Bulldozer "Chetra T-40": description, specifications

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

The Chetra T-40 bulldozer is one of the most powerful types of domestic equipment of the corresponding class, designed for the extraction of coal, ore and gold. Optimum traction parameters are provided by the carriage-type running gear. In aggregation with a powerful power plant and a significant blade capacity, such solutions made it possible to provide the highest possible performance along with comfortable operator work and ease of control. Consider the characteristics of the machine, its capabilities and the parameters of similar units.

Motor and transmission

The Chetra T-40 bulldozer equipment is equipped with a Cummins QSK19-C650 engine with a capacity of 590 horsepower (435 kW). The planetary type gearbox aggregates with 455 mm diameter clutches that operate in oil, have a high rate of torque transfer capability. This assembly gives the inclusion of three forward speeds forward and reverse, providing the activation of gears under load. The speed and change of direction of movement is set by the operator using the handle of the multifunction controller.

On the Chetra crawler dozer, control impulses are transmitted to the valvesplanetary gear unit. This unit is integrated into one unit with the gearbox and the main gear. The complex is mounted at the rear of the bridge. The control of the direction of movement and speed control is carried out by means of an electro-hydraulic system.

In a single unit, a pump drive gearbox and a single-stage hydraulic transformer are made. The block is fixed on the power unit. The part is connected to the flywheel of the motor by means of an elastic coupling, and to the transmission box by means of a cardan link.

Undercarriage

The Chetra T-40 is equipped with a three-point suspension with a sprung mechanism for the roller carriages. The assembly also includes telescopic bogies, a remote rolling axle and a transverse balancing beam with shock absorbers. All this in combination guarantees a high traction-coupling rate, a reduction in shock loads on the main (bearing) part and an improvement in service conditions. Also included in the undercarriage system are track and support rollers, idlers with “blind lubrication” and self-locking cone seals.

Caterpillars on the technique in question are of a prefabricated type with one grouser and a seal designed to retain lubricant in the hinge mechanism. The tension of the element is carried out using a syringe with a consistent composition.

Characteristics of the Chetra bulldozer track:

• Pressure on the soil - 1.46 kgf/sq. see
• Supporting surface area - 4.61 sq. m.
• Shoe width - 61 cm.
• Number of shoes witheach side - 40 pieces
• Link pitch - 28 cm.

Hydraulics

The Chetra bulldozer is equipped with a separate-aggregate hydraulic system, which includes the following elements:

• Gear pumps with a total capacity of 550 l/min at 2100 rotations of the motor - three pieces.
• Spool valves responsible for lifting, tilting, cutting and changing the angle of the blade, ripper - 2 pcs. Remote control.
• Filter tank, hydraulic cylinders.

The maximum operating pressure of the safety valve in the system is 20 MPa.

"Chetra T40": characteristics

The following are the main parameters of the technical plan of the machine in question:

• Diesel operating power - 435 kW.
• Fuel tank volume - 1200 l.
• Operating weight - 64.8 t.
• Standard track width is 71cm
• Ground clearance - 723 mm.
• Blade dimensions are 4.73/2.65 m (21 m3).
• Number of ripper teeth - 1 piece
• Tractor dimensions - 6, 05/3, 29/4, 25 m.
• Blade lift/skew - 1, 6/2, 5 m.
• Similar parameters for the ripper - 2, 2x5, 2/2, 2x4, 85 m.

Features

The Chetra T40 bulldozer, described above, is equipped with a single-tooth or three-tooth ripper weighing 6.1 or 8.3 tons, as well as a blade with a capacity of more than 20 cubic meters. This techniquethe durability of all main components and parts is distinguished. The benefit of the unit is obvious, given that before the overhaul it is able to work at least 150 thousand m / h. The cab is equipped with air conditioning, is quite comfortable, its design provides good visibility, is protected from extraneous noise and vibration.

Analogues

Crawler bulldozer "Chetra T-35" is the forerunner of the technique in question. It features high performance, strong and wear resistant tracks.

Parameters:

• Weight - 60.5 t.
• Blade dimensions - 5200/2200 mm.
• The power of the power plant is 490 liters. s.
• Surface/track pitch - 4.6 sq. m/255mm.
• Shoe width - 650 mm.
• Specific pressure on the soil - 1.3 kgf/sq. m.

This bulldozer is adapted to work in northern regions and hot areas. Designed for the construction, mining and oil refining industries. The cabin is equipped similarly to other Chetra modifications, the instrument panel has a modern design and a convenient system for switching keys and toggle switches.

T-25 modification

This technique is one of the earliest variants of the considered family. The machine is used in the mining and construction industry. The unit is equipped with a durable ripper, the tooth of which confidently cuts rocky and frozen soils. The blade is several centimeters thick and the cutting edge is reinforced with high-strength alloy steel.

Features:

• Weight - 45 t.
• The power unit is a diesel engine with a turbine (volume - 15 liters, power - 420 horsepower).
• Cabin height above the ground – 2.5 m.
• Length/width/height - 9, 03/4, 28/4, 11 m (with attachments).

A feature of this machine is the ability to brake one track, and with the help of the second element to turn almost on the spot, which allows you to operate the equipment in confined spaces.

At the end of the review

Bulldozer equipment "Chetra T-40" rightfully belongs to the representatives of reliable and durable heavy machines of domestic production. In addition, the units are highly maintainable, since many components and parts are universalized with other analogues. The manufacturer continues to work to modernize bulldozers, reduce operating costs, increase operator comfort and ensure continuous use of equipment.