Alteration of the motor-block in a minitractor

For agricultural work on relatively small plots of land, the best option is a mini tractor. As a rule, the factory version costs a lot of money, but you can make a minitractor based on the motoblock much cheaper. It is important to understand that the most necessary element of a homemade tractor is a walk-behind tractor, and it must meet certain requirements. How to choose a suitable model, it will be discussed below.

Choosing a walk-behind tractor

In order for the minitractor to perform the tasks assigned to it with high quality, it is necessary to choose the right walk tractor. Pay attention to the following parameters.

1. Power - there is a direct dependence on the area that must be processed.The larger it is, the device should be more powerful. For a plot of up to 60 acres, a motoblock with a 4 hp engine power is enough. For processing 1 hectare suitable option 6-7 hp From 2 to 4 hectares of land the best choice is 8-9 hp.
2. Fuel. It is best to choose models on diesel. As practice shows, such devices do a better job with a large amount of work, and they also use fuel more economically.
3. Weight. Devices with low weight have better handling than heavier models. However, this condition is important if the technique will be used for its intended purpose. If buying a tiller means converting it to a tractor, then a heavier model should be taken, since a light tiller can not cope with hard ground.
4. Price. Considering the fact that a homemade tractor is primarily a desire to save, buy a foreign walk-behind tractor or an expensive advertised model is not worth it. Best suited to domestic models - Agro, Neva, MTZ, Centaur and Bison. Their additional advantage in addition to the price is the availability of parts and the ability to carry out repairs on their own.
5. Equipment. Many tillers on the market are sold with a large number of accessories, sometimes their cost may exceed the price of the device itself. If most of them are not needed, then it is better to overpay for a more powerful engine.
6. Functionality. The motorblock, from which it is planned to manufacture the tractor, should ideally have the following functions: steering adjustment, forced engine stop in an emergency, electric starter.

Kit for reworking the motoblock into a tractor

To any of the above motor-blocks, you can separately buy a kit for reworking it in a mini-tractor. Many manufacturers predict the desire of users to remake the walk-behind tractor into a tractor and sell a set of spare parts for this purpose. Its value can reach 350-400 dollarsbut it is worth the money.

The kit for modifying the motoblock into a minitractor includes a frame for mounting the engine, seat, control system, rear suspension with a lifting mechanism, a front axle with brakes and wheel hubs. As a rule, all parts are made of metal and have good quality.To assemble a tractor from a ready-made kit, use the attached diagram.

However, you can do without the purchase of the finished set. To make a mini tractor from the motoblock with your own hands, in addition to the base in the form of the motoblock itself, you need other components and tools.

It is important to understand that not all the structural elements will turn out to be made by yourself, in any case, you will have to buy something.

Independent production of a minitractor

No matter which path you choose to build, you will need row of tools:

• welding machine;
• drill and drill set for her;
• screwdriver and keys
• Bulgarian with disks;
• spare parts for fasteners.

Frame

Before you start collecting the tractor, you should prepare a good drawing. You can make it yourself, but then you need not just a beautiful picture, but a well thought-out scheme with calculations, based on the existing basis and tasks that should be performed.

The supporting structure when reworking the motoblock into a minitractor needs some work, as it is necessary additionally install two more wheels. For its manufacture will require a metal profile or pipe.The cross-section of the pipe, as well as the thickness of the walls, do not play a special role, but it is obvious that they should not be too thin.

In general, in this case the rule “the heavier the better” works. Weight enhances the grip of technology with the surface, and during plowing it is especially important.

It is possible to fasten the frame elements by welding or by means of bolts and nuts, you can also use a combined assembly. To enhance the frame, you can use an additional cross beam, which will act as a stiffener and make the structure more robust.

At the stage of assembly of the frame, you can take care of manufacturing attachmentsIt can be located in front or behind. If the self-made mini-tractor, among other things, is assigned the task of moving small trailers, then the rear hitch should be attached.

Chassis

For the front wheels of the minitractor with the engine from the motoblock you can purchase ready-made hubs. In order to secure the front pair, you must take a pipe with a front axle width. Wheel hubs are attached to it. Next, drill a hole in the center and attach the pipe to the frame.Steering rods are mounted to the frame with a worm gear to provide the ability to control the rotation of the wheels. When the gearbox is fixed, you can install the steering wheel.

To install the rear axle will need bushing with bearings. A pulley is placed on it so that the torque from the motor is transmitted to the axle. For the rear wheels, you can use the wheels from a passenger car, or apply those that were bundled with a walk-behind tractor.

Engine

Most often the engine is installed in front of the frame - this is done in order to balance the design when working with a trailer or other equipment. The engine is mounted using a mounting system, and it is best to make it mobile. The reason for this is the belt mounting method of the rear axle with the engine. To ensure the convenience of belt tension and to simplify this process, it is better to leave the engine moving.

Optional equipment

The necessary elements for the collection of the main structure are listed above. After its assembly, the brake and hydraulic system are connected. If the technique will be used on the track or in the dark, it will not be superfluous install headlights as well as parking lights. The presence of a sun visor or plating is a personal matter for everyone: they will not give significant advantages at work.

A quick way to make a mini tractor

The trailer adapter is an addition to the motoblock, it simply joins the main device, and a mini-tractor is obtained. For the production of homemade will need a design from a uniaxial frame. As a suspension, you can use spare parts for motorcycle strollers. The axle is best made from a 4x4 cm steel angle. Wheel bushings are welded to this corner. It is important to correctly calculate their location and ensure the reliability of fastening. After that wheels are put on.

The next stage of production - mounting system. To do this, you need to put the tiller next to the axle and measure the distance over which to cut the pipe. For greater reliability, an additional frame is welded at the mounting location with a size of no more than 30 * 30 cm.

Conclusion

Assembling a mini-tractor with your own hands through reworking a walk-behind tractor is not such a hard task. When using a ready-made kit, it becomes even easier, but you can save money and do everything yourself. On the Internet you can find a large number of videos on this topic, and below is one of them: