Excavator EO-3323 - technical characteristics and design

The EO 3323 excavator is a domestically produced equipment, the main plant of which is located in the city of Tver. Production of this model began in 1988 and was discontinued in 2001. During this period of time, the excavator has achieved high popularity and prevalence throughout the country. This was facilitated by the presence of a large number of positive features.

Excavator device

The special equipment is the first excavator from hydraulic machines of the third size group of the 2nd generation.

Excavator EO-3323A - general view drawing

The EO-3323 excavator chassis is a durable welded frame. Special equipment is characterized by high cross-country ability, which is determined by the 4x4 wheel formula (front wheels are single, rear wheels are double). The hydraulic drive greatly simplifies machine control.

Stability during work is ensured by folding supports, which are installed in the rear compartment of the platform. Additional support is provided by a straight blade located in front.

The excavator has pneumatic wheels. Full rotation of the platform is performed by a rotating mechanism using a hydraulic drive having a two-stage planetary gearbox.

Cabin equipment

The special equipment is equipped with a cabin with two reinforced vertical front pillars. It is equipped with the following elements:

Cabin of excavator EO-3323

control devices;
control panels;
heating system;
wiper;
sun visor;
shock-absorbing chair, adjustable vertically and horizontally.

Also included in the package: first aid kit, fire extinguisher, thermos.

Design features

The main elements of an excavator include a platform on pneumatic wheels, a working body and a driver’s cabin. All equipment is capable of rotating on the platform at full speed. This allows you to increase the productivity of the equipment and make it multifunctional. The rotation of the structure is carried out due to the installed hydraulic drive.

Photo of excavator EO 3323

The chassis of the EO 3323 wheeled excavator is a welded frame made of durable steel with a 4x4 wheel arrangement. This ensures high maneuverability of the equipment. The front axle acts as control. Two rear supports and a front blade are also installed here. All elements give the excavator sufficient stability during excavation work.

The driver's cabin is a reinforced structure. To do this, there are two strong vertical posts in its front part. There is a panel with a full set of sensors and monitoring devices for the engine and equipment. A hydraulic drive helps control the excavator, and the steering wheel has the shape of a circle.

A useful function of the model is a sensor that reacts to the displacement of the working equipment at the moment of free movement of the equipment or its towing.

This increases safety and protects parts from unexpected damage.

Advantages of special equipment

Advantages that characterize special equipment:

reliability in operation;
ease of control;
vibration protection;
extreme precision with which the hydraulic system performs its tasks;
good visibility, determined by a large glass area and mirrors that provide viewing of “dead” zones;
stability during work, ensured by two pairs of supports;
ability to tow at a speed of 50 km/h;
ease of maintenance, availability of spare parts.

The EO-3323 excavator is quite unpretentious to climatic conditions. Special equipment can be operated in the temperature range from -40 to +40 degrees. The manufacturer guarantees at least 8 thousand operating hours before the first major overhaul.

The safety of equipment and the operator is ensured using an installed sensor that reacts to equipment displacement when moving the machine (either independently or using a tug).

Negative aspects include fairly high fuel consumption (especially when moving special equipment between sites) and a low level of comfort in the operator’s cab. Due to the increased consumption of diesel fuel, towing is most often used to transport equipment.

Features of the EO 3323 excavator

The main positive quality of this model is its durability. Many pieces of equipment are still functioning normally. At the time of manufacture, the developers guaranteed 8,000 hours of operation without major repairs, but in reality this figure is even noticeably higher. On average, the service life of an excavator is 11-14 thousand hours.

The advantages also include the following:

Easy to operate and operate. Control of attachments is as simplified as possible, and easy access to all parts of the excavator allows repair work to be carried out very quickly and inexpensively;
Precision hydraulic system. This allows you to increase the efficiency of working equipment and the safety of all actions;
Vibration protection. For this purpose, a special driver's seat is provided, which is equipped with shock absorbers. Suppression of vibrations allows you to create more comfortable working conditions.

The disadvantages of the EO 3323 excavator include the lack of air conditioning and an air purification system.

Also, many owners note quite high fuel consumption when moving between objects.

Technical characteristics of the Kalininets excavator

The Kalininets excavator model is characterized by the following parameters:

power unit: D-240;
engine power: 75 l. With.;
travel speed (max): 19.4 km/h;
tire type: 12,0–20;
weight of equipment: 14 tons;
duration of one working cycle: 16 s.

Description of engine, transmission and hydraulics

Design of the D-240 engine power supply system
The EO-3323 excavator is equipped with a four-cylinder diesel engine D-240, which is located on the right side of the turntable. Previously, special equipment was actively equipped with such a unit, and it is still used today.

The engine is started in the following sequence: first, the launcher is started by an electric drive, then, by means of a friction clutch, the engine itself is started. This system allows you to start the engine even in harsh climates.

The engine cylinders have a diameter of 110 mm, the piston stroke is 125 mm. Engine capacity – 4749 mm3.

There is also a model of earth-moving equipment equipped with a D-75P1 engine, which can be launched without using a launcher. The engine power did not change. This version of the machine is designed for moderate climates.

Motor D-75P1 - device

During the production process of the machine, a more powerful modification 3323A was developed, which was equipped with a modern D-243 engine with a power of 82 hp. With.

Motor D243 at different angles

The hydraulic system contributes to the high productivity of the single-bucket unit. It is characterized by a maximum pressure of 28 MPa and a pump speed of 60 l/min.

Hydraulic system of the EO-3322 excavator

The transmission is driven by a hydraulic motor (via a two-stage gearbox and a driveshaft) to the rear and front axles. Shoe brakes are controlled using a pneumatic system.

EO-3322 excavator platform rotation mechanism

Technical indicators

The power and performance of any equipment consists of several criteria. Let's take a closer look at the EO 3323 device.

Engine. Two types of engines were developed for the EO 3323 excavator: D-240 and D-75 P1. The latest unit was designed specifically for operation in temperate climate zones. The diesel engine is started using an electric starter directly. D-240 can operate in harsh conditions. The launch of this power plant model is carried out in stages. First the pre-start installation, then the main unit. This approach ensures uninterrupted starting of the machine even in sub-zero temperatures. To maintain the balance of the equipment, the engine is located at the rear of the platform and shifted to the right.

Chassis. The special vehicle is based on an all-metal welded frame on which four proportional wheels are located. The front axle is driven. To ensure better cross-country ability and maneuverability of the vehicle, a 4x4 wheel arrangement was used. The frame is equipped with rear power supports and a bulldozer blade. The use of these elements provides the machine with better stability during long boom reach or deep excavation.

Workplace. The excavator cabin is made in the form of an all-metal structure, reinforced with front safety pillars. Inside there is a driver's seat, a dashboard and a steering wheel. By the way, for ease of control, the model has power steering.

The basic package does not include heating and air conditioning systems. They must be purchased at an additional cost or installed yourself.

Specifications:

Dimensions	7 550/2 500/3 700 mm
Structural weight	14,000 kg
Power	75 hp
Transport speed	19.5 km/h
Mining depth: forward/backhoe	7.6/5.4 m
Working radius: forward/backhoe	6.7/8.5 m
Maximum boom reach	About 4 m
Applied operating force	100 kN

Dimensions of the machine, capabilities when working with a front and back shovel

The EO-3323 excavator has the following dimensions:

length: 7.55 m;
width: 2.5 m;
height: 3.7 m.

Characteristics when working with a front and back shovel:

Parameter	straight shovel	Backhoe
Bucket volume, which is equipped with special equipment, m3	0.63 or 1.2	0,5 — 0,8
Maximum force when cutting soil, kN	100	100
Operating radius (max), m	6,78	8,5
Height (max) when digging, m	7,66
Depth (max) of excavation, m	5,4
Height (max) of unloading, m	4,2	4,9

Areas of application of special equipment

The EO-3323 excavator is used in the construction of objects for various purposes, roads, in the mining industry during the development of deposits and quarries, and in public utilities. Work can be performed both in rural areas and in urban areas.

Special equipment is used for:

digging pits and trenches;
carrying out loading and unloading of various bulk materials and soil;
the need to create embankments;
cleaning and leveling the territory;
dismantling of structures;
backfilling holes;
moving goods.

The excavator is capable of working with soils having the first, second, third and fourth density categories, without initial loosening.

Peculiarities

EO 3323 is a classic type of single-bucket excavator. The operator's workplace and equipment are located on a platform that can rotate 360 degrees around its axis. Tverskoy Excavator took part in the work on the creation of the machine.

Thanks to this, special equipment is distinguished by the accuracy of the hydraulic system and the reliability of the main components and mechanisms. The lifespan of the machine declared by the manufacturer, without undergoing major repairs, is 8,000 hours worked. In practice, this figure is almost doubled.

The basic package includes a monoblock boom and a 0.6 cubic meter bucket. meters. At the request of the customer, the capacity of the bucket can be increased to 0.8 cubic meters. meters. Special equipment can work with soils of 1-4 levels of complexity.

For a long time, EO 3323 had no analogues in its class of construction equipment!

Types of attachments that special equipment is equipped with

To expand the scope of application of the EO-3323 excavator, it can be equipped with the following additional equipment:

Straight front blade. It is designed for leveling sites and clearing them of construction waste.
Grab bucket. It is used along with earthmoving equipment and is basic equipment.
Ripper. This tool makes digging in dense rocks easier.
Hydraulic concrete breaker. The tool is designed for dismantling buildings made of concrete.
Hydraulic hammer. The installation is used for demolition of structures and construction of roads.
Hydraulic shears. The equipment is used for dismantling reinforced concrete structures.
Drilling equipment. Used for constructing wells of various sizes.
Hook, pitchfork. Devices for lifting and loading operations.
Vibrating plate. The product is necessary for soil compaction and foundation construction.

The EO-3323 excavator is characterized by excellent performance, long service life and an affordable price. Today, used models can be purchased at prices ranging from 150 to 400 thousand rubles. The cost depends on the condition in which the special equipment is located.