Dear visitors of the site "" today we will consider detailed instructions on how to make a mini-tractor with an engine from a motorcycle "Ural" with your own hands. This tractor is created on the basis of a breaking frame welded from a professional pipe with a section of 100x40 mm. The engine is installed from a Soviet heavy motorcycle "Ural" purchased from a nearby scrap metal collection point. There are 2 boxes on the tractor, one "native" motorcycle, and the second from the "Moskvich-412" car. The tractor has four-wheel drive on all 4 wheels 4x4. The engine cylinders are equipped with additional air cooling, carried out from the adapted motors of the VAZ stoves, namely the fans in the tin case. Steering, rods "Moskvich" It also aggregates a plow, a car trailer, a blade and other useful hinges. Ignition on the tractor is electronic.

Living in a rural area, such an assistant is simply irreplaceable, with its help you can plow and cultivate a vegetable garden, transport various cargoes on a trailer (firewood, manure for the garden, hay, crops harvested from the site) In general, the technique is very useful.

Let's take a look at step-by-step photos of assembling a mini-tractor.

Materials

1. engine and gearbox from the Ural motorcycle
2. professional pipe 100x40 mm
3. bridge VAZ 2103
4. Checkpoint "Moskvich-412"
5. wheels VAZ

Tools

1. welding inverter
2. LBM (Bulgarian)
3. drill
4. set of wrenches
5. a hammer
6. roulette
7. welding corner

Step-by-step instructions for creating a mini-tractor with an engine from the Ural motorcycle.

First of all, the frame was welded, it will consist of two parts and interconnected by a breaking point. A 100x40 mm pipe, 2000 mm long and 950 mm wide was taken as a material.
Tractor transmission, shortened rear axle stockings from a VAZ 2103, torque from the checkpoint is transmitted through a chain drive to an asterisk, and from it through shortened cardan shafts to the front and rear axles. Swivel frame assembly.

The frame is assembled and the wheels are installed.
Installation of the checkpoint from the car "Moskvich-412"
The engine from the Soviet heavy motorcycle "Ural" was bought from the metal collection point and restored.


Electronic ignition from a VAZ 2108 car.
Installation of electrical equipment, as well as additional forced cooling for engine cylinders.
Turn signals and brake light.


Tie rod from Moskvich.
Here is such a wonderful mini-tractor.

This tractor has good characteristics and optimal power density, which allows it to plow the land with a plow with two dumps, and haul a car trailer with a load of more than 500 kg. Also, the tractor has a blade for cleaning snow in the winter. You can watch the video and make sure. pleasant viewing.

We hope you liked the material. Thank you for attention!

Much has been said about Ural motorcycles, but not many people know that their history begins back in 1941.

And for 70 years more than 3 million units of two-cylinder heavy motorcycles "Ural" have been produced. This is the only Russian motorcycle that has received recognition abroad. At present, there are even clubs for fans of the Ural motorcycle in the USA, England, Australia and other countries.

It would seem that "Ural" is known to everyone, but few people know that now, on the basis of it, several different modifications have been created.

IMZ-8.103-10. The motorcycle is equipped with a reverse gear, has a telescopic front fork.
A variation of this modification is IMZ-8.103-40 "Tourist". It has a long-lever fork, it is completed with an additional trunk and tires of increased cross-country ability to order.
IMZ-8.107. A more passable version of the Ural motorcycle due to the differential in the power train and the sidecar wheel drive.
This modification is the base for the Ural GEAR-UP army motorcycle, which has a turret for the PKK, alternative optics, tires of increased cross-country ability and is equipped with a trench tool.
IMZ-8.503. It does not have a passenger sidecar, but it is equipped with a lifting body designed for a load of 150 kg.
IMZ-8.903. This modification is designed for the police patrol service. It has an additional siren, warning lights, brackets for fixing special equipment. Depending on the area of \u200b\u200buse, they can be equipped with a liquid-cooled motor.
IMZ-8.401. Cargo tricycle. This modification is designed for loads up to 500 kg. This is facilitated by the rear axle from the car, suspended on springs, hydraulic drive, disc wheels.
So it turns out that the tuning of the Ural motorcycle is produced not only by craftsmen in their own garage with their own hands, but also by the state on an industrial scale.

Tags: Diy Ural motorcycle tractor

HIGH QUALITY LEATHER GLOVES FOR A WELDER Assembling a mini tractor (5 series).

19 Feb 2019 - 2 minutes - Added by the user Useful homemade products General overview of a homemade tractor with a breaking frame ... Homemade tractor with an engine from a Ural motorcycle. Useful ...

Heavy class motorcycles URAL, DNEPR | Topic author: Anatoly

Generator 462.3701 (tractor) to the URAL

Vladimir (Rasputin) How many watts?

Andrey (Adhira) 700

Serge (Chandak) 50A 700 Watt

Serge (Chandak) How did you make the adapter?

Sergey (Robb) INTERESTING HOW DOES THE TRACTOR .. THE GENERATOR LEAD IN THE URALS? .. I HAVE A MINIMUM 2 PIECES PER SEASON-JUST STOP WORKING-ON MY DIODE BRIDGE IS BURNING .. GIVING FOR REPAIRS-RIDING .. AND TWO .. AGAIN IN REPAIR-WHAT IS THE REASON .. DON'T UNDERSTAND, MAYBE KNOW ???

Ilya (Dallas) Probably you like to disconnect the battery while the engine is running?

Roman (Hanka) I had the same crap. I stood at 150 watts and burned one after the other, but I had an overload of the generator, especially if I turned on all the lights. Now there is a G-700 and everything is in order. True, there is a small minus, at idle rpm, the generator does not work, if you add a little and everything is normal. The tractor generator does not have enough idle rpm.

Roman (Hanka) what are you 10 headlights that cling to that you lack the Ural

Musa (Kumari) I also want to stir up with such a gene

vot (Adaline) such a generator of revolutions is not afraid))) and 150 times normally gave the anchor thrown out))

vot (Adaline) I put it and forgot about it)))

vot (Adaline) and before the tractor, probably a dozen changed 150 current))

Roman (Hanka) I have ural for 6-7 years, I have never had a gene without covering

Alexander (Mellissa) there is a small option so that at low revs he gave out a normal current, you need to grind another gear and this gear from a six-volt generator is a little smaller and more teeth.

vot (Adaline) well, here we can say that it was lucky)))

vot (Adaline) more than 90 traveled often ???

Roman (Hanka) yes no, I lived in the village, you can't drive too much

Musa (Kumari) Is there info about the puck?

ツ ॡ ﮫﮩﮫ Daniyar (Kahakea) Which tractor is the generator from?

How to make a tractor from a motorcycle Ural photo | news, 2016

A homemade tractor with an engine from a Ural motorcycle ... General ... Do-it-yourself installation of hydraulics on a mini-tractor from a walk-behind tractor. Show ...

Mini-tractor from the Ural-motorcycle - Metal forum

20 Jan 2012 ... Mini-tractor from the Urals-motorcycle: z_853e15d0.jpg; A mini-tractor from .... I think maybe someday they will reach this point. But I ...

First of all, homemade mini-tractors are popular among owners of small subsidiary farms, since the use of large-scale factory equipment on a small land area, in most cases, is not rational and very costly. On the contrary, a small mini-tractor will perfectly cope with the task of plowing a vegetable garden, mowing grass, transporting small-sized cargo, etc. In terms of its functionality, such a unit is not inferior, and sometimes, much superior to specialized tractors.

A mini-tractor, made by hand, will not only become an indispensable assistant in small-scale farming, but will also significantly save money. After all, the costs of assembling such a "miracle machine" will pay off in just one season. All parts and main mechanisms can be removed from broken agricultural equipment, or purchased for disassembly at fairly low prices.

Any person can make a homemade mini-tractor. This requires minimal knowledge of technology and, of course, desire. At the initial stage of work on a homemade mini-tractor with your own hands, you will need drawings. When choosing a drawing, you need to decide on the type of mechanism that you want to get as a result.

The “break” mini-tractor has become very popular with private farmers. The essence of this model on an articulated (breaking) frame is that a two-wheeled trolley was attached to the walk-behind tractor, and the steering is equipped with an automobile type with a 4-wheel drive (4x4).

Such a mini-tractor is distinguished by its compact size, small turning radius, excellent tractive power and proved itself well off-road. In operation, it is quite simple and economical.

But somehow the opportunity presented itself to purchase inexpensively not a new, but quite efficient power unit from the Ural motorcycle. This prompted me to the next - the third modification of the machine, which has already been implemented.

The mini-tractor layout remained the same - with a “breaking” frame. But the former "Izhevsk" engine gave way to a more powerful (and most importantly - more reliable and not so whimsical) four-stroke power unit from the Ural motorcycle. Another drive axle appeared on the rear half-frame. It, like the front one, is also from the Moskvich-412 car. Many units were applied from the previous modification, such as semi-frames (albeit with minor alterations), gearbox, intermediate chain reducer, fuel tank and lining.At first, the forced air cooling system of the engine also remained the same, changing only the fan drive and dividing the air flow from it by two cylinders. But later, due to its low efficiency, it still had to be altered by installing a “personal” fan above each cylinder. This allows you to operate the mini-tractor under load for a long time, even in hot weather.

Now more about the design of the mini-tractor. Its basis is two semi-frames of a simple rectangular shape: the front one with dimensions in the plan is 900x360 mm and the back one - 600x360 mm. Although they were made at different times, they were both welded from steel channel No. 8 (the wall is 80 mm high and 4.5 mm thick, the width of the shelves is 40 mm each with variable thickness). The ends of the sections of channels for docking "on the mustache" cut off at an angle of 45 °.

On the front semi-frame there are two cross-members made of 50x30 mm rectangular pipe sections (laid flat), and which are a subframe of the power unit. It also has a wall made of steel sheet 12 mm thick and several platforms and brackets are welded for fastening units, mechanisms and components.

A stand is welded to the rear half-frame at the back, made of a rectangular pipe 80x80 mm (welded from two sections of channels No. 8, joined by the edges of the shelves) for mounting a hitch on it, to which tillage and other agricultural implements are attached. And in front there is a vertical plate for the swivel unit (more about it later), reinforced on both sides with kerchiefs. Both the stand and the plate are made from the same 12 mm steel plate. From above, the semi-frame is covered with a flooring made of sheet steel 3 mm thick. Ahead, a platform made of the same steel sheet is subsequently attached to cover the “breaking” node. The gas and clutch pedals are mounted on it. The semi-frames are interconnected by a "breaking" node, which is a flat (uniaxial) cardan mechanism (hinge). Its forks are welded from 12mm steel sheet. Moreover, the wall of the front fork is welded directly to the rear cross-member of the front half-frame and reinforced with kerchiefs. The arms of the forks are also reinforced with small kerchiefs made of the same steel sheet. The trunnions and bearing housings for this hinge are cut off and used together with bearings and lock washers from the corresponding units of the propeller shaft of the KamAZ car.

Suspensions of all tractor wheels are dependent and rigid. And so that the wheels of any of the bridges do not hang when the tractor moves through bumps and pits, the semi-frames still have the ability to "rotate", or rather deviate by an angle of about 15 ° clockwise or counterclockwise from the middle position relative to each other. This happens due to the swivel used in the coupling of two half-frames, made from the hub of the front wheel of a UAZ car and installed in the front of the rear half-frame. To prevent too much rotation of one half-frame relative to the other, a 38x10x12 mm tooth is welded on the hinge plate, and two of the same stops are welded to the rear half-frame plate.

The engine is mounted on the cross members of the front half-frame and is secured here through the lugs with two long bolts. Rotation from the engine through a soft connection (coupling) from the Ural motorcycle is transmitted to the primary (input) shaft of the gearbox from Moskvich-412. The gearbox is attached to the frame through a 12 mm thick welded plate with four bolts. The far protruding end of the secondary (output) shaft of the box rests on a bearing installed in the bulkhead. At this end of the output shaft, a hub is fitted with a 17-tooth sprocket - the driving sprocket of the chain reducer. The other (driven) sprocket with 68 teeth is mounted on the front propeller shaft. The sprockets are connected by a chain with a pitch of 22.225 mm. The gear ratio (decrease in angular speed or increase in torque) of the chain reducer is 1: 4. Rotation is transmitted to the main gear of the front axle directly from this shaft, and to the rear axle through the cardan mechanism of the “breaking” unit and then through the rear propeller shaft. The rear propeller shaft consists of two spline-type links. For the first link, a spline end was used, cut off from the secondary shaft of the "Moskvich" gearbox, which is welded to the cardan shaft. The second link is borrowed from the "Muscovite" driveshaft. Due to the spline connection of the links, the rear shaft will be lengthened when turning.

Axles from "Moskvich-412" (both front and rear) are narrowed to a wheel track width of 700 mm. Each of them has the end parts of the semi-axle casings cut out on both sides of the main gear housing (motorists call them more often "stockings"), and the flanged limit switches (the extreme parts of bridges with bearing seats and threaded holes in the ends) are welded again to the remaining parts of the casings. But not at once. At first, the semiaxes were also shortened accordingly (the middle pieces were cut out from them). Then, to the outer flange ends of the semiaxes, the inner spline ends are tied by welding, and after mutual alignment, both parts are finally welded. Further, the finished shortened axle shafts were screwed to the cut off end switches of the bridge with standard screws and their inner ends were inserted into the spline holes of the differential gears. And only after alignment of the limit switch and the rest of the casing with the crankcase, the parts were welded.

At the gearbox from "Moskvia-cha-412" to the protruding end of the input shaft for its connection to the power unit, the splined end of the propeller shaft from the Ural motorcycle is welded. The length of the protruding part of the docked input shaft is 80 mm. But before that, the abutting ends of the shafts are being finalized. On one, a spike is made, and on the other, a corresponding groove is cut. The hole in the crankcase is covered with a homemade cover with an oil seal, screwed to the crankcase with four MB screws.

On the other side of the gearbox, the extension (casing) of the gearbox output shaft is cut at a distance of 20 mm from the box body, and the end (outlet) is closed with a homemade cover with a hole for the output end of the shaft and an annular groove in its walls for the oil seal. The cover is screwed to the cut-off extension with four MB screws into the corresponding threaded holes pre-made in its walls.

The steering column is attached to a plate welded to the frame with three M10 bolts. To stiffen the plate, two gussets made of steel sheet 5 mm thick are welded to it.

In order for the rotation of the steering wheel to coincide with the turn of the tractor, the direction of the worm of the steering mechanism is changed to the opposite (the worm is mounted on the shaft with the other end). To do this, we had to make a slot in the bearing adjusting nut from the bottom of the crankcase and a hole in its cover. When cornering, the steering wheel always remains in front of the driver, although the steering wheel is on the front half-frame, and the driver's seat is on the rear.

Since the engine turned out to be located quite high above the ground, the engine is started through an intermediate shaft installed at the bottom of the power unit in bushings welded to the frame. On one end of the shaft, a kick-starter lever shortened to 140 mm is fixed, on the other - a thrust, also 140 mm long.

The engine cylinders are equipped with forced air cooling. At first, it was carried out from one central (common) fan, but it turned out to be not so effective. Therefore, he modernized it, equipping each cylinder with its own impeller. The fan drive was made from the shaft of a converted standard "Ural" generator through an angular gearbox, the housing of which was a two-inch water-supply fitting square. The gears for the bevel gear are taken from the corresponding unit of the Druzhba-4 chainsaw. I cut off a limit switch from one gear-shaft, drilled and drilled a hole in it for the diameter of the generator rotor shaft, planted and welded. The other gear shaft assembly with bearings and a cage was installed in the bevel gear housing on the other side. A pulley is mounted on the output shaft of this gearbox, from which rotation is transmitted through a V-belt transmission to the pulleys of two fans located on top of each cylinder. The fan bearing races are welded to the bonnet frame. The pulleys are from the washing machine, and the fans are from the heater radiator of the UAZ-469 car.

Since the standard "Ural" generator is used in the forced air cooling system, to ensure the operation of the engine (ignition of the combustible mixture), a magneto from a motor pump is used. The magneto is driven from the camshaft, to which it is docked at the front through a homemade drum adapter.

A fuel tank with a capacity of 8 liters, with a redone wiring - now for two carburetors, used from a walk-behind tractor.
The main gearbox is the "Muscovite". Switching is carried out by a handle, fixed on the upper fork of the front half-frame of the "breaking" hinge. Gear shifting of the "Ural" power unit is carried out with the help of the handle, located to the left of the steering wheel on the dashboard, by means of a rod.

The tractor hitch is made of strips of sheet (12 mm) steel, the length of the lower hitch links is 450 mm, the upper ones - 180 mm. The lifting and lowering of the linkage during operation is carried out using a lever located to the right of the driver's seat. The length of the lever is 550 mm, which allows you to raise and lower any mounted agricultural implement suitable for a mini-tractor without great effort.
Since the suspension of the mini-tractor is rigid, the seat is made soft. It is mounted on a support of two pairs of triangular plates, bolted together. Due to the mutual displacement of the plates, you can change the height of the seat, its distance to the steering wheel. It is also possible to adjust the backrest angle.

The engine ("gas") and the clutch are controlled using standard motorcycle cables, but not from the handles, but through the pedals located on the platform covering the "breaking" node and attached to the rear frame.
The wheels of the mini-tractor are all the same, measuring 6.15x13 inches, used from the Moskvich-412 car. From him and the hydraulic brake system, its wiring along the frame - copper pipes and flexible hoses.

The mini-tractor has approximately the same driving characteristics as its predecessor with an engine from the Izh "Planet-4" motorcycle, but the first is much more powerful and more reliable in operation. Thanks to two gearboxes (the power unit itself and from the Moskvich-412), installed one after the other, a wide selection of speed modes is obtained, the tractor has 16 forward gears and 4 backward. With both axles constantly working, the tractor began to overcome the seemingly insurmountable obstacles for it without any problems, even with a trailer and load.

It may seem to some that the construction of a mini-tractor is too heavy. The way it is. But this is more a plus than a disadvantage. Firstly, this ensures the strength of the loaded units, and secondly, it increases the adhesion of the wheels to the ground, which is important when using a mini-tractor on plowing, and even more so as a bulldozer for raking snow drifts in winter.

The mini-tractor is used for cultivating the land, transporting goods up to 900 kg on a trailer trolley, dragging a horse mower when harvesting hay, cleans paths from snow in winter and does much more that is needed on the farm.

Homemade mini tractors with a Ural engine are needed in the country, in the garden or on a small subsidiary farm. There is no need to buy oversized equipment, since it will not recoup the cost of the tractor. But you can assemble a tractor yourself with an engine from an IZH motorcycle. A homemade tractor is usually small in size and is intended to plow in the garden, mow the grass, transport small loads, incl. root crops, garbage and firewood.

The engine from the IZH motorcycle has high power and performance and is excellent for agricultural work.

Homemade mini tractors

Below we will consider how to make homemade mini tractors with a Ural engine.
These types of homemade products are based on the use of an articulated or breakable frame. It is necessary to attach a two-wheeled cart to the walk-behind tractor, put the steering control, which is based on the 4-wheel drive model.

A homemade mini tractor with a motor from the Urals is reliable and powerful, it has the following characteristics:

1. A drive axle must be installed on the rear frame.
2. Chain intermediate gearbox.
3. Fuel tank.
4. Facing.
5. Fans installed above each cylinder, which allows the tractor to be used in hot weather, to work on it for a long time.

How to make a mini tractor with a motorcycle engine with your own hands

The design of a homemade tractor with an engine from a Ural motorcycle is as follows.

The base consists of 2 semi-frames forming a rectangle. The front part should measure 90x36 cm, and the back - 60x36 cm. You can weld half-frames yourself using a steel channel. To dock the channels correctly, you need to cut the ends at an angle of 45º.

On the front half-frame, you need to install 2 crossbeams, which are made of a rectangular pipe. It should measure 5x3 cm and fit flat. Crossmembers are needed to make a subframe for the motor.

A wall made of steel should be installed on the semi-frame. Brackets and platforms must be welded to the wall, intended for the installation of units, mechanisms, units.

See " Review of the universal tractor Belarus MTZ-92P and its modifications

A stand is welded onto the rear semi-frame, which can be made from a pipe. Hinges are attached to the rack. They are necessary for attaching attachments. On the front of the rear frame is mounted the vertical plate required for the swivel assembly. It is strengthened with kerchiefs.

The lower half-frame is covered with a steel deck, and a platform with gas and clutch pedals is welded onto it.

The frames are interconnected by a breaking point, which in structure is a hinge or gimbal.

For the IZH motor, rigid and dependent suspensions are needed, which will allow you to supply wheels of the required size. A do-it-yourself mini-tractor provides for the installation of the engine on the transverse crossbars of the front half-frame, which is then bolted through the eyes.

The gearbox is installed nearby, for which you need to use bolts. The chain clutch must be properly aligned for the gearbox and speed to work well. On the first link of the gearbox, you can use the spline end, which is removed from the Moskich gearbox, and the second from its propeller shaft. The splined connection allows the rear shaft to be significantly longer.

Next, we will consider how to make homemade mini tractors. The steering column must also be placed on the frame, which must be firmly bolted. A hole must be made in the bearing adjusting nut to allow the column to be connected to the steering wheel.

The engine will be started through the intermediate shaft, at one end of which a shortened kick starter is fixed, and at the other - the thrust.

The cylinders should be equipped with a forced cooling system. From a motorcycle IZH or Ural, a fuel tank, a motor pump, an additional gearbox are used.

To make a homemade tractor with an engine from a Ural motorcycle, you need to make hinges yourself using sheet steel for this. These parts should be lowered and raised using a special lever that is installed on the right side of the operator's seat. The lever should be no more than 55 cm long, which allows you to adjust the attachment.

The mini-tractor, about which the story will go, is already the third modification of my home-made construction, originally designed as a walk-behind tractor and built by me back in 1985. It was a machine with a power unit from the Izh-Planeta-4 motorcycle, equipped with a forced air cooling system and equipped with an intermediate reduction chain reducer. The walk-behind tractor was intended mainly for cultivating the land. For transport work, a single-axle cart with a seat and a body was attached to it from behind. The wheels of the cart were, of course, not driving. The walk-behind tractor did not have a reverse gear either, and during its operation I felt on myself how difficult it was to handle it, and realized that it loses in many ways to the tractor.

It was then that the idea arose to attach a rear two-wheeled cart to the walk-behind tractor according to the principle of a "breaking" frame, equip it with an automobile-type steering system, which eventually did. So the walk-behind tractor became a mini-tractor.

The mini-tractor had a small size, a small turning radius, good traction characteristics and off-road capability. And on the road, he could reach speeds of up to 40 km / h. The track of the front and rear wheels was only 700 mm, and the base (distance between their axles) was 1 m. The car could drive through a gate only 90 cm wide, that is, into a wicket.

Over the years of operation of the mini-tractor, there were no breakdowns of either the structural elements of the structure, or the bridges, or the transmission. All malfunctions (or rather, whims) happened mainly in the engine - the absence of a spark, fuel supply, splashing candles with oil and others inherent in two-stroke engines.

But somehow the opportunity presented itself to purchase inexpensively not a new, but quite efficient power unit from the Ural motorcycle. This prompted me to the next - the third modification of the machine, which has already been implemented.

1-wheel (from the "Moskvich-412" car, 4 pcs.);

2-front driving axle (from the "Moskvich-412" car);

3 - kick starter;

4-power unit (from the Ural motorcycle);

5- magneto (from a motor pump);

7-intake manifold (from the Ural motorcycle);

8-carburetor (from the Ural motorcycle);

9-gear change mechanism (gearbox) from the Ural motorcycle (lever, rod, handle);

10-air filter (from the tractor);

11 - chain transmission;

12-steering (from the "Moskvich-412" car);

13 - gear change mechanism (lever and rod) of the check point from the Moskvich-412 car;

14-linkage control lever;

15-seat;

16-seat back;

17 - seat backrest tilt adjustment unit (2 pcs.);

18 - upper seat half-rack (steel sheet s12, 2 pcs.);

19-lower seat half-rack (steel sheet s12, 2 pcs.);

20-hitch;

21-rear drive axle (from the "Moskvich-412" car);

22-rear composite propeller shaft with spline connection "Moskvich-412");

23-swivel (from the front wheel of the UAZ-469 car);

24-cardan transmission joint;

25- "breaking" knot half-frames;

26-front propeller shaft;

27-hood (steel sheet s1);

28 - drive of the forced air cooling system;

29-fuel tank (from the walk-behind tractor);

30-front wheel fender (steel sheet s1, 2 pcs.);

31 - rear wheel fender (steel sheet s 1.2 pcs.);

32-pedal "gas";

33-brake pedal;

34-clutch pedal;

35-magneto cover (headlight from the tractor);

36-facing;

37-muffler;

38-duct (dural sheet s1, 2 pcs.)

The mini-tractor layout remained the same - with a “breaking” frame. But the former "Izhevsk" engine gave way to a more powerful (and most importantly - more reliable and not so whimsical) four-stroke power unit from the Ural motorcycle. Another drive axle appeared on the rear half-frame. It, like the front one, is also from the Moskvich-412 car. Many units are from the previous modification, such as semi-frames (albeit with minor alterations), gearbox, intermediate chain reducer, fuel tank and cladding. At first, the forced air cooling system of the motor also remained the same, changing only the fan drive and dividing the air flow from it into two cylinders. But later, due to low efficiency, it still had to be altered, too, by installing a "personal" fan above each cylinder. This allows you to operate the mini-tractor under load for a long time, even in hot weather.

Now more about the design of the mini-tractor. Its basis is two semi-frames of a simple rectangular shape: the front one with dimensions in the plan is 900 × 360 mm and the back one - 600 × 360 mm. Although they were made at different times, they were both welded from steel channel No. 8 (the wall is 80 mm high and 4.5 mm thick, the width of the shelves is 40 mm each with variable thickness). The ends of the sections of channels for docking "on the mustache" cut off at an angle of 45 °.

1 - engine;

2 - a gearbox and a clutch;

3 - output shaft of the power unit;

4-elastic (elastic) coupling (from the motorcycle "Ural");

5 - primary (splined) gearbox shaft (from the Ural motorcycle);

6-check point (from the Moskvich car);

7 - secondary (output) gearbox shaft;

8-small chain sprocket (z \u003d 17);

9-chain (t \u003d 22.225);

10-large driven chain sprocket (z \u003d 68);

11 - front propeller shaft;

12 - cardan joint (from the KamAZ car);

13-rear propeller shaft;

14-swivel;

15-spline connection of the rear propeller shaft links (from the Moskvich car);

16 - main gear drive gear (from the Moskvich car, 2 pcs.);

18-semiaxis (from the "Moskvich-412" car, 4 pcs.);

19-wheel (from the car "Moskvich-412", 4 pcs.)

On the front semi-frame there are two cross-members made of 50 × 30 mm rectangular pipe sections (laid flat), and which are a subframe of the power unit. It also has a wall made of steel sheet 12 mm thick and several platforms and brackets are welded on for fastening units, mechanisms and components.

A stand is welded to the rear half-frame at the back, made of a rectangular pipe 80 × 80 mm (welded from two sections of channels No. 8, joined by the edges of the shelves) for mounting a hitch on it, to which tillage and other agricultural implements are attached. And in front there is a vertical plate for the swivel unit (more about it later), reinforced on both sides with kerchiefs. Both the stand and the plate are made from the same 12 mm steel plate. From above, the semi-frame is covered with a flooring made of sheet steel 3 mm thick. Ahead, a platform made of the same steel sheet is subsequently attached to cover the “breaking” node. The gas and clutch pedals are mounted on it.

The semi-frames are interconnected by a "breaking" node, which is a flat (uniaxial) cardan mechanism (hinge). Its forks are welded from 12mm steel sheet. Moreover, the wall of the front fork is welded directly to the rear cross member of the front half-frame and reinforced with kerchiefs. The arms of the forks are also reinforced with small kerchiefs made of the same steel sheet. The journals and bearing housings for this hinge are cut off and used together with bearings and lock washers from the corresponding units of the propeller shaft of the KamAZ vehicle.

Suspensions of all tractor wheels are dependent and rigid. And so that the wheels of any of the bridges do not hang when the tractor moves through bumps and pits, the semi-frames still have the ability to "rotate", or rather deviate by an angle of about 15 ° clockwise or counterclockwise from the middle position relative to each other. This happens due to the swivel used in the coupling of two half-frames, made from the hub of the front wheel of a UAZ car and installed in the front of the rear half-frame. To prevent too much rotation of one half-frame relative to the other, a 38x10x12 mm tooth is welded on the hinge plate, and two of the same stops are welded to the rear half-frame plate.

The engine is mounted on the crossbars of the front half-frame and is secured here through the lugs with two long bolts. Rotation from the engine through a soft connection (clutch) from the Ural motorcycle is transmitted to the primary (input) shaft of the gearbox from Moskvich-412. The gearbox is attached to the frame through a 12 mm thick welded plate with four bolts. The far protruding end of the secondary
(output) shaft of the box is supported by a bearing installed in the bulkhead. At this end of the output shaft, a hub is fitted with a 17-tooth sprocket - the driving sprocket of the chain reducer. The other (driven) sprocket with 68 teeth is mounted on the front propeller shaft. The sprockets are connected by a chain with a pitch of 22.225 mm. The gear ratio (decrease in angular speed or increase in torque) of the chain reducer is 1: 4. Rotation is transmitted to the main gear of the front axle directly from this shaft, and to the rear axle - through the cardan mechanism of the “breaking” unit and then through the rear propeller shaft. The rear propeller shaft consists of two spline-type links. For the first link, a spline end was used, cut off from the secondary shaft of the "Muscovite" gearbox, which is welded to the cardan shaft. The second link is borrowed from the "Muscovite" cardan shaft. Due to the spline connection of the links, the rear shaft will be lengthened when turning.

Axles from "Moskvich-412" (both front and rear) are narrowed to a wheel track width of 700 mm. Each of them has the end parts of the semi-axle casings cut out on both sides of the main gear housing (motorists call them more often "stockings"), and the flanged limit switches (the extreme parts of bridges with bearing seats and threaded holes in the ends) are welded again to the remaining parts of the casings. But not at once. At first, the semiaxes were also shortened accordingly (the middle pieces were cut out from them). Then, to the outer flange ends of the semiaxes, the inner spline ends are tied by welding, and after mutual alignment, both parts are finally welded. Further, the finished shortened axle shafts were screwed to the cut off end switches of the bridge with standard screws and their inner ends were inserted into the spline holes of the differential gears. And only after alignment of the limit switch and the rest of the casing with the crankcase, the parts were welded.

At the gearbox from Moskvich-412, the splined end of the propeller shaft from the Ural motorcycle is welded to the protruding end of the input shaft to connect it to the power unit. The length of the protruding part of the docked input shaft is 80 mm. But before that, the abutting ends of the shafts are being finalized. On one, a spike is made, and on the other, a corresponding groove is cut. The hole in the crankcase is covered with a homemade cover with an oil seal, screwed to the crankcase with four M6 screws.

On the other side of the gearbox, the extension (casing) of the gearbox output shaft is cut at a distance of 20 mm from the box body, and the end (outlet) is closed with a homemade cover with a hole for the output end of the shaft and an annular groove in its walls for the oil seal. The cover is screwed to the cut extension with four M6 screws into the corresponding threaded holes previously made in its walls.

The steering column is attached to a plate welded to the frame with three M10 bolts. To stiffen the plate, two gussets made of steel sheet 5 mm thick are welded to it.

In order for the rotation of the steering wheel to coincide with the turn of the tractor, the direction of the worm of the steering mechanism is changed to the opposite (the worm is mounted on the shaft with the other end). To do this, we had to make a slot in the bearing adjusting nut from the bottom of the crankcase and a hole in its cover. When cornering, the steering wheel always remains in front of the driver, although the steering wheel is on the front half-frame, and the driver's seat is on the rear.

1-splined tip (from the propeller shaft of the Ural motorcycle;

2-input shaft of the check point;

3 - stuffing box;

4-front cover (steel);

5 - screw М6 (4 pcs.);

6-frame partition;

7-gearbox housing;

8-back cover (steel);

9-gland;

10-sprocket hub (steel);

11-drive chain sprocket;

12 - bearing housing;

13 - bearing;

14-post;

15-frame bracket;

17-frame spar

Since the engine turned out to be located quite high above the ground, the engine is started through an intermediate shaft installed at the bottom of the power unit in bushings welded to the frame. On one end of the shaft, a kick-starter lever shortened to 140 mm is fixed, on the other - a thrust, also 140 mm long.

The engine cylinders are equipped with forced air cooling. At first, it was carried out from one central (common) fan, but it turned out to be not so effective. Therefore, he modernized it, equipping each cylinder with its own impeller. The fan drive was made from the shaft of a converted standard "Ural" generator through an angular gearbox, the housing of which was a two-inch water-supply fitting square. The gears for the bevel gear are taken from the corresponding unit of the Druzhba-4 chainsaw. I cut off a limit switch from one gear-shaft, drilled and drilled a hole in it for the diameter of the generator rotor shaft, planted and welded. The other gear shaft assembly with bearings and a cage was installed in the bevel gear housing on the other side. A pulley is mounted on the output shaft of this gearbox, from which rotation is transmitted through a V-belt transmission to the pulleys of two fans located on top of each cylinder. The fan bearing races are welded to the bonnet frame. The pulleys are from the washing machine, and the fans are from the heater radiator of the UAZ-469 car.

1 - half-shaft flange;

2 - trunnion part of the semiaxis;

3-end socket-bell of the bridge beam;

4-rod (middle part) of the semi-axis;

5-casing ("stocking");

6-splined (inner) half-shaft end;

7-main gear housing;

8-sided gear

Since the standard "Ural" generator is used in the forced air cooling system, to ensure the operation of the engine (ignition of the combustible mixture), a magneto from a motor pump is used. The magneto is driven from the camshaft, to which it is docked at the front through a homemade drum adapter.

A fuel tank with a capacity of 8 liters, with a redone wiring - now for two carburetors, used from a walk-behind tractor.

1 - generator housing (from the Ural motorcycle);

2-rotor shaft of the generator without winding (from the Ural motorcycle);

3 - flange bearing;

4 - flange (steel);

5 - washer (steel);

6-bevel gear housing (2 ″ water pipe fitting elbow);

7-leading bevel gear (from the Druzhba-4 chainsaw reducer);

8-key (steel);

9-driven pinion shaft;

10-pinion shaft bearing (2 pcs.);

11-gear shaft bearing housing (steel);

12-pulley of V-belt transmission of forced air cooling system;

13-pulley fastening (nut with spring washer);

14-fastening the flange to the body (screws 3 pcs.)

The main gearbox is the "Muscovite". Switching is carried out by a handle, fixed on the upper fork of the front half-frame of the "breaking" hinge. Gear shifting of the "Ural" power unit is carried out with the help of the handle, located to the left of the steering wheel on the dashboard, by means of a rod.

The tractor hitch is made of strips of sheet (12 mm) steel, the length of the lower hitch links is 450 mm, the upper ones - 180 mm. The lifting and lowering of the linkage during operation is carried out using a lever located to the right of the driver's seat. The length of the lever is 550 mm, which allows you to raise and lower any mounted agricultural implement suitable for a mini-tractor without great effort.

Since the suspension of the mini-tractor is rigid, the seat is made soft. It is mounted on a support of two pairs of triangular plates, bolted together. Due to the mutual displacement of the plates, you can change the height of the seat, its distance to the steering wheel. It is also possible to adjust the backrest angle.

The engine ("gas") and the clutch are controlled using standard motorcycle cables, but not from the handles, but through the pedals located on the platform covering the "breaking" node and attached to the rear frame.

The wheels of the mini-tractor are all the same, measuring 6.15 × 13 inches, they were used from the Moskvich-412 car. From him and the hydraulic brake system, its wiring along the frame - copper pipes and flexible hoses.

The mini-tractor has approximately the same driving characteristics as its predecessor with an engine from the Izh "Planet-4" motorcycle, but the first is much more powerful and more reliable in operation. Thanks to two gearboxes (the power unit itself and from the Moskvich-412), installed one after the other, a wide selection of speed modes is obtained, the tractor has 16 forward gears and 4 backward. With both axles constantly working, the tractor began to overcome the seemingly insurmountable obstacles for it without any problems, even with a trailer and load.

It may seem to some that the construction of a mini-tractor is too heavy. The way it is. But this is more a plus than a disadvantage. Firstly, this ensures the strength of the loaded units, and secondly, it increases the adhesion of the wheels to the ground, which is important when using a mini-tractor on plowing, and even more so as a bulldozer for raking snow drifts in winter.