How to repair the Sterwins lawn mower gearbox.

Repair of electric and gasoline lawn mowers with your own hands

Repair of lawn mowers of both gasoline and electric may need at the most unexpected moment. We will talk about the main breakdowns of homemade and proprietary equipment, tell you what to pay attention to, and by what signs you can recognize the malfunction.

Lawn mower. A wonderful alternative to a manual spit that facilitates and accelerates the mowing of grass in a wide variety of places, including those where an ordinary braid for grass simply does not turn around. But for comfort and convenience there is a complex modern mechanism that requires tireless attention and regular service.

Regardless of the manufacturer, all units have a similar design. Therefore, the repair of the Viking lawn mower with your own hands is carried out similarly to the repair of other brands: Husqvarna, Shtil, Bosch, Garden, Oleo-Mac. A home.made lawn mower will not be exceptions, but elimination of breakdowns requires elementary knowledge. Consider the most typical reasons for the engine failure, and repair the lawn mower with your own hands in the field.

Repair of the mechanical part for all types of lawn mowers

Regardless of the type of engine, the mechanical part of the braid braid includes knives, the ejection or accumulation device of mowed grass and the transmission mechanism. Most often, knives come out or end the fishing line for a trimmer.

Cleaning the mechanical part of the Bosh lawn mower

Damage or bending of knives is visible to the naked eye. Depending on the material and the degree of damage, the knives are replaced or restored by simple bending into the original state. With severe wear, the cutting part can be submitted. DIY trimmer’s lawmaker, made with your own hands, can fail for many reasons. Most often, this is an excess of the maximum permissible load for torque and the engine, since a knife is used instead of a fishing line.

When examining, check the condition of the air duct for the supply of grass to the container and, if necessary, clean it. complex mechanical breakdowns require a complex tool, special equipment, professional skills and elimination of such malfunctions is better to entrust professionals.

How electric lawn mowers are arranged

The general layout of electric lawn mowers is the same.

An electric motor is installed on the wheel chassis, directly or through the belt gear, a rotating cutting tool that cuts the grass at a certain height.

However, despite the general principle of work, all braids are divided into types of:

Type of chassis

Most lawn mowers are equipped with a four.wheeled chassis with a rigidly fixed axis of the front wheels, so for rotation, especially during the mowing of grass, it is necessary to press a little on the handle to tear the front wheels from the ground.

Indeed, during the turn, the direction of movement of the apparatus and the direction of rotation of the wheels do not coincide, which is why the latter resist the side movement, and the cooler the turn, the stronger they resist the movement.

Some models are equipped with front piano wheels, the axis of which does not have rigid fixation, so that the axis of their rotation clearly follows the trajectory of the lawn mowing, therefore, regardless of the steepness of the turn, they never move sideways.

STERWINS.Обзор.Как снять и заточить нож на газонокосилке

Almost all three.wheeled lawn mowers are equipped with front piano wheels, so it is much easier to control them than four.wheeled. However, the most maneuverable are two.wheeled models, because regardless of the steepness of the rotation of their wheels never move sideways.

engine’s type

Collector and asynchronous motors of alternating current are installed on electric lawn mowers.

The former have somewhat smaller efficiency, but it is much easier to perceive high loads or overloads, the latter more effectively turn electrical energy into rotation of the shaft, but greatly increase the cost of the apparatus.

This is caused by both the highest cost of collector engines, and the need to protect them using belt transmission. The main difference between collector engines is the presence of contacts (collectors), therefore they are sometimes called collector engines, confusing with direct current motors.

Devices with a collector engine are well suited for mowing lawns and other territories planted with cultural vegetation, however, their use in areas overgrown with wild grass, especially tall and thick, is undesirable.

After all, such vegetation sharply increases the load on the engine windings and the brushes of collectors, as well as on the details of the belt transmission, all this leads to a rapid decrease in their resource. Asynchronous engines are deprived of this drawback, however, when working with them, it is necessary to use different methods of mowing well.groomed and high grass.

Type of cutting tools

The vast majority of the devices are equipped with a rotary cutting tool, that is, knives mounted on the engine shaft, which rotating, cut the grass and throw it through the side or rear window. During the rotation, such a knife is created by a vertically directed air flow that raises crushed grass and provides an even surface after mowing.

To some extent, the rotor cutting mechanisms can also be attributed to fox, which are installed on wheeled trimmers for the grass, only instead of a metal knife they cut the grass dispersed to huge speeds with a fishing line.

The main drawback of the knives of the rotary mechanisms is their vulnerability before solid obstacles, because rotating at high speed, they stock up enormous kinetic energy. Therefore, in a collision with an obstacle, not only defects of the cutting edge appear, but also the shape of the knife is often disturbed, due to which an imbalance appears, leading to strong vibration during engine operation.

Part of the lawn mower is equipped with a drum cutting mechanism, which is a hollow drum of steel plates, as well as a sharply.mounted knife operating on the principle of scissors.

The rotating drum captures the grass and leads it to the knife, which cuts vegetation, so such a mechanism is deprived of the main lack of rotary analogues. After all, the speed of rotation of the drum is much lower, which means that the energy accumulated in it is not enough to damage the plates, in addition, the knife does not contact obstacles at all, so defects do not appear on its cutting edge.

Method of ejection and processing of grass

The knife rotating at high speed not only cuts off the grass, but also gives it acceleration, so that the centrifugal force presses the cut vegetation to the deck, so it flies through the rear or side window, depending on the configuration and the operating mode of the mower.

If both holes are closed, then the cut grass passes between the ends of the knife and the walls of the deck, after which it falls down.

When working in this mode, falling fragments are quite large, comparable to those that fly through the windows provided for this.

If, together with a regular knife, set additional (mulching), then the size of the grass falling to the ground will be reduced several times, so this mode of operation is called mulching. All rotary braids can not only throw the grass back, but also collect it in the grass collector, this mode is in demand where for any reason you can not leave mowed vegetation on the site.

Drum mowers work a little differently. rotating, the drum accelerates the fragments of cut vegetation inside it, which are pressed to the tightly adjacent gas mowing housing. Therefore, at the time of passage through the output window, they fly out under the influence of centrifugal force.

All drum braids are equipped only with the rear emission, however, part of them includes a grass collector, so such models can be used not only for haircuts, but also to remove mowed grass from the site.

Way to travel

All electric lawns, regardless of the type of cutting mechanism, are divided into self.propelled and non.self.propelled. The former is equipped with a clutch and belt transmission, as well as a gearbox that lower the speed of rotation of the engine to the optimal level for wheels.

How to use electric lawn mowers correctly?

The use of these devices implies not only the mowing of grass, but also the maintenance carried out before and after the mowing.

In addition, for new devices, the correct assembly is also needed, because most of them are delivered in the form of individual nodes located in a common box.

Since the assembly methodology of each model is individual, we recommend that you carefully read the corresponding section of the instructions for the operation of the device, which is also often called the user manual.

Ремонт газонокосилки STERWINS

Preparation for work

Preparation for work begin the external inspection of the device, paying special attention to the integrity of the insulation of the wires, including extension cords, in addition, do not forget to check all threaded joints. In addition, carefully inspect the mowing housing, if cracks or dents are found on it, then you can’t use such a device, first it must be disassembled and the condition of the internal parts and mechanisms is checked.

If everything is in order, then install the device on a flat surface, connect via extension cord to the outlet and turn on the engine. the mitch should work without knocking or vibration. After 10–20 seconds, if the smell of smoke does not appear, turn off the engine and disconnect the extension cords from the network.

then first eliminate their causes and only after that, having completed another check, proceed to the mowing of grass. In addition, do not forget to check the condition of the cutting edge of the knife, turning off the device from the outlet and waiting for the end of the rotation of the engine shaft.

If the knife is stupid or damaged, then replace it with a new one or sharpen it with subsequent balancing.

In drum mowers, check the condition of the drum plates and sharpening the knife, if the knife is stupid, then sharpen it, strictly following the operating instructions.

If you are planning to work with the grass collector, then check its condition and install it on the lawn mower to make sure that it adjacent.

Having discovered a loose fit of the traumatic collector, remove and eliminate the reason that is most often noticed during cleaning the grass.

Also check the ease of rotation of the wheels, if one or more of them rotate tightly, then check the condition of the bushings or bearings, if necessary, cleaning them from the grass.

If it is recommended to lubricate bushings or bearings in the operating instructions, then do this by finding the slightest resistance to rotation.

In addition, remove any solid items from the site, including:

The mowing of the lawn

Let’s move on to the question of how to mow grass properly. Start the mowing of the grass by unwinding the extension cord and laying it with large loops to exclude twisting when removing the mower from the outlet. Can be laid with a snake or in any other way, the main thing is that during the removal of the mowing he does not get confused and does not be in the way of moving the mower.

Then set the optimal section for this section, then first connect the cable to the outlet, then the lawn mower to the cable.

For ease of work, fix the cable using special mounts to exclude disconnecting the plug of the lawn mower from the cable socket.

On the vast majority of models, the engine is turned on using a button and lever, this is described in more detail in the operating instructions. Having turned on the motor, move the mower in the direction of the outlet, the non.self.propelled model smoothly push you in front of you due to your physical strength, activate the self.propelled drive using a special lever.

The speed of movement should be such that even a meeting with thick grass does not lead to a decrease in engine speed (they are controlled by ear). If the revolutions have fallen and the sound of the mower has changed, then stop moving forward and hand it a little, then continue moving forward, but already at a lower speed.

When working in the rear emission mode, including with an installed grass collector, a snake is the optimal trajectory of movement along the area of ​​the optimal trajectory.

To do this, first, on the edge of the site, remove to the maximum distance, then unfold the mower and shift to the width of the mowing sideways, then move the device towards the outlet.

If the turn is right, then the extension cord should be to the left of the mower, if left, then on the right. To reduce the likelihood of a wire fall under the knife, it can be thrown through the elbow of the corresponding arm. That is, when turning to the right to throw through the left elbow, and when turning left, through the right.

When working in the side emission mode, the cable should always be on the opposite side, and to reduce the likelihood of falling under the knife, it can also be thrown through the elbow.

When working with the grass collector, follow not only the indicator of its filling, but also the sound that the lawn mower produces. If the sound has changed, but there is no section with thicker grass, then the grass collector is full, so it is necessary to stop the engine and remove the mowed grass.

What clothes to use

The choice of clothing affects the safety and efficiency of mowing grass.

A dangling sleeve can hook and block the lever of the knife or wheel drive, and the probability of falling when working in shoes on slippery soles is very high.

Therefore, to work with a lawn mower, you need:

  • shirt with long fastening sleeves;
  • long pants made of dense fabric;
  • foot covering the leg on strong corrugated soles;
  • protective glasses or mask;
  • Hat or cap (on a hot sunny day).

How long can you use?

The optimal operating mode for each model is described in the operation manual for the lawn mower.

If this document is not available for some reason, then adhere to the rules 15/10, that is, mow the grass for 15 minutes, then wait 10 minutes until the motor cools down.

Dismantling the lawn mower

I had to unscrew the lid on the housing of the lawn mower, under which the cable went on the side. But here, too, was awaiting difficulty. The screws of the screws were hidden in the depths of the secret holes and were tightly clogged with grass with the ground. After cleaning the heads of garbage, it became clear that they were designed for a cross screwdriver, but all attempts to unscrew them with such a screwdriver were unsuccessful.

Managed to display them with a screwdriver with a flat sting. It turned out that the center of the Schlitsov was raised and the cross screwdriver did not fully enter the engagement. Another protection against independent disassembly.

After removing the lid, it was found that the cable was recorded by four self.tapping screws of the same size, but with normal slots. Therefore, to exclude difficulties in unscrewing the lid in the future, rusty screws that previously hold the lid were twisted into cable clamps.

After many years of work, a lot of mowed grass accumulated inside the lawn mower, which wrapped the connectors and the start.up capacitor. I had to remove it to continue the repair.

After cleaning the lawn mower, access appeared to the connectors. To dismember the connector coming from the switch, it was enough to take the latch with a flat screwdriver to the side.

In the lawn mower, an asynchronous single.phase electric motor was installed, not having a collector and brushes. Thanks to this, there is no need for regular maintenance of the lawn mower. This lawn mower for ten years refused for the first time.

And then another malfunction was discovered, which did not show itself. When checking the freedom of rotation of the engine rotor by influencing the impeller, it turned out that it was not fixed on the shaft and easily starred.

The surface of the engine’s holes on the engine shaft was smooth. It seems that when spent, the knives fell on the branches, stones and, as a result of repeated jerks, the plastic of the impeller was cut off.

For reliable fastening of the impeller, the engine shaft was wound in one layer of a strip of a medical patch on a fabric base with a protrusion for the end of the shaft for 5 mm. Then, through a wooden gasket by blowing a hammer, the impeller is planted on the shaft. The landing was quite durable.

The breakdown of the circuit breaker unit in this case turned out to be good, since due to wear of the impeller mounting, the engine could burn out due to overheating and I would have to buy a new lawn mower.

Search for a malfunction

The external inspection of the contacts of the connectors and windings of the electric motor did not reveal deviations. The electrical diagram of the lawn mower can be checked and you can check it using a multimeter. Measuring the resistance of the windings with a multimeter included in the resistance measurement mode did not reveal their cliff or short circuit.

A segment of the cable that goes from the switch to the engine was also checked. When connecting an ohmmeter to its ends and intensive bending, the resistance did not change and was zero. It became obvious that the malfunction is in the junction unit, which was to disassemble.

Many manufacturers of electrical devices to exclude the possibility of independent repair during assembly use screws that can only be tightened. The supporting plane of the beam towards the unscrewing is made at an oblique angle and the screwdriver cannot catch.

In addition, the head of the screw has a slot under a trihedral screwdriver, which in the standard sets of bit I have not met. But this obstacle is easy to get around if you heat the screw using a soldering iron or emitting a suction of a self.tapping screw using a drill and a drill rotating counterclockwise.

The screw warmed up to the softening point of the plastic is easily unscrewed by the sting of a flat screwdriver selected. By the way, you can also unscrew the strongly rusted and cloudy screws and screws. I had to do this more than once when repairing electric kettle. When assembling I replace exclusive screws with self.tapping screws, with a standard head.

The switch cover still holds on two snapping latches, which must be taken to the side through the existing slots in the housing. The location of the latch is shown by arrows.

The most common problems

Here are the most common malfunctions:

  • the engine does not start;
  • The motor stalls arbitrarily;
  • The engine does not gain momentum or does not hold them;
  • Immediately after the start of the mowing, the engine speed falls and it stalls or works with interruptions;
  • smokes strongly;
  • It goes badly;
  • does not stop even after the operator released the wheel drive lever;
  • shakes hard;
  • Poorly cut the grass.

The engine does not start

There are quite a lot of reasons why the motor does not start:

  • empty fuel tank;
  • a air filter is clogged;
  • a muffler is clogged;
  • The ignition switch is installed in the wrong position or faulty;
  • The air damper control lever is in the wrong position;
  • faulty candle;
  • broken or clogged carburetor.

Primary inspection

To establish the real cause of this defect, you must first conduct a full external inspection and make sure that the openings of the air filter or muffler are not clogged, there is gasoline in the tank, and the throttle control lever and the ignition switch are in the correct position.

If everything is in order with this, then it is necessary to carry out pre.launch work, including cleaning air or fuel filters, described in detail in the instructions for the operation of the mower, and then try to start again.

After making sure that the motor still does not start, the mowing is placed on the table and proceed to a more detailed search for the reasons.

First, the spark plug is twisted and tightly plug the candle hole with your finger, then smoothly, but quickly and strongly pulled the hand starter cable or pressed on the electric launch button.

The moving piston should create sufficient air pressure so that it pushes the finger and goes outside. If this does not happen, then the motor needs serious repairs, which is difficult to make at home, so it is better to take the mower to a specialized workshop.

After all, the reason that the piston does not move after the starter’s cable or rotating the shaft of an electric starter may be:

  • Damage to the starter, because of which he does not transmit the energy of rotation to the engine shaft;
  • The cut off the flywheel that connects the flywheel and the starter with the engine, and also provides the correct ignition angle.

To eliminate both malfunctions, not only tools, but also skill are needed, so those who do not have the skill of repairing any engines are better not to try to eliminate such problems on their own.

Further check

If the piston moves, then you must first check the fuel supply, for which the candle is thoroughly wiped with a dry clean rag, then screw it into place, and the regulator of the position by the air damper is placed in the “OFF” position, as during the start of the engine.

After that, the fuel is pumped up (if the engine design provides) and twitch the hand starter cable several times or pressed on the electric starter button and hold it for 1-3 minutes.

Then, the lever of the air damper is transferring to the “ON” position and the candle is unscrewed, which is carefully examined.

Wet contacts indicate that gasoline enters the engine and the problem of ignition, and dry contacts say:

In both cases, knowledge and equipment are necessary for proper diagnosis and repair, therefore, it is better to take the device to repair the apparatus to a specialized workshop.

If the fuel comes, then it is necessary to check the external condition of the ignition coil and the high.voltage wire. If they have cracks or poor contact as between the wire and the coil, so at the place of connection of the wire with the candle tip, they must be replaced.

If everything is fine, then you need to check the spark, for which you can use both a deliberately serviceable candle and a bolt suitable in diameter, which is inserted instead of a candle in a high.voltage wire.

The operations described below, if they are performed with errors, can damage the ignition coil, so if you are not sure that you can do everything right, then it’s better not to take risks and entrust such a check to professionals.

The candle is leaned with threads against the ribs of the engine cooling shirt, and the bolt is placed so that it does not come into contact with the mowing case or its engine, and the distance from it to the cooling shirt was 1-2 mm.

After that, disconnect any wire going to the ignition switch, then pull the lever of the manual starter or press the electric button and see if the spark will appear.

If there is no spark, then the device does not start for one of the reasons:

For the repair of these damage, skills and equipment are needed, so those who do not have them are better to trust professionals. If there is a spark, then the problem is in the spark plug, so after replacing it will work.

The motor stalls arbitrarily

The most frequent reasons why the engine stalls during operation are:

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  • Dirty air filter;
  • Dirty fuel filter (only for models with a fuel filter);
  • faulty ignition switch (does not completely open the ignition circuit);
  • damaged insulation of the ignition shutdown wires;
  • faulty air damper drive;
  • the tightness of the ignition coil is broken or its winding is broken.

The primary inspection is performed in the same way as described in the previous section. If everything is fine outwardly, then carefully examine and feel all the wires suitable for the switch that blocks the operation of the ignition system, is possible somewhere damaged and when contacting the naked metal of the case, there is a short circuit that extinguishes the spark.

A gasoline lawn mower is a complex motorized equipment that needs proper timely maintenance and periodic repair.

Now you know what malfunctions can independently eliminate most of the owners of gasoline lawners and how to do it, and in which cases it is better to contact the workshop.

Frequent malfunctions

Regardless of operational conditions, the owners of lawn mowers sooner or later have to face the fact that they are not included at all or do not work in normal mode.

Timely identification and effective elimination of problems. this is the key to the longest possible service life. The “symptoms” of the most common breakdowns include:

  • the appearance of extraneous sounds in the region of the deck;
  • highly tangible vibration at the time of turning on the knife;
  • the appearance of a whistle during operation of the lawn mower;
  • Significant deterioration in the quality of mowing.

In addition, in situations with benzo.cosers, one often has to face the fact that the device is poorly started or not gaining momentum. The list of causes of such malfunctions is quite wide.

over, their timely identification and the presence of certain knowledge allow you to fix the devices on their own with minimal costs.

Replaced parts in a lawn mower

The lawn mower with any type of drive is characterized by a complex device. Over time, any car node wears out. Sometimes you have to repair or replace the main structural elements of the device:

In order for the internal combustion engine to last a long time without repair or the need to replace, the appropriate fuel mixture should be used, monitor the level and quality of the oil used.

Gasoline and electric lawns require regular maintenance. In this case, it is necessary to change the following details in order to prevent:

  • transmission belts that can be partially damaged or stretched, which is dangerous for the further practical use of the mowing;

All the parts of the operational lawn mowing model are replaced. Their list with labeling is contained in the user management passport attached to the equipment. Most of the nodes today are standardized. this easily allows you to choose and purchase the required spare parts. In order not to make a mistake, it is recommended to buy replaced parts, focusing on their passport data. This is the most relevant if the product of the manufacturers used has already been removed from the release.

How to lubricate the gearbox gearboxes

Buying any equipment in its kind is a lottery, but much also depends on the gardener. In caring hands and Chinese samples serve for a long time and do not let their owners at the wrong time. And if you forget to lubricate the motorcosa gearbox in time, do not clean filters, use cheap low.quality gasoline, then garden equipment from the most eminent brands will be a headache.

Lubrication of the gearbox Motokos is one of the most important elements of maintenance of a gasoline trimmer for grass, which the user should be carried out directly.

Time and procedure for the prevention of the gearbox

I recommend that the prevention of a new gasoline trimmer for grass immediately after purchase, with the addition of lubrication in the gearbox. For all the high cost of garden technology, some manufacturers save and lay lubrication only at a minimum, for the duration of the

How often to lubricate the gearbox motokos

Often, a preventive inspection of the transmission with the addition of liquid consistent lubrication is carried out once a year at the beginning or end of the season. If the gasoline trimmer for grass is used not in professional volumes, this is enough.

With large volumes of the mowing, lubricate the motorcosa gearbox every 20-50 hours of work. If the conditions of the operating mode of garden equipment are difficult, for example, a large field is pumped out at a time, and at the same time the lawn mower does not have time to cool down, or cheap lubricants are used, then the lubricant must be checked and added every 20 hours of work.

Indirect evidence that it is necessary to lubricate the gearbox to overheating or increased noise of the node.

I also recommend a complete replacement of lubrication, with disassembly and flushing of the node, when buying a used gasoline trimmer for grass.

Lubrication for gearbox of gasoline trimmer for grass

Assortment of lubricants for garden technology

According to the instructions for lubricating the conical gearbox, a special transmission liquid consistent grease should be used. As a rule, manufacturers of garden equipment produce and recommend the chemistry of their brand as the most adapted to their devices.

At the same time, to reduce the cost of the operation of garden equipment and increase the attractiveness of a brand of auto chemistry, grease for garden equipment usually produces multifunctional. It is intended not only for lubricating gearboxes of gasoline trimmers, but also for processing hoses, transmissions and gearboxes of any garden equipment and mechanical devices operating under high loads.

Such lubricant for the gearbox is sold in the tubes convenient for use and subsequent storage.

Even if a specialized lubricant for the gearbox was almost completely developed during operation, the additives still create an effective lubricating protective film on the surface of the gears.

It should be noted that many owners of the motorcycle in the vast CIS for lubrication of the gearbox use ordinary litol-24 or lubricant for Circus on a lithium basis. It is convenient to refuel the gearbox using a 5-cc medical syringe.

A undoubted plus of the use of lithola and lithium.based lubricant for refueling the transmission of motorcycles is a reducing reduction in operation. But there are nuances because of which spears are breaking on the forums of the Internet gardeners. My thoughts on the topic, what can be lubricated with lubric.based lubricants, and what is not read in the article “Litol as lubrication of the motorcosa gearbox”.

How to lubricate the motorcosa gearbox, gasoline trimmer for grass

Side Bolt on 17 on the gearbox of a gasoline trimmer for grass

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In order to avoid random launch, all preventive work on a motorcycle is necessarily carried out with a removed electric cap / plug from a candle. Do not turn the trimmer for the grass to avoid gas leakage.

We unscrew the side screw on the motorcosa gearbox. Depending on the company.manufacturer of a garden tool, instead of a screw for a hexagon, there may be a turnkey bolt, more often at 17. The thread is ordinary, unscrew counterclockwise. Do not lose the sealing puck.

If the lubricant is not visible on the internal end part of the screw, then it is necessary to add 3. 4 grams. Scroll through the gear with your hand, changing the direction of rotation so that the lubricant is distributed through the gears.

Then set the screw in place, tightly tightening it.

How to disassemble and assemble a trimmer for grass

For an independent disassembly of a trimmer for grass, a set of tools is prepared:

Disassemble each node of the device separately for diagnostics.

Dismantling the electrimmer

Electric trimmer for grass consists of a main electric block and a rod. Consider how to analyze for the repair of the electric part:

  • Put an electric car on a flat surface.
  • Unscrew the fixing screws of the trimmer body for grass on one side.
  • Having removed the lid, you can diagnose, repair or replace the electric motor, drive and bearings, brush unit, launch buttons and other elements.
  • To assemble a trimmer ectric for the grass should be sequentially: first, install the motor by tightening the fasteners; connect an electric circuit; Gently lay the wires in the case in the corresponding recesses; Close the top cover and tighten the screws.

Dismantling of a benzotrimmer (the video instructions shows a trimmer for Gruntek BS 52x grass) for engine repair is performed as follows:

  • First you need to remove the gasoline engine from the rod.
  • Disconnect the starter by unscrewing the fixing bolts.
  • Remove the protective casing of the gas tank, and the tank itself.
  • Unscrew the spark plug and remove the outer engine cover.
  • Remove the carburetor, pipe, ignition and muffler from the engine.
  • In order to conduct diagnostics and replace faulty parts of the motor, first of all it is necessary to disconnect the clutch node. To do this, fix the combustion chamber, and with the help of a unit key, unscrew the fixing bolts of clutch.
  • After the repair, collect a motorcycle, performing the same action in the reverse order.

What trimmer do you use in a summer cottage, and whether to repair the tool yourself?

Dismantling and repair of the upper gearbox Motokos Trimmer for grass

If you have questions about the repair of the upper gearbox Motokosy. Ask, answer.

There is a “tatra” lawn mower, and there is no one through the holes in the clutch cup. only on the bearing from the shaft side. How to remove a cup (slots are licked on it)

at idle turns, it turns the coil does not stop. Answer what could be

Thanks for the video, I’m going to sort out the elated Stihl 400 in winter, so that is very. informative. IMHO: The bearing is probably better to besiege the inner ring.

Hello! The problem of the upper gearbox scrolls along the rod along with the engine. what to do? I have a gasoline trimmer for PIT grass. Thanks

Thanks for the cognitive video. Very helped when replacing the plate.

Good day. I faced the following problem: I have a Sterwins PBC43R 42.7 SS lawn mower. The diameter of the bar is 28mm. I burned only 5 liters of gasoline (2 months of use on weekends). Damage appeared, there are traces of oil on an elastic band of the art clutch art. 202362 and noticeable backlash in this node: vertical and around the axis of rotation (bar relative). Tell me: what is the approximate motorized resource of these elastic bands? Is there an elastic band amortizer for d = 28 mm and how to buy it (nowhere else) or is it universal with 26 mm? How much more practical and reliable the upper gearbox in the design of which is used by Dampfer art. 202088? Are there any advantages of a diameter of 28 mm except strength, since I understood spare parts much more difficult, I think about the transition for 26 mm? Thank you very much in advance!

Good afternoon, such a question for me can replace the upper gearbox square with a gearbox with 7 slots.

Press the bearing with blows on the outer ring is barbarism and murder of the bearing

In order to pull the shaft, you need to unscrew from the upper and lower gearbox?

See the people, in no case do not score the sweaters in this way.

By the way, all the videos show that you need to samd the lower gearbox, no one explains how and how to lubricate the lower gearbox and how often it needs to be done?

Tell me the gear ratio of this gearbox, I’m Sasha, thanks

how to replace the bushings inside the bar, bought the shaft 9, and it is thicker than the shaft 7

people do not knock down the bell! you will bent it, it must be instructed to be on the emphasis.

Hello, tell me, the bearing that you have changed as it is lubricated?Thanks.

in general, on the internal clip to press.

Hello. Do not tell me what can be made with a torn cut on Binzo braids for grass, on Tselindra where the carburetor is attached.

Bearing (any) on the shaft plants only on the inner ring

Good evening, the bar is staggering from side to side in the upper gearbox that you need to change the bearing or elastic band?Thanks

The dude with a specialist for an external clip is clogging the bearing, so that this motorcycle is again brought to him again.

Good day. Tell me the trimmer for the grass of the throttle lever when the “throttle” is positioned, and then when I translate to “start” the engine stalls.

After five minutes of work, Trimer is strongly overheating of the upper gearbox

Tell me why my upper gearbox is very hot ?

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Do not tell me, in the Demfer gum inside there is a clamp the upper gearbox (rod) how to pull out this clamp with an elastic band? It’s useless with his hands, it bursts in a vice, today this clamp in the form of a tube burst when I twisted the clamping of the rods, now I’m sitting with a scales of how to disassemble and make a new one out of the pipe, otherwise the second time is completely gearbox in collecting it.

The new ProCraft lawn mower, the upper gearbox is not clamped during assembly, pulled the bolt to the end, but lasts only on a fixing (from turning) bolt.What can be a way out of this situation?

Tell me, the upper gearbox is warming up and the bar is staggering what the reason may be?Kose 1 year, did not understand. thanks in advance.

Features of different types of gearboxes

Electro and benzos manufacturers install various models of gearboxes on their equipment. Usually they differ from each other in the shape and dimensions of the seat, which is performed in the form of a circle (popular diameter. 24, 25.5 and 26mm), square or sprocket.

Another difference between the gearboxes of Chinese and European brands are types of transmissions. They are conical, worm, spiroid, combined, wave, planetary, cylindrical. Typically, worm gearboxes are used on benzocoses.

Typical malfunctions. causes and elimination

With intensive operation, the gearbox may be damaged. Most of the malfunctions of this node are typical for different brands of trimmers and are eliminated the same.

  • Strong heating of the gear unit. There are two reasons. new not dead gears or lubrication: inappropriate, low quality or completely absent. If the problem is in the lubricant, it should be replaced by another. And the new gears should be running in for a short time without significant loads and interruptions so that the details have time to cool down.
  • The shaft seals during movement, a knock and backlash appeared. Such signs report about the wear of the bearings. It is necessary to disassemble the gearbox and install a new part. The destruction of the bearing is caused by poor lubricant or its absence, as well as an increased load of the trimmer for grass or getting metal objects into its planting nest, which occurs due to damaged anthers. To remove and install a new bearing, you will need a special puller or a hammer with a wooden bar. You need to beat carefully so as not to spoil the planting nest. Its preliminary heating is allowed only in the most difficult cases.
  • With kosbe, the gearbox hangs or flies from the bar. This means. its case is damaged, it is necessary to install a new part. If the defects are insignificant, you can pull the breakup with a metal clamp.
  • If the transmission mechanism does not hold on the bar, this means that the docking area is worn out. It is necessary to replace the rod of a new one or pin the mount with electrical tape if it is partially damaged.
  • The knife on the shaft does not rotate or stops with an increasing load. The reason is the wear of one of the gear or teeth. It is necessary to change worn.out details for new.

Most of the gearbox malfunctions, the owner of the trimmer for grass can eliminate independently. It is only necessary to have a suitable tool, spare parts (it is recommended to use the original ones. for a specific motorcosa model), and also know how to disassemble the gearbox in order to change the damaged element to a new.

Repair of Sterwins lawn mower

There were 56 service centers for the repair of lawn mowers (electric and gasoline), garden trimmers, sterwins grass: choose from the list, or send a request and the specialist will contact you.

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  • 24 hours
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  • Repair of the lawn mower sterins
  • Payment by card
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  • Departure of the master
  • Calling the courier
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  • Repair of the lawn mower sterins
  • Payment by card
  • Urgent repair
  • Departure of the master
  • Calling the courier
  • Free diagnostics
  • Repair of Sterwins lawn mower
  • Payment by card
  • Urgent repair
  • Departure of the master
  • Calling the courier
  • Free diagnostics