Today you can observe the fruits of technological progress not only in the industrial, but also in the agricultural sector. A large number of equipment is used for a variety of purposes: it is tillage, and sowing crops, and simply caring for vegetation on the site. Among the variety of agricultural vehicles, one should single out 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 axle. Often such a mechanism is used for tillage, when the operator controls it with handles with all the necessary controls, but sometimes it is also used as an elementary means of transportation.
What this transport consists of, as well as the features of such a procedure as do-it-yourself motoblock repair, will be discussed 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 does a walk-behind tractor consist of?
The main driving part of this mechanism is an engine that runs on both gasoline and diesel fuel. This element of the walk-behind tractor can be two-stroke orfour-stroke. A feature of such motors is that they have built-in special speed controllers that simplify the work process. Engine power varies from 5 to 10 hp. It is worth noting that the greatest difficulty is the repair of the walk-behind tractor in this part of it.
Another structural element is the transmission, which has several varieties:
- notched;
- 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 attaching additional agricultural implements to the machine.
The control of this device can be displayed either on its handles or on the steering rods. This is where the clutch and throttle are controlled. Some heavy models may sometimes be equipped with a brake.
Working principle
The operation of this device is carried out due to the force of the engine, due to which the walk-behind tractor moves and transfers energy to the additional elements installed on it. Its main structural detail is the rototiller, whose main role is to remove weeds, plow and equip the land with fertilizer. Very often, the repair of the walk-behind tractor is carried out in this part of it, since it is under heavy loads.
Heavy mechanisms can sometimes be based on attachments, due to which the functionality of the device is greatly expanded.
Except the rototiller in constructionmotoblock may also include parts such as a cultivator, plow, mower, hiller, etc.
Varieties of walk-behind tractors
Depending on the weight, 3 main types of these agricultural machines can be distinguished. It is important to note that any do-it-yourself repair of walk-behind tractors must be carried out strictly in accordance with the technical features of a particular sample. The types of such equipment are as follows:
- Light type. Its weight ranges from 10 to 50 kg. Due to its mobility, its speed is much higher than that of other devices, however, due to its low power, it can only work small areas of soil.
- The average type of motoblocks is represented by products weighing from 60 to 100 kg. Such devices are used for a variety of purposes.
- A more professional variety of this agricultural equipment is heavy professional devices. Due to the fact that their weight exceeds 100 kg, they are not able to work very quickly, but they can work a large area of land due to the high power of these samples.
Next, we should consider in more detail what malfunctions may occur during the operation of such devices and, as a result, what the performance of such a procedure as the repair of a walk-behind tractor will depend on.
Main causes of gasoline engine failure
As a rule, all breakdowns of this kind can be divided into 2 categories:
- Problems starting the engine.
- Problems in operation.
WhenIn the event of such problems, do not immediately hand over the device to the workers of the service station. It is quite possible that it is quite possible to repair a gasoline-powered walk-behind tractor engine with your own hands. The causes of motor failure may be the following:
- ignition off;
- no fuel in fuel tank;
- fuel supply valve closed;
- the carburetor flap is not positioned correctly. It must be closed when starting the engine.
External indicators of the unstable operation of the walk-behind tractor - low speed, self-shutdown, weakening of power. This can be caused by a number of reasons:
- the air filter is clogged (the reason is the lack of air in the carburetor);
- poor quality fuel;
- malfunction of the ignition mechanism;
- muffler blockage;
- incorrect adjustment of the carburetor system;
- the elements of the cylinders and pistons have been worn out.
Faults and repair of diesel engine motoblock
It is often possible to diagnose and fix equipment problems on your own. Some of the most common breakdown situations and how to solve them will be described below. Do-it-yourself repair of walk-behind tractors should be done as follows:
- If the clutch slips in a diesel device, it is recommended to check the mechanism for worn discs and springs. It could also be a tension problem.functional parts of the transmission system.
- Sometimes the clutch doesn't fully disengage. To fix this, when repairing the walk-behind tractor, you can check how firmly the control cable is pulled.
- If extraneous noise occurs in the gearbox, you need to make sure that the oil in the gearbox is in the right amount. The problem may be bearings or gears that are worn out (in which case they will need to be replaced).
- If the gears are shifting badly, then you should also make sure that all the functional elements of the gearbox work well. Very often, a simple cleaning and sanding can improve their lifespan.
It is worth saying that today there is a wide variety of walk-behind tractors, and each of the samples requires a certain approach. It is possible to correct certain breakdowns only by carefully studying all the technical characteristics of the device. This may be foreign equipment or, for example, the popular Centaur diesel walk-behind tractor. Repair of both models should be carried out 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.
