Excavator EO-3323: technical characteristics, dimensions, weight, dimensions, operating features and application in industry

general information

The EO-3323 excavator is most often used for digging pits, trenches, and loading rocky and frozen soil into a dump. The design of the equipment allows it to be used in urban environments and in open areas. Serial production of this model has been discontinued, but it continues to be widely used.

The EO-3323 excavator is classified as a single-bucket dredging machine. The equipment moves on wheels, which simplifies the process of transportation to the workplace. One of the main positive qualities of a tractor is its durability. According to the technical documentation, the unit has a working life of 8 thousand hours without major repairs. The machine can be operated in the most difficult conditions. Statistics show that equipment can operate up to 14 thousand hours without serious breakdowns.

History of creation

Initially, from 1970 to 1987, excavators of this brand were made at the Leningrad Excavator Plant (LEZ), and from 1970 to 2001 - in Kalinin (now the city of Tver), at the Kalinin Excavator Plant (KEZ).

Leningrad Excavator Plant , closed in 1987, traced its history back to 1913. First - as a weapons enterprise "Machine Gun", producing small arms and ammunition for them. After the First World War and the Civil War - as a Mechanical Repair Plant (for the maintenance and repair of imported equipment, including excavators). In 1937, the plant produced its first own products: cranes with a lifting capacity of 5 tons on an automobile chassis and excavators on a tractor chassis (STZ and KhTZ).

During the Great Patriotic War, the plant was evacuated to Nizhny Tagil. A tank repair enterprise operated at the remaining production facilities. In the post-war years, the production of excavators at LEZ was resumed and continued until November 1987. In total, during this time the plant produced 33 thousand excavators of various brands.

The Kalinin Excavator Plant was founded in 1939, but the Great Patriotic War prevented the completion of the construction of its workshops. Completion of the enterprise began in January 1943. Even before it was completed, the plant was already on the list of operating ones and produced, not yet its core products, but the country needed them - spare parts for various equipment. The workers lived in army tents and worked partly in the open air.

The first excavators , brand "D-107" , were produced by the company in 1946. Subsequently, all models of excavators were produced in close cooperation with the Leningrad Excavator Plant. In the second half of the 70s, the main series and calling card of the plant for many years was “EO-3322”. This equipment was exported to dozens of countries around the world. “EO-3322” was awarded the All-Union Quality Mark in 1978. In 1981, on the occasion of the production of the 50,000th excavator, the Kalinin plant was awarded the Order of the Red Banner of Labor.

In the 90s, the enterprise, like the entire domestic economy, was in a fever. However, the plant survived, largely due to the presence of a number of export contracts. Until 2001, the EO-3322 remained on the assembly line .

Today, under the name OJSC Tverskoy Excavator, the enterprise produces a wide range of modern equipment under the brands Tveks and Terex. Of course, we are not talking about previous production volumes, but still the plant operates stably, employing more than six hundred people (as of 2016).

The wheeled full-rotary excavator "EO-3322" was mass-produced by the Leningrad and Kalinin excavator plants with replaceable working equipment (backhoe, grab and loader). For these early production excavators, the permanent (non-removable) component of the working equipment was the lower (main) part of the boom and lifting hydraulic cylinders. Subsequently, the boom on the “EO-3322” became monoblock.

The excavators of the two factories can be distinguished by one characteristic feature “LEZ EO-3322” was cast on the back of the counterweight of the Leningrad excavators , but there was nothing on the Kalinin ones. However, it can be assumed that the excavators produced at LEZ (closed in 1987) have practically not survived to the present day.

Technical characteristics of the EO-3323 excavator

Below are the main parameters of the modification in question:

• Type of power unit - diesel engine type D-243.
• Power indicator - 81 hp. With.
• The pressure in the hydraulic system is 28 MPa.
• The operating cycle duration is 16 seconds.
• Travel speed - 20 km/h.
• The main working tool is a backhoe with a bucket with a capacity of 0.65 cubic meters.
• Weight with equipment - 12.4 tons.
• Unloading height - 5.63 m.
• The frame is of welded type.
• Stable platform on pneumatic wheels.

Features of using the EO-3326 excavator

Currently, excavators with a hydraulic system are quite widely used in various construction works. Most often, equators EO - 3326 are used:

• When loading various building materials, soil;
• When performing diverse earthworks: excavation, digging pits and trenches;
• When clearing the area of ​​construction waste;
• When preparing the site, before building a house;
• When developing in the gas and oil industry;
• During the construction of road surfaces.

Advantages and disadvantages

Among the advantages of the EO-3323 excavator, the following points are noted:

• Operational reliability.
• Comfortable control of attachments.
• Special vibration protection.
• High-precision operation of hydraulic equipment.
• The presence of a special sensor that allows you to monitor the shift in the placement of devices while moving.
• A pair of folding supports guaranteeing complete stability of the equipment during operation, taking into account the large dimensions of the model.

The disadvantages include an obsolete design, high fuel consumption, low level of operator comfort, and the lack of an air purification system and air conditioning.

The main advantages of using the EO-3326 excavator

Among the advantages of using such machines, the following points can be noted:

• High engine power ;
• Excellent technical characteristics;
• Possibility of continuous operation for a long time;
• Performing work in difficult environmental conditions;
• Maintainability.

In this case, it is possible to both purchase and rent this type of equipment. The feasibility of a particular solution depends on the tasks set and the period for which you will need such an excavator.

Design features

In its standard version, the Kalininets EO-3323 excavator is equipped with a diesel power unit located on the right side of the platform. For regions with mild climates, a D-75P1 configuration motor with an electric drive is installed, which makes it possible to start the unit directly.

The enhanced hydraulics of the EO 3323 excavator makes control as simplified as possible. The cabin is equipped with a pair of vertical posts, a conveniently placed control panel, and a rounded steering wheel. This configuration ensures that manipulation is carried out quickly and accurately.

Despite the fact that the engine power is only 75 “horses”, the speed limit of the car reaches 20 km/h. Such parameters ensure that the tractor can be transported to the work site under its own power. Improved modifications are equipped with a reinforced engine with a power of 81 hp. With.

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Working systems

The EO-3323 excavator, the characteristics of which are given above, in the second generation has an improved design, the elements of which have high productivity with low specific material consumption and increased driver comfort.

The car received a significant improvement thanks to the introduction of updated systems. Hydraulics of equipment includes several components and assemblies, namely:

• Hydraulic motors.
• Built-in pump.
• A pair of distributors with four spools.
• Additional monoblock synchronizer.
• Line and filling filters with a processing level of 25 microns.
• Oil cooler.
• Steering with hydraulic metering type.
• Pipelines.
• Storage tank.
• Automatic protective systems.

As a result of modification of the design, the performance of the hydraulic system increased, the maximum pressure increased to 28 MPa. The performance indicator was 60 liters per minute. Such parameters are considered high-performance for that period. All of these points made it possible to reduce the weight of the machine.

Features of the repair of the EO-3326 excavator

All equipment requires periodic maintenance and sometimes repairs. The most common reasons for the failure of EO-3326 excavators are: the use of out-of-season fuel, natural wear and tear of working units, and violation of the rules of technical operation of the equipment by the owners.

Also common:

• Failure of the hydraulic system . Its main components are: hydraulic pump, hydraulic cylinder and hydraulic motor . The latter ensures the maneuverability of the bucket, which means that it is these parts that bear the greatest level of load during operation of the equipment. Mostly the following types of failures occur here: wear of the inner surface of the liner, wear of the piston seal, damage to the thread ;
• Valve failure. The reason for this is most often incorrect regulation of the gas distribution system ;
• Broken fingers on an excavator bucket. To avoid this breakdown when frequently changing the excavator bucket, you should also periodically change the bucket pins .

Remember, by following the rules of technical operation of such equipment, as well as carrying out timely technical inspection, you can avoid many serious breakdowns, which means you can save yourself from unplanned financial costs.

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Chassis

The excavator in question is placed on a fully rotating platform with pneumatic wheels. The base has an elongated boom with a handle, which is connected to the working body. The platform rotates using a hydraulic drive and a dual-mode planetary gearbox.

The chassis is a welded metal structure with a 4x4 wheel arrangement. The front part of the front axle is controlled; two retractable supports are installed on the chassis. A bulldozer blade is placed at the front, acting as a third support; the design of the device allows it to be transported at a speed of 50 km/h.

Design Features

The EO-3322 excavator has an original design that allows hydraulic equipment and the driver’s cabin to rotate freely around an axis mounted on the platform, which minimizes the number of unnecessary movements during loading and other work. This capability gives the operator the best possible overview of the job at hand, increasing job coverage and increasing excavator productivity. The equipment grabs soil within the reach of its boom and turns in the required direction, after which it pours it out.

The excavator moves on pneumatic wheels. In this case, the specific pressure on the ground is 0.04 MPa. The EO-3322 excavator is capable of freely negotiating slopes with a 20-degree steepness.

Other characteristic features of the EO-3322 excavators. Hydraulic reinforcement of the steering mechanism, facilitating control; non-removable lifting hydraulic cylinders and the lower part of the boom. “EO-3322” is also called a “hydraulic excavator”, since not only the entire complex of work operations, but even the very movement of this equipment is provided by a system of hydraulic drives.

Attachments and main equipment

The list of standard working accessories of the excavator includes a backhoe and a monoblock L-shaped boom. The main mechanisms are made of low-alloy steel and are highly resistant to corrosion and wear.

Characteristics of a straight shovel:

• The soil cutting rate is 100 kN.
• Maximum digging radius/height - 6780/7660 mm.
• Unloading - 4200 mm.
• Soil cutting force (maximum) - 100 kN.
• Maximum processing depth is 5400 mm.
• Bucket capacity is from 0.5 to 0.8 cubic meters.

Among the additional accessories, the tractor can be equipped with a boom handle of various lengths from 1900 to 3400 millimeters, a straight loading bucket with a capacity of 1.2 “cubes”, allowing you to handle cargo with a density of up to 1.4 t/cube. m.

Among other equipment:

• Hydraulic hammer with replaceable tips.
• Ripper for frozen soils.
• Tamper plate.
• Auger and drilling equipment.
• Lifting devices.

Cabin

The workplace of the equipment in question is one of the most important elements of equipment. According to the new standards, it must comply with certain rules and requirements. The cabin configuration has a rigid frame with increased torsion resistance. A pair of vertical posts act as fixing parts.

The driver's seat is adjustable horizontally and vertically, equipped with a shock-absorbing system and a seat belt. Rear-view mirrors are mounted outside the cabin; additionally, analogues are provided for fixing “dead” spots. Comfort is enhanced by a heater, modern control devices, sun visors, and windshield wipers. There are also two server consoles.

Dimensions and purpose

Basic size indicators:

• The weight of the EO 3323 excavator is 14 tons.
• Length/width/height - 7.55/2.5/3.7 m.
• Purpose: loading and unloading bulk materials.
• Digging trenches, channels, pits, including soils of the fourth category.
• Development of quarries and frozen soils.
• Construction application.

Advantages and disadvantages

The advantage of excavators: simplicity of design and maintainability - speaks for itself. In addition, it is worth noting:

• Low fuel consumption of 12.5 l/hour at any load;
• Ergonomic organization of the operator’s workspace;
• Work in 3 planes and 2 levels, relative to the location of the machine;
• Favorable ratio of cost and quality of services.

The disadvantages include the fleet of equipment decreasing every year and the lack of original spare parts.