Tractor DT-75. Overview of the lineup, device, reviews

Tractor DT-75

Let's start the review of the DT-75 caterpillar tractor with information about its manufacturer. It was the Volgograd Tractor Plant, which in 1963 launched mass production of DT-75 general-purpose caterpillar tractors. This is the most popular tractor in the USSR, which has gained immense popularity due to its excellent traction and performance characteristics. A distinctive feature of this tractor is ease of operation, the possibility of repair work, the availability of spare parts and components and an affordable price. A little later, since 1968, serial production of the modernized DT-75M caterpillar tractors was launched at the Pavlodar Tractor Plant in Kazakhstan.

Tractor DT-75

This heavy agricultural machinery has proved its versatility over the entire period of its existence, performing various road, agricultural and construction work with various equipment.

Model range overview

Technology does not stand still, so the modernization also affected this general-purpose equipment. Manufacturers have released the following improved modifications of the DT-75 tractor:

• DT-75N
• DT-75B
• DT-75M
• DT-75K
• DT-75S
• DT-75D
• DT-75T
• DT-75DE
• DT-75RM
• DT-75ML
• DT-75DM
• TDT-75
• BT-90
• Agromash-90TG

Let us consider in more detail the most popular modifications of the Soviet caterpillar tractor. We offer to compare the technical data of these models.

DT-75B

The photo shows the DT-75B, which received the name "swamp". This swamp tractor is equipped with a SMD-14NG diesel engine.

Tractor DT-75B

The productive capacity is 80 liters. with. Design features of the model:

• the caterpillar is expanded;
• there is protection of the power plant;
• protective transmission tray.

The purpose of the model is to work in wetlands, on peat bogs, in conditions of high humidity and with viscous soil.

Features

DT-75K

These tractors are often used in the mining industry, as they are equipped with a special system that prevents the tractor from tipping over, even when working on slopes with a slope of 20 degrees.

Tractor DT-75K

The built-in roll indicator accurately determined and showed the driver the position of the car in space. A diesel engine SMD-14MG is installed on the tractor machine. A feature of the cabin are its seats, located one opposite the other.

Features

DT-75S

This model is equipped with a heavy-duty six-cylinder turbocharged diesel engine SMD-66 with a capacity of 170 hp. with.

Tractor DT-75S

The design also contains a built-in resistance torque converter, allowing the tractor to perform heavy agricultural and road work, transforming into a bulldozer.

Features

DT-75M

The tractor received a more efficient A-41 power plant with a capacity of 90 hp. with., which required the installation of a more capacious fuel tank of 315 liters.

Tractor DT-75M

The cab was enlarged and moved to the right, and the fuel tank was installed on the left. This design is popularly called the "postman". The weight of this model is 6640-7210 kg.

Features

DT-75N

This unit was put into production in 1984. Its weight was 6330-6900kg.

Tractor DT-75N

The tractor is equipped with a four-cylinder SMD-18N engine with a capacity of 95 hp. with. Otherwise, this model is completely unified with the previous modification DT-75M.

Features

DT-75D

How much does a DT-75D tractor with an A-41I diesel engine weigh? The operating weight of the unit is 6295 kg, of which only the engine weight is 960 kg. The performance of the power plant is 94 liters. with. This is a universal modification suitable for all types of agricultural and other work.

Features

DT-75ML

The production of this model began in 1986 and the tractor was produced at the Pavlodar Tractor Plant.

Tractor DT-75ML

The cabin was again enlarged from 230,4 cm to 292,3 cm. The lining of the engine compartment was also changed. PTZ also conducted experiments on the production of wheeled tractors DT-75 ML.

Features

TDT-75

The TTD model is intended for skidding of tree trunks, their loading and unloading, as well as their dragging (partial or complete) in off-road conditions.

Tractor TDT-75

Wide tracks, powerful power plant mounted in the cab, universal chassis, metal underbody protection, 5-speed gearbox forward and reverse.

Features

Agromash-90TG

This is a modern modernization of the popular caterpillar DT-75. The cab has become more spacious, electric sensors have come to replace the levers.

Tractor Agromash-90TG

The car received a more productive power plant:

• A-41SI-02 with a capacity of 95 liters. with. from the Altai TK;
• Sisu 44-DTA, 94 HP with.;
• D-245.5S2 with a capacity of 110 liters. s from the Minsk Tractor Plant.

The fuel tank is again installed behind the cab, and hydraulic distributors are also installed here. A second door appeared, the hood is made of fiberglass. The cost of the tractor, depending on the modification, varies from 21000 to 24000 dollars.

Features

Устройство

Universal tracked vehicles DT-75 belong to the third traction class and are characterized by high design reliability. Initially, four-cylinder SMD-75 engines with a capacity of 14 liters were installed on the DT-75. with. The powerful frame structure is welded from spars (2 pcs), united by strong pipes.

The following elements were installed on this heavy-duty structure:

• suspension;
• roller mechanism;
• guide roller blocks;
• blocks of driving rollers;
• caterpillar carts.

Трансмиссия

The transmission of the tracked vehicle includes:

• Gearbox four-way, providing 7 forward speeds and reverse;
• floating brake system of tape type;
• double disc clutch.

To further increase the traction characteristics of the DT-75 tractor and the torque, the designers made the following additions:

• creeper;
• gearbox (planetary type) ;
• reverse gear.

These additions made it possible to use a tractor with caterpillars as a bulldozer with an attached blade (shovel).

The tractor is equipped with a power take-off shaft, thanks to which the machine turns into a universal device with various functional target units.

The drive for the PTO can be a planetary gearbox or a speed reducer enclosed in a single transmission housing.

Aggregation with attachments occurs due to the following systems and mechanisms:

• rear hitch;
• trailer mechanism;
• hydraulic system.

In addition, a caterpillar tractor can also be aggregated with target units of a side-mounted semi-mounted type.

Cabin

The pressurized cabin for two places is mounted on springs. The driver's seat is adjustable. Inside the cabin, ventilation and a stove are built in. The cabin of the DT-75 tractors of the second generation has been improved. Its dimensions and viewing angle have increased, a slight asymmetry has appeared, which made it possible to install a more capacious and capacious fuel tank outside near the side of the cab.

Among the people, the DT-75 tractor was called “postmen”.

The DT-75M "postman" tractor did not immediately take root, farmers had to get used to its enlarged asymmetric cab, which was not always convenient when plowing waters with tree crowns.

Scheme of the tractor DT-75

The machine is operated by lever, directly from the cab. Starting the motor from an electric starter, models designed for operation at low temperatures are additionally equipped with a manual starter.

Attachment

The presence of a PTO and a hitch provides for the possibility of connecting active attachments: milling cutters, cultivators, harrows, blades and many other units that increase the functionality of tractors. Thus, by attaching a plow, it is possible to effectively plow large land plots of varying complexity.

User's manual

To increase the motor resource of the machine, it is necessary:

• Break in the engine properly.
• Timely carry out technical inspection and subsequent maintenance of the unit.
• Examine the possible causes of malfunctions, described in detail in the instructions.
• Conservation.

First run, run-in

This procedure lasts 8-10 hours. The engine warms up and runs without load for the first few hours. All systems, transmissions, etc. are checked. Gradually, the loads increase and are brought to ¾ of the power of the power plant. At the end of the run-in, the oil must be changed.

Maintenance

The instructions contain a table for a scheduled inspection of a caterpillar tractor (according to the hours worked), which includes an oil change. This procedure begins with warming up the engine. The oil heats up slightly and circulates through the system more easily. When the oil is drained, you need to drain and work out. Then the filters and centrifugal cleaner are cleaned.

The following brands of motor oils are used for DT-75 tractors:

• M-10DM;
• M-10G2k.

Checking the hydraulic system requires checking the oil pressure. Pressure less than 1 kgf/cm3 requires cleaning the filters and adding oil. If it has risen to the mark of 2,5 kgf / cm2 or more, it is necessary to wash the filters with the obligatory draining of the oil.

The hydraulic oils of the following grades are used for the hydraulic system:

• 15W-40;
• TAP-15v.

Basic malfunctions and ways to eliminate them

Knowing the causes of malfunctions and how to eliminate them, the operator of the DT-75 caterpillar tractor can independently repair his unit.

Motor does not start:

• fuel is missing or does not match the quality;
• compression in the cylinder caused by wear of the compression rings;
• the oil has run out or is of poor quality;
• HPFP requires cleaning;
• filters are clogged.

The hydraulic system does not work:

• lack of oil in the hydraulic system;
• the hydraulic pump is turned off;
• the safety valve is clogged.

The brake system does not work:

• brake pad wear;
• brake disc wear;
• bearing or gear adjustment required.

Video review

Overview of the launch of the tractor DT-75

Overview of snow removal tractor Agromash-90TG

Overview of plowing with a five-furrow plow tractor DT-75

Owner feedback

Alexander, 48 years:

"Hello. I have been in the DT-10 for the 75th year with the SMD-14 engine, there is a creeper, reverse. I use it both as a bulldozer and in the field - arable work, mowing, clearing snow marks, etc. A very successful model, it rarely breaks down, there are always spare parts, it can always be repaired. ”

Alexey, 39 years:

“I am engaged in logging, I have to drive back and forth every day on the impassability, in the swamp. TDT-75 is the best way to cope with the tasks. The cross-country ability is excellent, although when the caterpillar flew off it was hard, it was not without help. ”

Dmitry, 54 years old:

“I work for a construction company. I do bulldozer work, dig trenches - I put target equipment on the DT-75 and go ahead. The cross-country ability is excellent, the controls are simple, the equipment can be repaired.”