Characteristics of CHETRA T40. Review of the CHETRA T40 bulldozer

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Page Sections

1 DESCRIPTION AND PURPOSE
2 TECHNICAL CHARACTERISTICS 2.1 Overall dimensions (without additional equipment):
2.2 Characteristics of hemispherical blade:
2.3 Characteristics of the ripper:

3 ENGINE

3.1 Characteristics of the Cummins QSK19-C650 engine:

4 CHETRA T40 DEVICE

4.1 Characteristics of the chassis system:

5 PRICE CHETRA T40

Technical characteristics of CHETRA T-40

The CHETRA T-40 bulldozer is assembled at the sites of Promtractor OJSC. As standard, the model has an operating weight of 62,970 kg (SU blade and single-shank ripper). The tractor, equipped with a three-shank ripper, weighs 65,140 kg. The model receives the required power from the Cummins QSK19-C650 engine. This is a 590-horsepower turbocharged unit, the charge air is cooled using the air-to-air type. Fuel injection, as well as engine diagnostics/control, is carried out by the Quantum electronic system. It is worth noting that the bulldozer is equipped with a German AKG monolithic radiator made of aluminum.

The bulldozer is equipped with an Eberspächer liquid heater with automatic control for preheating the cabin and engine. In addition to the fact that this pre-start heater ensures easy starting of the diesel engine in frosty weather, it increases the service life of the power plant. By the way, the Cummins QSK19-C650 engine complies with the Tier 2 environmental standard.

Main engine characteristics

Engine model	Cummins QSK19-C650
Engine power	435 kW (590 hp)
Engine displacement	19 l
Bore/Stroke	159 / 159 mm
Maximum torque	3,118 Nm at 1,500 rpm
Ecostandard	Tier 2
Number of gears (forward/reverse)	3/3
Maximum speed (forward)	12.7 km/h
Maximum speed (reverse)	15.6 km/h

Volume of refueling tanks, weight T-40

Fuel tank	1,200 l
Cooling system	200 l
Hydraulic system	480 l
Standard Operating Weight	62,970 kg
Operating weight with three-shank ripper	65 140 kg

Engine QSK19-C650 Cummins

Six-cylinder four-stroke liquid-cooled diesel engine with gas turbine supercharging and air-to-air charge air cooling, QSK19-C650.

Technical characteristics of QSK19-C650 "Cummins"
Engine displacement	19 l
Bore and stroke	159 mm x 159 mm
Maximum torque	3118 Nm at 1500 rpm
Operating power	435 kW (590 hp) at 2100 rpm

Engine with the Quantum system, containing electronic fuel injection, diagnostics, engine protection and engine management systems. Fuel purification system with filter-water separator “Fleetguard Industrial Pro FH234” and a fuel filter with two replaceable filter elements.

The cooling system consists of two radiator blocks: transmission oil cooling radiators and diesel coolant radiator block for charge air and fuel cooler. Thermal control is provided by a thermostat and a fan. Push type fan. The fan drive is a belt drive through an electromagnetic coupling EM-480.3. A pull-type fan is included. 24-volt electric starting system.

In terms of emission standards, it meets the requirements of EU Stage 11.CARB Tier 2, USEPA Tier 2 standards. To facilitate engine starting in the cold season, a pre-heater is installed on the tractor.

Transmission of bulldozer CHETRA T-40

The CHETRA T-40 crawler tractor is equipped with a hydromechanical transmission. In terms of the design of components such as side clutches and stopping brakes, the T-40 is unified with the T-25 and T-35 bulldozers. These components are technologically similar, the difference is in the number of installed disks (cermet and steel). In addition, when designing transmission units, preference was given to the modular principle (one of the advantages is simplified maintenance). And such a characteristic as the service life of the bulldozer gearbox before overhaul exceeds 15 thousand operating hours (also manufactured according to a modular design).

The manufacturer has developed a new hydraulic control system especially for the CHETRA T-40 bulldozer. It is seriously different from previously used schemes. The gears in the gearbox are engaged by a smooth increase in pressure in the boosters, due to which starting and shifting also became smooth, without unnecessary jolts.

Photo source: chetra.ruTechnical characteristics of CHETRA T-40: weight - 63 tons, power - 435 kW

The planetary gearbox (clutches with a diameter of up to 455 mm operate in oil), the matching gearbox and the main gear are a single power unit, which is located in the rear axle housing. A single-stage 3-element torque converter (its active diameter is 480 mm, and the maximum coefficient Ko = 2.64) is part of a single unit with a pump drive gearbox and is installed on the engine. It is connected to the engine flywheel using an elastic coupling, and to the gearbox through a cardan drive. The method of controlling transmission units is electro-hydraulic, using a microprocessor. The controls are joysticks located in the bulldozer cabin.

Broadcast	Forward travel	Reverse
1	4.2 km/h	5.2 km/h
2	7.7 km/h	9.5 km, h
3	12.7 km/h	15.6 km/h

Reliability

Chetra bulldozers rightfully have a reputation as reliable, durable and high-quality Russian equipment. However, if parts need to be replaced, the interchangeability of components from other Chetra equipment makes it easier to find spare parts during repairs. It is impossible not to notice that the manufacturer, to modernize the equipment, uses developments and individual machine components from other Russian and foreign factories to improve bulldozers, reduce operating costs, ensure continuous operation and operator comfort.

Characteristics of the CHETRA T-40 chassis system

A special feature of the CHETRA T-40 tractor is its slantless suspension system. The bulldozer suspension is three-point semi-rigid with a remote bogie swing axis. The support rollers are mounted on oscillating carriages in pairs with micro-sprung carriages. A transverse balancing beam with shock absorbers and telescopic trolleys are installed. It should be noted that the T-40 is the first heavy CHETRA model to use this type of suspension. Characteristics: reduced dynamic loads on the elements of the bulldozer, a larger area of adhesion between the caterpillar and the ground, smooth running.

Photo source: chetra.ru Photo CHETRA T40

The drive wheels (include 5 segments with 5 teeth) are made of highly hardenable structural alloy steel, which ensures a long service life. To replace one of the segments, it is not necessary to remove the track and track carriage.

The rollers of the CHETRA T-40 tractor (both supporting and supporting), as well as the guide wheels, do not require lubrication during operation; self-clamping double-cone type seals are used. A grease syringe is used to adjust track tension.

Number of road wheels (each side)	6
Number of support rollers (each side)	2
Number of shoes (each side)	40
Link pitch	280.3 mm
Height of lugs	93 mm
Shoe width	610 mm
Supporting surface area	4.61 sq.m
Ground pressure	1.46 kgf/sq.cm

Caterpillar

The use of a new running system on the CHETRA T40 tractor significantly reduces dynamic loads on the components and systems of the machine, ensures smooth running, improves the driver’s working conditions and increases productivity by increasing the traction area of the caterpillar with the ground.

The tracks of the bulldozer T-4001 (K280-22-000-03SB) are prefabricated with one lug and a seal to hold liquid lubricant in the hinge. Track tension is easily adjusted with a grease gun.

Characteristics of the K280-22-000-03SB caterpillar
Link pitch, mm	280
Number of shoes	40
Height of lugs, mm	93
Shoe width, mm	610
Support surface area, m²	4,61
Ground pressure, kgf/cm²	1,46

Hydraulic system

The hydraulic system is a separate unit. Such a characteristic of CHETRA T-40 as the total productivity of gear pumps (there are three in total) is 550 l/min (calculated at an engine speed of 2,100 rpm). Two spool valves are responsible for raising and changing the angle of the blade and ripper tooth. Moreover, they are controlled remotely by a hydraulic servo control system. It is worth noting that the safety valve of the hydraulic system operates at a maximum pressure of 20 MPa (200 kgf/cm2).

Spool sections	Distributor spool position	Number of cylinders	Bore/Stroke
Blade lift	Raise, neutral (hold), lower, float	2	160 / 165 mm
Blade misalignment	Right, neutral, left	1	250 / 240 mm
Changing the cutting angle of the blade	Stepless angle adjustment	1	220 / 240 mm
Raising the ripper	Raise, Neutral, Lower	2	220 / 520 mm
Changing the cutting angle of the ripper	Stepless angle adjustment	2	220 / 485 mm

dimensions

The dimensions of the bulldozer CHETRA T-40, T-40.01 are presented by the following characteristics:

Dimensions CHETRA T-40.01
Length, mm	9401
Width with blade, mm	4730
Height, mm	4304

Overall dimensions of CHETRA T-40.01.

Working equipment

The CHETRA T-40 crawler tractor in the basic version is equipped with a hemispherical blade and a single-tooth ripper. Optionally, the bulldozer can be equipped with a ripper with three teeth. It is worth noting that maximum force is provided to the blade blade through the use of diagonal traction when transmitting lateral forces from the blade to the left frame side member.

Technical characteristics of the SU blade

Length height	4,730 / 2,654 mm
Capacity	21 cu. m
Lifting height	1 500 mm
Maximum depth	750 mm
Maximum skew	±13°
Weight	10,310 kg

Technical characteristics of single-shank ripper

Ripper type	Unregulated
Weight	6,150 kg
Maximum lift height	1,080 mm
Maximum depth	1,520 mm
Maximum pullout force	74.7 T
Maximum penetration force	21.6 T

Technical characteristics of three-shank ripper

Ripper type	Multi-toothed
Weight	8,316 kg
Maximum lift height	1,074 mm
Maximum depth	1,020 mm
Maximum pullout force	74.7 T
Maximum penetration force	21.6 T

DESCRIPTION AND PURPOSE

CHETRA T40 is the heaviest bulldozer mass-produced in Russia. Despite the huge mass, the equipment is easy to operate and does not require special skills. Passive safety elements provide operator protection when working in mines, quarries and other difficult conditions. The carriage-type chassis, together with a huge blade and a powerful engine, provides optimal traction parameters.

CHETRA T40 represents a relatively new line (Cheboksary), introduced in 2002. In a short time, the model showed itself excellently in the domestic and foreign markets.

The bulldozer is intended for operations that require increased energy consumption. The machine is used to move heavy soils in pits and quarries, in mining, when laying pipes in the gas and oil industries, and in mining. The model is also used in construction and road construction (at large facilities). This series is less in demand among agricultural enterprises.

The CHETRA T40 family is presented in 2 versions, the differences between which are in the design and type of equipment used:

CHETRA T40.01KBR-1 – modification with a Cummins QSK19-C650 unit, a hemispherical blade and a single-tooth ripper (operating weight – 62970 kg);
CHETRA T40.01KBR-1-01 – version with a Cummins QSK19-C650 unit, a hemispherical blade and a three-tooth ripper (operating weight – 65140 kg).

Standard and optional equipment

In the standard version, the CHETRA T-40 bulldozer is equipped with two rechargeable batteries of 12 V each (190 Ah), a decelerator, a lighting system, a front tow hook, a muffler, a starter, a parking brake, power transmission and motor protection, replaceable ring gear segments, a hydraulic device for the track tensioning mechanism and an alternating current generator (75 A). The cabin, in turn, is equipped with an adjustable driver's seat, a seat belt, a ROPS/FOPS protective structure, two 24 V sockets (including for external power), an electric hour meter, a cabin heating fan, a sound signal, an air cleaner and a cigarette lighter.

On the instrument panel, the operator can monitor indicators such as engine speed, oil pressure, on-board voltage, fuel level, as well as the temperature of the coolant, engine oil and transmission.

Photo source: chetra.ru Photo CHETRA T-40

If the CHETRA T-40 bulldozer is planned to be used in harsh climatic conditions, additional equipment is provided for it. It includes a cabin heater, which is powered by power plant coolant, engine radiator shutters and an insulating cover. In addition, there are three options for a pre-start liquid heater: Hydronic 35, Hydronic M-II or PZhD 30L, as well as the installation of an independent cabin air heater Airtronik-2D. Its heating output is 2,200 W, and its fuel consumption is 0.28 kg/hour.