How to Adjust the Belts on a Moto-Block Brait

The relationship between the engine and the valves

A single-axle tractor is a complex agricultural unit, which includes the following units:

Engine. the power mechanism of a power block. There are different types of motors:

The manufacturers have recently been producing 4-stroke engines with high technical indicators.

Large units are equipped with diesel engines, small and medium. with gasoline engines, which are widely spread among farmers, with the power of 4-9 liters.с.

Internal combustion engine. the main device in which the process of converting the thermal energy of fuel combustion into mechanical.

The energy transformation process takes place in 4 steps:

Fuel is fed to the combustion chamber through the inlet distributor. The valve elements close and the piston moves upward, compressing the combustion mixture. When spark plugs are turned on, the discharge ignites the combustible material. When the temperature rises, the mixture expands, pushing the piston down. Conversion of thermal energy into mechanical energy. When the valves open, the gases escape into the exhaust system.

Intake and exhaust valve clearances can change after a certain period of operation due to heavy loads.

The reason is wear and tear and amortization of the components. Small clearance changes gas distribution phases. Engine does not operate at its nameplate capacity. If the gap is too large, mechanical oscillation occurs, resulting in distortion. When the valves are opened for a short time, the cylinder does not fill completely. This leads to malfunctions and failure of the engine, reduction of performance.

adjust, brait

Adjusting the valves on your power tiller is a mandatory maintenance procedure.

According to the technical regulations it must be done once a year. If the machine malfunctions, you can adjust the valves twice a year.

On the example of the engine of the Chinese company LIFAN, let’s consider a number of problems, in the case of which it is also desirable to adjust the valves on the motorblade Lifan 6,5 hp:

  • if there is a “kickback” on the starter handle when starting the engine;
  • if a distinct knocking sound is heard in the cylinder head when the engine is running;
  • when the engine is faltering, throttling and difficult to start while hot and fails to start until it cools down;
  • when you hear popping noises in the muffler and the single axle tractor loses power.

Air filter maintenance

Many power tillers and not only, use an air filter in the form of a foam sponge. Here’s how.

Air filter

As you can see under the cover of the air filter housing, there is already dusty foam. Periodically, it must be cleaned, foam rubber is removed and washed with hands in warm soapy water. Then it must be dried, and now most importantly, it must be soaked in machine oil, it should be in oil, not dry. This way you protect the engine from getting dust in it.

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Well here, on this for now and all, not so great discoveries, but maybe someone will be useful. If you have any of their chips, you can share them in the Комментарии и мнения владельцев. Thanks!

The main faults of power tillers

The diesel and gasoline engines have different motor resources. For the first normal figure is 4000 m / h, but the latter can provide only 1500 m / h. Despite this, diesel models of power tillers are not in high demand. In fact at the purchase, and in the process of operation they cost much more. So you most likely work with a power tiller, equipped with a gasoline (carburetor) engine.

All the breakdowns that can occur during the operation of agricultural machinery, can be divided into two

  • Engine failures:
  • problems with starting;
  • malfunctions.
  • Faults in the rest of the assemblies and mechanisms:
  • clutch malfunction;
  • Breakdowns in the gearbox;
  • problems with the undercarriage;
  • Malfunctions of control and automatics;
  • the machine’s systems faults (cooling, lubrication, etc.).).

In many respects, the success of repair of suddenly malfunctioning machine depends on the correct diagnostics. And when it comes to maintenance, this is precisely to spot any minor malfunctions that can later lead to serious ones.

If you do not have the necessary knowledge, space, tools and materials for maintenance and repair of the engine, leave the work to a specialist!

Вся правда о мотоблоках Brait. Детальный разбор!

Brait power tillers overview

These are high-performance machines that are designed to handle medium- to large-sized plots of land. Owners of these machines have the opportunity to automate a wide range of works thanks to aggregate attachments. In terms of its technical characteristics and performance, the machine is comparable to a leading European quality power tillers.

Brait devices are distinguished by their small overall dimensions and improved maneuverability. Because of this, power tillers are used in gardens, cottages, farms and urban.

The manufacturer offers several variants of motor blocks, which differ in the type of engine and its power.

Picture of the Brait power tiller is shown below.

The relationship between the engine and the valves

A single-axle tractor is a complex agricultural unit, which includes the following nodes:

Engine. the power mechanism of the power block. There are different types of engines:

Factory manufacturers have recently been producing 4-stroke motors with high technical indicators.

On large units are installed diesel, on small and medium. gasoline engines, widespread among farmers, with a capacity of 4-9 liters.с.

Internal combustion engine. the main device in which the process of converting thermal energy of fuel combustion into mechanical energy is performed.

The energy transformation process is carried out in 4 stages:

Fuel material enters the combustion chamber through the inlet distributor. The valve elements close and the piston moves upward, compressing the mixture. When spark plugs are turned on, the discharge ignites the combustible material. As the temperature rises, the mixture expands, pushing the piston down. Heat energy is converted into mechanical energy. When the valves open, the gases are exhausted into the exhaust system.

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After a certain period of operation, the intake and exhaust valve clearances may change due to heavy loads.

Causes elements to wear and depreciate. Small clearance changes the phases of the gas distribution. The motor does not work with the declared power. When the gap is large, mechanical vibrations occur, resulting in deformations. The cylinder is not filled completely because of the short-term opening of the valves. This leads to malfunctions and failures in operation, reduction of efficiency.

Adjustment of the valves of the motor-block. a mandatory procedure in the conduct of maintenance.

According to the technical regulations, it should be done once a year. You can have the valves adjusted twice a year in the event of machine malfunction.

On the example of the engine of the Chinese company LIFAN consider a number of problems, at the occurrence of which it is also desirable to adjust the valves on power tiller Lifan 6,5 hp:

  • If there is a “kickback” on the starter handle when starting the motor;
  • If you can hear a distinct knocking noise in the cylinder head when the engine is running;
  • If the engine began to work with interruptions, throttle and hard to start “hot”, starting properly only after cooling;
  • if you hear a popping noise in the muffler and the single axle tractor loses power.

How to adjust the valves of your power harvester yourself

It is impossible to imagine a small farm without agricultural machinery, but if farmers can still afford a tractor, the private farmers are not able to afford expensive equipment. And it hardly makes sense to buy it for working several hectares of land. Another thing is miniature power tillers, which can be quite a full-fledged replacement for tractors. They can be used for almost the entire range of agricultural work, including plowing, tilling, cultivating, harvesting, fighting weeds, and even shoveling snow. If you have a trailer, such a mini-tractor can be used for transporting crops to the place of residence.

a single-axle tractor is a self-propelled semiautomatic machine, controlled with the help of handles and driven in front of the operator. Despite its small size, a single-axle tractor is a rather complicated machine that requires regular care and maintenance. Valve adjustment is one of the most frequently required maintenance tasks for single axle tractors. Despite the differences in the design of engines, this procedure is performed according to a certain algorithm, the same for all makes and models. In this article we will consider the peculiarities of clearance adjustment in the valves of motor blocks from different manufacturers.

How to clean a carburetor?

Before disassembling the metering unit completely clean it from the outside and drain the fuel residue from the gas tank. Then proceed to the removal of the system. First remove the air filter and supply pipe. Next, you need to disconnect the throttle actuator and take out the carburetor. Maintenance of the dosing unit involves four steps:

  • Cleaning the cup in the sump filter from oil deposits.
  • Removing the float from the float chamber. To do this, unscrew the fuel nozzle and remove the bushing under it. Remove the float and needle assembly before removing it.
  • Soaking the carburetor body and jets in acetone or white spirit. wash plastic parts in gasoline and then clean them with a soft brush or rag.
  • Cleaning the dispensing orifice. A thin needle or wire is used for this.
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Experience of owners of a Neva MB-2 power tiller. reviews from forums

Every farmer’s experience is unique. Especially valuable are the tips of those who use the same single-axle tractor as you do at your land plot. Next. some tips from the owners of the Neva MB-2 power tiller about maintenance and troubleshooting.

“I bought a Neva mb2 single-axle tractor and was very satisfied. The machine worked fine for the first time, but a week after starting to use it, white smoke came out of the exhaust. Tried to reduce the engine speed. did not help. Turned out to be water in the float chamber. I drained the gasoline, put it on ice, and emptied the chamber. After that the single-axle tractor worked fine. If anyone had a similar problem, I advise to use my experience!”

“I faced this problem: my single-axle tractor was cultivating normally in first gear, but when I shifted to second gear and worked with the soil, the engine speed wouldn’t drop. When digging into the ground, the cutters stopped. “I am not new to working with power tillers, it’s been 4 years now and a lot of people told me it could be the towing of the belt. I adjusted the tensioner and shortened the chain on the clutch lever and the problem is gone! Now I work with pleasure, I’ve been using my Neva MB2 for two years now”.

“I’m no novice with this tiller, I’ve been using it for 4 years now. Recently, if you give the load, the engine began to stall, well, as if not pull Barely drove into the garage, and there was no noise or smoke. The problem was simple: a clogged air filter. I had to replace it and now the machine runs like a beast.”.

You can also help other readers of our site their feedback on this model of motor-block and its maintenance and major faults.

If you are an owner of this model of power tiller, you can leave your feedback about its maintenance and operation, or ask any interesting question about breakage or maintenance of this model in the Комментарии и мнения владельцев section below.

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