Agro walk-behind tractors are widely used among farmers and land owners. They help with plowing, harrowing, mowing unnecessary plants, and they can even be adapted for removing snow and transporting various loads.
These units have been produced in Ufa since 1999. The main feature is that engines for equipment are made in Russia, which significantly reduces the cost. In most cases, the Agro walk-behind tractor is equipped with a UMZ 341 engine, the repair of which is facilitated by the fact that the engine was designed right at the factory. Great reliability and good power are perfectly combined with the simplicity of the device control process. The significant weight and high pulling force provide excellent assistance in replacing manual labor with machinery.
Motoblocks will help save you time and effort
How to choose an engine
To choose a suitable engine for the Argo walk-behind tractor, you need to know the basic technical characteristics of the unit for the compatibility of the motor and other components:
- The body has a length of 180 centimeters, a width of 85, and a height of 110 cm. The ground clearance reaches 25 cm, and the rotation is carried out within a radius of 1.2 meters.
- The assembled weight of the device is about 160 kilograms.
Important! Such significant dimensions make transportation to the place of future work difficult.
- The walk-behind tractor is designed to dig 200 millimeters into the soil and transport objects weighing up to half a ton.
- The unit is capable of reaching a speed of 15 km/h.
- The engines have a single-cylinder air-cooled carburetor. The fuel is gasoline with different octane numbers (from A-76 to AI-92).
- The engine displacement is 0.3 liters and the power reaches 8 hp.
- The diameter of the single cylinder is 79 millimeters.
Choose the best engine for your walk-behind tractor.
Engines are immediately produced of good quality, since the equipment is supposed to be used in difficult conditions and heavy loads. The lubrication system has been improved. Previously, the oil was sprayed, but now a method has been developed in which the lubricant is supplied by a specially designed pump to reduce friction of the main contacting parts. Before this, the oil is cleaned in a filter.
Carburetor gx 390
Before considering how to adjust the carburetor on an Agro walk-behind tractor, you should clarify which option is installed on the walk-behind cultivator, which will allow you to analyze in more detail the process of actions that need to be performed in order to adjust
device.
Let's consider the main points regarding this device, and also version 45 for Agro
, since they are most often found when arranging a cultivator:
In this you will learn more about the GX390 carburetor:
A tuned carburetor contributes to the correct transfer of a rich mixture to the engine, however, if the element is not tuned, the power plant may not operate correctly, or may not start at all.
Engines for walk-behind tractor Agro
Motoblocks of this brand can be equipped with engines from various manufacturers, both Russian and made abroad. They should all have similar characteristics. Let's look at the most popular of them.
In this video we will look at replacing the engine of an Agro walk-behind tractor:
UMZ 341
This engine has one cylinder with four strokes. The fuel is gasoline. A carburetor is assumed to have an overhead valve arrangement. Ignition is carried out using a spark. The shaft is located horizontally relative to the engine installation, and the cylinder is at a certain angle. There is a speed controller with several modes. Main parameters:
- The cylinder volume is 333 cubic centimeters.
- Power, depending on the configuration, varies from 4 to 5.5 hp.
- Contactless ignition.
- The air is purified using a dry filter.
- Lubrication is carried out using a combination method.
- The total weight of the engine is 35 kg.
- Able to operate at temperatures from +40 to -20 degrees Celsius and relative humidity up to 98%.
This type of engine is the best for the Agro walk-behind tractor, since the price of the device starts from only 4,500 rubles.
Lifan
This is a more affordable Chinese version of engines from the Japanese company HONDA. Models of this brand are perfectly combined with Agro walk-behind tractors. LIFAN motors guarantee:
- High-quality and tested assembly.
- Reliability of all components.
- Optimal ratio of weight and dimensions with equipment.
- Long-term operation without breakdowns with proper use in accordance with the attached instructions.
- Easy to use and maintain.
The device has a power of 11 hp, a manual start system, and has a large fuel tank with a capacity of 6.5 liters of gasoline. The weight of the unit is 33 kg.
The price of Lifan engines, in relation to Agro walk-behind tractors, is about 15,000 rubles, but for this money you will get a high-quality and unpretentious assistant.
UD 2
Due to the fact that the motor has a simple design, it is widely used not only in agriculture, but also for military equipment. This device is produced at the Ulyanovsk Motor Plant. Peculiarities:
- Two cylinders.
- Crank and timing mechanism in the crankcase.
- It is assumed that the engine has a lubrication and cooling system.
- Gasoline with a low octane number is used as fuel, resulting in low performance.
- The weight of the structure is large, approximately 72 kilograms, which, with a length of 55 cm, a width of 48.5 cm and a height of 55.5 cm, significantly complicates the transportation of the product.
The cost of the motor starts from 7,000 rubles, which corresponds to the low price category.
Libright
This engine runs on gasoline. A walk-behind tractor with this device can be used not only for standard work in the fields, but also help in clearing snow, mowing unnecessary vegetation, harvesting potatoes and even transporting goods.
The engine has a power of 7 hp and a volume of 212 cubic centimeters, has 3 speeds (2 forward and 1 rear), four strokes of air-cooling.
The price of the device starts from 19,000 rubles.
Features of the walk-behind tractor carburetor
The walk-behind tractor is a massive power mini-unit with additional equipment to perform various functions. It is often powered by an internal combustion engine, less often a diesel or electronic one. A carburetor is used to ignite the fuel.
There are two main types of carburetors:
- Rotary. It is distinguished by its simplicity of structure, often found in small engines (12-15 cubic inches);
- Plunger. The multi-element design is vital for high-power walk-behind tractors.
Carburetion is carried out due to the following parts: piston, fuel tank, Venuri tube, fitting (acts as a connector), high and low speed needles.
The piston rises up, creating a vacuum. The carburetor begins to absorb air, which moves through the Venturi tube. The created vacuum allows fuel to flow from the tank into the engine through the connecting fitting. The fuel then flows around the main needle and through the inlet port into the Venturi tube.
When pressing the gas lever, the low speed needle allows access to gasoline, after which the fuel flow is controlled only by the main needle.
The necessary agricultural machinery “Neva”, “Agro”, “Ugra”, “Oka” is in demand due to its own equipment. When it comes to the carburetor of the Neva K-45 walk-behind tractor, it is a reliable device, distinguished by its quality and durability. KMB-5 is an older carburetor model in Neva units. Before purchasing, it is worth clarifying this aspect in order to purchase a truly professional assistant. The massive engines on the MTZ (Belarus-09-N) and Neva MB-2 walk-behind tractors are supported by reliable carburetors that can withstand enormous loads. The “Kadvi” MB-1, “Cascade” equipment and the “Pchelka” motor cultivator have lightweight carburetor models to optimize the functionality of the engine.
Malfunctions and their elimination
Long-term operation of the part directly depends on proper operation and running-in of the new motor, as well as on timely maintenance and proper care. But any equipment is subject to wear and tear. Let's look at the main operational problems:
- Unstable startup and malfunctions.
- Malfunctions in the chassis.
- Problems in the functioning of the gearbox. Oil may leak, change speed on its own, or, conversely, not turn on. It is better to contact knowledgeable specialists and not engage in independent repair of this complex unit in the unit.
- The clutch is not working properly.
- Violation in the lubrication and cooling system.
- The engine does not start. Let's look in more detail at the causes and solutions.
- No fuel. Just refuel the unit.
- The hole in the neck of the gas tank is clogged. Open the lid, clean it and put it back in place.
To troubleshoot problems, contact a technician for help.
- Gasoline is leaking from the carburetor. Adjust the injection system.
- The filter is clogged. It should be cleaned or replaced.
- The engine is noisy, knocks and operates jerkily. You need to adjust the valves using a feeler gauge.
- The starter starts unstably. In this case, it is better to replace the failed parts.
- The speaker circuit is faulty. This happens when a part jams. To avoid further damage to the clutch, it is better to replace it in time.
Adjusting the walk-behind tractor carburetor
A situation may arise in which the engine runs unstable. In this case, you need to adjust the carburetor
on
a walk-behind tractor .
You should start setting up in early spring (after a long period of inactivity of the unit) or late autumn (after huge loads).
It is better to do all repair work in a free and well-lit space. To set up a carburetor with your own hands, you will need a minimum of time and effort. Procedure:
- the engine warms up for 5 minutes;
- the low and high throttle screws are screwed in until they stop;
- adjust
the screws by a maximum of 1.5 turns; - set the gear lever to low speed;
- using the throttle adjustment screw, achieve low speeds when the engine runs “without failures”;
- using the idle screw, adjust the idle speed to maximum until the engine runs continuously;
- the engine must be running during all manipulations. Only at the end it must be turned off and turned on again for control.
If you check your actions with the annotation, you can really avoid mistakes in repairs. After adjustment, the engine should run silently and without failures.
Other malfunctions may also appear. If fuel does not enter the cylinder, you must first check the amount of fuel in the gas tank. The next step is to check the flow of fuel to the carburetor. It is worth removing the hose from the inlet fitting. It will almost always be necessary to clean the carburetor of a walk-behind tractor - remove blockages from the mechanical cleaner filter.
READ Carburetor Trimmer Cleaner
Owners of walk-behind tractors should familiarize themselves in detail with the specific operation of the carburetor, as well as methods for eliminating breakdowns. The proposed will help to deal with the problem that has arisen.
Unstable speed
The main complaint of owners about the operation of the device is the instability of engine speed, as a result of which it begins to sneeze.
The cause of the malfunction may be the establishment of a large gap in the gearbox cover, which should be adjusted to values from 0.2 to 0.5 millimeters.
In this case, power may decrease, which is a consequence of contamination of the carburetor, fuel pump hose or air exhaust filter, as well as crankcase failure and carbon deposits in the fuel combustion chamber. You just need to inspect and clean all the components. This is interesting: video repair of a Cascade walk-behind tractor with your own hands.
How to adjust the carburetor of a walk-behind tractor with your own hands: device diagram, K-45,
Adjustment of the walk-behind tractor carburetor should be carried out from time to time in order for the mechanism to function properly. A likely cause of changes in the operation of the walk-behind tractor engine may be the carburetor. To do this, the device is disassembled, cleaned and adjusted (adjusted). Regardless of the brand of carburetor and the device on which it is installed, the principle of regulation is the same for everyone. The difference can only be in the number of revolutions.
