Today, one can observe the fruits of technological progress not only in the industrial, but also in the agricultural sphere. A large number of equipment is used for a variety of purposes: this is soil cultivation, and sowing crops, and just caring for the vegetation on the site. Among the variety of agricultural transport, one should distinguish such a device as a walk-behind tractor, which is simply indispensable in everyday life.
This device is a design with one or two wheels located on the same axis. Often such a mechanism is used for tillage when the operator controls it with the help of handles with all the necessary control devices, but sometimes it is also used as an elementary means of transportation.
About what this transport consists of, as well as about the features of such a procedure as repairing
walk-behind tractors with your own hands, we will discuss further. To understand all the intricacies of the operation of this device, you should consider in more detail what is included in its design.
What is a walk-behind tractor made of?
The main driving part of this mechanism is an engine running on both gasoline and diesel fuel. This motoblock element can be push-pull or four-stroke. A feature of such motors is that they have special speed controllers that simplify the work process. Engine power varies from 5 to 10 hp. It is worth noting that the most difficult is the repair of the walk-behind tractor in this part of it.
Another structural element is the transmission, which has several varieties:
- gear;
- gear-worm;
- belt-gear-chain;
- hydrostatic.
An important part of the walk-behind tractor is also the aggregation system, which is responsible for the possibility of connecting additional agricultural devices to the apparatus.
The control of this device can be displayed either on its handles or on the steering rods. This is where the clutch and gas are controlled. Some heavy specimens can sometimes be equipped with a brake.
Principle of operation
The functioning of this apparatus is carried out thanks to the engine, due to which the walk-behind tractor moves and transfers energy to additional elements installed on it. Its main structural detail is a rotary cutter, whose main role is to remove weeds, plowing and equipping the land with fertilizer. Very often, the repair of the walk-behind tractor is carried out precisely in this part of it, since it is under heavy load.
Heavy machinery can sometimes be based on attachments, so the functionality of the device is greatly expanded.
In addition to the soil milling cutter, the construction of the walk-behind tractor can also include such details as a cultivator, a plow, a mower, an okuchnik, etc.
Varieties of motoblocks
Depending on the weight, 3 main types of these agricultural machines can be distinguished. It is important to note that any repair of walk-behind blocks with your own hands should be carried out strictly in accordance with the technical features of a particular model. Types of such equipment are as follows:
- Light type. Its weight ranges from 10 to 50 kg. Due to its mobility, its speed is significantly higher than that of other devices, however, due to its low power, it can be used to process only small sections of soil.
- The average type of motoblocks is represented by products with a weight of 60 to 100 kg. Such devices are used for a variety of purposes.
- A more professional variety of this agricultural machinery is heavy professional devices. Due to the fact that their weight exceeds the figure of 100 kg, they are not able to work very quickly, but with their help it is possible to process a large plot of land due to the high power of these samples.
Next, you should consider in more detail what kind of malfunctions can arise during the operation of such devices and, as a result, what will determine the implementation of such a procedure as repair of a walk-behind tractor.
The main causes of a malfunction of a gasoline engine
As a rule, all breakdowns of this kind can be divided into 2 categories:
- Problems starting the engine.
- Malfunctions in work.
In the event of such problems, do not immediately give the device into the hands of employees of the service station. It is possible that the repair of the engine of a gas- powered motoblock can be done by hand. The causes of a motor malfunction may include the following:
- ignition is not turned on;
- there is no fuel in the fuel tank;
- the fuel supply tap is closed;
- The carburetor damper is not positioned correctly. When starting the engine, it must be closed.
External indicators of the unstable operation of the walk-behind tractor - low revs, self shutdown, power attenuation. This can be caused by a number of reasons:
- the air filter is clogged (the reason is a lack of air in the carburetor);
- low quality fuel;
- malfunctions of the ignition mechanism;
- muffler clogging;
- incorrectly performed carburetor system adjustment;
- the elements of the cylinders and pistons are subject to wear.
Faults and repair of the diesel engine of the walk-behind tractor
Often, it is possible to diagnose and eliminate equipment operation problems independently. Next, some of the most popular failure situations and methods for solving them will be described. Do-it-yourself repair of walk-behind tractors should be done as follows:
- If the clutch slips in the diesel device , it is recommended to check the mechanism for worn discs and springs. The cause may also be a problem with the tension of the functional parts of the transmission system.
- Sometimes the clutch is not fully disengaged. To fix this, while repairing the walk-behind tractor, you can check how firmly the control cable is pulled.
- If extraneous noise arises in the gearbox, make sure that the gearbox oil is in the right amount. Perhaps the problem is the deterioration of the bearings or gears (in which case they will have to be replaced).
- If the speeds switch poorly, then you should also make sure how well all the functional elements of the gearbox work. Very often you can increase their service life by simply cleaning and grinding.
It is worth saying that today there is a wide variety of motoblocks, and each of the samples requires a certain approach. Correcting certain breakdowns is possible only by carefully studying all the technical characteristics of the device. This may be foreign equipment or, for example, the popular
centaur diesel
motoblock. Repair of both models should be performed only after a detailed analysis of their design and principle of operation. But do not forget that proper care of any equipment will definitely increase its service life and will significantly reduce the cost of its operation.