Boom replacement on brushcutter. Filling line

Dismantling and repairing the top gearbox of a grass trimmer brushcutter

If you have questions about brushcutter top gearbox repair. ask, I will answer.

there is a lawn mower “Tatra”, it does not have a retaining ring through the holes in the clutch cup. only on the shaft side bearing. How to remove the cup (the splines on it are slipped)

at idle speed spins the coil does not stop. answer what could be Satol.tol@rambler.ru

Thanks for the video, I’m going to rebuild my STIHL 400 in the winter, so I’m going to. informative. IMHO: the bearing is probably better to settle on the inner ring.

Hello! The problem with the upper gear is that it rotates on the rod with the motor. what to do? I have a gasoline grass trimmer PIT. Thank you

Thank you for the informative video. Very helpful in replacing the plate.

Good day. Faced with this problem: I have a lawn mower Sterwins PBC43R 42.7 CC. Diameter of the boom is 28mm. Burned only 5 liters of gasoline (2 months of use on weekends). Damage appeared, there are traces of oil on the clutch damper rubber art. 202362 and noticeable play in this unit: vertical and around the axis of rotation (rod relative to the engine). Please advise: What is the approximate life of these rubber? Is there a rubber damper under D = 28 mm and how to buy it (nowhere to be found) or is it universal with 26 mm? How much more practical and reliable is the upper gearbox with the damper art. 202088? Is there an advantage to the 28mm diameter other than strength, as I understand the parts are much harder to find, I am thinking of switching to 26mm? Thank you very much in advance!

Hi Hi, I have a question for you, is it possible to replace the upper gear square on the 7 spline?

Pressing the bearing by hitting the outer ring is barbaric and killing the bearing

I have to unscrew the shaft from both top and bottom gears to remove it?

Do not jam the bearings with it!

By the way, all the videos show that it is necessary to lubricate the lower gear, no one explains how and what to lubricate the lower gear and how often it should be done?

What is the gear ratio of this gearbox, I’m Sasha, thank you

How do I replace the bushings inside the rod, I bought a 9 shaft and it is thicker than a 7 shaft

People don’t ever knock the bell down like that! You’ll bend it, you have to put it on the stop on the inside.

Hello, could you tell me if the bearing you replaced is greased?Thanks.

actually on the inside of the rim.

Hello. What can be done about the torn thread on the cylinder where the carburetor is mounted?

The bearing ( ANYTHING) on the shaft is seated only on the INTERNAL ring

good evening, the boom is wobbling from side to side in the top gearbox what do you need to change the bearing or rubber?Thank you

Dude spontaneously by the outer rim of the bearing is hammered, so that he soon brought back to the brushcutter.

hello. advise grass trimmer throttle lever in position “throttle” The inner rim is the one that’s going to be pressed in, and then when you press the “start” The engine’s stalling.

boom, replacement, brushcutter, line

after five minutes the trimmer is overheated the upper gearbox, what’s the reason?

Tell me why I have a lot of heat on the top gear ?

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Do not tell me in the rubber inside the damper is the upper gear clamp (rod) how to remove this clamp with a rubber band? Hands useless, in a vice burst, with me today, this clamp in the form of a tube burst when I twisted the rod clamp, and now I’m scratching my head how to disassemble and make a new one from a tube, and the second time a complete reducer to buy the nasty.

New lawnmower procraft, when reassembling the upper gear does not clamp on the boom, tightened the bolt to the end, but held only on the fixing (against rotation) bolt.What can be the way out of this situation?

the upper gearbox is getting hot and the rod is wobbling what could be the reason?Mower is 1 year old, it was not disassembled. Thanks in advance.

The main faults of gasoline and electric trimmers

Lawn mowers and electric grass trimmers, if we don’t consider boom and mowing head failures, the main area of faults is the engine area.

Breakdowns of gasoline trimmers

Typical gasoline grass trimmer breakdowns most commonly encountered by owners of this unit are as follows:

  • engine failure;
  • problems with the carburetor;
  • Problems with fuel supply;
  • muffler failure;
  • gearbox breakage;
  • broken starter;
  • problems with the air filter;
  • the breather on the gas tank clogged.

Trouble with electric trimmers

As the device electric mower is much easier than mototrimmera, then the reasons for its failure a little.

It is necessary to note, that it is better to entrust the elimination of some of them to a specialist.

Basically, the grass trimmer stops working normally in the following cases:

  • failure of the electric cable;
  • faulty control button;
  • burned out winding of the engine stator;
  • contact breakage on the engine.

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Lawn mower does not start the engine

Everything is simple, a few basic points for any engine: the engine needs good compression, the lack of which will not allow you to start the engine. The next thing to check is the ignition, without a spark there will be no ignition. A clogged fuel system makes it hard to get fuel flow and a clogged exhaust system also makes it hard to start the engine.

That’s probably the main thing to check. The most popular repair scheme is the elimination method. That is in order we cut off variants of faults, I will tell in detail:

Failure of piston group

On all two-stroke machines that are brought to us, the first thing we check is the piston and cylinder scoring. You can do this by unscrewing the 2 bolts of the muffler and removing it, shine a light into the exhaust window. If the piston is smooth and the rings are springy, it is good, if the piston is damaged or the rings are stuck and corked, it is not acceptable. The cause of failure is overheating, old fuel mixture or lack of oil in the solution. The only panacea is an overhaul with replacement of the piston.

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Faults in the ignition of trimmers

Next, check the spark, leaning the plug on the ground and cranking the starter properly. If there is no spark, disconnect the wire from the coil to eliminate the switch. Perform all the operations only with a new spark plug. Dried, calcined, wiped spark plugs are NOT OK. Also there are cases when the spark is gone with a warm sprocket and won’t show up until it has cooled down. Possible bad contact between the cap and the spark plug wire. If the spark does not appear, it is necessary to replace the ignition coil.

Contamination of the fuel system

If everything is OK with the engine and the spark, let’s try to start the engine. We recommend to spray a carburetor cleaner in the combustion chamber, under the spark plug or in the carburetor window. The engine will start and will most likely stop, repeat the operation a few times. If nothing helps, you need to try cleaning the carburetor. We do not recommend doing it yourself, because of the presence of small parts or their absence due to inexperienced repair. Fuel system clogging, that’s the most common problem.

boom, replacement, brushcutter, line

carburetor malfunction

Unfortunately cleaning the carburetor is not a panacea and it is not always possible to clean it completely. Even ultrasound and a good cleaner are sometimes powerless. Also in carburetors often fail: needle, check valve, gas pedal valve, diaphragms, needle and seat. Somebody there will tell to what to break, but carburetor of saw is structurally more difficult than car carburetor. In many cases, you have to replace the carburetor as a whole or some of its parts.

Clogged brushcutter exhaust

Because there is oil in the gasoline, it burns and generates a lot of carbon monoxide that deposits in the muffler and exhaust window. On some trimmers there is a strainer. a flame arrestor, it, too, must be cleaned. Either replace the muffler or try to burn through. My experience is you can tell if the exhaust is clogged just by pulling the starter. If you find soot in the window, peel it off, it must not get into the combustion chamber. Use a good oil with low smoke emission.

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Tips on how to quickly start the machine

Some people pull the handle with such force that they have to make lawnmower starter repair with their own hands. This is only possible if the cable is torn or the cable handle is broken. In other cases it is advisable to replace the starter. This unit is sold as a complete unit.

Grass trimmer starter repair with their own hands

In detail: repair of the grass trimmer’s starter with his own hands from the real master for the site olenord.com.

Trimmer repair is necessary when the device does not turn on or does not function properly. All owners of private houses and country plots are familiar with the problem of excessive vegetation, getting rid of which is sometimes not easy. As you know, progress does not stand still in one place, and new developments and useful inventions appear in all spheres. It’s also true for agriculture. You no longer need to cut the grass with the old inconvenient devices, the help came to modern petrol mowers, which can get rid of vegetation in the most inaccessible places.

The gasoline trimmer can mow the grass even during cloudy weather. Lawn care with this unit is very simple, and any adult man can cope with this activity.

Despite its versatility, like any technique, trimmers for grass tends to break down and fail.

Lawn mower repair with their own hands can not every person, because this requires skills to repair electrical devices, but today we will try to figure out how to start the trimmer for grass without the starter, and how in general you can debug his work with his own hands.

Grass trimmer repair with your own hands involves the elimination of all the problems that interfere with the normal operation of the unit. Among the most common are the following:

  • failure of the cylinder-piston group (CPG) of the engine;
  • The grass trimmer fails when trying to increase the speed;
  • breakage of the ignition coil;
  • There is no connection between the engine and the gearbox;
  • There is a strange noise when you run the engine;
  • the engine can not reach the desired speed.

Engine failure can occur due to poor fuel quality or worn parts of the engine. As you know, the piston group is lubricated by oil, which is added to the gasoline. In old oil, the lubricant precipitates out in the form of sediment, which makes the oil unusable. If you continue to try to start the grass trimmer, you can kill the motor in a matter of seconds, and this will entail additional costs for the repair of the grass trimmer. This breakdown is considered the most expensive. To fix it you need to replace the complete piston unit, more precisely the cylinder, rings, piston and oil seals. In such cases, you can hardly do without additional help, unless you yourself are a craftsman and know how to handle such equipment.

Repair lawnmower with their own hands can be made if it starts and runs at idle speed, but then zabuhankayutsya when you try to increase the speed of work. To fix this breakdown, you need to repair the carburetor or clean the muffler or gas filter. At first glance, everything is quite simple to solve, but if after you clean the clogged parts of the grass trimmer, it did not work, then you may need additional diagnostics.

The main sign that the ignition coil has failed and trimmer repair is required is the lack of spark on the plugs. It is very important in this breakdown not to rush to replace the coil, in most cases the cause of the breakdown is a lack of contacts, in the switch button, which may be broken, or the problem in the spark plug itself. It needs to be checked by all means, perhaps there is a current breakdown somewhere, or there are gaps or fouling.

If the grass trimmer engine cannot reach the desired speed, it is likely that the air filter is clogged or there is debris in the engine itself. The solution to the problem is clear immediately. clean the engine and the filter, in some cases you may need to replace the filter.

Most trimmer users have to deal with a lot of noises during operation. If you hear a characteristic knock, as if on the metal, it is likely that the engine in the trimmer has overheated or the fuel does not pass. To get rid of this sound, you need to refill the gasoline or turn off the mower for a while.

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You should not exhaust the unit: if it will constantly work on wear and tear, its service life will be reduced by several times. If the knock is felt in the engine itself, the cause is a faulty piston, piston ring, worn cylinder or crankshaft bearing. To stop the noise, you need to replace the defective part in the trimmer.

Sometimes it happens that the engine in the trimmer works fine, but the output shaft rotates very weakly or does not rotate at all. This is indicated by the fact that when the grass trimmer touches the grass, it stops working at all and turns off.

To resume the normal operation of the mower, you need to check the 3 main components, namely:

Gearbox is a very important part, so the grass trimmer repair must be performed by an experienced master, but in order to avoid similar failures in the future, the gearbox needs to be serviced properly.

Besides the above mentioned failures other malfunctions can occur, for example, a start button snaps or the limiter of the mowing head falls off. You can replace the trigger with a soldering iron and the limiter can be wired with copper wire. You notice that the line for the trimmer is torn or finished? It is enough to buy a new coil of the same diameter of line and, having disassembled the drum, wind it on the bobbin.

If you want your mower worked long and without interruption, the service it needs to provide ongoing, you can contact service centers, or to diagnose yourself.

For this you need to constantly check the bushings of the boom and change them if necessary, the same applies to the spark plug.

In the gearbox you constantly need to hammer a special lubricant, partially disassemble the motor part and clean from accumulated dirt. In most cases, such maintenance of the grass trimmer is carried out, according to a certain number of hours worked.

Champion Grass Trimmer Repair with your own hands

In detail: repair of grass trimmer Champion with his own hands from the real master for the site olenord.com.

boom, replacement, brushcutter, line

Modern technology and equipment allow us to produce the best and optimal technical solutions, which become effective helpers in the arrangement of the cottage or household plot. Green lawns and other plantings can quickly grow, lawn mower, otherwise known as a brushcutter or trimmer, gasoline mower is used to tidy up the yard and mow the lawn.

Traditional lawn mowers are inconvenient and unsafe in use, requiring a considerable investment of time and their own efforts, which will help to save lawn mowers, combining in their design functionality and practicality. In the photo you can see a variety of high-tech devices, which are inherent in the set of performance characteristics, including such parameters as increased productivity and long service life.

Even with regular inspection, maintenance procedures and careful storage, such devices and their individual parts require repair and even replacement, all repair procedures can be made by yourself.

boom, replacement, brushcutter, line

The easiest way to give a lawnmower for repair, allocating a certain amount of money from the family budget, prompt and high-quality repair with their own hands is not less simple and convenient if you want to understand the design of the lawnmower and fix all the problems.

Mass and piece production of trimmers is based on the use of generally accepted technology, the typical design scheme consists of certain elements and parts, it is important to know them when carrying out independent repair work:

  • upper part. The base of the entire structure, where all the important elements are assembled, such as the starter, carburetor and lawnmower engine;
  • The middle part. Hollow rod, inside it there is a rope that connects the motor and gearbox, which sets in motion the cutting line for the trimmer. In this part there are mounts to distribute the weight of the entire structure and a belt for fixing the grass trimmer on the belt of the person using the grass trimmer for its intended purpose;
  • bottom part. gearbox and cutting elements are concealed under the practical cover to protect the user. The cover provides an increased level of safety by preventing large debris, stones, and glass from getting into the person while operating the chain saw.

Knowing exactly the internal structure and the principle of operation of the grass trimmer, it is possible to independently carry out repair measures for the structure or replace individual, failed nodes, using the repair manual.

The most common and frequent, subject to self-correcting breakdowns of the unit can be called the following problems:

  • engine malfunction, due to which the lawnmower does not start and does not work;
  • Strong vibrations in the brushcutter boom, making it difficult to use the machine for the intended purpose;
  • increased gearbox overheating during operation;
  • slow and weak functioning of the cutting line at insufficient RPM;
  • clogging of the starter grid, causing the engine to overheat and stop working;
  • rapid and frequent clogging of the carburetor due to the use of low-quality fuel;
  • clogging of the air filter if the care measures for the device are not observed.

Design of a gasoline grass trimmer. Lawn mower design and common malfunctions

The easiest way to give a lawnmower for repair, allocating a certain amount of money from the family budget, prompt and high-quality repair with their own hands is no less simple and convenient if you want to understand the design of the lawnmower and fix all the problems.

Mass and piece production of trimmers is based on the use of generally accepted technology, the typical design scheme consists of certain elements and parts, it is important to know them when carrying out independent repair work:

  • upper part. The basis of the entire structure, which collected all the important elements such as starter, carburetor and lawn mower engine;
  • middle part. The hollow shaft, inside which is the cable that connects the motor and the gearbox, which drives the cutting line for the trimmer. In this part, there are brackets for weight distribution of the entire structure and the belt to fix the trimmer for grass on the belt of the person using the trimmer for grass on purpose;
  • bottom section. It contains the gearbox and cutting elements, which are hidden under a practical cover to protect the user. The housing ensures an increased level of safety by preventing coarse debris, stones and glass from getting into the operator while operating the chain saw.

Knowing exactly the internal structure and the principle of operation of the grass trimmer it is possible to carry out repair measures for the construction or replacement of separate, worn out units, using the repair manual.

The most common and frequently occurring, self-correctable machine breakdowns can be called the following problems:

  • engine malfunctions that prevent the lawnmower from starting and working
  • Increased vibration of the brushcutter’s boom, making it difficult to use it for its intended purpose;
  • increased overheating of the gearbox, its accelerated heating during operation;
  • slow and weak functioning of the cutting line at insufficient speed
  • clogging of the starter grid, causing overheating of the engine and its failure to operate;
  • fast and frequent clogging of the carburetor due to the use of poor quality fuel;
  • clogging of the air filter if the maintenance of the device is not observed.
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All these problems can lead to the fact that the device will lose its ability to work, before ordering the necessary spare parts for mowerless mower should conduct a visual inspection and diagnosis of the device.

Particular attention requires individual parts and units of the device, to check them you do not have to go to a professional technician, a set of diagnostic measures will help your own hands to identify the consequence of the loss of performance.

Trimmer rod for grass repair with his hands

In detail: trimmer boom for grass repair with their own hands from the real master for the site olenord.com.

Grass trimmer repair is needed when the device does not turn on or does not work properly. All owners of private houses and suburban areas are familiar with the discomfort of excess vegetation, getting rid of which is sometimes difficult. As is clear, progress does not stand still and new developments and useful inventions arise in all areas. It also affected agriculture. No longer need to cut the grass with the old awkward devices, came to the aid of modern petrol mowers, which can get rid of vegetation in the most inaccessible places.

Gasoline trimmer can cut grass even during cloudy weather. The care of the garden with this machine is painfully simple, and any adult male will be able to cope with the task.

Despite its versatility, no matter what equipment, trimmers for grass tends to break down and fail.

Lawn mower repair with their own hands can not every man, because this requires the ability to fix electronic devices, but now we’ll try to figure out how to get the trimmer to grass without the starter, and how to generally can debug his work with his own hands.

Grass trimmer repair with your own hands involves troubleshooting all the problems that interfere with the normal operation of the unit. Among the most common are the following:

  • Breakdown CPG (cylinder-piston group) of the engine;
  • grass trimmer fails when trying to increase speed;
  • breakdown of the ignition coil;
  • there is no connection between the engine and the gearbox;
  • there is an extraneous noise during operation;
  • the engine can not develop the necessary speed.

Engine failure can be caused by poor fuel quality or wear and tear on engine parts. As you know, the piston group is lubricated by oil, which is added to the gasoline. Old oil precipitates grease, which makes the oil unusable. If you keep trying to run the trimmer for grass, you can kill the motor in a matter of seconds, and this will entail additional costs for the repair of the trimmer for grass. This failure is considered the most expensive. To fix it, you need to replace the piston assembly, to be more precise, you may need to replace the cylinder, rings, piston and oil seals. In such cases you can hardly do without additional help, unless you are a master yourself and know how to handle such equipment.

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Repair lawnmower with their own hands can be done if it starts up and works at idle speed, but then zabuhankayutsya when you try to increase the speed of work. To fix this problem, you need to repair the carburetor or clean the muffler or gas filter. At first glance, everything is quite simple to solve, but if after you clean the clogged parts of the grass trimmer, it did not work, then you may need additional diagnostics.

The main sign that the ignition coil is broken and trimmer repair is required is the lack of spark on the plugs. It is very important in this failure not to rush to replace the coil, in most cases the cause of the failure is a lack of contacts, in the switch button, which may be broken, or the problem in the spark plug itself. It needs to be checked necessarily, perhaps somewhere punctures current or there are gaps or soot.

If the grass trimmer engine can not develop the desired speed, it is likely that the air filter is clogged or there is debris in the engine itself. The solution to the problem is clear at once. clean the engine and the filter, in some cases it may be necessary to replace the filter.

While working, most trimmer users are faced with constant noise. If you hear a characteristic knock, as if on metal, it is likely that the engine in the trimmer overheated or the fuel does not pass. To get rid of this sound, you need to refill the gasoline or turn off the mower for a while.

Do not exhaust the unit: if it will constantly work on wear and tear, its service life will be reduced several times. If the knock is felt in the engine itself, the cause is a faulty piston, piston ring, worn cylinder or crankshaft bearing. To stop the knocking, you need to replace the failed part in the trimmer.

Sometimes it happens that the engine in the trimmer works normally, but the output shaft rotates very weakly or does not rotate at all. This is indicated by the fact that when the grass trimmer touches the grass, it stops working altogether and turns off.

To resume the normal operation of the mower, you need to check the 3 main components, namely:

Gearbox is a very important component, so the grass trimmer repair in this case should be carried out by an experienced master, and to avoid such failures in the future, the gearbox requires appropriate maintenance.

Other malfunctions can occur in addition to the above mentioned, for example the on/off button can be jammed or the restrictor can fall off the mowing head. You can replace the trigger with a soldering iron and the limiter can be wired with copper wire. You’ve noticed that your trimmer line is torn or out? Enough to buy a new roll of the same diameter line and, after disassembling the drum, wind it on the bobbin.

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