Review of the Belarus MTZ-892 tractor. Description, technical specifications and user reviews

The Belarus MTZ-892 tractor belongs to the 80 series and differs from the base model 82.1 in a number of useful improvements. The 1.4 tk universal row-crop tractor is successfully used for agricultural work such as soil cultivation, sowing crops, and harvesting. With mounted implements, Belarus-892 works effectively in the construction industry, public utilities, forestry, industrial enterprises, and transport.

Belarus MTZ-892

Economical operation, unpretentiousness, high productivity and good quality design - for these characteristics, the MTZ tractor received the status of a reliable assistant.

Place of “MTZ-892.2” in the plant’s model range; scope of application

The 892nd model of Belarus was created on the basis of MTZ-82.1. It differs from its predecessor in a more revving engine equipped with a turbocharging system; heater and starter 24V; larger tires and synchronized transmission. And “MTZ-892.2” is a modification of “Belarus MTZ-892”.

It differs from the base model in that the 90-horsepower MMZ “D-245.5” diesel engine installed on the tractor has been upgraded to the European environmental standard “Stage I”. For the rest, the MTZ-892.2 tractor performs the entire range of work of its base MTZ-892 tractor.

Thanks to a wide range of accessories and components for additional equipment, this tractor is truly capable of being useful for solving a wide variety of tasks. First of all, in crop production of small and medium-sized peasant farms. And also in forestry and municipal farms; partly in industry and construction. From the technical and technological sides, this model is the epitome of a combination of truly modern technologies for the production of agricultural machinery.

MTZ 892 – model characteristics

The main strength of this tractor can be considered its good technical characteristics. They are the ones who help “Belorus” cope with its tasks with ease. The most important element in any car has been and will be the engine. Therefore, the review should start with it. MTZ 892 is equipped with a motor of its own production. Its name is MMZ-245.5. The diesel power unit has four cylinders. The total volume of the combustion chamber is four hundred seventy-five cubic centimeters.

The maximum power that the engine can develop does not exceed eighty horsepower. Don't forget about the carrying capacity. This tractor is capable of carrying a load weighing no more than one and a half tons.

Technical characteristics of the Belarus MTZ-892.2 tractor

Overall dimensions and weight parameters

• Length – 4.13 m x Width – 1.97 m x Height – 2.85 m;
• Wheelbase – 2.45 m.
• Front wheel track – 1.42 m – 1.97 m.
• Rear wheel track – 1.5 – 2.1 m.
• The smallest turning radius is 4.5 m.
• Ground clearance – 465 mm under the rear axle; 645 under the front axle.
• The agrotechnical clearance of the tractor under the sleeves of the front and rear axle shafts is at least 510 mm.
• Front wheel tire sizes: 360/70R24; rear - 18.4R34.
• Specific ground pressure – 140 kPa.
• The depth of the ford is 85 cm.
• The weight of the tractor when shipped from the factory is 4.1 tons.
• Operating weight – 4.25 tons.
• The maximum permissible weight (total) is 7 tons.

Tractor engine "Belarus MTZ-892.2"

The tractor is equipped with a four-cylinder, four-stroke turbocharged engine “D-245.5” from the Minsk Motor Plant.

This is a motor with an in-line vertical cylinder arrangement, liquid-cooled and a combined lubrication system (some parts are lubricated by splashing, others by pressure).

The power of this turbocharged version of the D-245.5 engine is 90 horsepower, or 66 kilowatts. The engine displacement is 4.75 liters.

• Cylinder diameter – 110 mm; piston stroke – 125 mm.
• Rated rotation speed is 1800 rpm.
• Maximum torque – 396.8 N.m.
• The torque reserve factor is 15 percent.
• Specific fuel consumption at operating power is 226 g/kWh.
• The volume of the tractor’s fuel tank is 130 liters (the tank, by the way, on the MTZ-892.2 is plastic).

The engine is started using a starting system, which includes a 24V starter and a torch-type electric heater driven by a 700 W generator.

Transmission; steering and braking control; bridges "MTZ-892.2"

The tractor's manual transmission has 18 forward "speeds" and 4 rear. It comes in the following options: with a mechanical reduction gearbox; with step-down synchronized; or with a mechanical accelerator. The driving speed is: forward – from 2.26 to 41.1 km/h; back – from 4.76 to 11.04 km/h.

The clutch is a friction single-disc, dry, permanently closed type, with mechanical control. The rear power take-off shaft can operate in two ranges: synchronous and independent.

Speed ​​range: from 540 to 1000 rpm. The steering of the tractor is hydraulic volumetric, with a type of turning mechanism - a hydraulic cylinder in the steering linkage. The brakes on the MTZ-892.2 tractors are double-disc, dry. The parking brake is independent. Trailer brakes operate via a single-line pneumatic actuator.

The driving front axle on the MTZ-892.2 tractor is composite; assembled from three parts. The front axle is equipped with a self-locking differential; planetary helical wheel gearbox. There are three operating positions in total: automatic, on and off.

The FDA drive consists of two cardan shafts with an intermediate support; FDA control is mechanical, with three operating modes. Automation engages the front axle when the rear axle slips.

The type of rear axle wheel reducer is a cylindrical final drive; differential type - simple, conical. The rear wheels have the option of doubling. This scheme provides the tractor with additional maneuverability and stability when working on difficult soils, with bulky and heavy trailed units.

Specifications

Engine

The Belarus 892 tractor is equipped with a D-245.5 engine. This diesel four-cylinder power unit with a turbine has a power of 65 hp. With. and volume 4.75 l. The engine is water-cooled, has a fuel consumption of 225 g/kW hour, and a rotation speed of 2200 rpm. The fuel supply is located in a tank with a volume of 130 liters.

Transmission and chassis.

MTZ 892 is an all-wheel drive agricultural vehicle, in which a self-locking differential is used in the design of the front axle. It has three technical operating options: off, on and automatic. The differential is automatically engaged in cases of slipping of the rear wheels of the tractor. Another feature of the rear wheels is their ability to double, which increases cross-country ability and stability. The ground clearance of the 892 is 0.65 m.

The transmission uses:

• manual transmission;
• clutch;
• brake system;
• power take-off shaft (PTO).

The MTZ 892 gearbox is made in a 9-speed version, with a multiplier. The clutch is used in a dry and single-disc version. The PTO operates in two modes: independent and synchronous.

Steering

The hydraulic steering of the tractor is particularly sensitive to the slightest movement of the operator - easy and soft control does not require much effort. It is equipped with:

• Dosing pump;
• Hydraulic cylinder in the steering linkage.

In addition, the assembly involves the additional installation of a hydromechanical amplifier.

Hydraulic system

MTZ 892, a tractor that is equipped with a hydraulic system of a separate aggregate type and is equipped with a hydraulic lift. The design features of the system include duplicated outputs for the rear hydraulic lift.

The rear linkage has a lifting capacity of 3.2 tons. The highest pressure in the system is 20 MPa. The hydraulic system gear pump capacity is 45 l/min, and the oil tank capacity is 25.5 l. The hydraulic distributor used is made in three sections.

Electrical equipment

Belarus (MTZ) 892 has its own generator set with an output power of 700 W, which allows it not to depend on the battery charge. It is supplemented by a voltage rectifier that supplies 24 V to the starter and to the user control equipment in the cab.

Unlike the classic MTZ-82, the tractor model with index 892 is equipped with built-in protected headlights, which ensures their durability even in emergency situations. At the same time, it is more reliable than the YuMZ 6 tractor.

Cabin of the tractor "MTZ-892.2"

The operator's workplace at the Belarus MTZ-892.2 was made with the desire to meet current world standards of comfort and safety.

When designing the cabin, modern ROPS technology was used, which provides for the installation of a rigid frame and safety glass. This allows you to protect the tractor driver from serious injuries “in case something happens.”

The glazing is panoramic, the operator has an almost perfect 360-degree view. The windshield and rear window are equipped with windshield wipers. For winter operation there is an efficient heater.

In the summer heat, air circulation in the cabin can be achieved through natural ventilation. To do this, the side windows and the hatch in the cab roof open. Air conditioning is also provided, but only as an additional option, at the request of the customer and for an additional fee.

The operator's chair is made on a spring basis. It is possible to adjust the backrest in an inclined plane. The steering column is also adjustable. The cabin is comfortable, but only for one person. It’s hard to fit two people here, and there’s no additional seating available. As an option, the manufacturer offers an open version of the cabin with a tent frame.

Driver's cabin

The only place in the tractor where they at least somehow took care of comfort is the cabin. It may not contain expensive materials, but everything is done conscientiously. For example, cheap velor upholstery material does not look very good at first glance. But it performs its functions perfectly. And even small cuts cannot damage the surface. And for working equipment, these little things are important. A big plus of MTZ is its all-round visibility.

All walls are made of heavy-duty glass that can withstand impacts. A high-quality overview allows the driver to clearly see the picture and work plan. There are also electric windshield wipers, that is, wipers. On muddy terrain, this device is simply necessary. It is worth noting that MTZ 892 is adapted to work in all seasons. Confirmation of this is the presence of air conditioning and heater, which is not often found in tractors. That is, even at the most critical moments, in summer and winter, the driver of this transport will be in comfortable conditions, which will improve the quality of work.

Hydraulic system. Electrical equipment "MTZ-892.2"

The working volume of the hydraulic fluid tank is 25.5 liters. Its movement in the system is ensured by a pump that creates a pressure of 20 MPa. The volumetric flow of the gear pump, at the rated speed of the diesel crankshaft, is at least 45 liters per minute. In this case, the working volume of this pump is 32 cm3/rev.

The type of rear hydraulic system is separate-unit. For installation of additional equipment, three pairs of hydraulic outlets are provided.

The load capacity of the rear linkage on the suspension axis is 3,200 kg. The rated power of the Belarus MTZ-892.2 tractor generator is 1.15 kW. The rated voltage of electrical consumers of the on-board electrical network is 12V. The rated voltage of the electric starting system is 24V.

Features of operation

The main advantage of the Belarus MTZ-892 is the ability to function normally in conditions of extremely low and extremely high temperatures. High off-road capability gives the car a great advantage when moving. The Belarus MTZ-892 tractor is equipped with special headlights that are reliably protected from possible damage.

The manufacturer optionally offers additional equipment for the Belarus tractor with dual wheels, a hydraulic hook, a pneumatic system, a gearbox with a standard gearbox, and a towing device.

MTZ-892 at work

Owner reviews about the MTZ-892.2 tractor

Contrary to the assurances of dealers, farmers who have tried it in practice note that its power and productivity are still not enough for large areas. Although in field work, under equal conditions with the MTZ-82, it demonstrates higher speeds, the 82nd gradually but noticeably lags behind it.

There are nuances in the operation of the turbine of the D-245.5 engine. The turbine does not work well at low speeds (it lacks power). When the engine is running under load, the turbine has high speed and temperature, and it needs to idle for at least one minute before stopping. Because when the engine stops, the oil pressure stops and the turbine rotates hot without oil, and this is not acceptable. Therefore, you must remember to idle so that the turbine cools down, and after starting the engine, build up the pressure.

Many experienced farmers and machine operators have a strong opinion that the best tractor among MTZ in terms of reliability and simplicity of design is still the MTZ-82. Preferably with a reinforced front axle (like on the MTZ-1221). And “all sorts of bells and whistles like a turbocharged engine and a synchronized gearbox are such a hassle that you’ll cry bitter tears and won’t know where to go with your tractor.” The new generation, on the contrary, is very pleased with the MTZ tractor with a turbocharged engine, which even “sounds much nicer” than a regular one.

Everyone notes the comfortable cabin for work, the efficiency of the fan and stove. Getting into the cabin is convenient: the steps go extremely low to the ground, so getting up to the workplace is not at all difficult.

The steps are metal, but the surface on them is textured, making it impossible to slip on them. But, despite the installed cold start system, many machine operators complain about the difficulty of starting a diesel engine in frosty weather.

Many praised the larger tires compared to the MTZ-82: “Due to the wide tires, working in the field is a pleasure, the tractor practically leaves no trace behind it.”

Cost of the Belarus MTZ-892.2 tractor

The price of the new MTZ-892.2 tractor from official dealers of the Minsk Tractor Plant starts from 1,300,000 rubles. A used tractor of this brand, in good technical condition, can be purchased at prices ranging from 700,000 to 1,000,000 rubles.

On electronic bulletin boards there is also a large amount of additional equipment for aggregation with MTZ-892.2. Including front-mounted (loaders, hay blowers, etc.)

In general, the worthy technical characteristics of the MTZ-892, its advanced capabilities and low operating costs have provided the tractor with a well-deserved reputation as a reliable, economical and highly productive machine - both among domestic and many foreign consumers.

Since Belarus MTZ-892.2 will cope with large volumes of agricultural work on impressive acreage slowly, its “element” is small and medium-sized peasant farms.

The tractor of the Minsk Tractor Plant MTZ-1221 is produced in one of the most popular series. This is primarily due to its versatility, since there are no restrictions for this machine, both in terms of the amount of work and its types. Can operate equally freely over a very wide temperature range in almost any weather conditions. This series was launched by the manufacturer in 1979, at the same time the first copies were manufactured.

Engine

As a rule, the car is equipped with a D260.2 engine produced at the Minsk Motor Plant. This engine model is a 6-cylinder turbocharged engine. Engine power – 130 hp. Fuel tank – 160 liters. Travel speed is 33.8 km/h (forward) and 15.8 km/h (reverse). There is a cold start system, which makes starting the engine much easier in winter. The engine is quite economical and emissions levels are at the level of international standards.

Gearbox In this model, the gearbox is mechanical and operates in six ranges: four forward and two rear. There are four speeds in each range; in total, the box produces 16 forward speeds and 8 reverse. Switched using synchronizers, switching under load is possible without losing power. Cabin The cabin design is relatively comfortable and safe. For safety reasons, the cabin body is equipped with a special frame. To reduce the air temperature in the cabin, tinting is provided. The cabin has a good level of noise insulation, which is especially important, since the tractor can be used in a wide variety of industries with high noise levels. There is a hatch in the cabin roof. Its function is an emergency exit in case of an accident, as well as additional ventilation. The interior is lined with modern upholstery, which only increases the level of comfort. The cabin has a heating system and ventilation. Thanks to the large glass area of ​​the cabin, the driver is provided with a comfortable and wide view in all directions. The rear window is equipped with a locking mechanism and can be opened, which also increases interior ventilation. Only stationary air conditioning is missing. The steering column consists of two hydraulic cylinders, which makes it easy to control. In general, all the main tractor controls are located on the operator’s right side, which is quite convenient. The seat is equipped with a special rotating mechanism, as well as seat belts, providing additional protection to the driver in the event of an emergency.

Advantages and disadvantages of Belarus 892

The main advantages include versatility and multifunctionality. This is achieved due to technical characteristics, design features, convenient switching scheme and rearrangement of additional equipment.

This allows you to work together with more than 50 types of equipment. Main units of trailed, mounted and semi-mounted equipment:

• plows, harrows, cultivators;
• mowers and seeders;
• cargo trailers, semi-trailers;
• fertilizer application equipment;
• balers and loading attachments;
• rakes, tedders, bale wrappers.

In reviews, owners often indicate the following characteristics of the Belarus 892:

• comfortable cabin, unified with the MTZ 622 tractor (installation of an air conditioner is additionally possible);
• engine service life (5000 h);
• comfortable entry and exit from the cabin;
• reliability inherent in the design;
• permeability;
• a successful electrical circuit that ensures reliable operation of electrical equipment;
• maneuverability and controllability characteristics;
• maintainability due to the availability of spare parts, detailed operating instructions and descriptions of the technical systems used;
• economical technical characteristics during operation;
• year-round use.

Among the shortcomings, the owners identify and describe:

• difficulties starting the engine in winter (can be eliminated by using a special heat-retaining cape on the tractor);
• lack of a technical device in the hydraulic system for cleaning and cooling hydraulic oil;
• inconvenient location of the differential lock switch

All modifications of the series

Currently, there are eight modifications of this series: - Basic model. - MTZ-1221L - created for logging work, since the design features allow the tractor to be used for collecting tree logs. - MTZ 1221V.2 - produced until 2011, the vehicle used a reversible control post. - MTZ-1221T.2 - a design feature is the replacement of a solid cabin with an awning frame. Equipped with a sun canopy and a driven front axle. — MTZ-1221.2 – equipped with a special tropical radiator. Built-in additional fuel tank. - MTZ-1221.3 - the vehicle is equipped with a D-260.2S2 engine. Engine power – 131.7 hp. — MTZ-1221.4 – modified design of the model. The diesel engine meets environmental requirements. - MTZ-1221.5 - installed D.260.2S3B engine with a power of 133 hp. The design of the rear view mirror and pipe has been modified. Air emissions at Stage IIIB standard level.

Repair specifics

Repair of this model MTZ-1221, as well as other models, consists of dismantling the components and then replacing broken parts and bearings. It should be noted that due to the increasing complexity of the tractor design, it is becoming increasingly difficult to repair it with your own hands in unsuitable conditions and without special equipment. This series of tractors is quite unpretentious and reliable, however, repairs are often necessary, but due to the design features of the model, they are difficult. It may be noted that the repair of components such as the hydraulic steering drive or the electronic engine control system can only be repaired by specially trained repair personnel. And simply operating this equipment requires special knowledge and training.

Repair of a tractor gearbox consists of repair of mechanical, hydraulic, and electrical parts. The operation of the gearbox depends on both the stable operation of the clutch and the rear axle gearbox. The work also depends on the condition of the gearbox itself. Therefore, repairing one mechanism may ultimately result in replacement or repair of several elements at once. I would like to note that a tractor gearbox can last up to five years, subject to regular and competent maintenance.

Let us note the main malfunctions that are possible in the operation of the gearbox:

— the gear shifts poorly (the clutch needs to be adjusted); — high/low pressure in hydraulics (flushing the bypass valve); — low pressure in the gearbox (it is necessary to add oil to the gearbox hydraulic system).

In general, repairing a tractor is labor-intensive and requires significant financial costs. Particular difficulties are caused by spare parts: bearings, various gears, etc. If we consider the gearbox, then in order to simply find out which gear is installed there, it is necessary to disassemble the entire box. In connection with all of the above, it is recommended to comply with all requirements of the tractor operating manual and timely carry out all routine maintenance work on the machine.

Reviews

I will give my review about this model. I worked on it for about a year and a half. We can say that it is the best tractor I have ever worked on. Comfortable and reliable system. And I’m not the only one who says this, my colleagues are just as happy. The only drawback is the small size of the fuel tank. And so there are no complaints.2. At the time of purchase, there were doubts about how the tractor would work between the rows. I was confused by the width of the wheels and the size of the car itself. All doubts turned out to be in vain - the tractor moves between the rows very smoothly and confidently. Features excellent performance. Two words about the shortcomings. These include rapid bearing failure on the front shaft, which occurs during intensive work on the tractor. Contacts on electro-hydraulic differential lock drives can also oxidize quickly. Advantages – a powerful machine designed for operation over large areas. Relative cabin comfort. Despite its size and power, it is quite economical in terms of fuel consumption. It is not difficult to repair, especially since the manufacturer has service centers in any region.

3. It is not worth taking if the land size is less than 300 hectares. The tank volume is small, and the tractor itself is a bit expensive.

4. Worked at MTZ-1221. I would like to say that the tractor is powerful. I worked hauling timber and had the opportunity to plow while planting forests. This type of plowing is very different from regular field plowing. During hauling, we attached the bucket to the forks and converted the trailer into a timber truck. The inconvenience was that before loading and unloading it was necessary to cordon off. In terms of transportation, it was not much inferior to timber carriers - the Urals. Worked loading sand. Since the bucket volume is large, loading was quick. The tractor has a powerful six-cylinder engine. The tractor is easy to control, even with a heavy load. In winter conditions, lowering the rear linkage is difficult. This is due to the fact that the oil thickens in the cold, and there is no forced lowering option. The panel has a built-in on-board computer. The locking is activated electrically. Consumes quite a lot of fuel. So, while removing timber we had to refuel twice. And one tank is clearly not enough. This is a good tractor, despite being a little expensive.

5. I first encountered this tractor in 2006. Powerful engine – 143 hp with turbocharging. A manual transmission with a built-in pump that allows oil to rise to the upper gears. Two hydraulic cylinders for the rear linkage. Designed to weigh up to five tons. Four-wheel drive. You can turn on the front axle either automatically or manually. Wheel locking is implemented in three modes: “disabled”, “manually engaged”, “automatically engaged”. In two years, by and large, there have been no serious comments on the car. Since the tractor was not new, after some time the clutch had to be completely replaced. The second tractor was already new. Unlike the first car, which had two combined tanks, the new one had only one, and that one was made of plastic. This difference was very noticeable. The intake in the tractor, like that of the car, is installed on top. If a pipe is clogged, you have to disassemble almost the entire cabin to clean it.

Conclusion

According to the machine operators who work on this tractor, it is very popular among them. The tractor has earned this recognition due to its efficiency. We are talking here about both fuel and various oils and other technical fluids for the tractor. Spare parts for this model are also relatively inexpensive. All operators speak highly of the tractor cab. Also positive feedback for the ability to adjust the desired temperature in the cabin. You can operate the tractor in any weather. As you can see, the model has enough positive aspects. The disadvantages include, perhaps, not very good maneuverability. Thus, we can conclude that this model is quite practical, reliable and productive. Thanks to the combination of all the positive qualities described above, this tractor can be noted as one of the best. Any farmer who decides to own a tractor should pay attention to it.

MTZ-892 is a multifunctional wheeled tractor that incorporates the best qualities of most machines produced by the Minsk Tractor Plant. Intended for use in agricultural production, the construction industry and public utilities, the machine is highly reliable, economical and easy to operate.

The excellent technical characteristics of the MTZ-892 and low operating costs have provided the tractor with a well-deserved reputation as a reliable, economical and highly productive machine among both domestic and foreign consumers.

892 Belarus, created on the basis of the MTZ-82.1, differs from its predecessor in a more revving engine with a turbocharging system, larger wheels and a synchronized transmission. In addition to these changes, the developers of the machine also included a heated starter with a voltage of 24 Volts in the tractor ignition system.

Equipped with a universal hydraulic system that allows the tractor to be combined with many different mechanisms, the machine copes well with excavation and loading and unloading operations, as well as with transporting goods using a trailer.

Appearance and ergonomics

The tractor cabin is equipped with a safety frame that complies with OECD requirements, protecting the driver when the machine rolls over. Interior microclimate services - cleaning the air entering the cabin, opening side windows and a sunroof built into the roof.

The large glass area of ​​the cab provides the operator with excellent visibility from all sides and a high level of visual control over the movement of the machine, the operation of attachments and the movement of other objects.

Also, buyers of the tractor are offered its modification with a special frame awning, which, if necessary, can be easily removed, improving visibility from the operator’s seat.

Power point

The high-tech engine installed on the model deserves special attention.

The 892 modification of the Minsk car is equipped with a four-cylinder D-245.5 engine with a volume of 4.45 liters and designed for diesel fuel consumption. This 66-horsepower unit is considered one of the most economical internal combustion engines.

The engine is started using a starting system, which includes a starter and a torch-type electric heater driven by a 700 W generator.

Designed for operation at ultra-low temperatures, the MTZ-892 can be equipped with a special device that allows the use of a highly flammable aerosol mixture to operate the engine in severe frosts.

Design

MTZ-892 is a tractor with a 4x4 wheel arrangement.

Transmission . The 892 model provides for the installation of two gearbox options - a multiplicative type transmission and a gearbox with a traditional gearbox, which allows you to more efficiently carry out agricultural work of all types and any complexity. The operator controls the forward movement of the machine using 18 transmission gears, and 4 backwards. The tractor speed varies in the range from 2.05 to 27.3 km per hour, and when using a gearbox - from 2.5 to 33.9 km per hour.

Steering . Operator comfort in Belarus-892 is ensured by a steering system, which includes a metering pump and a hydraulic cylinder. The use of such a control complex ensures an instant response of the car to the driver’s actions.

Chassis . The front drive axle of the model is equipped with a three-mode self-locking differential. The device can automatically turn on when the rear wheels slip, or be in a constantly on or off state. Brakes – pneumatic, dry, disc type.

At the buyer's request, the tractor is equipped with various mounted mechanisms.

Despite the low productivity of the machine when processing large amounts of soil and the disadvantages associated with the insufficiently efficient operation of the engine starting system, in terms of technical and operational characteristics the machine is not inferior to its European competitors and is considered one of the best in its class.

The main advantage of this tractor is its adaptability to operation in conditions of high and low temperatures, as well as Russian off-road conditions.

Today, both new MTZ-892 and used machines are presented in large quantities on the market.

Transmission

As mentioned above, the composition of the main part of the transmission - the power transmission and intermediate part, the gearbox and the rear axle is absolutely the same and is interchangeable with the same mechanisms and components of the MTZ 82.1 tractor

Power transmission and intermediate part of the transmission

The tractor clutch is single-disk, friction, dry, permanently closed, located in the dry compartment of the housing of the intermediate part of the transmission. The coupling is equipped with a disc with asbestos-free linings or, on request, with metal-ceramic linings. The clutch control drive is mechanical by means of a driven pedal through a system of levers.

Intermediate part of the MTZ 892 transmission

In the wet compartments, lubricated by oil from the general lubrication system of the transmission, the intermediate part contains: a power transmission shaft with a two-speed gearbox of an independent PTO and a drive gear of a gear pump of the tractor hydraulic mounted system, a reduction or increase gearbox of the gearbox.

Also, upon request, in place of the reduction gearbox, a reverse gearbox can be installed, which by its switching ensures duplication of forward gears into reverse gears. This configuration allows convenient control of the tractor when performing loading operations when moving in shuttle mode. The gearbox is controlled by moving the sliding gear using a switching mechanism fork connected to a lever brought into the cabin.

Transmission

The gearbox is mechanical, with sliding cylindrical gears and toothed couplings. The unit provides, taking into account the operation of the reduction gear, 18 forward gears and 4 reverse gears. By switching gears and reduction gear stages, the box generates forward speeds in the range from 2.26 to 41.1 km/h, reverse speeds from 4.76 to 11.04 km/h.

Control of a tractor gearbox with an overdrive gearbox

Gearbox control with reverse gearbox

Additionally, the box can be equipped with a mechanical creeper or hydraulic creeper. The unit is attached with its body to the left hatch in the tractor gearbox housing and provides additional ultra-small technological gears. Also, a gearbox of a semi-independent side power take-off shaft can be installed in the left hatch.

A transfer case is installed on the right side of the gearbox, providing drive to the front axle of the tractor. Power is taken off through an intermediate gear connected by constant engagement with the driven gear of the first stage of the range reducer.

To control the oil level in the box and the entire integrated housing of the tractor transmission, the unit housing is equipped with a control plug on the right and a dipstick in the left hatch cover. During replacement, the oil is drained through the screw plug at the bottom on the right side of the unit body. Oil is refilled through a plug in the cover of the gear shift mechanism in the tractor cabin.

Rear axle

The unit also has a traditional design that is absolutely identical and interchangeable with MTZ 80(82). The main gear is bevel with helical teeth. The drive gear is installed on the shank of the secondary shaft of the gearbox, the driven gear is on the differential housing. The final drives are made in the form of pairs of cylindrical gears. The tractor's dry multi-disc brakes are located on the outer edges of the final drive gears. The differential locking hydraulically controlled friction clutch is located on the left side on top of the left brake housing. Taking into account the tractor's configuration with hydraulic volumetric power steering, the rear axle differential lock does not have an automatic mode and is carried out only when the pedal is pressed, which opens the flow of oil pressure to the clutch.

Rear axle MTZ 892

The brake control pedals are interlocked with the control valve of the single-line pneumatic actuator of the chassis brakes of trailed vehicles, which receives pressure from the standard compressor.

PTO

The tractor power take-off is carried out in two modes: independent and synchronous. Independent operation mode is carried out at two rotation speeds: 540 or 1000 rpm. The independent PTO drive receives directly from the power transmission (clutch) thrust disc. Further, structurally, the rotation transmission is transmitted from a two-speed gearbox by a separate shaft passing through the internal cavity of the intermediate shaft of the gearbox. Then to the planetary gearbox located in the rear wall of the rear axle.

Synchronous operation is carried out at a speed of 3.44 PTO revolutions per 1 meter of travel. The drive mode is received from the intermediate shaft of the gearbox.

Rear PTO control

• The speed of the independent mode is switched by moving a fixed leash in the lower part of the housing of the intermediate part of the transmission.
• Switching modes (independent - synchronous) is carried out using a dog clutch located in the lower part of the cavity of the rear axle housing. The shift lever has three positions: middle - neutral position, far right - independent mode is on, far left - synchronous mode is on.
• Direct engagement of the rear PTO is carried out using a lever connected by rods to band brakes to control the planetary gearbox. The extreme forward position corresponds to “PTO engaged”, the extreme rear position corresponds to “PTO engaged”

The side PTO, installed to the left gearbox hatch with its own separate housing, receives drive from the first gear and reverse gear shaft. Activation is carried out by a gear moving along the splines and controlled by a driver brought into the cabin.

Front axle and drive

The front axle drive has a standard design completely identical to the MTZ 82. The transfer case ensures that the front axle is turned on and off, where the drive has two activation modes - “automatic” and “forced”. The intermediate drive support receives rotation through the driveshaft from the transfer case and acts as a unit that smoothes out negative loads. The drive mechanism and FDA are protected by the actuation of a friction clutch as part of the support.

MTZ 892.2 with FDA with planetary spur gearboxes

As mentioned above, the two modifications of the tractor differ in the type of front drive axle installed on the tractor. The MTZ 892 model is equipped with a 72-2300015-A-04 front axle with bevel gear pairs in wheel reducers. MTZ 892.2 front axles with planetary spur gearboxes of brands 822-2300014-04 and 822-2300014-02. The bridges include a main gear in the form of a pair of bevel gears with helical teeth and a self-locking limited slip differential.

MTZ 892 with FDA with bevel gear pairs in wheel reducers