Excavator EO-2621 is a logicalcontinuation of the series of E-153, E-1514, E-2515. First released in 1955 in Kiev (E-153), with significant and not very updates, is used in construction and loading and unloading works to this day.
The basic version has a backhoe bucket, andin front of the bulldozer bucket, used, in addition to the main work (backfilling, snow removal and the like), also to counterbalance the main working body - the ladle. The popularity of this unit is due to the fact that the main working unit has a fairly wide range of applications, and in addition, there is the possibility of replacement. If the bulldozer is a permanent equipment, the bucket can be rotated 180 degrees (we get a straight shovel), and also replaced with other plants, the choice of which is quite wide.
Based on the tractor UMZ EO-2621 received"Strapping" frame, and on a separate frame - a bulldozer. In the rear part of this frame there is a rotary column on the chain drive and support shoes, lowered to the ground for additional stability during the operation of the main working body. In the factory supply, the working body is an arrow, a handle and a bucket.
The connection between the parts is articulated, the controlis produced by hydraulic cylinders, the first hydraulic cylinder being attached directly to the swivel part of the column by means of hinges. The column is welded-cast, consists of two parts, one part can rotate by means of bearings with respect to the other part fixed to the main part of the frame. In addition to the master cylinder, the boom has a special block at the bottom, fixing the inclination of all excavating equipment in the transport position. By means of a chain mechanism and two hydraulic cylinders of a column, the working equipment has the ability to turn around the vertical axis by 160 degrees.
The hydraulic system EO-2621 consists of twoseparate hydraulic drives having a common tank. Of these, one manages an arrow, a hilt and a bucket. In the second function, the work of the supports is included (in the released position they can lift the tractor half a meter above the parking level), and a rotary column system. Also through the hydraulic distributors, the second drive is responsible for the movement of the bulldozer bucket.
In addition to the basic functions, the excavator-bulldozer inspecifications has two additional, but the real range of opportunities is much broader. The bulldozer part is present for any job, and the rear part can be changed. It should be noted that the bucket can be turned 180 degrees - at this position, the bucket is rigidly fixed to the handle by additional rods, and the hydraulic cylinders of the handle are interlocked to the lower bracket. The hydraulics of the bucket controls its opening for unloading.
In addition, the EO-2621 excavator can be equipped withcrane or clamshell equipment. It is also possible to put a bucket of increased volume or replace it with forks. Separately we will mention that the system of the main unit allows using a wide range of devices not listed in the main documentation.
The use of a backhoe bucket in the basic version involves digging small pits, shallow trenches or canals, as well as trenches for underground communications.
The straight shovel option is suitable for operation when the surface is located above the parking level of the machine. The same bucket can be used to load bulk or fine lump weights.
Grapple can be used for cleaning pits, channels, or for digging wells. This "bucket" is well suited for the capture and loading of various materials.
There is in the arsenal of EO-2621 and a special loading bucket. The range of work of this variant differs little from the basic one, except that the bucket's sides are straight.
Interestingly, each of the above optionshas teeth for opening the asphalt or the top layer of the soil, but despite this, among the replaceable working units there is a disintegrating tooth and even a hydraulic hammer, which is used precisely to destroy the top layer of the soil. Which of them is better - the buyers decide, and we note that the tooth allows us to develop a frozen soil up to 300 mm deep. At the same time, a hydraulic hammer equipped with a tamping plate can be used not only for destruction - as follows from the name, thus it is possible to prepare a lower layer, for example, for laying tiles.
Characteristics of EO-2621 for the most partrepeats the tractor, which he, in fact, is. So, he has tractor wheels - front, rear, cabin height, also not much changed. Although due to the location of the main working unit from the rear, the driver's seat was able to turn 180 degrees, facing the levers of the excavator. So, the width of the wheel track is 1460 mm on the front, 1550 on the rear, the width of the frame from the bulldozer block will add to the track for about half a meter. But with the length of the base turned out to be interesting. The height of the operator's cab is 2450 mm, the length of the base is also 2450. The clearance is 450 mm.
Unlike other cars related toclass "Special equipment", a special speed of movement or some other exceptional opportunities are not here. The maximum speed of movement is only 19 km / h, the engine power is 45 kW. For convenience of use, the fuel tank is located on the side and has a vertical layout.
Due to a small own speed, sometimes the tractor is towed - the hinge on the "shovel" of the bulldozer is not included in the specification, but it is suitable for towing.
The strapping frame is a forced measure, sinceneither the designers of "Balarusi" nor the designers of YMZ did not plan to use the tractor for operation in such modes. The frame adds stability when working, distributing the load.
Как при обратной, так и прямой лопате, ЭО-2621 uses one bucket, which can be deployed directly on the site. The bucket is put on the ground, detached, turned over and fixed again. Then you need to shift the hydraulic cylinders to the other brackets on the bucket handle. For work it is desirable to have an assistant, and the entire replacement takes less than half an hour.
Интересной возможностью, которая вполне deserves a special mention, is the hook suspension. And although this is not a lifting crane, the work with a small load is entirely within the power of EO-2621. The user's comments called figures of the order of a half-ton.
Most sales firmsconstruction equipment, recommend imported cars, and very rarely where you will find mention of the EO-2621. Reviews on it are also not frequent. But if you put some imported CAT and a domestic EO-2621 alongside ... The price of domestic will be three times cheaper, and there are several orders of magnitude more opportunities. If we talk in numbers - SAT will cost about several million rubles. The price of EO-2621 rarely rises above a million.
The EO-2621 excavator by right carries the nameuniversal. Some possibilities of a backhoe bucket included in the basic kit allow using the machine in several versions. And any modification of the working body adds a few more to the basic capabilities. If we take into account that there are more than a dozen replaceable working bodies, the total number of options for using an excavator increases significantly. In short, it can be called a universal soldier who can be used with equal success both in the city and outside, both at construction sites and at communal facilities.
