Bulldozer CHETRA T11 specifications

The Russian-made Chetra T-11 bulldozer is famous for its high popularity among compatriots. Its main competitor is foreign-made special equipment, but their cost and maintenance are higher. Another big advantage of the Chetra T-11 model is the ability to work in the temperature range from -50°C to +50°C, which is important when using a bulldozer in Russia.

The Chetra T-11 device is distinguished by a high level of cross-country ability and productivity in any mode of operation. The scope of the bulldozer includes loading and unloading, waste and soil, as well as their movement over distances of up to 300 m. This bulldozer is used in road, hydraulic engineering, mining, etc.

Technical parameters of special equipment

Technical characteristics of the bulldozer Chetra T-11 are presented in the table:

Dimensions of the bulldozer Chetra T-11

Modifications

Among the modifications of the Chetra T-11, the following models can be distinguished: Chetra T-11T, Chetra T-11C Chetra T-11M.

Engine Specifications

This machine has three engine options:

• YaM3-236ND2 is a Yaroslavl-made diesel engine, six-cylinder, four-stroke, V-shaped, liquid-cooled. To adjust the temperature, a fan and a thermostat are installed in it.

• Cummins QSB6.7-C204 is an American six-cylinder, four-stroke, liquid-cooled, turbocharged diesel engine. The engine has an oil cleaning system.
• Sisu Diesel 74 is a turbocharged diesel engine manufactured in Russia using Finnish technology. Rarely seen on the Chetra T-11.

Of these engines, the American version is considered the best due to its greater power, torque characteristics and lower fuel consumption.

The Chetra T-11 has a German Sauer Danfoss transmission of a hydrostatic type with two hydraulic pumps, a control controller and two hydraulic motors. Six speed planetary gearbox - 3 forward and 3 reverse. Can switch under load. The gearbox, main gear and gearbox are combined into one functional unit, which is installed in the bore of the rear axle. The transmission guarantees the control of special equipment, the correct operation of the engine, safety in case of force majeure and the correction of traffic on the road.

Bulldozer Chetra T11

ENGINE

At the request of the customer, this model can be supplied with different engine models.
YaMZ-236ND-2

136 kW (185 hp)

QSB 6.7-C204

137 kW (187 hp)

TRANSMISSION

Powershift planetary gearbox with 345mm diameter oil immersed clutches with high torque transfer capability providing three forward and three reverse gears. It is structurally combined with a matching gearbox and final drive into a single power unit 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, is connected to the gearbox with a splined coupling, and is installed on the front wall of the rear axle. The torque converter is connected to the engine through a cardan drive and an elastic coupling mounted on the engine

Traction force depends on tractor weight and traction.

STEERING AND BRAKING

Side clutches are multi-plate clutches that are hydraulically actuated. Stopping brakes are multi-disc clutches permanently closed by spring force. The side clutches and brakes are cooled with pressurized oil and do not require adjustment during their entire service life.

FRONT TRANSMISSION

The onboard transmission is two-stage, the 1st stage is external gears, the 2nd stage is planetary according to the “k + 1” scheme (with the ring gear stopped). For ease of replacement in the field, the drive sprocket is made in five sectors, which are bolted.

CHASSIS

Suspension: three-point semi-rigid suspension with a remote bogie swing axis provides high traction and coupling properties, reduction of shock loads on the undercarriage system, improvement of working conditions. Track rollers, carrier rollers and idlers with one-time lubrication for life with self-locking “double cone” seals.

Number of track rollers (each side) - 6 Number of carrier rollers (each side) - 2

Tracks: Prefabricated with a single grouser and a seal to retain liquid lubricant in the pivot. Track tension is easily adjusted with a grease gun.

Link pitch — 203 mm Number of shoes (on each side) — 39 Grouser height — 65 mm Shoe width — 510 mm Base — 2616 mm Bearing surface area — 2.668 m2 Ground pressure — 0.76 / 0.75 kgf/cm2

REFILLING CAPACITIES

Fuel tank - 300 l Cooling system - 80 l Engine - 21 / 19 l Torque converter, gearbox, bevel gear - 85 l Final drive (each side) - 2 x 16 l Attachment hydraulic system - 135 l

TRACTOR WEIGHT

Tractor weight 19400-23070 kg

WORKPLACE

The CHETRA T-11.01 tractor is equipped with a single cab with double glazing, providing maximum visibility of the equipment and working areas, regardless of the ambient temperature, equipped with a ventilation system and a dependent-action heater, as well as a vibration-proof seat and noise-absorbing upholstery. On request, an additional heater and air conditioning are installed. The controls meet ergonomic requirements and are easily operated and accessible. The diesel engine is controlled by a pedal fixed at the selected crankshaft speed. Shifting gears and changing the direction of movement is carried out by one lever, the onboard clutches are controlled by two levers, an emergency stop is provided by pressing the brake pedal. The bulldozer 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.

RIPPER EQUIPMENT

Blade type: hemispherical, swivel (mechanical), straight, swivel (hydraulic).

BULLDOZER EQUIPMENT

Ripper: one-, three-, seven-tooth

Running gear parameters

Each caterpillar of the Chetra T-11 bulldozer has 6 main rollers and 2 supporting ones. The rollers are lubricated once during assembly, you will not have to do this again. The same goes for the steering wheels. Self-clamping seals (“double cone”) are installed on them. Tracks are assembled at the factory from separate elements, have seals in the hinge to control the level of lubrication. To adjust their tension, use a syringe. Each track consists of 39 shoes, each 510mm wide

Caterpillars of the bulldozer Chetra T-11

The undercarriage of the special equipment has a three-point semi-rigid suspension. This allows the bulldozer to have excellent traction properties, good traction and restraint from strong shock loads.

Torque is transmitted from the engine to the gearbox using a three-stage torque converter. Its connection with the motor is provided by an elastic coupling and cardan transmission.

Special equipment Chetra T-11 slows down with the help of onboard clutches. They are represented by multi-plate clutches operating on the principle of hydraulics. The same applies to the parking brake. They are cooled with oil, they do not need to be adjusted and adjusted.

Engine

It can be installed in three types:

1. YaMZ-236ND-2 - six-cylinder four-stroke V-shaped power unit. Produced in Yaroslavl. It is liquid-cooled and has a right camber angle. This motor model is the most popular, and its cost is less than the rest.

In addition, a thermostat and a fan are installed in the engine to correct the temperature. The fuel pump can also be adjusted to set the injection timing. To cool the engine oil, a liquid-oil heat exchanger and an oil purification complex are installed. The latter can regulate the rotational speed. All these units are configured to automatically start when the temperature of the liquid in the cooling system reaches a certain value. The transmission oil is cooled by another heat exchanger. It is located in the same functional unit with the radiator unit. Starting is carried out directly via the 24 V electrical system.

The important parameters of the unit are the volume of 11.15 liters and the torque of 883 Nm. Cylinder diameter 13 cm.

2. Commins QSB 6.7-C204 also with four strokes and six cylinders with a diameter of 102 mm. It is turbocharged with intercooler and liquid cooled. The name of the unit reflects the name of the American manufacturer.

The main characteristics of this model are:

• rust-preventing cooling filter,
• oil cleaning system
• ventilation system with belt drive for its start and a separate heat exchanger.

All engine cylinders are arranged in a row, the engine has a volume of 6.7 liters. This is almost two times less than the previous model. Torque 938 Nm. The cost of such an engine is the highest among those installed.

3. Sisu Diesel 74 are extremely rare. Such engines are assembled in accordance with Finnish developments in Vladimir.

Engine, power:

Cabin equipment

Cabin of the bulldozer Chetra T-11 inside

The cabin of the bulldozer Chetra T-11 has only one place for the operator. It has double glazing, a heating and ventilation system. If desired, you can install an air conditioning system. The upholstery of the cab does not let in loud sounds, and the seat is equipped with rubber shock absorbers, which guarantees the reduction of seat vibration. It can be customized according to the operator's weight and height.

A big plus for the operator is a good overview of the equipment of the bulldozer and the functions it performs.

The accelerator pedal can be fixed in the desired position to provide the required number of engine revolutions.

One lever allows you to switch speeds, as well as move special equipment forward and backward. On the left side there are 2 small levers that allow you to control the onboard clutches. Selected levers for controlling attachments. All elements for controlling special equipment are located so that the driver can use them comfortably.

Attachment

For this type of special equipment, the following types of attachments are used:

• Rear rippers used in earthmoving. The number of teeth varies from 1 to 7.
• Dumps for mechanical bulldozer works. There are straight, spherical and rotary.

Bulldozer Chetra T-11 with attachments

Such a bulldozer is an excellent analogue of foreign models. The operator's comfortable seat is especially noted in comparison with other Russian-made special equipment.

Spare parts catalog for bulldozer Chetra T-11

The modular use of nodes allows for a complete repair at minimal cost. Each element is easily transported, leaving a multi-ton machine in place, it will be possible to bring spare parts and replace them there.

The catalog allows you to replace any element: transmission, electrical equipment, chassis, attachments, controls. A detailed catalog allows you to select suitable parts and also familiarize yourself with the design, which simplifies the replacement process.

Chetra T-11 - bypasses many competitors, even foreign analogues cannot be compared in terms of technical components. Domestic manufacturers have finally paid special attention to operator comfort. When creating equipment, modern developments and design solutions are used. There are also minor deliveries. The first problems with hydraulics arise after 2-3 thousand hours or with the transmission. Experts are already working to eliminate the shortcomings. The rest will please the technical characteristics, the performance of the equipment. The cost of such a unit is 4-7 million rudders, depending on the model and year of manufacture, it will be cheaper in the secondary market. Chetra t-11 is adapted for work in difficult conditions, the investment spent will justify itself.

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