working equipment is 160°. The capacity of the shovel and backhoe bucket is 0.25 m3. The largest digging radius is 5000 mm; maximum digging depth 3000 mm; maximum unloading height 2200 mm. Duty cycle at maximum depth 18 s. Capacity 40 m/h. Bulldozer equipment has the following characteristics: blade width 2000 mm; blade height 680 mm; cutting depth 500 mm. Dimensions: length in transport position 6480 mm, width 2200 mm, height 3900 mm. Weight 5700 kg.
The EO-2621A excavator is mounted on a YuMZ-6L/6M pneumatic wheel tractor, and later on a modernized YuMZ-6AL/AM tractor. A further development of the model is the EO-2621V excavator. Produced since the early 70s. at the Kiev, Galich, Zlatoust and Saransk excavator plants.
Price new and used
As described earlier, this machine has a fairly low cost, both for a new version and for a used one. A new car is available for sale at a price from 500 thousand to 800 thousand Russian rubles, when the cost of used equipment starts from 100 thousand and ends at 450 thousand Russian rubles. The cost for both options may vary depending on the year of production, version (on what basis the EO 2621 was designed) and the general condition of the machine (if this is, of course, a supported option).
