What dimensions the DT 75 crawler tractor will have depends, first of all, on its modification. So, for modern models the following indicators are characteristic:

• body length - 4240 mm, in combination with rear attachments in a position ready to move - 4530 mm;
• body width - 1850 mm;
• height - 2705 mm, can vary within 30 mm in both directions.

Tractor weight indicators depend on the type of installed power unit. For models with an A-41 engine, it is 6530 kg, and for representatives equipped with diesel installation D-245.5S2 - 6000 kg. The technical characteristics of the DT 75 tractor, namely the operating weight, vary depending on the type of attachment.

Cabin

Comfortable working conditions for the driver are provided by a modern cab. In its composition, it has a heating system, which allows you to work in winter time... To damp vibrations of the engine and other construction equipment, vibration-insulating material was installed in conjunction with waterproofing.

Any weather conditions will not interfere with the observation of the working process, since the cab is equipped with a front and rear wiper, which is able to remove a thin layer of ice, as well as glass washer. The progressive tractor for summer work is equipped with air conditioning.

Design features

One of the significant design features of the DT 75 tractor of the first years of production is a diesel engine starting system. The performance of the unit does not allow starting the motor using an electric drive. Therefore, an additional gas engine, which is already powered by an electric starter.

Another feature of the models can be called a pre-start diesel fuel heater, which turns on to work at an ambient temperature of less than -5 degrees Celsius. If a particularly low operating power is required, the DT 75 agricultural tractor can be equipped with a creeper.

Scope of application

The scope of the tractor is quite extensive. It has proven itself well on the construction site, especially during the creation of large excavations for massive objects. They can move soil masses by dragging by installing a straight blade. For loading land into dump trucks, spherical blades are installed on the model.

Often a heavy vehicle is used as a tractor for transporting particularly massive objects. In this case, it is equipped with a pendulum or rigid tow hitch... But DT 75 is not for nothing nicknamed as an agricultural tractor. Among the attachments, there are elements for working in the field - seeders, potato diggers, plows, baking powder, harrows.

The cost

The cost of crawler tractors varies significantly depending on the region. At the moment, the market for bulldozer equipment is most represented by used models. Their price starts to rise from 250 thousand rubles and depends on the state, technical equipment and year of manufacture.

For factory models of modern production years (2016), the cost begins to grow from 1.7 million rubles. But the most promising is the DT 75 tractor, modified in 2009. Its price corresponds to the power and reliability, will satisfy any customer relying on durable equipment.

Would you like to see with your own eyes a long-lived tracked tractor? You don't need to visit museums or watch old films for this.

Go to the yard of the MTS, or drive through the fields during the harvest. You will surely meet the DT-75 tractor.

The successful technical solutions used in the design still make the car in demand in agriculture and other industries.

Technical characteristics of the first model DT-75

In 1963, the DT-75 tracked tractor developed by VgTZ specialists was put into production. Subsequently, the model was repeatedly modernized.

The changes made by the designers did not affect the structure of the DT-75 bulldozer, specifications which initially looked like this:

• SMD-14 engine. Diesel power unit had four cylinders, a water cooling system, with a working volume of 6.33 liters, developed a power of 75 liters. from. and consumed 195 grams of diesel fuel per horsepower per hour. Role starting device performed gasoline engine PD-10M-2. In this version, the mass of the DT-75 engine was 675 kg.
• The clutch is double-disc, dry, with coil springs and a mechanical control drive.
• The gearbox is seven-speed, four-way, seven forward gears and one reverse. To improve the traction characteristics of the DT-75 tractor, the gearbox was equipped with a torque amplifier (UKM), which, if necessary, can be disconnected from the cab. This made it possible to accelerate to 10.85 km / h when moving forward, and up to 4.41 km / h when moving back.
• Rear axle combined with a checkpoint, final (side) gears in one molded case, divided by partitions into compartments, and braking system tape type. To access these units for repairs, it is necessary to remove the covers located on the top of the housing. At the rear of the transmission, a power take-off shaft is mounted, which ensures the operation of the attachment.
• Suspension - elastic, balanced type. Track rollers - four on each side - are mounted in pairs on balancing carriages (carriages) with cylindrical spring springs. The design, despite its simplicity, provided a smooth suspension operation. Thanks to this, the DT-75 tractor is more comfortable than its competitors.
• DT-75 tracks consist of cast tracks of complex shape hingedly connected to each other. The design of the tracks provides the machine's passability on soils with the required resource. The track width is 390 mm as standard.
• The fuel tank was originally installed on the rear wall of the cab. The volume of the fuel tank is 245 liters.
• Hydraulic drive. Used when working with attachments, it consisted of assemblies: a gear pump, a distributor, a hydraulic cylinder and an oil tank of the hydraulic system with a capacity of 11 liters. The hydraulic system was controlled from the cab.

Dimensions of the DT-75 tractor:

• Length (without blade) - 4530 mm.
• Width (along the outer edge of the tracks) - 1760 mm.
• Height (on the roof of the cab) - 2306 mm.
• Track (along the track axis) - 1330 mm.
• Base (distance between axes) - 1612 mm.
• Ground clearance - 326 mm.
• Structural weight - 5750 kg.
• Specific ground pressure is 0.44 kilograms per square centimeter.

From the characteristics of the DT-75 tractor, it can be seen that the machine is compact. In combination with maneuverability, it allowed the use of equipment in a confined space.

Important changes

The first major modernization was carried out in 1967. The DT-75M modification even received its own name - Kazakhstan.

The "Kazakhstani" differed from its predecessor in its power unit. The A-41 engine was installed on the car, the power of which was 90 liters. from. with a working volume of 7.45 liters.

Despite the increased power, specific fuel consumption decreased and amounted to 185 g / l. from. in hour. New motor weighed more - 930 kg, which means that the weight of the tractor also increased.

Now it reached 6350 kg with a ground pressure of 0.48 kg per sq. see But at the same time, the production of a modification with the SMD-14 engine continued.

The reason is the low cost of such machines. An increase in the traction characteristics of the DT-75 made it possible to expand the list of equipment: plows, plows, harrows, cultivators, seeders, sprayers, irrigation equipment - this is not a complete list of devices ..

Taking care of comfort and performance

In 1972, the car received a modified design with a comfortable, sprung cab. This improved the working conditions of the operator, but did not allow the placement of a significant fuel tank in the same place.

The developers have moved to the left side, moving the cab to the right of the vehicle axis. Thanks to this decision, the DT-75K tractor acquired a peculiar appearance and received the popular nickname "Postman". The tank hanging on the left looked like a bag of letters slung over his shoulder. But there were other differences:

• To simplify maintenance in the suspension design, changes were made to the external balancers located on the right side.
• To facilitate starting in the cold, the proposed additional equipment preheater PZHB-200.
• Rear lifting mechanism received a limiting rotation of the levers upward and a modified fastening of the ends of the front struts to the frame.
• A support device controlled from the driver's seat protected the DT-75K tractor from overturning when working on steep slopes.

In 1975, the design was revised again, retaining the layout with a side fuel tank. The upgraded SMG-14 engine has become more powerful - 80 hp. from. - and more economical - 185 g / l. from. h.

Such a power unit was marked SMG-14NG. The changes made increased the weight of the car to 6440 kg, and the ground pressure to 0.049 MPa.

Additional indexes have been removed from the name. The model was renamed DT-75 again. The "Kazakhstani" is not forgotten either.

The production of equipment with the A-41 engine continued in a new design. The DT-75M tractor has received improvements that are typical for other machines lineup.

There was an extreme version, equipped with a V-shaped six-cylinder unit SMD-66. Engine power was 170 hp. from.

It was assumed that such a technique would be used for tilling operations at higher speeds.

Having a thrust-to-weight ratio, you don't have to think about how much to drive the attachments. But the limited strength of the chassis and linkage assemblies did not allow this idea to be realized.

Chassis could not cope with the increased loads, and the DT-75S tractor was produced in a small series.

Life goes on

Today VgTZ produces the legendary car. Behind the redesigned design with a sloping bonnet and a cabin of increased comfort, there are units familiar to machine operators.

For some time, the model was equipped with an engine of the Finnish company Sisu, for the operation of which it was required diesel fuel... Then they returned to the range of domestic motors.

The new DT-75 tractor is equipped with A-41, SMD-18N, RM-120 and D-245.25 engines, the power of which is within 80 - 95 hp. from.

More than 20 configuration options are offered. Some machine operators complain that the manufacturer made the mistake of making the cab too high.

If this does not matter in the field, then the technique is no longer suitable for processing orchards - the lower branches of fruit trees interfere with movement.

As popular as or has become an object of folk art. The reasons why the technique that appeared half a century ago is popular:

• A successful design that allows you to cope with tasks, with a relatively weak power-to-weight ratio.
• Ease of service. Repair of the DT-75 tractor is not a problem and is carried out in the field.
• Low cost and availability of spare parts makes the machine profitable even for small farms.

We continue our series of articles on domestic agricultural machinery. For those who are interested in the topic, stay on our website.

Here you will find out what is good, and why the mighty K-700 has not spread.

The DT-75 crawler-type tractor has been produced in various modifications since the end of 1963 and differs among its counterparts in terms of efficiency and ease of operation at a low cost.

Initially, the tractor was designed to perform various agricultural works in combination with semi-mounted, mounted and trailed mechanisms. However, high performance characteristics let him become universal unitsuccessfully used in various branches of economic activity.

DT-75 and its modifications were produced at the facilities of the Volgograd Tractor Plant (VgTZ, Russia) and Pavlodar Tractor Plant (PTZ, Kazakhstan). The first of them stopped assembly line assembly in 2009 and transferred the production of DT-75 tractors to the Volgograd Tractor Company (VTK). The second - PTZ, serially produced models DT-75M (since 1968), DT-75ML (since the mid-80s), DT-90P, DT-75T and DT-75MLK (all three - from the early 90s In 1998, the Kazakh plant filed for bankruptcy.

DT-75 device

The basic version of a tracked tractor weighing from 5.5 tons and dimensions of 4109.5 × 1740 × 2304 mm was driven by a 4-cylinder SMD-14 diesel engine (75 hp) with a service life of 3 thousand hours. Since the end of the 70s it was replaced by an improved version of the SMD-14NG (80 hp). Also, on various modifications of the tractor, the engines A-41 (90 hp, model DT-75M), SMD-18N (95 hp, DT-75N), SMD-66 (170 hp, DT -75S), A-41I (94 hp, DT-75D and DT-75T), A-41SI (94 hp, DT-75DE), Belarusian D-245 (105 hp, DT -75ML, DT-75DM and DT-75T), RM-120 and RM-80 and (100 hp and 80 hp, DT-75RM).

Photo of the tracked model of the DT-75 tractor

Running power plant carried out using starting motor.IN winter period a pre-heater is used to warm up the diesel engine.

The chassis of the DT-75 consists of a welded frame (two spars of rectangular cross-section connected by transverse circular pipes), on which all units and mechanisms are mounted, rollers with rubber tires, guide and drive wheels, 4 suspension carriages and two track chains.

The clutch is permanently closed, 2-disc. The rear axle has two single-stage planetary slewing gears, band brakes, floating type.

To increase traction, the transmission can additionally include:

• torque multiplier (UKM, planetary gearbox with friction and roller clutches; gear ratio 1,25);
• creeper (mechanical gear 4-stage reducer);
• reverse gear (single-stage mechanical; front gear ratio - 1.67; reverse gear - 1.35).

In order to expand the range on DT-75 tractors, a power take-off shaft (PTO) is used with a drive from a drive shaft of the UKM or a creeper.

Transmission - 4-way (7 forward gears and one reverse), is installed in the front compartment of the body common with the rear axle. On the front wall of the gearbox, a UKM or creeper mechanism is mounted in a separate housing.

The base model is equipped with a two-seater all-metal pressurized cab. The seat was adjusted according to the height and weight of the driver. Since 1978, the DT-75 has been supplied with a new sprung cab, which is shifted to the right from the central axis of the tractor to improve visibility.

To create comfortable working conditions, a ventilation device is used that supplies cleaned, cooled and humidified air to the cab. In the winter period, the air heater provides the optimum air temperature.

Diagram of the DT-75 tractor


1 - engine; 2 - a cabin; 3 - fuel tank; 4 - levers of the hinged device; 5 - power take-off shaft; 6 - hook-on bracket; 7 - driving wheel; 8 - central gear; 9 - caterpillar; 10 - gearbox; 11 - support wheel; 12 - clutch; 13 - guide wheel.

The tractor is equipped with a hitch, rear linkage and a separate-aggregate hydraulic system. DT-75 can be aggregated with almost any agricultural implements (mounted plows and harrows, potato diggers, seeders), including semi-mounted side ones (concrete pavers, loaders). And also with bulldozer, drilling and road construction equipment.

Specifications

Technical characteristics of the main modifications of the DT-75 tractor:

* - depending on the configuration.

Modifications

DT-75M model. Produced since 1967 at VgTZ and since 1968 at PTZ. It differed from the base model:

• using the A-41 engine (90 hp);
• a taller cab shifted to the right;
• fuel tank of increased capacity (315 l), located on the left side of the cab.

Photo of the DT-75M tractor


DT-75B model. Swamp modification, designed for agricultural work in peat extraction and drained bogs. Produced in series since 1968 at VgTZ. The main differences are:

• sMD-14NG engine (80 hp; 1800 rpm);
• a cabin similar to the DT-75M;
• spars on a welded frame are connected by elongated beams, as a result of which the width of the tractor has increased to 2240 mm, and the track - to 1570 mm;
• the width of the tracks was increased to 670 mm, which made it possible to achieve a specific pressure on the ground of 0.24 kgf / cm2 with the idler wheels lowered (longitudinal base - 2365 mm) or 0.33 kgf / cm2 with the idler wheels raised (longitudinal base - 1612 mm);
• added front and rear sump to protect engine and transmission;
• instead of UKM, a 4-stage speed reducer is used.

Model DT-75K is designed for agricultural work on mountain slopes with a steepness of no more than 20 ° at an altitude of up to 2000 m above sea level. Producer - VgTZ (since 1972). This modification was equipped with an SMD-14NG engine and had the following features:

• welded frame and tracks are identical to the DT-75B model;
• to prevent overturning on slopes, a supporting safety device was used;
• the cockpit had a visual roll indicator and was equipped with two seats located one opposite the other;
• the reverse gear in combination with the front and rear linkage mechanisms made it possible to work in a shuttle way.

The next modification, the DT-75N, was produced with an upgraded SMD-18N engine. The specified unit was completed with a turbocharger and adjustment fuel pump, thanks to which the power of the power plant was 95 hp. (1800 rpm).

The tractor was produced only at VgTZ and was aggregated with the same attachments as the DT-75M.

Photo of the DT-75N tractor

DT-75S model. Designed for agricultural, loading and earthmoving road works... Key Features:

• V-shaped six-cylinder diesel engine SMD-66 (170 hp, 1900 rpm) with gas turbine supercharging;
• 2-speed PTO;
• a torque converter providing automatic control of the tractor speed depending on the resistance value;
• the fuel tank (360 l) and the hydraulic oil tank are installed on the left side of the cab.

The DT-75D model with the A-41 or D-440-22 engines boasts improved fuel efficiency, increased reliability of the transmission, chassis and rear linkage. Traction qualities of the tractor are increased by installing a reverse gear or creeper. For aggregation, the DT-75D uses: a hydraulic control and drive system, a towing device, a rear hitch, a power take-off shaft and removable front ballast weights.

The DT-75ML model has been produced since 1986 only at PTZ. Main differences: changed facing engine compartment, increased cab (height - 2923 mm) and the number of control devices.

Photo of the DT-75ML tractor

Since 1991, PTZ has manufactured wheel modifications of the tractor - DT-75MLK, DT-75KP, DT-75DK and DT-75KPM. Wheeled versions were produced in small series and were used in light reclamation, road, construction and agricultural works.

Of the less common, we will indicate the DT-75V models (SMD-14NG engine), DT-75RM (RM-80 or RM-120 engines), DT-75DM (D-245.25 engine.) And DT-75MV (A-41 engine), produced only at VgTZ.
The DT-75 was further developed in a new VTK product under the trade name "AGROMASH 90TG" with the A-41SI-02 engine (94 hp, 1750 rpm), which has been produced since 2009.

The new tracked tractor has a new design and, like its predecessor, is distinguished by enviable versatility. It can carry out the entire range of agricultural operations, as well as road excavation, land reclamation, construction and loading operations.

The DT 75 tractor belongs to the 3rd traction class. It was designed for use in rural areas.

Over time, the DT-75 tracked tractor was modernized in accordance with new technologies, and began to be used for construction, industrial and land reclamation purposes.

The production of this series of tracked tractors began in 1969. To date, more than 3 million copies of DT 75 different models have been produced.

In this indicator, the DT 75 is the record holder, it is the most mass-produced tractor, which is constantly in demand on the market.

DT 75 is a basic model, on its basis a line of other tractors was developed, capable of working with a wide range of attachments and trailers for agricultural, construction and earthmoving directions.

The most popular among them: DT-75N, DT-75K, DT-75M, DT-75D and DT-75RM.

Specifications

Their technical characteristics are shown in the table:

Design features

A distinctive feature of the DT-75 tracked tractors are large dimensions of 4530 × 1850 × 2650 mm and a weight of about 6.5 tons. Together with the track drive, this makes it easy to use the machine as a bulldozer, even on the most viscous soil.

On base model tractor postman installed four-cylinder diesel engine SMD-14 water-cooled.

The motor power is 80 horse power, average consumption diesel engine - 250 g. per hp / h.

The tank is designed for 315 liters, this allows you to work autonomously on the machine for a long period of time.

The owners say that the advantages of these engines are reliability, economy, simplicity of design and maintainability. Parts for this motor can be found in most automotive markets.

The tractor is equipped with an 8-level gearbox, which allows you to choose the optimal speed for a specific type of work.

Due to this, the maximum smoothness and uniformity of the DT-75 is achieved.

Traction-coupling performance of the tractor is significantly increased with the help of a double-disc clutch, which is constantly engaged, and a torque amplifier that increases traction characteristics by about 20-30%.

Wherein, main gear, gearbox and turning clutches are located in one unit. Additional equipment with creepers is possible.

On the forums there are reviews from the owners about the successful use of the DT-75M tracked tractor on tires.

The modification consists in the installation of bridges and semi-axles from the 130th ZIL.

At the same time, there is a significant saving in fuel and lubricants, as well as an extension of the engine's service life. It becomes possible to carry out the transportation of goods on general roads.

The DT-75 tractor cab is completely sealed and allows 2 people to be accommodated in it at once. It has increased heat and sound insulation.

The technical characteristics of the cab fully comply with the current standards.

The seat height can be adjusted to suit the height of each operator. The ventilation system has filters for cleaning and heating the incoming air stream.

The owner of the DT 75K tractor is provided with a 360 ° view.

All control levers are located in the cab, which allows you to adjust the travel of the machine directly during operation.

The popularity of the tractor is achieved thanks to a wide range of different attachments that can be used in conjunction with the hydraulic system. It is controlled directly from the cab of the DT-75 tractor through a hydraulic valve.

Functionality

This machine is mainly intended for use in difficult conditionswhere a conventional tractor is unable to carry out work.

In the construction industry, this machine can be used as a swamp bulldozer in site preparation for further construction and trenching.

Thanks to the wide and tall blade-shovel, you can work a large area of \u200b\u200bland in one go.

Engine power 80 hp enough for working in high humidity and swampy areas.

The shovel blade is also used to remove snow from road surfaces in winter.

Snowplow SSHR - based on the DT-75 tractor

In rural areas, the DT-75M tractor is mainly used for plowing. This model manifests itself in the best way when working with heavy virgin lands with a large amount of stones and hard rocks, since the caterpillar module, together with the large mass, allows even a five-contour plow to be used for plowing.

DT-75 is successfully used as an excavator. He is able to deepen reservoirs or pull out the foundation. The highest lifting capacity of the bucket can reach half a ton, while the unloading of soil can take place directly into the trailer of the truck for further transportation from the work site.

The Dt-75 tractor is often used as a skidder, because, thanks to the tracks and the large mass, it easily moves over the forest cover, and the hydraulic system allows you to operate the skidding hitch without problems.

The TDT-75 tractor was specially developed for these purposes. It has wider tracks.

TDT-75 is able to transport fallen trees over long distances thanks to a special mount behind the cab.

Price

At the moment, the price for a new DT-75 tracked tractor depends on the configuration and ranges from 21 to 24 thousand dollars.

At the same time, foreign analogues will cost many times more.

Many farmers do not have such money, and they are more interested in what is the cost of a used model.

On the market you can find copies worth from 3 to 4.5 thousand dollars, depending on the condition and mileage.

Features of operation

Service

To increase the service life of the tractor, it should be run-in so that all the parts rub in, it takes 8 hours.

Do not overload the engine during this time. At the end of this procedure, you must change the engine oil.

If the tractor is put into storage, then the following steps should be performed: clean the unit, put it in a dry place, drain the oil and gasoline (they will still get moisture and become unusable during this time), disconnect the spark plug wires (so as not to oxidize) and lubricate the transmission.

Planned technical inspection includes periodic oil changes. Before draining the engine oil, it is necessary to warm up the engine so that it becomes thinner and easier to exit the system.

Then the pallet is placed under the crankcase and the mining is drained. Be careful not to get hot oil on your skin.

While it is draining, you can clean the centrifugal oil cleaners and filters. After that, fresh engine oil M-10G2k or M-10dm is poured into the DT-75K tractor.

It is also necessary to monitor the oil pressure in the hydraulic system. If it does not exceed 1 kgf / cm3, then it is necessary to top up lubricant or clean the filters, if the pressure is over 2.5 kgf / cm2, then the oil is drained and the filters are washed.

The operating instructions contain detailed description with a photo of various maintenance work.

Major faults and repairs

Every owner of DT-75M tracked tractors should know how to repair the main malfunctions of these machines.

The most vulnerable point of the DT-75 tractor are the caterpillars. And many owners have experienced tearing or tearing.

Video review of work

This is how plowing with the DT-75 tractor takes place:

The high cross-country ability of the DT-75K tractor with a mass of 6.5 tons in marshland conditions is demonstrated in the video review:

Technical characteristics of the DT-75N tractor