Technical characteristics and modifications of the EO-4225 excavator

The EO 4225 crawler excavator is a prominent representative of heavy-duty special equipment. Designed for the development of heavy soils, it copes well with viscous clays and even rocky and frozen soils, subject to preliminary loosening and crushing to pieces of 400 mm or less. Widely used in all types of excavation work from quarrying to loading sand, soil and other bulk materials. By coincidence, this model became the last major project of the Kovrov plant. It was produced from the early 1990s until the 2010s, until the plant ceased to exist. Today, excavators from the Kovrov plant are still widely used in the construction, road, and oil and gas industries.

Specifications

Dimensions:

• length – 4900 mm (without bucket);
• width – 2900 mm;
• height – 3060 mm.

Other characteristics:

1. Ground clearance – 942 mm.
2. Travel speed – 2.8 km/hour.
3. Productivity – up to 150 cubic meters/hour.
4. The number of platform revolutions per minute is 6.
5. The radius described by the tail part of the platform is 3.13 m.
6. The capacity of the working bucket is 0.65–1.5 cubic meters.

Radius/digging depth:

• backhoe – 9.2 / 5.8 m;
• straight shovel – 7.25 / 3.6 m;
• grab – 8.9 / 3.2 m;
• loader - 3.75 m.

The force on the bucket teeth is 14,200 kgf. Loading height – 5 meters.

Weight:

• with a straight shovel - 19.87 tons;
• with a backhoe - 20.9 tons;
• with grab – 20.9 t;
• with loader – 19.87 tons.

Cycle duration:

• with a straight shovel and loader – 16 seconds;
• with a backhoe – 20 seconds.

Ground pressure – 63.6 kPa.

Engine - diesel:

• volume – 11.15 l;
• power – 135 hp;
• fuel consumption – 163 g/hp-h;
• Oil consumption for waste is 0.3% of fuel consumption.

Dimensions

The technical characteristics of the EO 4121 excavator allow it to be classified into the 4th size group. This means that it is designed to work with buckets with a capacity of 0.65-1.5 cubic meters. Using smaller buckets will be ineffective; using larger buckets will overload the mechanism. The length of the excavator without bucket is 4900 mm, width – 2900 mm, height – 3060 mm. The height of the boom heel axis is 2020 mm. The distance from the heel axis to the rotation axis is 520 mm.

Engine

The EO-4121 excavators were equipped with A-01 and A-01M diesel engines manufactured at the Altai Motor Plant. The developers were faced with the task of designing a motor that was as simple in design and unpretentious as possible, which would operate in a wide temperature range and would not require complex and frequent maintenance. The result was a six-cylinder, four-stroke naturally aspirated diesel engine, which is still being successfully produced today. It is equipped with agricultural and forestry tractors, as well as road construction equipment.

Excavator diagram EO 4121

Each cylinder was equipped with a two-valve gas distribution mechanism. The cylinders are arranged in a row, vertically. Fuel supply to the cylinder is provided by direct injection. Cooling is liquid. For reliable starting, a special single-cylinder starting engine “PD-10U” is provided. Its power is 10 hp. With. For winter starting, the engine is equipped with a PZHB-300V pre-heater. In winter development conditions, this ensured reliable operation of the excavator.

The system was equipped with a spool-type injection pump, multi-hole injectors and a cyclone-type centrifugal air filter. A number of innovations were used in the design of the engine and fuel system, which made it possible to increase its service life to 12,000 operating hours.

Chassis

The chassis is a caterpillar mechanism. Unlike earlier models, each track received its impulse from an individual hydraulic motor through a gearbox. The tension of the caterpillar belt was provided by a hydraulic cylinder.

The design of the tracks, made of cast tracks, with lantern gears, provided excellent strength and reliability. For use on waterlogged and weak soils, it was possible to equip it with links of increased width, which made it possible to reduce the pressure on the ground.

The rotation of the platform was ensured by a three-stage gearbox, a rotary gear and a hydraulic motor. The spool distribution blocks were located behind the cabin.

Cabin

From a modern point of view, the operator's cabin has a minimal set of amenities, but for its time it was progressive. The developers took care of high-quality ventilation and heating, equipped the cabin with excellent heat and sound insulation, as well as a soft, adjustable seat. Absorption of vibrations and shocks was ensured by rubber shock absorbers.

The excavator looks quite unusual - in order to balance the cabin on the turntable, it was necessary to position it as far as possible from the engine. This provided the excavator with stability and additional force on the bucket.

Hydraulic system

The hydraulic drive of the working bodies has long been the pride of the developers - the figure of 250 kg/cm was a record for both the Soviet Union and Europe. Structurally, the drive consisted of a double pump, distribution and safety equipment and working parts. The hydraulic pumps were installed in a single housing and operated from a diesel engine through a gearbox. The valve spool distribution blocks were mounted behind the cab.

Not available:

Excavator Kovrovets EO-4225A-07 technical characteristics

The Kovrovets EO-4225A-07 crawler excavator was manufactured by OJSC Kovrovets Excavator Plant. This enterprise is one of the largest in the Russian Federation in production

earthmoving equipment. The share of excavators manufactured by the enterprise is 30% of production in the Russian Federation. Its design capacity is designed to produce 1 thousand excavators per year. Excavator Kovrovets EO-4225A-07 technical characteristics:

• Dimensions: length of equipment for transportation 10250 mm;
• height of equipment for transportation 3300 mm;
• roof height 3000 mm;
• base 3700 mm;
• chassis length 4560 mm;
• track width 600 mm/750 mm/900 mm;
• chassis width 3000 mm/3150 mm/3600 mm;
• clearance under the running gear 460 mm;
• radius of the rear part of the platform 3280 mm;
• clearance under the platform 1100 mm;
• track 2400 mm;
• platform width 3000 mm;
• track height 990 mm.

Engine:

• type - diesel;

manufacturer YaMZ; model 238GM2; power 170 l. With. or 125 kW. Operating weight 26450 kg. Voltage in the lighting network is 24 V. Hydraulic system:

• pressure in the stroke drive 25 MPa;

platform drive pressure 22 MPa; pressure in the equipment drive is 28 MPa; productivity 2x200 l/min. Movement speed:

• low 1.7 km/h;

high 4.2 km/h. Traction force 21 tf. The surmountable incline is 35 degrees. The number of platform revolutions per minute is 9.1. Pressure on the supporting surface:

• 0.55 kg/cm2 with a track width of 600 mm;

0.44 kg/cm2 with a track width of 750 mm; 0.38 kg/cm2 with a track width of 900 mm.

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Excavator Kovrovets EO-4225A-07 technical characteristics of the equipment used:

• Bucket capacity 0.6-1.42 m3.
• Characteristics with a handle length of 2900 mm: shipping height 5150 mm;
• digging height 7700 mm;
• digging depth 6000 mm;
• digging radius 9300 mm.

Characteristics with a handle length of 4360 mm:

• shipping height 5400 mm;

digging height 7000 mm; digging depth 7300 mm; digging radius 10300 mm.

This excavator has been produced since 1999. It is intended for digging and filling holes, channels, pits, trenches, as well as loading soil.

The Kovrovets EO-4225A-07 crawler excavator is characterized by the following advantages:

• high level of productivity;
• large glass area of ​​the operator's cabin, providing good visibility of the working area;
• long period of operation;
• ease of control;
• reliability, safety;
• comfort of the workplace;
• maintainability, ease of maintenance.

Excavator technical characteristics in numbers

• Operating weight – 26.45 tons;
• Track base – 3.7 m;
• The length of the caterpillar device is 4.56 m;
• The length of the excavator in transport position is 10.25 m;
• The width of the turntable is 3 m;
• Height to roof – 3 m; maximum height with the handle raised is 7.7 m.
• The track width of the tracked undercarriage is 2.4 m;
• Ground clearance under the turntable is 1.1 m.
• The radius of rotation of the rear part of the turntable is 3.28 m.
• The specific pressure of the equipment on the ground is O.Z8 - O.444 - O.55 km/sq.cm (depending on the width of the track: 60 cm - 75 cm - 90 cm.
• The rated voltage of the on-board electrical network (DC) is 24 Volts.
• Rechargeable batteries – 2x6 CT-19O.
• Traction force – 21 tf.
• Bucket capacity - from O.6 to 1.42 cubic meters.
• Hydraulic system (hydraulic pump ZZZ.4.112): the highest pressure - working equipment drive 28 MPa (280 kgf/cm2), travel drive 25 MPa (250 kgf/cm2), platform drive 22 MPa (220 kgf/cm2).
• Maximum traction force on tracks: 21O kN (21.0 tf).
• Movement speed – 1.7 km/h (I); 4.2 km/h (II).
• The angular speed of the turntable is 9.1 rpm (0.95 rad/s).
• The maximum surmountable slope on dry soil is 35 degrees.
• Working area with handle – 2.9 m / 4.36 m.
• The maximum digging radius at the parking level is 9.3 m / 10.3 m.
• Maximum kinematic digging depth – 6 m / 7.3 m.
• The highest digging height is 7.0 m / 7.7 m.
• Maximum unloading height – 5.15 m / 5.4 m.
• The duration of the excavator's operating cycle is 9 seconds.

The main purpose of the excavator is to carry out excavation work to open up layers of open deposits, arrange construction pits and trenches for various purposes, and transfer materials with a lump fraction of up to 400 mm. It is possible to replace the bucket with a clamshell grab, an electromagnetic metal grabbing device and other attachments.

Recommendations regarding the purchase of special equipment

Active use of an excavator affects the condition of the mechanisms and individual units (power plants, hydraulic system).

The purchase of a used model should be made only after carefully studying the condition of the vehicle and the possibility of its long-term operation in the future.

It is advisable to buy EO-4225 from the factory for agricultural or construction work. The new equipment will withstand loads firmly and without problems. Will not require large investments for repairs for 2 or more years of use. The only mandatory conditions are timely diagnosis and installation of new consumables. Proper maintenance will keep the model in pristine condition for many years.

Modifications "EO-3322"

All working operations of the excavator and its movement are carried out using a hydraulic drive system, the dual pump of which rotates from the main diesel engine. SMD. The excavator can work with buckets with a volume of 0.4 to 0.8 cubic meters, depending on the soil category.

The basic model of the EO-3322A excavator received further development in the following modifications: EO-3322B and EO-3322B-1 (with servo drive); "EO-3322V" (with a semi-automatic control system, which allows you to mechanize the cleaning of the bottom of the excavation structure being developed to the design level, "EO-3322E" and "EO-3322I".

Specifications

Technical characteristics of EO 4225EO are designed with a safety margin for heavy excavation work. A detailed description of the model is presented in the instruction manual that comes with each machine. If lost, you can easily find it or download it from the Internet.

Main parameters:

1. Weight - 26450 kg.
2. Bucket volume - 0.6-1.42 cubic meters.
3. Travel speed 4.2 km/h.
4. Traction force - 210 kN.
5. Travel speed - 4.2 km/h.
6. Platform rotation speed - 9.1 rpm.
7. The maximum climbable grade is 35°.

The EO 4225 excavator has several modifications. Dimensions:

• length - 10250 mm;
• width (along the turntable) - 3000 mm;
• height - 3000 mm (transport - 3300 mm).

Digging radius - 10.3 m. Digging depth - 7.3 m. Digging height - 7 m. Unloading height - 5.4 m.

Engine

All excavators of the Kovrov plant were equipped with a YaMZ-238 GM2 engine with direct fuel injection without turbocharging. This is a reliable motor from the Yaroslavl Motor Plant, installed on a wide range of special equipment. Equipped with a pre-heater to facilitate starting at low temperatures.

Engine - YaMZ-238 GM2:

• volume - 14.86 l;
• power - 170 hp / 125 kW;
• fuel - diesel;
• number of cylinders - 8;
• cylinder arrangement - V-shaped;
• type - 4-stroke;
• cooling - liquid;
• fuel consumption - from 220 g/kWh / 162 g/l.h.

Chassis

The design is based on a tracked carriage on several supporting elements, supplemented by a track tensioning mechanism. This is a simple and reliable system with a long service life and minimal risk of breakdowns. The tension mechanism units are reliably sealed with high quality seals. This made it possible to achieve maximum stability and softness of the machine.

The running system of the E0-4225 excavator is a ten-roller balancing system. The crawler track provides stability on soft soils and excellent cross-country ability. The platform is equipped with a planetary rotation mechanism. Planetary gearboxes have increased reliability and provide trouble-free operation for many years.

Steering

The excavator is controlled from the cab using levers or joysticks. The controls allow you to effectively control the speed and trajectory of the machine, connect various attachments and perform precise manipulations.

Hydraulic system

The hydraulic system drives all the main working elements of the machine. It is powered by a diesel engine. The system is equipped with an automatic switch-on function and is capable of pumping up to 400 l/min. The working pressure in the hydraulic system is 28 MPa, the hydraulic fluid flow rate is about 2x200 l/min. The condition of both the hydraulic system and the engine is monitored using a microprocessor system.

Operator's cabin

The excavator is equipped with a new, convenient lifting cabin of improved design. The operator's workplace has become significantly more comfortable compared to previous models. This was facilitated by a number of improvements. Firstly, the glazing area was increased. This provided the operator with an excellent overview of the work area. Secondly, the controls (levers, joysticks, pedals) are located ergonomically, making it as easy as possible to operate the machine. Thirdly, control of equipment systems is easier - for this purpose, there is an electronic control panel in the cabin. In addition, the cabin has a comfortable adjustable seat, an efficient heating system and optional air conditioning.

Device

EO-4225 is distinguished by improved performance characteristics, which are provided by a microprocessor system that allows monitoring the condition of the diesel unit and hydraulic system, planetary rotation and travel gearboxes of the platform with increased reliability, a pre-start heater and systems that maintain a minimum level of vibration and noise.

The design of the equipment uses a multi-support caterpillar bogie with supporting elements supplemented by a caterpillar belt tensioning mechanism. High-quality seals provide maximum sealing of the tension mechanism components. This ensures smooth running and reliable operation of the excavator.

The excavator is used to perform specialized work on loading docks. Well-developed kinematics and hydraulic system and a powerful motor ensure high performance of the equipment. Thoughtful design makes the model more durable. Excellent load capacity is achieved through proper weight distribution.

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The movement of equipment and its elements is carried out through a hydraulic system. The hydraulic drive is powered exclusively by a diesel engine. At the same time, the hydraulic system is equipped with an auto-on function.

Among the features of EO-4225 it is worth highlighting:

• reliable planetary gearboxes;
• filters characterized by an increased degree of filtration of the working fluid;
• low noise level in the cabin;
• reliable RVD from the foreign brand “Fadip”;
• microprocessor system for monitoring the status of diesel and hydraulic system parameters;
• presence of a pre-heater;
• convenient hood layout, facilitating access to the hydraulic system and engine for their maintenance;
• large fuel tank;
• presence of safety and distribution valves;
• new auxiliary systems.

The excavator is equipped with a new comfortable lifting cabin of improved design. This element meets the latest ergonomic requirements. The driver's workplace is not inferior to world analogues. An electronic control panel installed in the cabin allows you to control the operation of equipment systems.

Optionally, a lot of additional equipment is installed on the excavator, which significantly expands its functionality. In general, the EO-4225 proves to be a very reliable and productive piece of equipment.

Price of new and used EO-4225

A used excavator of this model, produced in 2006-2007, will cost 1-1.5 million rubles, depending on condition.

The cost of renting EO-4225 for one machine shift will be about 9,500-10,000 rubles.

Analogs

An analogue of this excavator is the ET-26 model, which has similar technical parameters and dimensions.

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Crawler excavator EO-4225A-07

designed for the development of soils of categories 1-4 and pre-loosened rocky and frozen soils of categories 5-6, as well as for loading soil and bulk materials. At the request of the client, the EO-4225A-07 crawler excavator is equipped with replaceable working equipment: a loader, a ripper, a hydraulic hammer, a grab, hydraulic shears, working equipment for reclamation work, and pincer-type equipment with a three-tooth ripper.

Crawler excavator EO-4225A-071

used for developing quarries, digging pits, trenches, for loading soil and bulk materials, cleaning channels, as well as for destroying reinforced concrete and metal structures. Used in construction and oil and gas industries. Excavators have acquired improved characteristics: reliable planetary gearboxes for travel and rotation of the platform; microprocessor system for monitoring the status of hydraulic system and diesel parameters; filters with increased accuracy of filtration of working fluid; reduced noise and vibration levels; preheater. The excavator can be equipped with various types of replaceable working equipment.

Backhoe loader EO-4225A-061

designed to perform special work (loading and unloading into gondola cars, etc.) at loading areas. High performance is achieved through the use of a powerful engine and proven hydraulic system and kinematics, excellent load capacity due to good weight distribution, and time-tested durability due to a powerful design. The infinitely adjustable cabin with all-round glass design provides the operator with good visibility. The excavator is equipped with a log grab or a multi-jaw scrap metal grab.

Modification

The excavator was produced in the following versions:

• an early version of the car was designated 4225;
• carried out in the mid-90s. modernization led to the appearance of version 4225A;
• a few years later, the excavator underwent further improvements, which led to a change in the index to 4225A-07.

The basic model produced differs in the installed equipment:

• soil loader;
• gripping and pincer working mechanism with an additional 3-tooth ripper;
• grab equipment;
• multi-jaw grab mechanism;
• shears with hydraulic drive of working elements;
• hydraulic hammer;
• soil ripper.

Description of the technique

The device is a powerful earth-moving equipment equipped with 1 bucket, capable of successfully moving soil over a wide temperature range. Thanks to its simple and reliable design, the unit has a long service life and is easy to maintain. One of the main reasons for the popularity of this special tool is its excellent technical characteristics. The EO 4225 excavator can be used to develop soils from categories 1 to 4 without preliminary preparation, or to move soils of categories 5-6 provided they are warmed up.

The universal design allows the excavator to be used in various fields of activity - when developing mines, during construction work, as well as for loading bulk materials into trucks for subsequent transportation.

The excavator copes well with many tasks

This model is produced by, which is rightfully considered one of the largest domestic manufacturers of equipment for earthworks. The products of this concern occupy about 30% of the market for all Russian excavators. Considering the characteristic features of 4225, it is advisable to mention:

• the presence of a pre-start motor, facilitating engine starting at sub-zero temperatures;
• a redesigned electronic unit allows you to adjust the heating intensity, as well as make operating the unit more comfortable;
• a wide selection of working parts/handles for the excavator expands its functionality.

Separately, we should mention the affordable cost of EO 4255, its maintainability, as well as low prices for spare parts. This allows you to troubleshoot problems yourself, if necessary, by purchasing spare parts, which reduces maintenance costs.

Modifications

This excavator was produced by the manufacturer in various versions, which differed not only in design features, but also in performance characteristics. The basic model received the standard designation - 4225. The devices, at the request of the customer, could be equipped with various equipment, for example:

• pincer grip;
• soil loader;
• grab, including multi-jaw;
• hydraulic shears;
• hydraulic hammer.

Devices equipped with a soil ripper were also very popular. Subsequently, modification 4225A was released, which differed in the internal structure of some components, as well as EO 4225a 07. The latter currently seems to be the most modern and advanced, which made it incredibly popular among consumers.

Device

If we study the design of such a model in more detail, we can note that its basis is a steel frame, on the sides of which a caterpillar drive is mounted. The excavator has a hydraulic power transmission, and the motor is connected to a piston pump, which allows pumping up to 400 l/min through the system. If desired, you can change this indicator by adjusting the shaft speed.

Driver's cabin of excavator EO 4225

The operator’s workplace deserves special mention, as it has become much more comfortable compared to previous models of the concern. The glass area has been increased, which provides better visibility during work. The controls—joysticks and pedals—are located in such a way as to make operating the excavator as easy as possible. An adjustable chair, heating system and air conditioning, which can be installed upon request, distinguish the device from many domestic analogues.

This is interesting: Modifications and technical characteristics of the EO-4121 excavator

Power hydraulic system - EO-4225A:

1 2 3 4 4 5 6 7 8 9 9 10 11 12 13 14 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 53 54 55 56 56 57 57 57 57 58 59 60 61 62 62 62 62 63 63 63 64 65 66 66 66 67 68 69 70 70 70 70 70 70 71 72 73 74 75 76 76 76 76 76 76 76 76 76 77 78 79 80 81 82 83 84 85 86 87 88 89 89 89 89 90 91 92 93 94 95 96 97 98 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112

List of components from Power hydraulic system for EO-4225A

Parts diagrams are for reference purposes only! We do not sell all spare parts from the hydraulic power system for EO-4225A presented in this list. If there is a “Show prices” link in the right column, these spare parts from “Power Hydraulic System” are on sale. Availability in warehouses for details and prices, see the product card. If there is no “Show cost” link in the right column, we do not sell such parts and do not accept orders for them.

Excavator EO-4225

EO-4225 is a full-rotary hydraulic universal excavator with crawler tracks. The equipment is intended for the development of soils belonging to categories I-IV and having a debris size of up to 400 mm. The excavator is actively used in the development of open mines, pits, trenches and when loading bulk materials.

The production of EO-4225 is carried out by an excavator. The company is considered one of the largest domestic manufacturers of earthmoving equipment. The plant has a 30% share in the total production of equipment among Russian brands, producing up to 1,000 units of excavators annually.

EO-4225 has undergone major modernization several times. In 1995, he introduced the EO-4225A series, which received significant changes. The model turned out to be very successful and received several awards at international exhibitions.

In 1999, production of the EO-4225A-07 modification began, differing from its predecessors in improved technical parameters and a modified design. Currently, it produces this particular model, offering nine different types of attachments for it.

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The company also carries out repairs and maintenance of its products.

The innovations applied in the EO-4225 model allowed it to capture the “large excavator” market for a long time. The presence of a pre-heater ensured uninterrupted operation of the engine at temperatures from -40 to +40 degrees. An advanced electronic unit that regulates heating and operating parameters of the motor and hydraulic system makes it easier to control the equipment.

Various working parts and handles were installed on the excavator:

• grab grip designed for working with long lengths, pipes and logs;
• multi-jaw grab for metal objects;
• grab for bulk materials;
• electromagnetic system for scrap metal, supplemented with a magnetic plate (washer).

The excavator itself had the following advantages:

1. large glass area, which provided excellent visibility of the work area;
2. ease of operation;
3. high work comfort;
4. increased productivity compared to analogues;
5. long service life of elements and components;
6. safety, reliability;
7. ease of maintenance and repairability.

Among the various modifications of the excavator, the loading model EO-4225-06 with a lifting cabin was especially popular. It was intended for transshipment operations when using freight transport and railway gondola cars. Optionally, the equipment was equipped with additional equipment of imported and domestic production.

Despite its rather large dimensions, the EO-4225 is not at all a stationary equipment. The excavator is capable of moving at a speed of 1.7-4.2 km/h and overcoming a slope of 35%.

• operating weight – 26500 kg;
• track base – 3700 mm;
• track length – 4560 mm;
• length in transport position – 10250 mm;
• turntable width – 3000 mm;
• height to roof – 3000 mm;
• track track - 2400 mm;
• ground clearance under the turntable – 1100 mm.

The specific pressure exerted by the equipment on the ground is 0.38-0.55 km/sq.cm. The maximum height of EO-4225 is 7700 mm, unloading height is 5150 mm. The largest digging radius is 9300 mm. The excavator has a traction force of 21 tf. The equipment bucket holds 1.42 cubic meters of cargo.

Fuel consumption

The minimum fuel consumption of the model is 206 (152) g/kW per hour (g/hp per hour). The excavator's fuel tank holds 270 liters of fuel, allowing it to work for a long time without refueling.

Price of new and used EO-4225

A used excavator of this model, produced in 2006-2007, will cost 1-1.5 million rubles, depending on condition.

The cost of renting EO-4225 for one machine shift will be about 9,500-10,000 rubles.

Reviews about excavators E0-4225

The majority of operators and operators of excavators of this model speak positively about them - as tough and durable earthmoving machines that can work for a long time in the most difficult conditions. The design of the base chassis is characterized by low impact on the ground. Even with a minimum track width of 60 cm, this allows the excavator to be used even on complex and viscous soils. This is facilitated by both high ground clearance and an impressive movement angle of 35º.

The functioning of the working mechanisms is ensured by a hydraulic system using a reinforced hydraulic hose and driven by a power unit. The maximum unloading height of 5.15 m is quite sufficient for loading operations in conjunction with most models of trucks or railway cars.

The cabin of the E0-4225 excavator is safe, well heat- and sound-insulated, with good visibility, equipped with a powerful heater, and, upon additional request, air conditioning. The operator's cabin is located on the same platform as the equipment. The workplace is equipped with a modern and comfortable chair that can be adjusted.

The excavator is widely used for digging trenches and pits; it can also be used for cleaning ponds and reservoirs. Thanks to the large track width, this equipment is able to move freely on swampy or loose soil.

Experienced operators of E0-4225 excavators talk about the following typical malfunctions of these special vehicles. When the excavator moves, its platform may spontaneously turn. If at the same time the boom hydraulics had to be engaged, the rotation speed would slow down. The cause of the breakdown lies in the working fluid distributor, inside of which the springs and spools wear out. After replacing these parts, the functionality of the excavator is restored.

Occasionally, problems arise with the operation of the power unit, which stalls when a load is applied. The cause of this malfunction is a clogged filter. To continue operation without repairs, it was necessary to supply diesel fuel directly - from a canister to the booster pump of the high-pressure fuel pump.

After the end of production of EO-4225 and the closure of the Kovrov Excavator Plant, experts do not recommend purchasing special vehicles of this model on the secondary market: there is a high probability that it will be difficult to find spare parts. But in the end, it all depends on the price and technical condition of a particular excavator.