Where and for what purposes is it best to use the DT-75 bulldozer?

The DT-75 Kazakhstan tracked agricultural tractor is the most widespread and durable equipment since the times of the USSR. It began to be produced in the 60s. The prototype of the equipment was produced in Volgograd (at VTZ). It was a legendary tractor, without which not a single Soviet film about raising virgin soil was made. For the needs of agriculture in Kazakhstan, high-quality equipment was needed. For this purpose, they built the Pavlodar Tractor Plant named after. Lenin, where they began to produce the famous tractor DT-75M Kazakhstan. The first unit rolled off the assembly line of the tractor plant in 1968 - it was the famous DT-75 Kazakhstanets.

Application area

Years of operation of the equipment have necessitated its multiple modernizations, which have improved the work comfort of the bulldozer operator and significantly increased the productivity of the equipment in a wide segment of use:

• the machine develops soil and digs holes at construction sites;
• performs manipulations for irrigation and drainage purposes;
• uproots stumps;
• clears cities and highways of snow and dirt;
• works on swampy soil and off-road conditions;
• moves large volumes of bulk materials;
• Performs loading and unloading operations.

The purpose of this bulldozer model, according to reviews from its owners, is quite broad. The equipment is used on agricultural land and numerous construction sites. If you attach special attachments, the equipment works successfully when removing snow. Many specialized companies want to buy a unit for soil leveling and performing loading and unloading processes during construction activities.

The use of a variety of attachments makes it possible to use the mechanism in an expanded list of industries. Numerous components are mounted on a powerful welded frame, which is a pair of longitudinal spars. They have a rectangular cross-section, and along their length the connections are made with reliable transverse connections. Such a basis guarantees the quality of plowing, snow retention actions, and soil leveling work.

Technical specifications

Indicators	Meaning
Dimensions	4.4*1.85–2.24*2.71 m
Allowable ground clearance	32–38 cm
Weight	7.4 t
Diesel tank volume	360 l
Movement principle	crawler
Number of gears	10 front, 5 rear
Motor power	95 l. With.
Number of cylinders	4
Travel speed	12 km/h
Diesel fuel consumption	15 liters per hour of operation

Cabin

Manufacturers have taken care to implement reliable sound insulation of the driver’s room. They generally succeeded in achieving this, since all cabin connections are as tight as possible. Because of this, the space inside is provided with a comfortable temperature under different weather conditions. An additional option is to equip the workplace with air conditioning and heating systems.

Electrical diagram of the DT-75 tractor

The steering mechanisms and the location of control devices are convenient and meet ergonomic requirements. It is also convenient that there are no auxiliary devices in the cabin that could interfere with the simple operation of the machine. The direction indicators on the main instrument panel have been removed. Another feature is the absence of mirrors, which impairs inspection of the area behind the unit. The driver has to rely only on himself when working.

Engine

The machine is equipped with a four-stroke hydraulic cylinder diesel engine with a rated power of 95 hp. This power unit is produced by a Finnish company. Its special feature is the presence of a pre-heater, which makes starting the engine much easier even in severe frosts.

The multi-stage gearbox allows you to engage 10 forward speeds and 5 in reverse. Thanks to this potential, the DT-75 is convenient to operate under various extreme conditions. The transmission, operating simultaneously with the diesel engine, minimizes diesel fuel consumption. An hour of idle operation requires only 15 liters of diesel fuel. The speed of the crawler bulldozer of this model is 12 km/h.

Transmission

This unit is made in the form of a multi-stage gearbox, providing smooth gear shifting.

Thanks to this, a high-quality transmission can significantly reduce the total amount of diesel fuel consumed.

Attachments

Attachments are mounted, guided by the specific requirements for the actions performed. Various manufacturers of these devices offer a wide range of them. Some are convenient for agricultural activities, others are designed for clearing snow from the area.

They produce modifications of the machine with a rotary or stationary blade. Its rated width is 2.5 m. The height of this device is 0.8 m. More often, a blade is attached to clear the road surface with its help.

Transporting the unit

The design features of the tractor greatly facilitate its transportation when using a train platform.

Although, given that not every object has a railway line, manufacturers made sure that there was an alternative way to deliver special equipment. The bulldozer can easily be loaded onto a vehicle for transportation. To do this, you only need a trailer with a low frame.

Tractor weight and dimensions

Let's consider how much the unit weighs. Weight depends on the model and modifications made. The DT-75 is the lightest - its weight varies from 5900 to 6050 kg. The weight of the DT-75M tractor is 6550 kg, other models - up to 7200 kg. 6.5 - 7.2 tons - weight with a shovel, the weight of the blade itself is no more than 1050 kg. The old-style DT-75 has the smallest weight of all modifications - 5.9 tons. The DT-75ML model is equipped with a large cabin; the weight of such a tractor depends on the installed engine - the more powerful the power unit, the heavier the tractor. The minimum weight of 75-ML is 6 tons.

Tractor parameters:

• track - 1.33 m;
• longitudinal base - 1.62 m;
• ground clearance - 37.6 cm;
• total length of the tractor - 3.48 m;
• width - 1.48 m;
• height - 2.65 m;
• caterpillar width - 39 cm;
• ground pressure - 0.051 mPa.

DT-75 has gained great popularity in our country and abroad due to its simplicity and cost-effectiveness of operational properties.

Basic Operation

If desired, the DT-75 driver is able to calculate the working cycle period, which consists of performing the following actions:

1. A working stroke in which the soil is deepened and dug (the collected soil is collected and then moved).
2. Stopping movement at the moment of switching gears.
3. Idling time to return the unit to the starting point.
4. The stop required to switch to the working stroke.

First cut and then separated soil accumulates in front of the knife, filling the dump to the top. Then the dump mechanism is raised to the edge of the earth's surface, its contents are moved to the required location. If it is necessary to level the removed soil along a plane, then the blade is evenly raised when moving the machine. Excellent maneuverability allows the driver to start each cycle in a different place.

Exploitation

4 configurations of this model of earthmoving machine were produced:

• C1 - remote cylinders, rear linkage and hydraulic units were present;
• C2 - added distributor and hydraulic tank;
• C3 - no additional equipment;
• C4 - similar to C1, but there is no remote cylinder.

In order to move special equipment to the work site by road transport, it is advisable to know in advance exactly how much weight of the bulldozer along with attachments will be transported. Although the option of moving by railway platforms was previously common, the use of automobile technology turned out to be much more economical.

Here you can download free operating instructions for the DT-75 tractor.

Fuel consumption

The certified consumption of diesel fuel per hour of intensive work is 15 liters, if a 95 liter motor is mounted on the unit. With.

With a different tractor configuration, this figure can increase significantly. Diesel fuel is filled into a tank increased to 380 liters.

Exploitation

The timber at the felling site has been cut down and needs to be transported to a storage site.

The technological cycle of operation of a skidder at a cutting site includes:

• empty movement;
• Loading point selection maneuvers;
• loading work or forming a bundle from trunks;
• movement under load;
• unloading work.

Basically, sawn timber is moved in a semi-submerged position: one end of the bundle of timber is loaded onto a tractor, the other is dragged. The machine lifts a stack of timber with a volume of 5 m3.

In addition to loading and transportation, without manual labor, the skidder works with the forest:

• leveling the stacks along the butts or tops;
• moving trunks to remove branches and twigs using mechanisms;
• sorting for transportation.

TDT-75 can be equipped with a dump device for cleaning the cutting area from the remains of felling and dead wood. Installing a hydraulic manipulator allows you to use a grab, cargo hooks, and grippers.

All work is visually controlled by the operator from a glass cabin located high in the front part of the platform.

The machine performs its functions at temperature parameters from -40° to +40° C.

Advantages

The advantage of this particular unit was its increased maneuverability, ensured by the expanded performance of the track surface. In different versions, they had a width of 390–470 mm with a ground clearance of 326–380 mm. These indicators allow the tractor to work successfully on the most difficult soils without loss of quality of operation and productivity.

Dimensions of bulldozer DT-75

With rated fuel consumption, the unit moves freely around the territory at a speed of 12 km/h. At the same time, the unit has other advantages:

1. Optimal dimensions.
2. Increased stability.
3. Easy replacement of components.
4. Good performance.
5. Long-term operation.
6. The presence of a pre-heater, which allows you to operate successfully and productively at low temperatures.
7. Harmonious technical parameters.

To be convinced of the advantages of using this bulldozer, it is not at all necessary to visit construction sites; it is enough to read user reviews about the unit to understand how profitable the purchase of this model of special equipment will be.

Pipelayer TB-2

The TB-2 pipe layer, created on the basis of the DT-75, is designed for lifting and transporting pipelines with a diameter of up to 350 mm and backfilling trenches. In fact, this is a universal road machine: it is used not only by oil and gas builders, but also when laying heating networks, gas and water pipelines, sewerage, power lines and communications. The lifting capacity of the TB-2 at the minimum boom radius is 4 tons, the maximum lifting height of pipes is 3.5 m, the maximum depth for laying is 2 m.

Additional attachments can be mounted at the rear, and a blade can be mounted at the front to use the TB-2 as a bulldozer. In addition, the pipe layer can be combined with a winch, bar digging equipment, a welding or drainage installation UV-1 or UV-4 (UOV-4) and then used for excavation, welding work, water pipeline repair, pumping groundwater, melt and rainwater from pits , trenches, wells.

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Device

Initially, the plant produced bulldozers, which were equipped with a four-stroke SMD-14 engine. It had a liquid cooling system, ran on diesel fuel and had an output of 75 liters. With. power. The DT-75B modification for work in marshy areas has improved support values ​​due to the expansion of the track surface. It was equipped with an SMD-14NG diesel engine, whose power rating was slightly increased - 80 hp. With.

Design of the DT-75 tractor

The rear axle and gearbox of this earthmoving machine are located in a single housing. A well-thought-out transmission allows the tractor to overcome various obstacles, operating confidently under a significant slope.

The transmission clutch is constantly closed. It is dry and has 2 discs. High-quality braking at any speed is guaranteed by reliable band brakes. The first mechanisms produced by the plant were equipped with a hermetically sealed cabin from a GAZ-51 car.

The modernized machine is already equipped with a cabin, the height of which has been increased, and the control arms are bent in the direction of the tractor driver. Nowadays, the driver’s work areas are provided with good sound insulation due to enhanced tightness; to maintain a normal temperature, a heating system or air conditioning is additionally installed.

The unit is equipped with modern optics; all its instruments, together with control structures, are located according to the rules of ergonomics, which significantly increases the driver’s productivity standards. Different versions of the bulldozer have rotary or stationary blades in the form of a metal device, which in width covers the dimensions of the machine and is equipped with a curved sheet along the front.

When the moldboard hydraulic cylinder operates, due to the increased pressure of the working fluid in it, the connecting rod performs reciprocating movements, which guarantees the completion of the required manipulations.

Attachments are required for territory planning. A rotary blade is indispensable when performing snow clearing operations. Thanks to the easy rearrangement of attachments, the tractor is universal, it is convenient to operate in almost any industry.

New properties with old name

Nowadays, the DT-75D tractor, while retaining the old name, has improved characteristics. Diesel power has been increased to 100 hp. pp., fuel efficiency and load-bearing capacity have been improved, the reliability of most transmission components, chassis systems, and rear linkage has been increased, and the spring suspension with four rollers on board provides the tractor with a good smooth ride. The DT-75D tractor can be equipped with an additional creeper or reverse gearbox.

Analogs

Using the tractor of this model as a base, the plant produces its modification DT-75N. The unit is equipped with special mounted trailers. The model is used by agricultural workers as a transport mechanism.

Another analogue was the model called DT-75D. It is used to carry out high-quality harvesting of any agricultural crops, for plowing fields and sowing plants. This car has no problems with unpleasant slipping, it has ideal cross-country ability.

Although the weight of the tractor is significant and its speed is low, the model has remained a leader among similar equipment for half a century. Because of this, the company continues to modernize machines, adding new functions to them, increasing productivity.

Front-end loader

The ability to install a hydraulic lifting and tipping bucket on the DT-75 instead of bulldozer equipment led to the creation of the PFP-1.2 front-end loader. This machine loads bulk materials (sand, fertilizer, household waste, crushed stone) into the bucket from the front, and pours it back into the vehicle.

The loading capacity of the loader is 1.5 tons, the bucket capacity is 0.9 cubic meters. m. Small size and maneuverability distinguish the model favorably when working on construction sites, in ports, and on the railway. Equipped with a jaw gripper PFP-1.2 can load pipes and round timber.