The most maneuverable and easy-to-use tractor is considered to be a home-made fracture tractor, consisting of two semi-frames. It is more difficult to assemble such equipment than with a solid frame. This will require complex drawings and additional parts.
What is a fracture tractor
In terms of design and dimensions, the fracture is nothing more than an ordinary mini-tractor. Usually, this technique is produced on the basis of a walk-behind tractor. There is a home-made tractor with a factory-made break frame or assembled at home from old spare parts. There is also a third variant of fracture. The unit is assembled from a walk-behind tractor, and spare parts are used from a special conversion kit for sale.
In terms of performance and a number of characteristics, a home-made tractor is inferior to a factory-made break. But the homemade product also has its advantages:
- Competently assembled equipment in functionality is capable of surpassing powerful factory mini-tractors, and the cost of a home-made unit is many times less.
- The functionality of the fracture tractor can be significantly expanded to suit your requirements. Craftsmen adapt those mechanisms to the technique that help to perform the necessary work.
- The costs incurred during the self-assembly of the tractor will pay off in 1 year. And if there are many spare parts from old equipment at home, then the unit will cost the owner almost free.
The disadvantage of a homemade tractor can be considered the lack of the necessary spare parts. If you have to buy all of them, then there will be no savings. Then it is better to immediately purchase a factory-made mini-tractor.
Fracture assembly technology
Before you start making 4x4 fractures, you need to draw accurate drawings of all the nodes and the frame. It is difficult to do it on your own. It is better to contact a specialist or search the Internet. Although, the second option is not very successful, since there is no guarantee that the diagram was drawn correctly.
Attention! It is impossible to independently develop drawings of fractures without having experience in this matter. Mistakes in the components will lead to a quick breakdown of the tractor or there will be difficulties in control.
So, the break 4x4 is a mini-tractor with a four-wheel drive, the frame of which consists of two parts, connected by a hinge mechanism. The motor is usually installed at the front. The frame itself is welded from the channel. It consists of the following elements:
- traverses - front and rear elements of semi-frames;
- spars - side elements.
For the manufacture of semi-frames, it is advisable to find channel No. 9 - 16. In extreme cases, No. 5 will go, but such a structure will have to be reinforced with transverse beams. The semi-frames are interconnected by a hinge mechanism. Optimally for these purposes, gimbals from a GAZ-52 or GAZ-53 car are suitable.
A self-made 4x4 fracture tractor folded with your own hands is better equipped with a four-stroke gasoline engine or diesel engine.
Attention! Optimum engine power for homemade breaking is 40 horsepower.
The motor can be taken from a Zhiguli or Moskvich. When using the M-67 engine, it is necessary to increase the transmission ratio. In addition, efficient cooling needs to be done. Otherwise, the motor will overheat, which will affect the loss of power and rapid wear of parts.
Installation of working units for fracture
For the tractor transmission, it is advisable to get a PTO, a clutch and a gearbox from a domestic GAZ-53 truck. In order to connect these nodes to the motor, they will have to be modernized. For example, to dock the clutch with the engine, you will have to make a new basket. It must fit in size and fit. The back of the flywheel is shortened on a lathe, plus a new hole is drilled in the center.
The front axle is simply rearranged from another technique. There is no point in changing its design. But the rear axle will also have to be slightly modernized. This unit is similarly removed from another car, but the axle shafts are shortened before installation. Attach the rear axle to the frame with four ladders.
The choice of wheel size depends on what kind of work the tractor has to carry out. To prevent the equipment from digging into the ground, it is optimal to install wheels with a radius of at least 14 inches on the front axle. In general, if the tractor is only needed for transporting goods, then wheels with a radius of 13 to 16 inches will do. For extensive agricultural work, it is advisable to select wheels with a large radius - from 18 to 24 inches.
Attention! If it was possible to find a wheelbase of only a large radius, then for ease of control of the tractor, you need to install a power steering.
The hydraulic cylinders of the control system cannot be made independently. They are removed only from old decommissioned equipment. To maintain the operating pressure and oil circulation, a gear pump is installed. At a fracture, it is desirable that the gearbox is connected to the wheels of the main shaft and controls them.
The driver's seat will fit from a passenger car. The chair is soft, comfortable, plus there is a mechanism for adjusting the backrest tilt. The height of the steering wheel is made comfortable for the operator. The driver should not cling to him with his knees.
Important! All control levers in the tractor are freely accessible.
A break in plowing, assembled from old spare parts, should produce about 2 thousand revolutions. The minimum speed is 3 km / h. These parameters are achieved by adjusting the transmission.
In such a tractor design, it is good to install a separate gearbox and a four-section hydraulic valve on each drive wheel. Then there is no need to install the cardan and the rear axle differential.
The video shows a 4x4 fracture option:
A homemade tractor is easy to maintain, since the owner knows what he has installed and where. Load the unit only after complete running-in.