Chetra T-20 bulldozer – description and properties

Cheetra T-20 crawler bulldozer

The Cheetra T 20 categorizes itself as a top class 20 heavy-duty bulldozer. The machine is indispensable for large amounts of work in rock excavation and construction. The model demonstrates high productivity and efficiency, which is due to the use of advanced technology and solutions in design.

The manufacturer is Chuvash company “Promtractor”. The model is part of a new product line of the company, which was introduced in the early 2000s. In 2006, the device received a certificate of conformity with the standards of the European Union (TÜV Rheinland Inter Cert). In addition to its high performance, the Chetra T 20 features an interesting design with a combination of the company’s signature colors: purple and yellow. Such a range of colors allows you to use the bulldozer in snowy terrain or in the woods.

The Chera T 20 has been designed for operations requiring increased productivity. The unit can be used in temperatures from t-50 to +45 degrees Celsius, extending the range of applications. Versatility and high productivity ensure a steady demand for this model.

The main stations Chera T 20:

• Protocol work;
• Earthworks (loosening, mixing and moving from the ground for short distances);
• Men at work;
• Mining (fuel and energy companies, gold and diamond mining, geological exploration);
• Development of floors of any complexity, including frozen and rocky soils.

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Modifications and functions

Cheetra T 20 is offered in several modifications, which allows you to choose the best option for certain operating conditions. The design of the different dozer versions is very similar, the only differences being the engine (cummins or yamz), the type of equipment (straight, spherical or semi-spherical blade) and the track width (basic version and version with a wide track).

Chitra T 20 competes with foreign bulldozers Caterpillar, Komatsu and Chinese models. In terms of price/quality ratio the equipment shows the best combination. Additional advantages of the CHETRA T 20 are:

1. Quality and reliability of materials. Rubber parts, steel parts, electronics and other bulldozer mechanisms can withstand abnormal temperatures, which is very important because the machine is usually used hundreds of kilometers away from repair shops in harsh conditions and leads to downtime with significant costs.
2. Ease of operation. Inexpensive spare parts and simple design allow you to quickly learn how to use the bulldozer and wait for it;
3. economy. The cost of the Chera T 20 remains one of the lowest in the segment;
4. Versatility. The machine can work with different blades and rippers, which saves the company time;
5. Comfort. Heating, ventilation, soundproofing upholstery and the ability to install air conditioning make the work of the driver as pleasant as possible.

Technical characteristics

The dimensions:

• Length – 4605 mm;
• Width – 2696 mm;
• Height – 3885 mm;
• Floor clearance – 540 mm;
• Width of space – 560 (standard version) or 710 (complaint version).

Operating weight of the machine – 33250 kg (with the fishing device – 34220 kg). Specific pressure on the floor – 0.97 kgf/m² (sting – 0.71 kgf/m²). Bulldozer can move forward with a maximum speed of 11.1 km / h – with a maximum speed of 14.2 km / h.

Design and operating functions

The Chetra T 20 has a standard layout for all Proltor products. The model is based on a modular design of systems and components, which ensures easy installation, replacement and maintenance. This system reduces costs and speeds up the payback period of the bulldozer.

The main elements of the Tsira T 20:

1. chassis. The basis of the architecture of the model is a 3-point semi-spherical suspension with a crumple axle. This provides excellent traction and grip. The chassis contains a fixed bogie frame with 3 rollers on rubber shock absorbers. Each bogie has support rollers, which are mounted on a crankshaft lever mounted on the frame. The bogie frame rotates relative to the axle, and shock loads are not transmitted to the body, which increases the comfort of work. The tracks are a prefabricated structure with a floor and seal, which is fixed by liquid grease in the hinge. Track tension is adjusted with a grease syringe.

Undercarriage properties:

• Number of support rollers – 7 (on each side);
• Number of support rollers – 2 (each side);
• Number of shoes – 40 (each side);
• Shoe width – 560 mm;
• Total track surface area – 3,44 m²;
• Link – 228,6 mm.

2. Hydromechanical transmission. The Chilera T 20 features an advanced transmission with 3 forward and 3 reverse gears. Coordinating transmission and main gear is a single structure in the rear axle bore. The planetary gear shifts under load and is characterized by high torque transmission. Another important element of the transmission is the torque converter (3-element, 1-speed), which is connected to the gearbox via a spline coupling. Speed selection is made with a lever in the cab.

3. Hydraulic system of individual controls. It contains the following elements:

• David Brown S1A6155 equipment pump with 235 l/min capacity;
• Safety valve;
• 5-section distributor;
• Welding hydraulics tank with a capacity of 130 liters.

The maximum pressure in the system is 20 MPa.

The TY 20 bulldozer cabin is single-seat and mounted on rubber shock absorbers. Special double windows with washer and wipers prevent the formation of ice and dust on the glass, which improves visibility. Comfortable working conditions are achieved due to the heater, large glazing area, ventilation system and modern noise-absorbing upholstery. The cab is equipped with autonomous heating, which runs on diesel fuel. In addition, the installation of air conditioning is offered. Some versions are equipped with mini-bars for refrigeration, food, drinks and water.

Chera T 20 is versatility. The bulldozer is used with a variety of special devices.

Types of bulldozer devices:

1. Hemispherical blade:

• Length – 3976 mm;
• Width – 1875 mm;
• Capacity – 10.8 cubic meters;
• Weight – 3940 kg;
• Maximum height of the lion – 1250 mm;
• The maximum depth – 580 mm;
• Maximum curvature – 15 degrees.

2. Spherical blade:

• Length – 4270 mm;
• Width – 1920 mm;
• Capacity – 11.7 cubic meters;
• Weight – 4430 kg;
• Maximum height of the lion – 1250 mm;
• The maximum depth – 580 mm;
• Maximum slope – 13 degrees.

3. straight blade:

• Length – 4378 mm;
• Width – 1673 mm;
• Capacity – 8.5 cubic meters.

4. Coal ditches:

• Length – 4270 mm;
• Width – 1920 mm;
• Capacity – 15 cubic meters.

Other equipment:

• Single-tooth ripper;
• Three- toothed ripper;
• Winches with a pull force up to 30 tons.

engine

There are 2 engine options for the Chera T 20 bulldozer:

1. YAMZ 238-DE2-28 (Yaroslavl Motor Plant) – V-type 4-stroke diesel engine with liquid cooling, charge air cooling in the air-air heat exchanger and turbocharging. Characteristic features of the engine are its simple design, high performance and availability.

Properties of YaMZ 238-DE2-28:

• Working volume – 14.86 liters;
• Rated power – 228 (310) kW (PS);
• Rated speed – 2100 rpm;
• Maximum torque – 1247 Nm;
• Compression Ratio – 16.5;
• Number of cylinders – 8;
• Cylinder Diameter – 130 mm;
• Specific fuel consumption – 195 (143) g/kWh (g/hp).

2. Cummins QSM 11-C330 engine – 4-stroke air-air-cooled, liquid-cooled, turbocharged serial engine. The unit is completed with the Bosch + Quantum system, which includes electronic mechanisms for control, protection, engine diagnostics and fuel injection. The power unit meets modern environmental requirements and has a long service life.

Properties of the Cummins QSM 11-C330 unit:

• Displacement – 10.8 liters;
• Rated power – 246 (335) kW (PS);
• Rated speed – 2100 rpm;
• Maximum torque – 1458 Nm;
• Number of cylinders – 6;
• Cylinder diameter – 125 mm;
• Specific fuel consumption – 195 (143) g/kWh (g/hp).

The bulldozer is equipped with a 400-liter fuel tank.

The cost of Chetra T 20 bulldozer currently ranges from about 8.8 to 9.3 million rubles.

Used versions are also a profitable purchase, given the high reliability of the machine:

Chera T20: technical characteristics

The Chera T20 belongs to the category of powerful industrial bulldozers of the 20th traction class. This machine is indispensable on large working inserts, in rock storage and construction. The bulldozer has high productivity and efficiency, which is due to the use of advanced technology and solutions in the design.

The balanced ratio of traction and traction properties, diesel power and design of the “Nyose Bulldozer” unit provide the Chetra T20 bulldozer with high productivity at low labor costs. This equipment is often used in the domestic mining industry, fuel and energy complex, exploration, forestry and construction industries.

Scope and manufacturer

The main consumers of this equipment are enterprises of gold and diamond mining industry, fuel and energy complex, exploration, forestry, road sector and construction industry. It is possible to develop soils of any complexity, including, but not limited to frozen and rocky soils.

Cheboksary company “Promtractor” in the capital of the Republic of Chuvashia is the manufacturer of Cheboksary. This model belongs to a series of new products of “Promtractor”, which was first put into production in the 2000s. In 2006, the Cetra T20 bulldozer received a certificate of compliance with the standards of the European Union (TÜV Rheinland Inter Cert).

In addition to its successful properties, the Chetra T20 bulldozer features an interesting and modern design, which combines Promtractor’s signature colors: purple and yellow. Such a range makes the bulldozer more visible from a distance, both on snow-covered areas and in the woods.

The Chetra T20 has been designed for all earthmoving and leveling operations that require increased productivity. This technology can be used in the widest temperature range from t-50 to +45 degrees Celsius. Versatility and high productivity ensure a steady demand for this bulldozer.

The modular structure of all components and systems – gearbox, chassis, working equipment, cooling system, cab and controls – provides ease and comfort in operation and maintenance. When developing the tractor for the Chetra T20 bulldozer, an improved transmission system was used.

Semi-rigid three-point suspension with a remote-controlled bogie pendulum axle and tension wheel with micro feathers provides high traction and reduces shock load on the undercarriage system.

Cheetra T20 Modifications and Features

On the market of construction machines Cheetra T20 is offered in several modifications, which makes it easy for a potential buyer to select the best option for certain operating conditions. Structurally, the various modifications of the bulldozer are as close as possible. The differences lie in the installed engine (domestic YAMZ or imported cummins), the type of used working equipment (it can be straight, spherical or hemispherical blade) and the width of the chains (basic version or modification with wide chains).

The models known as CHETRA T20.02YA and CHETRA T20.02YAM (I-Yaroslavl) are equipped with a diesel engine YAMZ-238de2-28. The models CHETRA T20.02K and CHETRA T20.02km (K – Cummins) are equipped with a Cummins QSM11 engine.

The number of rollers (on each side) on models with the letter M is eight, not seven. And the width of the chain shoe is 710 mm, not 560 mm.

The Chetra T20 bulldozer can successfully compete with foreign bulldozers of the leading figures in the industry, such as Caterpillar, Komatsu; as well as with Chinese models. The price-quality ratio is very good, even an ideal combination.

The main advantages of the Chetra T20 bulldozer include:

• Decent quality and high reliability of the materials from which they are made. The rubber parts, steel elements, electronics and other mechanisms of the bulldozer can withstand abnormal temperatures and all kinds of weather changes. This is an important factor because this special equipment is usually used hundreds of kilometers away from repair sites in harsh conditions and its downtime can lead to significant costs.
• Easy operation and maintenance. Inexpensive spare parts and simple design help you quickly learn the operation and maintenance of this track planer.
• Business. The cost of the bulldozer initially remains the lowest in the segment, including purpose and power.
• Versatility. The T20 T20 bulldozer can work with a variety of dozer blades and rippers, which saves time on operations.
• Company. Powerful, productive furnace, ventilation, low-lying cushion, the possibility of easy installation of air conditioning system make the work of the T20 bulldozer operator as comfortable as possible.

Design and operating functions

The T20 T20 bulldozer has a standard layout, which distinguishes all special equipment produced by the Cheboksary company “Promtractor”. As mentioned above, this model is based on a modular design of systems and components, which ensure easy installation, replacement and maintenance. Such a system reduces costs and accelerates the payback period of the bulldozer.

chassis

The basis of the architecture of this model is a three-stage half-burner suspension with a crushed axle. Due to such a solution, excellent traction qualities of the special equipment are achieved. The chassis includes a robust vehicle frame with three rollers on rubber shock absorbers. Each bogie has support rollers, which are mounted on the frame and fixed to the crankshaft arm.

The bogie frame rotates against the axle, and shock loads are not transferred to the body, which increases working comfort. The tracks are a prefabricated construction, with a floor and seal that eliminates liquid grease in the joint. Track tension is adjusted with a grease syringe.

Chassis properties are as follows:

• Number of support rollers – seven (on each side);
• Number of support rollers – two (on each side);
• Number of shoes – 40 (each side);
• Shoe width – 560 mm;
• Total track surface area – 3,44 sq. m;
• Link pitch – 228.6 mm;
• Ground height – 80 mm;
• Carrying surface area – 3,44 sq. m.
• Floor pressure – 0.86 kgf/cm2.

Support, support drums and guide wheels are equipped with one-way grease for life, with self-lubricating “double cone” type seals. The idler wheel consists of a microde.

The tracks are prefabricated, ground and sealed floor, with liquid grease at the joint. Caterpillar tension is easily adjusted with a syringe of constant grease.

Semi-bent three-point suspension with painted axle Swing bogie provides high traction barrel properties, reduced shock loads on the undercarriage and improved working conditions.

T20 T20 Diesel Engine

Two engine options are available for the T20 Model T20 bulldozer:

• YAMZ 238-DE2-28 from Yaroslavl Power Plant.

This is a four-stroke V8 diesel engine with liquid cooling, charge air cooling in the heat exchanger on the principle of “air-to-air” and a turbocharger. Characteristic features of this engine are simple design, visibility and reliability, high performance and availability.

Power of the engine JAMZ 238-de2-28 (rated) is 243 kW (330 hp) The working power of the engine JAMZ 238-de2-28 is 228 kW (310 hp)

Other characteristics of the diesel engine YAMZ 238-de2-28: Working volume – 14,86 liters; Rated Speed – 2100 rpm; Maximum torque – 1247 N.M; Compression Ratio – 16.5; Cylinder diameter – 130 mm; Piston hub – 140 mm; Specific consumption of diesel fuel – 195 g / kW / hour (143 g / hp).

• Cummins QSM 11-C330 Chinese

This is a four-stroke in series 6-cylinder air-to-air liquid-cooled diesel engine with turbo condensers. This power unit is completed with the Bosch + Kwantum system, which includes electronic control, protection, engine diagnostics and diesel fuel injection mechanisms. The power plant meets the latest environmental requirements and has a long service life.

The Cummins QSM11-Motor (rated) power output is 246 kW (335 hp). The operating drive of the Cummins QSM11 is the same as the Yamz 238-de2-28, viz: 228 kW (310 hp).

Other characteristics of the Cummins QSM 11-C330 diesel engine: Working volume – 10.8 liters; Rated speed – 2100 rpm; Maximum torque – 1458 N.M.; Cylinder diameter – 125 mm; Piston stroke – 147 mm; Specific consumption of diesel fuel is 195 g/kWh (143 g / hp per hour).

The T20 T20 Bulldozer is equipped with a 400-liter fuel tank.

Hydromechanical transmission

The load-switching planetary powershift transmission is a single-stage torque converter with a diameter of 415 mm and a maximum torque ratio of KO=2.9 with oil pump transmission and features high torque capability and offers three forward and three reverse gears. A 3-element, 1-stage torque converter is connected to the engine-mounted elastic coupling by a driveline. To the pinion is a split clutch and mounted on the front wall of the rear axle.

The modulating system allows smooth shifting under load. Manual transmission and direction of travel are handled by a lever. The transmission is structurally combined with the coordinating gear and the main gear into a single-threaded unit, which is mounted in the rear axle opening.

Tractor idle speed in km/h, for forward/reverse gears: i gear – 3,8/5,0; II gear – 6,8 / 8,7; III gear – 10,9 / 13,7.

Hydraulic system separate supplier

The Buldozer T20 hydraulic system includes the following components:

• David Brown model S1A6155 gear pump, which has a capacity of 235 liters per minute at 1,750 rpm;
• object valve;
• A five-section hydraulic distributor, which consists of a valve and four coil sections;
• Welded tank for hydraulic fluid, which is adapted for mechanical cleaning of internal surfaces – capacity 130 liters.

The maximum pressure of the hydraulic system (pressure relief valve) is 20 MPa (200 kgf/cm2).

T20 Bulldozer Cabin

The bulldozer cabin of this model is single-place and mounted on rubber shock absorbers. Special double windows with a washer and wipers prevent formation of ice and dust on the glass, improving the visibility. Caloriferous heating, large glazing area, ventilation system and modern soundproofing gaskets.

The T20 Bulldozer is also equipped with autonomous heating operating on diesel fuel. As an additional option, an air conditioner is offered. Some modifications also offer mini-bars for refrigeration, food, drinks and water.

Cab bulldozers of this model are equipped with frame elements of ROPS-FOPS standards.

Overall dimensions, weight T20 T20

• Length x width x height in mm – 3 976 x 2 696 x 1 875 and 4 378 x 3 010 x 1 673 (for tractors with the letter m without working equipment).
• The minimum length is 530 mm.
• Tractor track is at least 2100 mm (2300 mm – with wide tracks, under tractors with letters m).
• The base is 3070 mm (3560 mm – with wide tracks, for tractors with the letters m).
• Carrying area is 3.44 square meters or 5.06 m².
• Floor pressure is 0.96 kgf/m² cm or 0.69 kgf/m².
• The operating weight (in standard configuration, with full bodywork, + tipper, rear fasteners, machinists) is not more than 35.2 tons.
• Service weight – from 30,7 to 35,2 t.

Operating equipment of the dozer T20 T20

Front dozer equipment:

Straight hemispherical blade with a capacity of 10 or 8.5 m3 with a depth of 590 mm. The lift height above the wing is 1220 mm. Maximum slope adjustment (SCEW) is ± 10 degrees. Weight: 3965 or 5140 kg.

Also available: straight blade (width 4378 mm x height 1673 mm / volume 8.5 cubic meters; spherical blade (width 4270 mm x height 1920 mm / volume 11.7 cubic meters); coal compartment (width 4270 mm x height 2122 mm / volume 15 / volume 15 cubic meters).

The large capacity of the standard stockpiles provides increased productivity. This ensures maximum proximity of the garbage can to the tractor hood and maximum pressure force on the blade of the garbage can during diagonal linkage, when lateral forces are transmitted from the garbage can to the left side of the tractor frame.

Hecklösen devices are:

Adjustable single and multi-tooth blades with 1 or 3 PC teeth.

Weight of tines is 2492 kg. Max. blade depth 1030mm. Max. Lifting height – 600 mm. Maximum separation force – 22,5 t. Maximum penetration – 15.

Weight of three-tooth – 3610 kg. Max. depth – 780 mm. Max. Lifting height – 600 mm. Maximum separation force – 26,5 t. Maximum penetration – 11,8 tons.

Winch – With a maximum pulling force of at least 30,000 kgf. Winch length – 75 meters. Speed of winding the first layer of rope on a drum (design) – at least 10 m/min.

Options, possible equipment

In the list of options available for Buldozer T20: air conditioning, track shoes are expanded from 560 mm to 710 mm, automatic fire extinguishing system, automatic lubrication system, video surveillance system, automatic control system of the mining and transport complex ACS “Career”, sparks extinguishing, protective cabin grilles, LED lights, radio station, Depream quick refueling.

Standard equipment includes: Double cab; GLONASS/GPS satellite monitoring system; Dependent and independent heating of the cab; Engine project system; Temperature readings and-50 ° C +35 ° C; Audio system; Automatic sound alarm; Fron t-Line sound alarm; Rearview mirror; Seat with micro-pressures and pneumatic suspension.

Cetra T20 bulldozer tractors are certified by TÜV Rheinland Intercert for compliance with EU standards; They are equipped with cummins diesel engines that meet the most stringent international emission standards currently required for special equipment (Trier 3 / Level III, Level IIIA).

They are equipped with monolithic aluminum heaters from AKG Made in Germany. The use of air/air and fuel coolers in the radiator unit has increased engine efficiency and reduced emissions.

In addition, additional fuel filters have been installed, which take over the functions of water separation and diesel fuel heating. Transparent cover of these filters provides visual control over the service life of the filter element.

Modern Eberspächer liquid heaters for engine and cab preheating with automatic control are also installed on CHETRA T20 tractors. Their use ensures easy engine starting and extends its service life, and leads to a reduction of harmful emissions into the atmosphere;

David Brown are installed on CHETRA T20 tractors (as well as on a number of other models of Cheboksary plant Promtractor). Hydraulic valves, hydraulic and electronic joysticks, axial piston regulating pumps from Bosch are also used.

Load-sensing hydraulic systems (LS-systems) are used in all Chetra tractor models, and LudV systems in tractors with Bosch hydraulic units allow to perform combined operations regardless of load and operating speed.

The tractors for the Chetra 11, Chetra T20 and Chetra T25 bulldozers are equipped with electrohydraulic transmission control. Management is done with the controller and remote control, which are located in the cabin.

Reviews about the Chetra T20 bulldozer

Judging by operator reviews, the Chetra T-20 bulldozer works well if you follow them and don’t skimp on their maintenance. Yes, of course, it’s not the same level as a Komatsu or Caterpillar. But they also cost much less. After all, for example, for the price of a CHETRA T20 you can take only a very used “Japanese” or “American” class. The new ones are out of the question: the import prices are exorbitant.

There are also the “Chinese”, which are comparable in price, but far from being superior to the Chitra. Chitra T20 justifies and counts – it is simple and simple, spare parts are cheap.

Price of Chetra T20 bulldozer

The cost of a new Chitra T20 bulldozer is currently 10 million rubles. On the secondary market, there are many used options in good condition: