DIY motoblock belt tensioner

Service

Timely service helps to keep the equipment in maximum functional condition. To eliminate breakdowns of the Mole cultivator, instructions will help.

Unit maintenance procedure:

  • cleaning the cylinder head. The part is washed and dried;
  • carbon deposits are removed from the cylinder;
  • the channels, as well as the muffler and carburetor, are cleaned with fuel;
  • the crankcase oil seal should be replaced after complete disassembly of the gearbox;
  • a cloth soaked in gasoline removes carbon deposits from the muffler.

Following these procedures will keep the unit in working order for many years.

Description

The “Mole” motor-cultivator appeared in the early 80s of the last century and immediately gained popularity among rural residents and owners of summer cottages. This is not surprising, because with the help of this agricultural technique, mechanized soil cultivation, as well as planting, care and harvesting, became possible.

For more than 30 years of its existence, “Mole” has been modified more than once. Its parts such as the engine, gearbox, handles, cutters, as well as other equipment (including attachments) were perfected. Having gone through the difficult path of improvements, we no longer received the original motor-cultivator, which has some limitations in its work, but a multifunctional motorized device with which you can easily perform the following field work:

  • plowing the soil;
  • cutting of beds;
  • planting potatoes;
  • hilling plants;
  • weeding of plants from weeds;
  • mechanized harvesting of potatoes;
  • mowing;
  • irrigation;
  • transportation of bulk and piece cargo;
  • snow removal.

In order to complete all the listed work, it is necessary to acquire the appropriate tools. You can find out in more detail in the article about attachments for the Krot motor-cultivator on our website.

No matter how powerful your unit is, no matter how you care for it, sometimes it still requires repair. the engine does not start, the engine heats up or some other malfunction. To know how to repair a cultivator, you need to understand its structure.

Engine

The first samples of Krot cultivators had many complaints precisely from the motors, which were notable for their unreliability and low motor resource. The owners of the equipment, at their own peril and risk, converted agricultural machines. Often, new engines were installed on the units, instead of relatives that had fallen into disrepair, from other garden equipment: Forza, Patriot, Sadko, Lifan.

Thanks to the factory design developments, cultivator models appeared with motors Honda GX 120, Honda GC 135, Greenfield, GeoTeck, Subaru Robin EY-15D, Hammerman, INNOMOTOR, BriggsStratton from well-known Japanese, German, American, Hungarian, Italian brands.

Thanks to modern engines, innovative developments, from the once narrowly functional milling cultivator, the Mole has turned into a universal agricultural machine, which is capable of performing any agrotechnical work on soil cultivation, cultivation of crops, as well as transportation of goods, clearing the territory.

Therefore, if your Mole cultivator still has an old two-stroke engine, urgently change it to a new model and boldly expand the functionality of the unit. The most budgetary and fairly reliable option is Lifan, “Americans” and “Japanese” will be more expensive, but later on they will require much less attention.

Does not start

So, what to do if the “Mole” does not start, what may be the reasons. Junk, or there is no ignition at all in the following cases:

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Carburetor

Correct adjustment of the carburetor determines the consistency of processes when starting the engine and its further operation. The main function of the carburetor is to create a fuel-air mixture, which, after ignition, drives the heart of the cultivator. the motor. Therefore, it is extremely important to adjust it in accordance with the recommendations of the factory instructions. The carburetor needs adjustment after the first season of operation.

The adjustment consists in setting a consistent fuel supply and the required speed. The screws for the number of revolutions and the quality of the fuel make the necessary adjustment of the carburetor in idle mode. In addition, it is important to keep the carburetor clean at all times.

Another reason that the Mole cultivator does not start, especially after long downtime, may be the appearance of condensation in the carburetor due to temperature changes. In this case, you will have to completely disassemble and clean the carburetor. Due to low-quality fuel, the carburetor may also not work efficiently.

Carburetor

What is a carburetor and what is it for adjusting? A carburetor is a small device designed for the production of a fuel-air mixture. This mixture with the help of a piston and a spark plug will be compressed and ignited as much as possible, the engine will start and further work.

Carburetor adjustment must be carried out after the first working season.

Carburettor adjustment is one of the mandatory items included in the “maintenance” section of the unit. Thanks to timely inspection and repair, the operating life of the cultivator will increase. In addition, inspection and adjustment is necessary even when the engine roared violently for no apparent reason.

Before proceeding with the adjustment, it is necessary to familiarize ourselves with the device of the carburetor of the “Mole” cultivator:

So, to debug the fuel supply and ensure the required speed, you need to turn to two screws: the number of revolutions (in the figure) and the quality of the fuel (figure). With the help of these two screws, we adjust the fuel supply to the carburetor of the “Krot” motor-cultivator at idle speed. It is necessary to act very carefully, you should first check the state of the ignition.

Important! Thoroughly clean the carburetor where necessary. clean, wash where necessary. change parts. Then the Mole cultivator will serve you for a very long time.

The owners of the machine are often interested in how to start the Mole cultivator after winter. The reason for the lack of ignition is condensation in the carburetor that has accumulated during idle times at changing temperatures. Complete disassembly of the device with its further cleaning will help to solve this problem. All kinds of additives present in low-quality fuel and dust seeping through the filter will also not contribute to the operation of the device.

DIY v-belt tensioner pulley

Modernization of the KROT motor-cultivator

In Russia, the “Mole” type motor-cultivators have been produced for a long time. The first model of the MK-1 “Krot” motor-cultivator was manufactured as a single-purpose machine for soil cultivation. To date, the technical capabilities of motor-cultivators have been significantly expanded and even mini-feed preparation equipment has been developed for them. Externally, motor-cultivators resemble walk-behind tractors and the main structural units of both are the same.

2 DIY repair of motor cultivators

The most affordable and popular models preferred by summer residents and farmers are: motoblock MB, MB 1, Agro, Mole, Zirka and Zubr. Repair of the Zubr walk-behind tractor, like all the other listed models, can be easily done with your own hands by replacing certain structural elements by buying them (including the old model) at specialized disassembly.

However, we will look at the most common technologies for self-diagnosis and troubleshooting of key elements in their design.
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2.2 Overhaul of the walk-behind tractor

Motoblock: possible breakdowns and how to fix them

If you actively use small-sized agricultural machinery, like walk-behind tractors, you probably encountered some problems in their operation. One of the most common questions among owners of this type of equipment. “Why the walk-behind tractor stalls?”.

In the overwhelming majority of cases, this is due to engine malfunctions, which can be easily eliminated on your own, without contacting specialized workshops.

1.1 Types of motor-block engine breakdowns and methods of their diagnosis

Since the engine is the main element in the design of the walk-behind tractor, the largest number of faults are associated with it. The first signs of engine malfunction are reduced performance indicators.

If the engine does not work well, we recommend checking:

  • whether it is warmed up enough, especially in the cold season;
  • air filter contamination level;
  • the quality of the fuel used;
  • the correctness of the ignition system;
  • the presence of blockages from combustion products in the muffler;
  • the level of contamination of the carburetor;
  • integrity of piston mechanisms.

If the engine does not start at all, check:

  • the position of the motor. when tilted about the center axis, it must be put back in place to avoid more serious malfunctions;
  • the availability of a sufficient amount of fuel;
  • the level of contamination of the tank cap;
  • fuel supply system to the carburetor;
  • the level of contamination of the spark plugs and the fuel tank valve.

2.1 Repair of the carburetor of the walk-behind tractor

Restoring the function of the carburetor is easy with the help of its competent cleaning from blockages. To eliminate contamination, the unit is disassembled, cleaned in accordance with the manufacturer’s recommendations and re-adjusted. The algorithm of actions is in the instruction manual for walk-behind tractors.

Carburetor on a walk-behind tractor

You can adjust the carburetor by adjusting the operating parameters of the float, which is located in a partially closed chamber.

All manipulations are reduced to restoring the uniformity of its immersion by eliminating the deformation of the bracket with which it is attached to the piston system.

The adjustment can be done with the needle valve closed or open. In both cases, the elimination of the bracket deformation is carried out manually or using a screwdriver, all actions must be precisely directed.

Simultaneously with the repair or diagnostics of the state of the carburetor, it is also recommended to adjust the valves on the walk-behind tractor. The procedure involves checking the tightness of each valve to restore optimum valve clearance. Adjusting the valves of the walk-behind tractor allows you to restore its functions, the exceptions are serious breakdowns in the carburetor or other systems of the unit.
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2.3 Fuel pump repair

The high-pressure fuel pump, or high-pressure fuel pump, performs one of the key functions in the operation of the walk-behind tractor. at a certain point in the cycle, it supplies metered fuel to the engine cylinders.

Symptoms of a pump malfunction are:

  • violations in the supply of fuel to the engine injectors;
  • fuel leaks as a result of mechanical wear;
  • atypical noises and sounds during work;
  • failure of basic settings.

A properly adjusted fuel pump ensures the correct operation of the engine and other systems of the walk-behind tractor. The design of this element is rather complicated, therefore we do not recommend repairing it yourself.
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1 Components of the walk-behind tractor and their functions

With a compact size, the walk-behind tractor is a rather complex mechanism, for the diagnosis of malfunctions of which you should first figure out what the function of its main components is.

A classic walk-behind tractor consists of the following systems and elements:

  • a fuel system, which includes a carburetor, a fuel tank complete with a crane, a supply hose and an air filter;
  • manual or electric starter (in professional models), designed to spin up the main shaft (this function is performed by the starter cord);
  • a cooling system, driven by the rotation of the crankshaft, and provides for the injection of air flow by the impeller of the flywheel;
  • the ignition system responsible for the formation of a spark;
  • gas distribution system that supplies the fuel mixture to the engine cylinders and releases gaseous waste.

Alternator belt tensioner pulley. How to replace the alternator belt tensioner pulley

The role played by the car generator is simply impossible to overestimate. This important unit ensures not only the efficient operation of the electrical wiring of the car, lighting fixtures and other consumers of electrical energy when the car engine is running. The operation of the ignition system of the car directly depends on it, as well as such a useful function as recharging the battery while the engine is running. Therefore, it is very important that the car generator works properly and without interruption.

However, like any other complex technical unit, it requires careful prophylaxis and meticulous self-care. Even if the generator is connected according to all the rules, some of its components fail over time.

Generator idler roller cost

The tension roller price depends on several terms. The main ones are the following:

motoblock, belt, tensioner
  • Manufacturing material. The element can be made of metal, high-strength plastic, or composite materials. In any case, it includes a metal bearing group.
  • Car make and model. As you know, one and the same part can differ significantly in price, in accordance with the prestige of the machine.
  • Design features. The more complex the design, the more expensive the alternator belt tensioner pulley.

Nevertheless, to name the average (for bracket structures) up to 700-800 (for eccentrics) is not a serious problem in terms of its acquisition. As you can easily see, idler pulleys are relatively inexpensive. Yes, and to install or replace it, you will not need any special skills and abilities, a particularly complex tool or special equipment.

Types of parts

Today, the alternator belt tensioner pulley can be of two types:

  • Eccentric. That is, a roller with an offset center of gravity.
  • Special movable bracket. The tensioner roller is mounted on it.

It must be understood that parts intended for brands and models of cars from different manufacturers may have their own design features. That is, the belt tensioner roller of the Lacetti generator is unlikely to work correctly on an Opel car or any other. However, parts from some manufacturers have a certain degree of interchangeability. However, only highly professional specialists with the necessary theoretical knowledge and rich practical experience can determine this degree.

Simple. does not mean somehow!

It is quite obvious that replacing the alternator belt tensioner roller (Kalina is no exception) is not so difficult. By and large, almost any car owner will be able to cope with such work. However, the simplicity of this operation should not mislead the owner of the vehicle. Negligence is unacceptable in the repair and maintenance of a car in absolutely any process, no matter what part it concerns!

Signs of failure

There are several signs of problems in the operation of this element:

  • the generator does not fully charge, or no electricity is supplied to the on-board network at all;
  • squeak from the side of the belt;
  • increased hum;
  • strong vibration of the roller or belt when the power plant is running;
  • backlash in the roller;
  • belt wear on one side;

It is worth noting that some signs are inherent in malfunctions with the elements that the roller drives. For example, a hum or squeak can also be the cause of wear on the bearings of the power steering pump, air conditioning compressor and the same generator.

DIY alternator belt tensioner

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HOW TO: MAKE A BELT TENSIONER

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Alternator belt tensioner pulley and replacement

The generator is one of the most important elements of the car’s electrical supply system, since it generates electric current to power on-board electrical appliances. It is driven by the crankshaft of the power plant, which ensures continuous operation of the generator while the power plant is operating. A belt is used as a drive for this element.

The main condition for the normal functioning of the generator is the complete transmission of rotation from the motor. In order for this element to be able to generate the required amount of electricity, it must rotate at high speed.