Tractor K744 "Kirovets" - Specifications. Tractor K744 "Kirovets" - Technical characteristics Kirovets p2
Kirovets K 744 has been produced since 1995 by the St. Petersburg plant. This subsidiary of the Kirov Tractor Plant has retained all the technical characteristics of the famous series of heavy tractors. The machine was created with the involvement of German engineers, which could not but affect the functionality and comfort of the tractor. The model K 700 M1 was taken as a basis, which ceased to meet modern requirements and therefore needed a worthy replacement.
Features of the machine
The Kirovets K744 tractor has the fifth traction class. The machine is designed for multifunctional use... The technique worked well and therefore the series was continued.
In total, four versions of the K-744 tractor came off the assembly line of the plant. The performance of the entire model range is greatly influenced by the installed powerful engine. Thanks to the power plant, the equipment can work without problems with various attachments.
Kirovets K-744 P1 The fourth generation of Kirovets tractors can be found on construction and mining sites, logging, and on various road works.
V agriculture, tractors of this class are irreplaceable. With one tractor from this series, about 5,000 hectares can be cultivated and sown. Which provides significant savings. It is worth noting that the machines are adapted to various climatic conditions, therefore they can be used in all regions of the country, at any time of the year.
Technique device
The first machines of the Kirovets K-744 series were equipped with YMZ-238ND5 turbocharged eight-cylinder engines. This four-stroke unit is complemented by a cold start system and a radiator with a water-in-oil cooling circuit.
The power plant has a power of 300 horsepower at a crankshaft speed of 1900 rpm. Fuel consumption at peak power is 174 g / l hour.
The volume of the fuel tank is 630 liters. This allows the machine to work for a long time without refueling, which is very important for remote fields and construction sites.
The transmission includes a 24 speed gearbox. The available gears are divided into four ranges: 16 forward and 8 reverse. The gearbox (gearbox) belongs to the Powerschift class, which means power shifting of gears.
To change the speed mode without losing power, hydraulic control is provided. The work of the attached and trailed equipment is ensured by the hydraulic system, which consists of an axial piston pumping station and a five-circuit hydraulic valve. The pump capacity is 180 l / min.
Kirovets K-744 The K 744 tractor is equipped with an articulated frame. This gives the machine greater stability and increased cross-country ability on difficult terrain. To prevent damage to the fertile soil during agricultural work, twinning of the wheels and the possibility of reducing the pressure in the tires are provided.
The design features of the frame provide the vehicle with good maneuverability, the turning radius is 7.9 meters. To improve the balance of the machine and better grip on the ground, additional weights are installed on the half frames.
The tractor has two driving axles, which are made of high-strength steel. Of the features of the chassis, a self-locking differential and planetary-type final drives can be noted. A rigid suspension type is used for each axle. The pneumatic system provides separate control of the braking system of axles and trailed equipment.
The cab is made in full compliance with international standards. There is a heating and air conditioning system. The steering column and operator's seat can be adjusted in several positions, depending on the weight and height of the driver.
The panoramic view provides a large glass area and a central position of the operator's seat. The cab has good air tightness, which provides reliable sound insulation.
Pleasantly pleased with the plastic trim inside the cab and the modifiable roof structure. The operation of all systems is monitored by an on-board computer, which displays the necessary data on an informative display.
Equipment used
The K-744 tractor has a three-point attachment attachment scheme. A pendulum mount is provided for trailers. Here is a list of equipment aggregated to the tractor:
Mods overview
Kirovets K-744R has become a worthy continuation of the series. There were three cars with this index: Р1, Р2 and Р3. Each of these models has minor differences from the basic version. Of the main features, the engine can be distinguished, which began to produce even more power.
The Kirovets K-744R tractor, like its prototype, was equipped with a YaMZ power plant, only of another series - Cummins 300. This gave a little more horsepower - 306, and allowed an increase in torque to 2000 rpm.
A Mercedes engine was installed on the Kirovets K-744 P2 and K-744 P3 cars. Both cars have a lower crankshaft speed of 1800 rpm. But the power plants assembled according to German technology have more power - 354 and 401 hp.
In each car from this series, the designers have made some changes that affect not only the functionality, but also the comfort of the machines. Here are some of them.
Kirovets K-744R rolled off the assembly line with the sprung suspension of the front axle. The cab has been reinforced with a sturdy frame. In addition, fuel consumption has been reduced in contrast to the basic version.
The next tractor in the series, K-744 P2, had a fundamentally different engine, which made it possible to significantly increase the power of the equipment.
Kirovets K-744 P3 is the final and, accordingly, the most powerful vehicle in the series. Here, a different type of hydraulic valve was used and it is possible to install additional ballast.
Kirovets K-744 P2 Advantages and disadvantages
The Kirovets K-744 tractor and its subsequent modifications confidently occupy a leading position among heavy vehicles of this traction class. There are a number of reasons for this:
- the machine has a large margin of safety. Manufacturers guarantee 2000 hours of trouble-free operation of equipment. In fact, this indicator can be safely multiplied by 3. Due to the thoughtful design and quality of the parts used in the assembly, the equipment very rarely fails;
- a comfortable cabin, together with a spacious fuel tank and minimal fuel consumption, provide up to 14 hours of continuous operation. During this time, the equipment can be operated at maximum power;
- availability and interchangeability of spare parts and main working units;
- great functionality of the machine. Using additional equipment, the tractor can play the role of a road roller or a loader;
- thanks to the powerful generator, the tractor can be used for welding.
The tractors of the Kirovets family are favored by the fact that European farmers prefer to buy these very machines, often ignoring their manufacturers.
Available for the car and limitations... Despite the use of low pressure tires, the tractor damages the fertile soil layer. All the same, the weight of the equipment is rather big. Therefore, for agricultural work, Russian farmers prefer to use lighter equipment.
In addition, when machines operate with attachments, power losses are noted. The flawed hydraulic system is to blame for this. To cope with this problem, it is necessary to purchase and install sensors that monitor oil loss.
For processing large volumes of agricultural land, tractors of increased power are used. One of them is the domestic tractor K 744. One such tractor cultivates up to 5,000 hectares of land in one season. The machine is used not only in agriculture, but also in other fields of activity. Using the K 744 tractor, you can clear the cover from the snow massif, tow heavy loads, etc.
History of creation
The Kirovets K 744 tractor has been produced at the St. Petersburg Tractor Plant since 1995. The development of the machines was jointly carried out by Russian and German designers, and the first models were manufactured exclusively for export. In 2000, the St. Petersburg Tractor Plant began mass production of K 744R machines intended for the domestic market and for sale to the Allied countries.
Since 2002, the Kirovets K 744 tractor has replaced previous models such as K 701, K700, K703. 2014 was the year of complete modernization of the Kirovets K 744 tractor. Several modifications of this machine are produced at the St. Petersburg Tractor Plant. Since 2016, the model has been equipped with an automated gearbox of its own production.
Technical characteristics of the K 744 tractor
The K744 tractor, depending on the modification, is a tractor of 5-8 traction class. The machine performs a wide range of works in agricultural, industrial, municipal and other fields of activity. Kirovets has technical characteristics, thanks to which, it is not inferior to foreign counterparts of its class, and even surpasses them in some technical indicators.
Dimensional and weight parameters
As standard, the K 744P1 tractor has the following dimensions and weight:
- Machine length - 7100 mm. The total length is taken into account with the hinge in the raised position;
- Tractor width - 2865 mm;
- Height from the ground to the upper edge of the exhaust pipe - 3845 mm;
- Machine clearance at the hinge axis - 460 mm;
- Wheelbase (distance between front and rear wheels) - 3750 mm;
- Tractor track width 2115 mm;
- Turning radius (on the outer wheel) - 7980 mm;
- Wheel size - 28.1 R26;
- The total weight of the equipped vehicle with single wheels is 14,000 kilograms;
- Tractor weight with twin wheels - 15790 kilograms;
- Front axle weight - with single wheels - 8100 kg, with double wheels - 9000 kg;
- Rear axle weight - with single wheels - 5920 kg, with a set of doubling wheels 6790 kg;
Power unit
Depending on the modification, power plants of both domestic and foreign production are installed on the Kirovets K744R tractor:
- K 744R1 - equipped with domestic YMZ 238 (300 horsepower), or foreign Cummins (306 hp);
- K 744R2 - TMZ (350 hp), or Mercedes (350 hp);
- K 744R3 - TMZ (390 hp), or Mercedes (401 hp);
- K 744R4 - TMZ (420 hp), or Mercedes (428 hp).
Models of the "standard" group are equipped with domestic units. Foreign engines are installed on cars belonging to the "premium" group.
Each of the above engines is a turbocharged diesel unit with enough power to spare for multi-purpose vehicle use. The engines are equipped with a combined cooling system (oil - water), which allows the tractor to be used when high temperature environment.
To improve start-up in winter time preheaters are installed on power units. The engine is started using an electric starter. The engines are easy to operate and unpretentious to weather conditions. They have a long service life, a low vibration level, and meet international standards for harmful emissions into the atmosphere. You can also read about.
Cab and steering
To reduce operator fatigue during long-term work, the K 744P tractor is equipped with a comfortable cab. It is located at a high height, giving the operator a large viewing angle. Good tightness protects the interior from dust during operation. The air temperature in the tractor compartment is regulated by an air conditioner and autonomous heating. This makes it possible to use the tractor in any climatic conditions. The design of the cab includes specialized protection that minimizes the risk of death of the tractor driver when the machine rolls over.
The cab has two seats for the tractor driver and the passenger. For convenience, the operator's seat is height adjustable. The machine control levers are located in close proximity to the seat. This creates comfort for the operator when operating a multi-ton machine.
The cab contains the following controls:
- Joystick for gear shifting;
- Pedals;
- Steering column. The steering wheel is height adjustable;
- Switches for wipers, headlights, air conditioning, horn, etc .;
- Tractor hydraulic control levers.
Behind the steering wheel is a block of instruments, warning lamps and an on-board computer. The instrument panel allows the operator to control the operation of the tractor systems and mechanisms.
Chassis and transmission
The K 744 tractor has a four-mode T5 automated gearbox. It has 16 forward gears and 8 reverse gears. The switching of modes is carried out by a pneumatic drive. The gearbox device allows you to switch modes under load without reducing the engine speed. The gearbox is controlled using a joystick and buttons located on it.
The torque from the checkpoint is transmitted through the cardan shafts to the drive axles. The tractor has two drive axles with self-locking differentials. The rear axle is rigidly fixed to the frame. The front is mounted on a leaf spring suspension. Rear axle drive is switchable. To improve the traction performance of the tractor, and to reduce the load on the power unit, the torque is transmitted to the wheels through reduction gears.
The tractor frame consists of two parts, connected by a hinge. Rotation of the machine is carried out by means of offset, hydraulic cylinders, rear of the frame. This design makes it possible to reduce the turning radius of the tractor.
Brake system
The K744 tractor is equipped with a pneumatic braking system consisting of:
- Belt driven compressor. Used to pressurize compressed air into receivers;
- Air receivers (cylinders). They serve to store a supply of air under pressure sufficient to supply the system;
- Safety valve. Necessary to protect the system from excessive pressure build-up;
- Brake valve. It is used to control the brakes of the tractor and trailer;
- Hoses and pipelines;
- Brake chambers. They act on the wheel braking mechanism under compressed air pressure. Cameras are rigidly attached to the tractor axles.
The operator controls the braking system by pressing the pedal in the cab. A connecting head is installed on the K 744. It is necessary for connecting the air lines of the tractor and trailer. If the hitch breaks, the coupling head disconnects the lines, preventing air leakage from the tractor brake system.
Tank volume and fuel consumption
With high power ratings, the car has low fuel consumption. It is 162 grams per horsepower per hour. The volume of the tank for storing and transporting fuel is 640 liters. This amount of diesel fuel is enough for 9-13 hours of continuous operation.
IMPORTANT: Fuel consumption directly depends on the type of attachment. The higher the engine load, the greater the fuel consumption.
Attachments
A hydraulic system with a five-section distributor is installed on the Kirovets. The hydraulic system has a capacity of 180 l / min. As standard, the K744 is equipped with a three-point linkage with a quick hitch system.
Various equipment can be installed on the hitch:
- Trailers of any type;
- Swivel and non-swivel plows;
- Soil rippers;
- Cultivators;
- Seeders and more.
ATTENTION: The three-point hitch of the Kirovets K 744 tractor meets international standards. This makes it possible to connect equipment of not only domestic but also foreign production.
Advantages and disadvantages
The Russian-made Kirovets K744 tractor has a number of advantages:
- The quality of the components. The frame and parts of the tractor are made of high-strength materials. This greatly extends the service life of the machine;
- Power point. The engine installed on the K744 has high power and unpretentiousness to the conditions of use;
- Big tank. Fuel capacity enables the tractor to work for a long time without additional refueling;
- Multifunctionality. Thanks to the universal trailed equipment, you can use the machine in various fields of activity;
- High cross-country ability. K744 easily overcomes impassable sections of rough terrain, thanks to the all-wheel drive, and self-locking axle differentials;
- Maneuverability. The split frame allows the machine to be used on land plots with limited area;
- Comfort and safety. The redesigned cab reduces operator fatigue and makes working more comfortable;
- Attractive price. Compared to foreign counterparts, Kirovets, not yielding in technical characteristics, is much cheaper.
The disadvantages of the model include high pressure on the soil. This is due to the large mass of the machine. To eliminate this disadvantage, manufacturers equip the tractor with low pressure tires. To reduce the pressure on the ground, it is possible to install a kit for doubling the wheels.
Modifications
K744 is produced by the manufacturer in 4 versions. Each differs in the power of the power unit. Each of the modifications will be briefly described below.
K744R
The model is equipped with a 306 horsepower diesel unit. The number of revolutions of the crankshaft rotation is 2000 rpm. The front axle of the machine is mounted on leaf springs.
K744R2
The Kirovets K744R2 tractor is equipped with a German-made power plant. The device of the gearboxes of the K744R2 tractor of the planetary type. This makes it possible to significantly increase the traction characteristics of the machine.
K744R3
Has technical characteristics identical to the previous model. The manufacturer replaced only the power plant with a more powerful one.
K744R4
The K744R4 tractor, the technical characteristics of which have been improved in comparison with the previous modifications, completes the model range. The K744R4 tractor is equipped with a 420 horsepower engine.
REFERENCE: Each modification can be additionally equipped with:
- A set of tires;
- tracked kit;
- a set for doubling wheels, etc.
Kirovets K 744 is a productive Russian tractor that is still in demand in the post-Soviet space. The machine is widely used in farming, industry, construction and any other national economy. The machine can be aggregated with a variety of attachment options. The equipment has been modernized several times, and is still being produced in an updated form. The tractor is assembled in St. Petersburg at the "Kirovsky Zavod". Note that today this enterprise is considered the only plant in Russia for the production of heavy agricultural machinery. The Kirovets K 744 model is the latest car of a well-known company from St. Petersburg. The tractor turned out to be so popular that it was possible to arrange supplies to the foreign market. This tractor has a large set of advantages and capabilities, which we will consider in this article.
Navigating the article
Description and purpose
Kirovets K-744 is a high-performance machine, on the assembly line since 1995. Since 2002, the Kirovsky plant began to produce only this model, but in several versions. In this regard, the previous machines K-700, K-701 and K-703 were removed from the assembly line for obvious reasons. On the this moment K-744 has four modifications. The tractor received the last major update in 2014. The upgraded machine is distinguished by higher traction characteristics, a modern cab, made in accordance with the requirements of comfort and safety, as well as multifunctional hydrostatic steering equipment. The Kirovets K-744 model is widely used mainly in agriculture. This tractor is aimed at a mass audience. It is often purchased by large logging companies, as well as utilities, builders and private entrepreneurs. In farming, this device is in demand in such operations as plowing the soil in various ways, towing trailers, loading and unloading. In construction and communal services, equipment is used as a loader, in repair and installation work. In road construction, the tractor mainly transports heavy loads, including concrete structures, since the machine has a high carrying capacity. The machine is perfectly adapted to harsh weather conditions. So, in agriculture, this is one of the few machines that is capable of a short time completely cultivate an area of up to 5 thousand hectares.
Technical characteristics K 744
- Traction class - 5
- Tractor weight - 13.4 tons
- Sizes, mm: Length - 7050, Width - 2865, Height - 3690
- Track width - 2115 mm
- Wheelbase - 3200 mm
- Turning radius - 7200 mm
- Engine type - 4-stroke 8-cylinder turbocharged diesel engine, YaMZ-238ND5
- Power - 279 horsepower
- Crankshaft speed - 1900 rpm
- Average fuel consumption - 237 g / kWh
- Fuel tank capacity - 640 liters
- Transport speed - 30 km / h
- Tire sizes - 28.1R26
- Alternator parameters - 2 kW
- Oil tank volume - 125 liters
- Power take-off shaft (PTO) - 155 HP With.
- The lifting capacity of the main hitch is 8500 kg.
Features of the device and characteristics
The Kirovets K-744 tractor can be equipped with the following attachments:
- Multiple plows
- Seeders
- Disc harrows
- Subsoilers
- Cultivators.
If necessary, the tractor can be equipped with different seeders - both mechanical and pneumatic. In addition, the tractor supports and different types cultivators - combined, disc, paw and other modifications. As for the plow, this tool in the K-744 tractor can be used in two versions, which differ in the method of tillage - both with turnover and with crumbling of the soil layer.
The Kirovets K-744 tractor has a simple and reliable design. During the creation of the machine, the developers eliminated the shortcomings of their predecessors, and maximally adapted the tractor to domestic conditions.
In particular, Kirov engineers took into account the following factors:
- Adaptation to low-quality diesel fuel
- Highly developed service base throughout the country, with the necessary spare parts
- Adaptation to any type of soil, including hard virgin soil.
The tractor is notable for its good maintainability, especially against the background of its foreign competitors. To produce Maintenance machines can even be a novice worker. To maintain the machine in working order, the experience and strength of our own auto repair shops, which are in agriculture, are enough.
- The Kirovets K-744 tractor has received an extensive engine range, consisting of domestic and imported diesel engines. In particular, it comes mainly about engines produced by YaMZ, as well as Mercedes-Benz and Cummins. They differ in power. The most basic version has a YaMZ engine with a capacity of 300 forces, and the most productive one is equipped with a Mercedes-Benz engine with a return of 428 hp. With. However, the most equipped version with the Russian YaMZ engine develops almost the same amount - 420 hp. With. Wherein maximum speed electronically limited to 30 km / h, and the speed when reversing reaches 20 km / h. It should be noted that Kirovets K-744 with Russian engines belongs to the "Standard" group, while modifications with imported internal combustion engines are positioned in the "Premium" group.
- Kirovets K-744 is a multipurpose wheeled tractor with two drive axles, one of which (rear) can be turned off if necessary. So, at the heart of the front axle is a suspension with semi-elliptical springs and hydraulic shock absorbers. The rear axle is rigidly attached to the frame for added strength. As for the tires, tires with a dimension of 30.5R32 are suitable for such a tractor. The gearbox is a manual transmission with 16 forward and 8 reverse gears. The braking distance from a speed of 30 km / h is 13 meters.
- Kirovets K-744 received a well-thought-out hydraulic system, as well as a reliable and convenient hinged three-point device. Its carrying capacity is 8.5 tons. The hitch is driven by a Bosch five-section spreader. In addition, the structure of the hydraulic drive is reinforced with a drawbar and a hydraulic hook. To connect attachments, six breakaway couplings are used, which are located on the rear frame. The basic version of the piston system has a capacity of 180 liters. With.
- The Kirovets K-744 tractor turned out to be very compact, and this had a positive effect on the maneuverability and ease of operation in confined conditions. So, let's pay attention to the dimensions - the length is 7.5 meters, and the width with the edges of the wheels is about 3 meters. Ground clearance of 520 mm, large wide-profile wheels, minimal body overhangs and powerful motor protection, coupled with all-wheel drive, allow you to overcome any off-road obstacles.
- The machine is equipped with a cab with the highest level of comfort. It is noteworthy that the cabin is so spacious that it was made for two. The driver and his assistant can appreciate the spacious and functional interior with an integrated frame, thanks to which the cab will not buckle if the tractor rolls over. This greatly improves safety. For coziness and comfort, multilayer sound and heat insulation is responsible, which helps to reduce noise and vibrations. There is also air conditioning and heating, which keep it warm or cool depending on the season. Wide visibility is ensured by a wide glazing area. There are also sun visors in the cockpit. Moreover, latest modifications The Kirovets K-744 tractor can be equipped with the GLONASS navigation system, as well as a large number of adjustments to the driver's seat and steering column, as well as a medical system with acoustic speakers.
- As additional equipment, the manufacturer offered an additional set of wide-profile tires, a more powerful power take-off shaft, tracked chassis, additional wheels for double chassis, as well as a swing trailer. The service quality of the tractor meets all international standards, and is no different from more expensive foreign competitors.
Photo K 744
A line of 4 models of heavy tractors K-744r has been developed and manufactured by JSC Petersburg Tractor Plant.
The machines belong to the 5th modification of agricultural traction units with high parameters of functionality, productive work and efficient operation.
Purpose and features of the machine
Wheeled tractor for use in an agricultural complex with a power plant capacity from 300 to 480 liters. With. It is used in conjunction with trailed agricultural complexes and implements.
The power of the power plant allows you to process wide (8-12 m) crop planting strips at high speed, tow heavy trailers, and efficiently use additional attachments (dozer blades, universal loading buckets).
Sufficient parameters of cross-country ability and maneuverability, ease of maintenance, reasonable prices of a new machine and cost of operation make the K-744r an effective traction unit in agriculture, road and industrial construction, and the transport sector.
The tractor is especially effective for use in conditions of large land holdings and for large-scale work on construction sites.
The tractor is designed to work in the conditions of Russia with its heavy soils, low quality fuel and lubricants, an undeveloped network of rural maintenance centers. In these conditions, the following is important:
- spare parts and consumables are not in short supply and are affordable;
- maintenance and repair flow charts have been sufficiently studied by service workers;
- simple and reliable design of the machine, allowing the possibility of maintaining the working condition of the equipment by means of its own mechanical service of farms;
- provided the opportunity to participate in federal, regional and municipal financial support programs;
- use of direct communication with the manufacturer.
Important! Powerful and economical power plants produced by YaMZ, TMZ, Mercedes-Benz, Cummins provide a torque reserve of more than 30%.
Turbo engines are equipped with a starting system in winter period cool effectively under load.
Mechanical transmission device 4-mode with power switching hydraulics allows you to select the operating speed of the unit without interrupting the power flow.
Traction drive to all wheels, the design of the differential and final drives of both axles, wheels with a high profile, allowing the possibility of doubling, provide passability on wet soils and high traction parameters.
The structure of the power frame is such that the wheels follow the soil relief, excluding significant longitudinal and transverse movements of the machine body. The power elements are designed for use with heavy attachments.
Attachment with three-point attachment, complete with EHR-position control device. The type of the trailing mechanism is pendulum.
Work equipment hydraulics system (GDO) with capacity control according to load parameters (LS-system).
The brake mechanisms work separately on the wheels of the tractor axles and on the trailed transport equipment. Three-circuit pneumatic drive system.
Modern solutions in the ergonomics of an all-metal cab with a safety cage, selection of the position of the operator's seat, good overview working area, the presence of heating and ventilation devices.
Technical and operational parameters of modification "-1"
| Power point | Turbocharged diesel engine |
| Model designation | 238ND5 |
| Number of cylinders and their arrangement | 8 in V-block |
| Power parameter at 1,900 shaft revolutions (nominal), kW | 220 |
| Torque value, N * m | 1 280 |
| Engine manufacturer (brand) | YaMZ |
| Gearbox type | Mechanical |
| Number of ranges / modes | 4/16 8 ago |
| Fuel tank, l | 800 |
| Speed in transport mode, km / h | Up to 29 |
| Distance between axles (base), mm | 3 750 |
| Dimensions by dimensions, mm | 7 350x2 865x3 846 |
| Electrical parameters | Single-wire network 24 V with negative ground, 2 batteries for 12 V, connected in series, total capacity 190 A / h |
| Track dimensions of both wheels, mm | 2 115 |
| Turn on the outer front wheel, mm | 7 900 |
| Attachment load, kg along the suspension axis 610 mm from the axis along the knot |
Nodes and mechanisms
Diesel produced by JSC Avtodiesel with a power of 220 kW at 1,900 rpm with a liquid-type cooling system:
- arrangement of 8 cylinders V-shaped, displacement 14.86;
- direct fuel injection;
- mechanical speed control;
- specific fuel consumption in grams per kilowatt / hour of power 220;
- supercharging according to the "turbine and intercooler" scheme.
Transmission... The mechanical device provides a change of 4 ranges of torque parameters without breaks in the power flow. Gearbox gears are structurally reinforced in terms of strength. Drive shafts of power axles manufactured by GЕWЕS.
Transmission with a hydraulic drive for power switching. The 4 ranges allows you to select one of 16 modes for moving forward and 8 backward.
Axles - both with drive, rear shutdown is provided. The device of the interwheel differential mechanism is a self-locking clutch with a free wheel. The final drive is provided by a planetary gearbox.
Suspension axle on springs, with telescopic shock-absorbing devices of hydraulic type. The load axle is suspended rigidly from the frame.
Working equipment hydraulic system (GDO)
The tractor is equipped with a GDO - LS-system with an axial piston pumping unit and two pressure filters, forming an adjustable, depending on the load, flow of the working fluid and providing:
- flow volume 180 l / min;
- pressure parameter at the quick coupling output coupling 185 bar;
- the maximum pressure in the gas distribution system is 210 bar;
- 4 pressure outlets for connection to the systems of aggregated implements;
- available free drainage and drainage of the gas distribution system, allowing to exclude the loss of the working fluid and its overheating.
To reduce peak loads in the system, a hydroaccumulator device is installed in the "spool - working equipment" line.
The Bosch-Rexroth hydraulic valve is cabled from the cab. The output units of the GDO are brought out to the rear semi-frame and are equipped with quick-connect breaking devices.
Implement movement control
The steering wheel acts on the DANFOSS hydraulic steering system with a separate pumping unit. The steering column is adjustable in tilt angle and height.
The pneumatically controlled Wabco brake system has three circuits: two act on the brake drum pads of the tractor wheels, one on the trailed vehicle.
The front axle is equipped with a spring-type parking brake.
Operator's cab
The lineup
| Model designation K- | Differences in the basic configuration | ||
| Power point | Tires | Weight, kg) | |
| Completion "Standard" | |||
| 744-p1 | YaMZ (300 hp) | 28,1R2 | 14 900 |
| 744-P2 | TMZ (350 HP) | 30.5R3 | 15 680 |
| 744-p3 | TMZ (390 hp) | 30.5R3 | 17 500 |
| 744-p4 | TMZ (420 hp) | 30.5R3 | 17 500 |
| Package "Premium" | |||
| 744-p1 | Cummins (306 HP) | 28,1R2 | 14 370 |
| 744-P2 | Mercedes (354 HP) | 30.5R3 | 15 220 |
| 744-p3 | Mercedes (401 HP) | 30.5R3 | 17 000 |
| 744-p4 | Mercedes (428 HP) | 30.5R3 | 17 000 |
Optional equipment kits
Aggregated agricultural machinery
- Sowing equipment: mechanical seeders, connected in modules with a total length of up to 12 m; pneumatic complexes performing several agro-operations per pass.
- Cultivating equipment for weed control, loosening of the soil surface, mulch distribution, leveling and controlled compaction of the surface layer of the soil. Connection into modules with a total length of up to 12 m is possible.
- Harrows of various types for loosening and preparing the soil layer before sowing, destroying weeds. Connection into modules with a total length of up to 12 m is possible.
- Plow devices of various designs for preparing the soil for sowing. The number of plows per body is from 8 to 14.
Price
Prices for new cars in a standard version, depending on the model, range from 5.1 to 7.6 million rubles. The price parameter for a used car is 4-5 times lower and depends on the number of operating hours and the general condition of the tractor.
Tractors of the heavy series "Kirovets" K-744r in most technical and operational indicators are close to the units of the leading tractor-building companies in the world.
The benefit of purchasing them is half the price, low operating costs, and adaptability to Russian conditions.
And in conclusion, let's see a video review of this tractor:
The K-744R tractor differs from the K-744R1 and K-744R2 tractors in the base, the engine unit, the frame, the shape of the wings and the absence of front axle springs.
The K-744R1 / P2 tractors are unified among themselves and differ in the design of the engine part, the radiator block and the steering hydraulic system.
The K-744R3 tractor has an increased weight due to the installation of ballast, as well as a modified design and hood lining.
The tractors are equipped with a four-stroke eight-cylinder V-shaped engine:
- YAMZ-238ND5- on tractors K-744R, K-744R1;
- 8481.10 - on the K-744R2 tractor;
- 8481.10-02 and 8481.10-04- on the K-744R3 tractor.
At the request of the consumer, the OM457LA engines (Daimler Chrysler) can be installed on the K-744R2 K-744R3 tractors.
The engine is started by an electric starter. To facilitate starting at low temperatures, the tractors are equipped with a pre-heating system.
Air purification system - dry, two-stage, combined, with dust suction into the exhaust pipe.
The K-744R3 tractors use a Donaldson air cleaner with a higher dust capacity.
To reduce contamination of the air cleaner, K-744 tractors of the "P" series are equipped with an extended air intake pipe.
ATTENTION! The installation of this pipe on the tractor must be carried out in such a way that the maximum height dimension of the tractor does not exceed 4 meters from
support surface.
The engine cooling system is closed, with a compensation circuit, with forced circulation of the coolant. To maintain optimal thermal conditions, diesel engines YaMZ-238ND5 and 8481.10 are equipped with an automatic fan control system. At the same time, on the YaMZ-238ND5 engine, the fan control solenoid valve is additionally equipped with a hexagonal screw for mechanically turning on the fan.
In emergency mode (if the solenoid of the valve is out of order), to forcibly turn on the fan, the hex screw must be screwed into the valve body until it stops.
When the fan is operating in automatic mode, the hex screw must be unscrewed as far as it will go. The solenoid valve is located behind the fan drive pulley (under the generator).
ATTENTION! Do not fill the engine cooling system and heating system with water.
The fuel system consists of a fuel tank, a manual fuel priming pump, coarse and fine fuel filters, a fuel priming pump, fuel pump high pressure with all-mode speed regulator, automatic fuel injection advance clutch, low and high pressure fuel lines and injectors. Gas exhaust system - with one muffler and connecting pipes.
The tractor transmission includes a semi-rigid coupling and a pump drive reducer, a gearbox, a cardan drive, an intermediate bearing and drive axles.
A semi-rigid coupling and a pump drive gearbox are used to transfer torque from the engine to the gearbox. The gearbox also drives the pumps for the steering hydraulic systems and the attachment.
The tractor is equipped with a mechanical control system for changing the gearbox modes.
Transmission- mechanical, multistage, four-mode, with constant mesh gears, with a mechanical drive for switching modes and hydraulic gear shifting without interrupting the power flow within any of the modes. Allows you to change the speed of the tractor, move in reverse, turn on the rear drive axle, transmit torque to the power take-off mechanism (PTO), start the engine from the "tug", and also drive the steering pumps from the wheels when towing a tractor with a faulty engine ...
Cardan transmission consists of a propeller shaft of a gearbox, a propeller shaft of the front axle, an intermediate shaft of the rear axle, an intermediate support and a propeller shaft of the rear axle.
An intermediate bearing connects the drive shafts, which transmit torque from the transmission camshaft to the rear axle.
Both axles of the tractor are leading and serve to increase the torque supplied to them from the gearbox and transfer it to the wheels. On tractors K-744R1
and K-744R2 the front drive axle of the tractor is suspended from the frame on two semi-elliptical
springs with telescopic hydraulic shock absorbers. On the K-744R tractor, the front drive axle is rigidly attached to the frame. Rear axles of all tractors are attached to the frame
hard.
Service brakes- dry, shoe type, with separate pneumatic drive to the front and rear wheels, installed in the final drives of the driving axles.
Parking brake - with a pneumatic spring accumulator, combined with pneumatic chambers of the front axle.
On both drive axles, wheels with low pressure tires. On tractors K-744R, tires 28.1R-26 of the FD-12 model are installed; on tractors K-744R1 - tires 30.5R-32 model F-81 or 28.1R-26 model FD-12; on tractors K-744R2, K-744R3 - tires 30.5R-32 of the F-81 model.
Tractor steering control system - with power drive.
The tractor is rotated with the help of two hydraulic cylinders due to the rotation of the tractor half-frames relative to each other, around the vertical hinge. Proportional to the angle of rotation and the speed of rotation of the steering wheel, the supply of working fluid to the hydraulic cylinders is carried out metering pump and flow amplifier(on the K-744R2 tractor) or hydraulic steering (on the K-744R, K-744R1 tractors).
The hydraulic system of the working equipment on tractors can be equipped with a gear pump or a pump with a variable flow rate.
On tractors K-744R, K-744R1, a priority valve is installed to unload the steering pump and additional supply of working fluid to the steering control system from the pump of the working equipment system.
Two pressure filters provide cleaning of the working fluid flowing from the pumps to the hydraulic system units.
The hydraulic diagrams of the steering and attachments are given in Appendices 2, 2A and 2B.
The frame consists of of two semi-frames: front and rear, connected by a hinge device. Semi-frames can rotate relative to each other around horizontal and vertical hinges.
Cabin- with a built-in protective frame, all-metal, double, sealed, with heating, ventilation and air conditioning, with heat-absorbing tinted glass. The inside of the cabin is lined with thermal and noise insulating material.
The cab has two seats fitted with seat belts. The driver's seat is sprung, adjustable in height, backrest angle, in the longitudinal direction and depending on the driver's weight.
Steering column has five fixed positions: a nominal position at an angle of 25 ° to the horizon, three - every 5 ° from the nominal position when tilted "towards you" and one - "away from you".
The tilt angle is changed with the pedal depressed, located at the base of the steering column.
Adjustment of the steering wheel in height is carried out with the flywheel turned out 2-3 turns, located in the center of the steering wheel.
The pneumatic double-circuit system provides simultaneous operation of the brakes of the tractor and trailers, manual control of the trailer brakes when driving and in the parking lot, drive of the parking brake, control of the pneumatic system of trailers with a single and two-wire drive, air bleeding when towing another tractor, for inflating tires, for blowing off the tractor, etc. In particular, the K-744R tractor has a single-line trailer brake control system, as well as a manual trailer braking valve.
On tractors K-744R1, K-744R2, K-744R3, a two-wire trailer brake control system can be installed additionally (to the single-wire).
The diagram of the tractor pneumatic system is given in Appendices 1, 1A, 1B.
The electrical system is 24 V, single-wire, negative terminals are connected to the tractor ground. The sources of electricity are two storage batteries and an alternator that works in conjunction with a voltage regulator. The electrical circuits of electricity consumers are protected from short circuit̆ fuse boxes. Tractors can be connected to a 12 V power supply. The connection block is located under the cover in the lower right part of the instrument panel support next to the "12 V" sticker. The electrical equipment diagram is given in Appendix 9.
 |
|
|
Location of control levers hydraulic valve of the tractor 1 - control of the tractor's hydraulic system; 2, 3, 4, 5 - control of external hydraulic lines |
The location on the tractor of the outlets for connection of external hydraulic lines 2, 3, 4, 5 - pins for connection to external hydraulic lines from the handles of the same name 2, 3, 4, 5 |
The tractor is equipped with a separate-aggregate hydraulic system and a three-point hitch, which serves to ensure the connection of mounted and semi-mounted agricultural machines and implements to the tractor, adjust them in the working position and transfer them to the transport position. On tractors, a 4 or 5-section hydraulic valve with remote cable control is installed in the hydraulic system of the working equipment, four sections of them (levers 2, 3, 4, 5) are designed for connection to external hydraulic lines.
The spool of the section with the regulator does not have an automatic return to neutral.
To reduce losses in the hydraulic system and eliminate its overheating when working with seeders equipped with a fan drive hydraulic motor, the tractor spare parts have a kit to provide a "free" (bypassing the hydraulic valve) drain into the hydraulic tank and a hydraulic motor drain kit.
The free drain kit consists of a 2SN 20 DKOL 90 / DKOL / 3200 hose, an adapter 14 / 8-290 / L18-22VDM (M30x2-M26x1.5), a breakaway coupling CPV082 / 2615F, a CNV082 / 2615M valve and two clamps 30-20- M8.
Install the free drain kit as follows:
- dismantle the plug from the fitting of the hydraulic tank filter cover (right in the direction of the tractor);
- install hose 2SN 20 DKOL 90 / DKOL / 3200, fitting with fittings 90 °, connect to the fitting of the hydraulic tank filter cover;
- fix the sleeve on the "A" and "B" links of the fuel tank using clamps 30-20M8, fasten the clamps to the links with standard bolts. At the same time, in the section "B" of the sleeve, provide a "slack" (about 1000 ... 1200 mm from the fitting of the hydraulic tank cover to the link "A") to prevent damage to the sleeve when folding the tractor around the vertical hinge;
- the fitting "G" of the hose through the adapter 14 / 8-290 / L18-22VDM (M30x2-M26x1.5) connect with the breakaway coupling CPV082 / 2615F;
- Connect the CNV082 / 2615M valve to the hydraulic fluid return line from the hydraulic motor.
The drainage kit consists of a pipe 744R2-4600010; clamping bolt 700.11.00.039, two copper gaskets 12M1, 2SN 10 DKOL / DKOL hoses, L = 3700, adapter 15-290 / L1812 and CPV082 / 2615F coupling.
Install the drainage kit as follows:
- dismantle the M12 plug on the hydraulic tank wall from the cab side;
- install pipe 744P2-4600010 with bolt 700.11.00 and gaskets 12M1 on the tank lug;
- connect the 2SN10 DKOL / DKOL sleeve, L = 3700 to the pipe and lay it along the route, securing it to the sleeves with plastic clamps;
- connect the adapter and coupling to the free end of the sleeve. Connect the valve of the drainage route (leaks from the hydraulic motor housing) of the agricultural implement to the coupling.
ATTENTION!
Only the drain line of the hydraulic motor (if any) should be connected to this route. Do not connect drain lines to it.
Installation of free drainage and drainage routes
A flow regulator is installed in one of the hydraulic distributor sections (the section handle is farthest from the operator).
The adjusting screw of the regulator is located in the upper part of the section, in front (in the direction of the tractor) from the spool (see the figure below).
The position of the adjusting screw "turned out all the way" corresponds to the maximum value of the oil flow through the section to the rightmost (in the direction of the tractor) pair of quick-connect couplings for external hydraulic lines, the position "turned all the way" corresponds to the "zero" flow rate.
To avoid overheating of the hydraulic system, use the flow regulator only when the tractor is equipped with a variable-flow pump. When completing the system with an unregulated pump, the screw must be turned out all the way.
Hydraulic distributor (top view)
To connect the corresponding hydraulic lines of the hydraulic system of an agricultural machine or an implement aggregated to the tractor to the remote hydraulic lines of the tractor, to prevent oil leakage from the hydraulic hoses high pressure in case of their disconnection or emergency rupture, three pairs of quick-connect breaking devices are intended (Fig. 25).
To reduce the peak loads arising when switching the hydraulic valve spools of the working equipment in the tractor hydraulic system (in the "pump - hydraulic distributor" line), a hydraulic accumulator and a safety valve are installed (Appendices 2 and 2A).
The accumulator is a sealed container under high pressure.
ATTENTION! The accumulator cannot be serviced, disassembled or repaired. Do not perform welding, soldering or mechanical work on the battery case.
Welding or brazing can cause an explosion!
Mechanical stress on the body can damage it and cause the accumulator to malfunction. Pay special attention to the need to perform assembly and disassembly work in the hydraulic system only when there is no pressure in it.
For outdoor lighting and signaling, the tractor is equipped with two transport lights with high and low beam, eight working lights, four direction indicators, four side lights, "Road train sign", two side repeaters of the direction indicator, two "Stop lights".
Hydrostatic steering control of the tractor, steering column adjustable in angle and height, instrument panel with automatic control over the operation of tractor systems greatly facilitate the work of the driver.
