Tractors under the Chetra brand owe their fame and popularity among industrialists to the heavy crawler bulldozer T-11. It was this tractor that became the flagship in the production line of powerful bulldozer equipment, which is successfully used in production, in various industries.
The scope of the T-11 model is very extensive. It is widely used in the exploration and development of oil and gas fields, extractive mining, on construction sites, as well as in the construction of new and in the repair of old roads.
This bulldozer is equally good at working on all types of soil, be it frozen or hard. Such performance, plus safe and comfortable working conditions, made the machine popular, able to successfully compete with domestic and foreign counterparts.
The history of the creation of the Chetra T-11 bulldozer
The decision to build a new, large tractor plant was adopted in 1971, and in January 72nd its construction began. Simultaneously with the construction, there was a recruitment of personnel for the team of tractor-builders of a new enterprise, the Cheboksary Plant of Industrial Tractors or ChZTP.
Experienced specialists from such enterprises as: ChTZ, PTZ, VgTZ, etc. were invited to leading positions. In the same 1972, recruitment began for ordinary positions, young people from different parts of the country were drawn to the new enterprise.
In December 1974, the first workshop of the plant began work; components for the first tractor were manufactured on its premises. In 1975 on October 25, department technical control took over the first bulldozer of the ChZPT brand, the heavy T-330, the power of which was 330 hp. This day is considered to be the birthday of the company. In September 1982, the 1000th anniversary T-330 tractor was manufactured.
Bulldozer T-330.
In 1985, the development of a line of new industrial machines 50, 35 and 25 tons. The first three bulldozers T-25.01 with a planetary gearbox were built. On its basis, a reclamation machine and a modification for pipe laying were created.
At the end of 1993, ChZPT was privatized and transformed into Promtractor OJSC.
In 1995, the T-35 and T-25 tractors went into series, these machines were equipped with YaMZ diesel engines. Work on the 240 and 280 hp bulldozers, called the T-15 and T-20, began in 1996.
The first was assembled T-20 in the winter of 97th, and in October 99th the first serial T-15. In the same 1999, the design of the T-11 began, it weighed 19 tons and the power reached 180 hp. The first bulldozer T-11 was manufactured in 2001, Sberbank took part in this project as an investor, and in the same year its mass production was launched.
In 2002, at the Traktor Show, where new models of tractors were demonstrated, Promtractor OJSC presented its products to the public for the first time under the CHETRA brand. In June 2005, the enterprise became part of the Tractor Plants LLC concern.
Technical characteristics of the Chetra T-11 bulldozer
The T-11 bulldozer was created to work in all climatic zones, the machine feels great both at -50 in the north and in the southern latitudes at temperatures up to +50. Maintainability and ease of maintenance is ensured by the modular arrangement of tractor units and parts. Each module can be separately dismantled and transported to the repair shop, leaving a multi-ton machine in place.
The tractor was developed together with the German concern Sauer Danfoss, taking into account modern requirements, so the T-11 includes units and assemblies of domestic and foreign production.
Let's take a closer look at the bulldozer.
Dimensions and weight of the tractor:
- Length - 6588 mm;
- Width - 3854 mm;
- Height - 3412 mm;
- Base - 2616 mm;
- Weight with ripper, blade and internal combustion engine, YaMZ / Cummins - 20785/19975 kg.
Engine of the bulldozer Chetra T-11
CHETRA T-11 is equipped with diesel engines of two different brands:
- Domestic YMZ-236ND2;
- American Cummins QSB6,7-C204.
Yaroslavl Motor Plant provided a V-shaped, four-stroke, six-cylinder, liquid-cooled diesel engine. With an engine volume of slightly more than 11 liters, its power was 136 (185) kW (hp), at an engine speed of 1900 rpm. The cylinders are 130 mm in diameter and the piston stroke is 140 mm. The torque given out at engine speeds of 1200-1400 rpm is approximately 883 Nm.
American machine builders supply a six-cylinder, four-stroke, in-line, supercharged and liquid-cooled unit. Thanks to supercharging and others design features, from a volume of 6.7 liters, it was possible to remove 137.5 (187) kW (hp) at a maximum of 2000 rpm. The bore to stroke ratio is 102 / 136.4 mm. Torque at rated engine speed 1500 rpm, about 938 Nm.
American diesel is slightly superior in performance to its Yaroslavl counterpart, it is also considered more reliable and economical. However, YaMZ is much easier to maintain and repair it is much cheaper, in addition, Yaroslavl diesel engines have passed more than a single test in the north and at the same time received for the most part positive reviews... Therefore, it is not easy to give an unequivocal answer which engine is better, the main thing is that there is a choice.
Transmission of the bulldozer Chetra T-11
The gearbox on the T-11 bulldozer is of the planetary type and has the ability to shift gears under load. The couplings operate in oil and are distinguished by their ability to transmit high torque values.
Provides the tractor with three speeds forward and the same backward, while the travel speed is from 3.7 to 11 km / h forward and backward from 5 to 14.4. The box together with the main gear and the matching gear forms a single module installed in a special bore rear axle.
Transmission and chassis of the Chetra T-11 bulldozer
The hydrostatic transmission was developed by the aforementioned Sauer Danfoss company, especially for CHETRA bulldozers.
For reliable transmission of torque from the diesel engine to the gearbox, a torque converter is used, which is connected to the motor using an elastic coupling and a cardan drive.
The brakes are multi-disc clutches, constantly closed by spring force. Throughout the entire service life, they do not need adjustment, and cooling with the help of oil flowing under pressure.
The tractor has a semi-rigid, three-point suspension. The extended swing axis of the bogies gives the bulldozer increased traction properties and reliable adhesion to the surface, as well as protects the T-11 chassis from impact loads.
The idler wheels, and with them the carrier and track rollers, are equipped with self-tightening so-called "double cone" seals and lifetime one-time grease. Each track of the bulldozer has two carrier rollers and six track rollers.
Tracks of the T-11 tractor are modular, each shoe has one lug, and there is a seal in the hinge to delay lubrication.
The surface area on which the caterpillar rests is 2.668 m2, while the ground pressure does not exceed 0.76 kg / cm2.
- The number of shoes in the track - 39 pcs;
- Links with a pitch - 203 mm;
- Grousers with a height of 65 mm;
- The width of the shoes is 510 mm.
Steering and cab of the Chetra T-11 bulldozer
The T-11 is controlled by side clutches, multi-plate clutches with the help of hydraulics driven. Disconnecting (in whole or in part) the clutches of the left or right side clutch, the bulldozer turns in the appropriate direction. The clutches are controlled from the control station, using two levers.
The tractor cab has double glazing, excellent visibility of all working areas and equipment. Equipped with heating and forced ventilation systems, and on request with an air conditioning system.
The interior trim, the shape of the panels and controls have a modern design and are made of high-quality materials, and most importantly, they are located as conveniently as possible for the operator.
The gas pedal can be fixed in the selected position, providing the required engine speed. One lever is responsible for the direction (forward, backward) and gear shifting. Two small levers to the left of the driver operate the side clutches. There are two separate levers to control the ripper and blade. All controls are accessible from the operator's seat to help reduce operator fatigue during the shift.
Hydraulics and attachments of the Chetra T-11 bulldozer
The separate-modular system of the T-11 bulldozer includes:
- Gear pump S1A6097, with engine speed of 1800 rpm, produces a capacity of 163 l / min. Manufacturer, the company "David Brown";
- The distributor is four-section from the "Bosch Rexton" company, three working sections, one valve;
- Safety valve, operates at pressure over 200 MPa;
- Welded hydraulic tank with a capacity of 85 liters;
- Hydraulic cylinders 5 pcs. 2 to raise and lower the blade, 1 to turn the blade to the right and left, 2 to raise and lower the ripper.
Bulldozer equipment.
The large-capacity hemispherical blade provides the T-11 bulldozer with high productivity... The use of a diagonal thrust when transferring side loads from the blade to the left spar of the bulldozer gives the blade the closest approach to the hood and the greatest support force on the blade blade.
Ripper.
Depending on the required performance, rippers with one tusk, as well as with three or two teeth, are installed on CHETRA bulldozers.
- Ripper type - multi-shank / non-adjustable;
- Number of teeth - 3/1;
- Depth - 640/530 mm;
- Burial force - 6.14 / 5.7 t;
- Pull-out force - 17.15 / 16 t.
Modifications of the Chetra T-11 bulldozer
Bulldozers T-11 can be equipped with engines of two manufacturers and different attachments and mass. For example: T-11.02YAB is equipped with a YaMZ-236 diesel engine, and its mass ranges from 20.87 to 23.4 tons; T-11.02K with a Commins diesel engine and weighing from 20.4 to 23.4 tons.
Also, after the name, you can find additional letters that are written for easier identification, their designations:
- M - low ground pressure;
- C - the presence of a hydrostatic transmission;
- L - complete winch;
- P - with a rotary blade.
Operation of bulldozers Chetra T-11
The overwhelming majority of machines of this class in our country work in difficult conditions of the north, Siberian and Far Eastern taiga. They develop oil and gas fields, as well as participate in the exploration of new ones. Oil and gas pipelines are being laid through wild uninhabited places where there are no roads or infrastructure. They work in gold mining, in the mines of eastern Siberia and on the river. Kolyma.
In such difficult conditions, technology often works to the limits of the possible, and the advantages, as well as disadvantages, quickly manifest themselves:
Advantages.
- Adaptation of machines to the conditions of the north: preheating engine; additional, independent heater in the cabin, imported fuel filters with the function of fuel heating and water separation;
- Modular design of units and systems, which increases maintainability and ease of maintenance;
- Reliable diesel engines YaMZ and Commins;
- Comfortable working conditions for the operator.
Chetra T-11 performs a trick.
Flaws.
- The most common problems arise with hydraulics, after operating hours of 2-3 thousand hours;
- Problems in the operation of the transmission (again in terms of hydraulics);
- In general, they are inferior in reliability and operating time to well-known foreign analogues.
- Not longer service life of tracks.
Conclusion
In general, the car is not bad, although it is inferior in reliability to some foreign analogues. In the CHETRA brand, which is not unimportant for the domestic machine-building industry, the manufacturer paid considerable attention to the operator's comfort. Also, the structure as a whole uses modern design solutions and technologies. Of course, there are a lot of flaws that the plant has yet to fix, but in general CHETRA is moving in the right direction.
At a price, bulldozers of this brand are about 1.5 times cheaper than their eminent counterparts from abroad. This is a significant advantage over competitors in favor of CHETRA in the domestic market.
On the secondary market the price of a T-11 bulldozer can range from 800-900 thousand for a machine in working order produced in the early 2000s, up to 4.5 million for a powered copy of 4-5 years of age. New T-11s can be purchased for 5.5-6.7 million rubles.
Bulldozer T-1101, tractor T-11.01, T-11.02, CHETRA T11 has a high productivity and can be used in industrial, oil and gas, hydraulic engineering, road construction and mining for various types of work, including the development of frozen soils.
Characteristics of t-11.01
Detailed description of the characteristics of the bulldozer T-11.01, CHETRA t 1101 manufactured by JSC Promtraktor. The sections indicate specifications both the bulldozer T-11.01, T-1101 as a whole, and individual components and assemblies.
- Engine
- Transmission
- Running system
- Caterpillar
- Hydraulic system
- Bulldozer equipment
- Ripping equipment
- dimensions
- Weight
- Modifications and equipment
- Special offer
- Reviews
Bulldozer CHETRA T-11.01 YABR-1
ENGINE
Bulldozer T-11.01, T-11.02, CHETRA T-11, Tractor T-1101 comes with different models engine, both the Yaroslavl Motor Plant, and the Cummins engine.
YaMZ-236 ND-2 engine
Six-cylinder V-shaped (camber angle 90 °) four-stroke liquid-cooled diesel engine YaMZ-236 ND-2 of the Yaroslavl Motor Plant. The installed YaMZ-236 ND-2 engine has the following characteristics:
Fuel pump with regulation of the injection moment with all mode speed regulator. A heat exchanger for cooling the transmission oil is installed as part of the radiator block. Oil purification system with full-flow centrifugal speed controller. Liquid-oil heat exchanger for engine oil cooling. Thermal regulation is provided by a thermostat and a fan driven by a disc clutch with automatic switching control depending on the coolant temperature. 24-volt electric starting system. 
Cummins QSB6,7-C204 engine
Six-cylinder four-stroke liquid-cooled diesel engine with turbocharging and air-to-air cooling of charge air QSB6,7-C204 from Cummins with in-line arrangement of cylinders has the following technical characteristics.
Full-flow oil purification system with one replaceable paper filter element. Thermal regulation is provided by a thermostat. The transmission oil is cooled by the engine coolant in a heat exchanger separate from the engine. Anti-corrosion filter for the cooling system. Liquid-oil heat exchanger for engine oil cooling. Pusher fan. The fan is driven by a belt drive.
TRANSMISSION
Planetary gearbox of the CHETRA T-11 bulldozer, the T-11.01, T-11.02 bulldozer, the T-1101 tractor, switchable under load, with clutches with a diameter of 345 mm, operating in oil and having a high torque transmission capacity, providing three forward gears and three transmission reverse... The gearbox is combined with a matching gear and the main gear into a single power unit, which is installed in the bore of the rear axle. A three-element, single-stage torque converter with an active diameter of 390 mm, a maximum transformation ratio of Ko = 2.539 with a pump drive gearbox, connected to the gearbox by a splined clutch, installed on the front wall of the rear axle. The torque converter is connected to the engine via cardan transmission and an elastic coupling mounted on the engine.
Gearbox specifications |
||
| Broadcast | Forward motion | Reverse |
| 1 | 3.7 | 5.0 |
| 2 | 6.8 | 9.0 |
| 3 | 11.0 | 14.4 |
The pulling force depends on the weight of the dozer and the traction force.
STEERING AND BRAKING
The side clutches are hydraulically actuated multi-plate clutches. The stopping brakes are multi-plate clutches permanently closed by the force of springs. The clutches and brakes are cooled with oil under pressure and do not require adjustment during the entire service life.
ONBOARD TRANSMISSION
Onboard transmission - two-stage, 1st stage - external gears, II-stage - planetary according to the "k + 1" scheme (with the ring gear stopped). To facilitate ease of replacement in field conditions the drive sprocket is made in five sectors, which are bolted.
CHASSIS
Suspension: Three-point semi-rigid suspension with a bogie swing axis provides high traction and coupling properties, reducing shock loads on the chassis. Track and carrier rollers, disposable grease idler wheels with self-locking double cone seals.
Caterpillar
The caterpillars of the CHETRA T-11, T-11.01, T-11.02 bulldozer are modular with one lug and a seal to keep the liquid lubricant in the hinge. Track tension is adjusted with a grease gun.
Hydraulic system
Separate-aggregate hydraulic system CHETRA T-11.01, T-11.02 includes:
- gear pump S1A6097 by David Brown with a capacity of 163 l / min at 1800 rpm of the engine
- four-section valve from Bosch Rexroth, consisting of one valve and three working sections
- maximum response pressure of the safety valve - 20 MPa (200 kgf / cm²)
- hydraulic tank capacity (welded tank, adapted for mechanical cleaning of internal surfaces) - 85 l
Cabin
On a bulldozer CHETRA T11 a double-glazed cab has been installed for maximum visibility to equipment and work areas.
The cab is equipped with a ventilation system and a heater, as well as a vibration-proof seat and noise-absorbing upholstery. On request it is installed additional heater and air conditioner.
The controls meet ergonomic requirements and are easily operated and accessible. The diesel engine is controlled by a pedal fixed at the selected speed crankshaft... Shifting gears and changing the direction of travel is carried out with one lever, the onboard clutches are controlled by two levers, an emergency stop is provided by pressing the brake pedal. 
The dozer and ripper are controlled by separate levers. All control is carried out from the driver's seat, which allows him to work without fatigue during the work shift.
Bulldozer equipment
The large capacity of the hemispherical blade of the CHETRA T-11.01, T-11.02 bulldozer provides increased productivity, and the use of diagonal thrust when transferring lateral forces from the blade to the left spar of the bulldozer frame ensures the maximum approach of the blade to the hood of the bulldozer and the maximum pressure on the blade blade.
Ripping equipment
Depending on the work of the CHETRA T-11, T-11.01, T-11.02 bulldozer, one, two or three teeth can be mounted on the ripper, which allows to obtain high productivity.
Refueling tanks
The filling tanks of the CHETRA T-11, T-11.01, T-11.02 bulldozer have the following characteristics:
dimensions
The dimensions parameters of the CHETRA T-11, T-11.01, T-11.02 bulldozer are represented by the following characteristics:
Weight
The total mass of the CHETRA T-11.01, T-11.02 bulldozer standard configuration(SU-blade, three-shank ripper with YaMZ engine) - 20 785 kg, with Cummins engine - 19 975 kg.
Specials
Bulldozer CHETRA T-11.01 YABR-1
On sale bulldozer CHETRA T-11.01 YABR-1 (T11, T-1101) in stock and to order, both new and after overhaul... The CHETRA T-11.01 YABR-1 bulldozer is equipped with a YAMZ-236ND-2 engine with a power of 154.5 kW (210 hp), a hemispherical blade and a single-shank ripper. ...
Bulldozer CHETRA T11M Swamp vehicle
We also offer in stock and on order CHETRA T11M with reduced ground pressure, providing high driving performance on soils with low density. ...
Modifications and equipment
Bulldozers CHETRA T-11, T-11.01, T-11.02 are supplied in the following modifications and configurations.
| Modification | Equipment | Engine power, kW / h.p. | Weight, kg |
| T-11.02YAB-1 | YaMZ-236ND-2, hemispherical blade, hitch | 136/185 | 20870 |
| T-11.02YABR-1 | YaMZ-236ND-2, hemispherical blade, ripper 1 tooth | 136/185 | 20870 |
| T-11.02YABR-1-01 | YaMZ-236ND-2, hemispherical blade, ripper 3 teeth | 136/185 | 20870 |
| T-11.02YABL-1 | YaMZ-236ND-2, hemispherical blade, winch | 136/185 | 20870 |
| T-11.02YAMB-3 | YaMZ-236ND-2, straight blade, mono pressure on the ground, towbar | 136/185 | 23400 |
| T-11.02YAMBR-3 | YaMZ-236ND-2, straight blade, ripper 1 tooth, low pressure on the ground | 136/185 | 23400 |
| T-11.02YAMBR-3-01 | YaMZ-236ND-2, straight blade, ripper 3 teeth, low pressure. on the ground | 136/185 | 23400 |
| T-11.02YAMBL-3 | YaMZ-236ND-2, straight blade, winch, mono pressure on the ground | 136/185 | 23400 |
| T-11.01K1SB-1 | Cummins QSB6,7-C204, hydrostatic transmission, hemispherical blade, hitch | 138/187 | 18712 |
| T-11.01K1SBR-1 | Cummins QSB6,7-C204, hydrostatic transmission, hemispherical blade, 1 tooth ripper | 138/187 | 18712 |
| T-11.01K1SBR-1-01 | Cummins QSB6,7-C204, hydrostatic transmission, hemispherical blade, 3-tooth ripper | 138/187 | 18712 |
| T-11.02KB-1 | Cummins QSB6,7-C204, hemispherical blade, hitch | 138/187 | 20400 |
| T-11.02KBR-1 | Cummins QSB6,7-C204, hemispherical blade, 1 tooth ripper | 138/187 | 20400 |
| T-11.02KTBR-1 | Cummins QSB6,7-C204, hemispherical blade, 1 tooth ripper, forest protection | 138/187 | 20475 |
| T-11.02KBR-1-01 | Cummins QSB6,7-C204, hemispherical blade, 3-tooth ripper | 138/187 | 20400 |
| T-11.02KBL-1 | Cummins QSB6,7-C204, hemispherical blade, winch | 138/187 | 20400 |
| T-11.02KMB-3 | Cummins QSB6,7-C204, straight blade, mono on the ground | 138/187 | 23400 |
| T-11.02KMBR-3 | Cummins QSB6,7-C204, straight blade, mono on the ground, ripper 1 tooth | 138/187 | 23400 |
| T-11.02KMBR-3-01 | Cummins QSB6,7-C204, straight blade, mono on the ground, ripper 3 teeth | 138/187 | 23400 |
| T-11.02KMBL-3 | Cummins QSB6,7-C204, straight blade, mono on the ground, winch | 138/187 | 23400 |
Standard equipment
The standard equipment of the CHETRA T-11.01, T-11.02 bulldozer includes:
- Adjustable operator seat with soft cushion
- Air purifier
- Cab heating fan
- Deselerator
- Sound signal
- Front towing hook
- Engine protection
- Hydraulic Track Tensioner
- Lighting system
- Multi-layered protection
- Muffler
- Parking brake
- Power train protection
- Replaceable ring gear segments
- Protective ROPS / FOPS
- Safety belt
- External power socket 24 V
- Power socket 24 V
- Generator alternating current 75 A
- Rechargeable batteries (2), 12 V, 190 A * h (voltage on-board network 24 V)
- Cigarette lighter
- Starter
- Electric hour meter
On the dashboard:
- tachometer
- coolant temperature gauge
- engine oil pressure gauge
- engine oil temperature gauge
- on-board voltage indicator
- fuel gauge
- transmission oil temperature gauge
Indicators on the dashboard:
- emergency engine oil pressure
- overheating of the engine coolant
- lack of battery charge
- clogged air filter
- clogged filter in the hydraulic tank
- overheating of the oil in the hydraulic tank
- clogged filter in the transmission
- minimum transmission oil temperature
- overheating of the oil in the transmission
- weediness oil filter engine
- emergency transmission oil pressure
Optional equipment
Additionally, the CHETRA T-11.01, T-11.02 bulldozer is equipped with:
- Tool kit
- Maintenance tool
Equipment for work in arctic conditions
To operate in arctic climatic conditions, the CHETRA T-11.01, T-11.02 bulldozer is additionally equipped with:
- Prestarting liquid heater PZhD 30L, HYDRONIC M-II, HYDRONIC 35
- Independent cabin air heater AIRTRONIK-2D
- Cab heater powered by engine coolant
- Insulation cover
- ICE radiator blinds
See also:
Bulldozer Chetra T-11.01 is a tractor complete with bulldozer and loosening equipment. The tractor can be operated in the most severe climatic conditions (-50C ... + 50C) thanks to double glazing, modular design of units, running system, transmission, working equipment, cab and control, allowing relatively easy maintenance of the tractor and replacement of spare parts.
An additional cab heater and air conditioning are available as options for the Chetra. Standard equipment includes a cab heating fan, decelerator, hour meter and various protections: engine, power train, front towbar and other equipment.
According to experts, the T 11 bulldozer is indispensable in road construction due to its power, maneuverability and reliability, it is widely used in various fields, including urban planning, as is done in Cheboksary. Also note that for a bulldozer Russian production original and high-quality Chetra spare parts are always available (for example, Optcentre is an official dealer).
In 2011, tests of the CHETRA 11 series bulldozer with a hydrostatic transmission (GST), which was developed on the basis of Sauer Danfoss hydraulic machines, were completed. Bulldozer T11S, in comparison with bulldozers with hydromechanical transmission, due to better maneuverability, with greater accuracy and efficiency, performs complex excavation work even in confined spaces.
The bullodzer is equipped with different engine models:
- YaMZ-236ND-2 136 kW (185 hp) - four-stroke six-cylinder V-shaped diesel engine without turbocharging (Chetra with the index "I"),
- QSB 6.7-C204 137 kW (187 hp) - four-stroke six-cylinder Cummins in-line turbocharged diesel engine (Chetra with "K" index)
Transmission- planetary, power shift, with clutches with a diameter of 345 mm, operating in oil and with a high torque transmission ability, providing three forward and three reverse gears.
Description of the undercarriage of the bulldozer:
Suspension Chetra: three-point semi-rigid with an extended swing axis of the bogies. 6 track rollers, 2 carrier rollers and lifetime lubricated single-use idler wheels with self-locking double cone seals.
The tracks of the bulldozer are modular, with a link pitch of 203mm, the number of shoes is 39 on each side, the base is 2616mm, with one lug and a seal to keep the liquid lubricant in the hinge. Track tension is easily adjusted with a grease gun. Support surface area - 2.668 m2, ground pressure - 0.76 / 0.75 kgf / cm2.
The tractor is equipped with the following loosening and bulldozing equipment:
- Blade type: hemispherical, rotary (mechanical), straight, rotary (hydraulic).
- Ripper: one-, three-, seven-tooth.
The catalog of parts and assembly units (spare parts) of the Chetra tractor is a reference tool for drawing up applications and calculating spare parts, intended for employees of enterprises and farms involved in the operation and repair of tractors and bulldozers. The catalog contains detailed specifications of assembly units and parts, grouped by design and function.
In connection with the constant work to improve the T-11 tractors, increasing its reliability and improving the operating conditions, changes may be made to the design that are not reflected in this publication.
As we have repeatedly mentioned in this section, we supply tractors and bulldozers of the Chelyabinsk Tractor Plant and all special vehicles mounted on their base, but we also have the opportunity to supply spare parts for machines from other manufacturers, including the Chetra brand. Maximum coverage has always been our goal Russian market special equipment in terms of working with a variety of customer requests. With many years of work in this market, strong ties are established with machine builders, information about similar machines is accumulated.
The Chetra line of bulldozers and the place of the T-11 model in it
The machine-building plant OJSC "Promtractor" in Cheboksary is a well-known manufacturer that produces crawler tractors models from T-9 (diesel power 150 HP, machine weight 17-20 tons) to T-40 (diesel power 590 HP, tractor weight 65 tons). The T-9 model with the YaMZ-236-NB-2 or Cummins engine is slightly less than the ChTZ T10M (B10M) in terms of its characteristics and capabilities, and the Chetra T-40 is one of the seven most powerful tractors Russia.
Model T-11 - following the T-9 in lineup"Chetra", approximately corresponds to the characteristics of the model B11 "ChTZ" (diesel 190 hp, 10th traction class with hydromechanical transmission). The T-11 tractor with the designation "-Ya" in the model name is equipped with a Yaroslavl diesel engine YaMZ-236-ND-2 (185 hp), has a mass of 20.3 - 23 tons, can operate different kinds dumps (swivel from mechanics or hydraulics) and three types of rippers - one-, three- and seven-tooth.
For example, version of the machine T-11.02Ya BR-1- this is a bulldozer with the aforementioned Russian diesel engine, a hemispherical blade (rather large: blade capacity - 5.6 m 3) and a ripper with 1 tooth (maximum penetration into the soil - 640 mm).
Imported developers and components
In the development of its designs, Promtractor OJSC actively uses imported units and components (European and American): for example, the transmission was developed by the order of this enterprise by the German company Sauer Danfoss. Onboard transmissions with brakes, the pump drive reducer for it was developed by the design bureau of JSC "Promtractor". Other imported parts besides Cummins diesel:
- radiators AKG (Germany);
- gear oil pump with David Brown helical gears;
- Fleetguard diesel fuel filters with various advanced features over "conventional" filters;
- hydraulics Bosch - Rexroth etc.
The capabilities of the T-11 and the requirements for a modern bulldozer
Bulldozer T-11 "Chetra" can perform the planning of sites and routes, excavate soil, carry out excavation work, build embankments, move building materials, and be used in logging operations. One of the main functions of the bulldozer, as always, is the development of hard soils by a scarifier (if the soils, for example, rocky ones, are single-toothed, to use the maximum force of the machine) and the subsequent sampling of the waste rock with a swivel blade.
We can say that a modern bulldozer is required to:
- the most effective use of the mass of the machine when bulldozing, which is expressed in the design of the bulldozer attachment tool, its long-stroke cylinders;
- smooth gear shifting under load, smooth adjustment of the traction force depending on the traction resistance encountered (this is the responsibility of the hydromechanical transmission, which is present on all Chetra machines, and its control);
- a set of universal bulldozer-ripping tools, additionally - trailed devices and winches;
- comfortable ergonomic cabin with joysticks, with a maximum glass area for visibility, but sealed, with air conditioning, heater, with a system ROPS protection- FOPS;
- small specific pressure of the tracks on the ground;
- undercarriage (wheels, rollers, tracks), which does not require very time-consuming maintenance.
Our spare parts for the bulldozers "ChTZ" and "Chetra"
We supply a very large volume of spare parts to our customers for tractors and bulldozers of the Chelyabinsk Tractor Plant, and we keep an extensive catalog on the website - a detail of all units: from forks and gear shift rollers to cab windows and cords that seal them, from bogie frames to braces of bulldozer equipment. We are ready to supply all the same for the Chetra bulldozers:
- spare parts for the Yaroslavl diesel engine YaMZ-236-ND-2 and the air, oil and fuel supply systems serving it;
- components of hydromechanical transmission with planetary gearbox, side clutches, brakes;
- spare parts for bulldozer, loosening, trailed equipment;
- cabin equipment;
- definitely - everything related to caterpillar: from track rollers and carrier rollers to final drive bearing housings.
Over time, in the process of working with different series and models of machines, experience and understanding the features: what is the difference, for example, between the support rollers and the idler wheels of the tracks at ChTZ and Chetra, what are the self-tightening seals of the double cone type, which are considered a big advantage of the Chetra undercarriage design. Otherwise, machines from different manufacturers for the same functions, especially tractors of the same traction class, many similar nodes: For example, torque converter, planetary gearbox, long stroke dozer blade design, etc.
