How to change the disc on a Stihl lawn mower

Removing and replacing the clutch on a chainsaw. Overview, instruction

Repair kit, required tool

In order to remove, disassemble or adjust the clutch, we need the following tools:

Dismantling the chainsaw clutch:

Replacing the clutch

When replacing the clutch, we do not recommend using metal or plastic objects as a stopper. The former can scratch the cylinder, the latter can litter it.

change, disc, stihl, lawn, mower

We disassemble the clutch:

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  • Turn on the chain stop brake, remove the protective cover and dismantle the saw headset;
  • We remove dirt, sawdust, dried grease, if any;
  • Remove the air filter and candlestick;
  • Unscrew the candle using a candle wrench;
  • Rotating the crankshaft, we bring the piston to the top point, then set it back by 6-9 mm;
  • With a rope, 7-8 mm in diameter, we lock the piston in the upper position;
  • Unscrew the nut on the clutch with a special key-puller.

Most of the moving parts of a chainsaw are right-hand rotation. Therefore, the nut on the clutch has a left-hand thread. It is necessary to remove the cover by turning the key clockwise. It is forbidden to carry out this operation with a hammer and chisel. you will knock down the edges!

  • Remove the cover and drive sprocket. We diagnose faults and assess the wear of parts. Assessing the condition of the needle bearing;
  • If necessary, we replace parts with new ones (most often the leading sprocket needs it);

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The installation of the chainsaw clutch system is carried out in the reverse order, however, you should pay attention to some features.

How to adjust the clutch of a chainsaw?

How is the clutch adjustment on a chainsaw carried out? It is more correct to talk about repair, since the carburetor is usually subject to adjustment, and not the clutch. When we talk about adjusting the clutch, it is important to consider two nuances:

  • Chainsaws of some models, including German, Finnish, Swedish, have a special washer, it can be located between the motor and the sprocket or between the drum and the sprocket. This washer must be carefully removed, and then put back, in case of replacement, it must be replaced with an identical one;
  • the spring is not subject to contraction, therefore, if it breaks, the part is considered damaged and is replaced with a new one. The absence of a working spring will lead to a lack of lubrication on the chain.

How to unscrew the clutch on a chainsaw with your own hands:

Reasons why you need to disassemble the clutch:

  • Defective or burst spring;
  • As a result of loads on the chainsaw and wear of parts, the spring has left its place;
  • Chips on the clutch plate;
  • Wear of parts.

How to remove the clutch from a chainsaw and put it back in place?

Diagram of the process of removing the clutch from a chainsaw (for example, let’s take a situation when a drum needs to be replaced):

  • remove the saw headset using a universal key;
  • remove the chain, tire;
  • unscrew the air filter cover;
  • then we twist the candle;
  • we fix the piston with a stopper or rope;
  • remove the clutch with a punch (puller) or a universal wrench to remove the clutch;
  • remove the clutch by unscrewing it clockwise;
  • remove and replace the drum.

After the steps described above, the entire assembly is carried out in the reverse order.

Replacing the clutch Stihl 180

Matrix Turbo lawn mower blade adapter

Unfortunately, Matrix-direct has ended support for this product. In service centers that are on the list.

Turn the mower over to access the cutting tool;
Fix the knife with a wooden block;
Using the right tool, usually a socket or box wrench, unscrew the knife attachment points;
Remove the knife itself.

After cleaning the knife from adhering grass, dirt, you can proceed specifically to sharpening.

To sharpen a lawn mower knife, you will need a stable base. a table or workbench, on the surface of which you can comfortably position and fix the knife for final sharpening. Balanced option. if you have the ability to secure the knife in a vice.

When doing the work, keep in mind that the working part of the knife is hardened, you should try to make the impact on the blade as small as possible and keep the angle of sharpening of the lawn mower knife.

If the working parts of the knife are not damaged. burrs, notches, then you can limit yourself to straightening the blade. For which you can use an abrasive bar or a diamond-coated file. It is not required to remove a large amount of metal, and you can get by with a “thin” tool.

If the knife blades are damaged, they must be removed before sharpening with a coarse file, on an emery wheel or using an electric tool with an abrasive attachment.

If you are doing the work with a file or abrasive bar, then sharpening is done from the center of the knife to the edge. The movement of the instrument is “away from oneself”. After completing the work, it is necessary to check whether the balancing of the lawn mower blade has changed.

The sharpened knife can be installed on the mower and start mowing the lawn.

Stihl Line Trimmer- How to Quickly Exchange the Head in 20 seconds.

Sharpening a lawn mower knife from Lenfilm studio

We tried our best. If you are not very happy, then take a look at our website. There we sorted out the “flights” in detail.

The main stages of work

First, you need to drill a through hole in the center of the plate, and cut a thread in it to match the diameter of the stud. Next, bend four strips of metal at an angle of 90 degrees. We weld two of the blanks to the plate, and the remaining two to the previously welded strips, and additionally connect them with another strip.

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We weld a metal rod to the end of the stud, so that it is more convenient to unscrew and twist the device. We clean the resulting structure with an angle grinder and then cover it with 1-2 coats of spray paint. Cut the hairpin to size and screw it into the hole in the plate, putting on the nut first. The device is now ready for use.

Turn the mower on its side, block the cutting blade of the lawn mower and fix the frame of the homemade device to the body by rotating the hairpin. For the step-by-step process of manufacturing and assembling this structure, see the video on the website.

Editing edges

When the blades are sharpened, they need to be straightened. This is done using a piece of moisture-resistant sandpaper with a grain size of about 600-800 grit. The paper must be moistened with water and rolled into a cylinder with a diameter of 100-150 mm.

Editing aims to remove the slightest burrs and flakes that can wrap around the thinnest edge of the blade. The sandpaper rolled into a cylinder should be lightly pressed against the descent plane and pulled out with a smooth movement from the grain. In this case, it is also recommended to make a smooth offset from the center to the edges.

When removing the triggers and sharpening, all manipulations were carried out with only one side of the blade. During the dressing process, the knife is also processed from the back side. Here the paper is pressed almost close to the body of the knife, but with a slight tilt towards the edge. The paper clamping force when editing is very small, but a lot of movements need to be made, trying to eliminate large scratches on a brilliant escapement that remained after sharpening.

For reference: you can also sharpen a lawn mower knife with a rivet, by analogy with a conventional manual scythe. This, however, requires a special adaptation. grandmother, as well as a specific skill. But on the other hand, with this method of sharpening, you will not need to balance the knife.

Sharpening a lawn mower knife from Lenfilm film studio

Cleaning and straightening

When the knife is removed, it must first be cleaned of adhering dirt and hardened herbal juice. The easiest way to do this is with a metal brush. The knife strip must be clean from all sides: not to a metallic sheen, but without the smallest adhering fragments.

Often, due to hard objects such as stones and chips falling into the working area, the blade deforms quite noticeably. Most blades are not straight by themselves, but the cutting edge and strip 10-15 cm away should be examined for local bumps and curvatures. This is done using a short, straight ruler.

You can straighten the blade with an ordinary hammer, with the edges of the striker slightly rounded. The knife is laid on a flat massive support (anvil), then the correct shape is given to the metal with weak blows. You need to edit the knife, starting from the edges of the curved section, gradually moving towards the center. A curved blade body is a minor issue, but it is very important that the cutting parts are straightened into one straight line. You also need to check the kickback blades, which often straighten from impact. If the blades on different arms of the knife are bent at different angles, this will impair the air flow and the cut grass will not mulch properly.

Read the same

I always sharpen knives myself. the service centers are far away, and the sharpener is nearby. In the previous relatively low-power electronic mower, it was often necessary to sharpen, otherwise the edges of the grass were shaggy. The stronger petrol one was sharpened once a season. it is evident that it takes “pressure”. The first time it was very difficult to remove the knife. it sticks to something, but the spouse only from the third call of the special. unscrewed with a key. And on electronic I was controlled with pliers without problems.

I took a spare knife at the Lawnmower, but my husband took off the old one and sharpened it, worked with it for some time, secretly hoping that the mower would be unbalanced and I would buy the newest one. nothing noticeable came out, until now I use an old one, and she’s at least 4 years old. she’s already fed up.

To a certain extent, the danger of small imbalances is a myth. Look at the knife, the news of which is sticking to it so much, but not moderately. And nothing harmful happens.

But if you remove it and sharpen it on a sharpener, then you will definitely get an imbalance, the sharpener removes the metal shamelessly.

Personally, I either sharpen with a diamond ratfil (very good for tool steel and removes a minimum). How to remove a knife from a lawn mower knife can be sharpened by analogy with the video. All. Or, if I launch a mini-drill like Dremel in very different words, it can also be sharpened very neatly. It is not necessary to completely sharpen the knife to the sharpness of the knife, the main thing is that there is an obvious angle, and not roundness.

What prevents you from checking the balance by putting the knife on the stick by the central hole. if it hangs evenly. in equilibrium, if one side pulls down. it is unbalanced and needs to be removed a little. Naturally, with this method, the knives are grinded faster. but it seems to me that buying a couple of spare ones and replacing them as you grind them off is economically more profitable than dragging each time to the service to the other end of the town and paying for sharpening (the only time I did this, they took 300 rubles from me, it was 5 years ago). How to install a 2-blade knife on a Stihl fs 55 lawn mower. Video instruction on how to change lawn mowers’ mowing heads from a reel (line) to a knife. You just need to calculate how much a knife costs and how much. a trip to the workshop.

And I don’t like sharpening with ratfil or a bar. it’s long and boring. it’s a real pity for the time. You can also meditate during other work. weeding, for example. IMHO

Vaska, I don’t sharpen knives either, but change them, but I’ll tell you about the imbalance. Putting a knife on a stick and aligning it, you will only get a static balance, dynamic in home criteria cannot be checked, but specifically it gives the most unfavorable consequences for the motor.

Rom165, I want to clarify. I just sharpen knives. but myself, with an electric sharpener. For the rest, I agree. they used the electronic mower for 6 years, and its body began to wear off (plastic). but it worked properly and was given “into good hands” after purchasing a gasoline mower in working order. how to reel the line for testing a lawn mower with the function of the Yakut knife from. Over the years, 2 knives were used alternately, and did not have time to grind off with a sharpener before discarding. And they mowed a lot. 12 acres of grass. There was an imbalance. there was not. I don’t know.

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I report. our craftsmen sharpened a knife at work, checked for imbalance, gave it and said. use I watched intently as they sharpen, in order to sharpen the knives myself later. how to install a 2-blade knife on a Stihl fs 55 lawn mower. Video instruction on how to change the mowing heads of lawn mowers from a reel (line) to a knife. I know how to use an electric grinder. And it turned out to be so easy to sharpen knives that my wife and I will not even strain

Bosch Rotak 37 LI how to change the blade on a lawn mower

Bosch Rotak 37 LI how to change the blade on a lawn mower.

Tatyana65, I have a Honda lawn mower, it is now in its fourth year. A detailed annotation on sharpening the knife is attached to it. larix wrote everything correctly. Although it is safer and more convenient to remove the knife, which, by the way, is attached with 2 bolts. Check balancing by “hanging” on a screwdriver.

Naturally, you should not, according to your ability, run into pebbles and other objects. this greatly spoils the knife.

Device and principle of operation

Choice aspects

First of all, it is worth noting that the high-quality work of a lawn mower directly depends on how much its owner looks after it, as well as how often the necessary diagnostic and repair work is carried out. over, timely replacement of consumable materials is also important, in fact, which also include belts designed for this kind of technology. So, it will not be superfluous to find out, for example, about the necessary spare parts for the mtd lawn mower.

It is worth noting that it is this important and irreplaceable element of the device that most of all requires attention and is most often replaced with a new belt. It is important that each product of this kind necessarily undergoes a kind of certification, this is what you should pay due attention to when buying a belt.

Considering the fact that lawn mowers today occupy a leading position among agricultural technology, it can be unconditionally concluded that the demand for this additional element will never fall, at least until humanity so rapidly acquires this kind of equipment for its lawn.

Actually, let’s now figure out what kind of belt you need to purchase for your “iron pet”, as well as what you should pay due attention to in the first place in order to make a correct and practical purchase. Perhaps, reading this article, you are in some bewilderment, supposedly, what is difficult in choosing a belt, for technology, given that this is a fairly simple mechanism?

The official website of the Oleo Mac chainsaw will provide you with reliable and comprehensive information about the device.

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But everything is not as simple as we would like, since it is important to pay attention to certain aspects of the choice, in fact, which will be presented to you now. so.

To begin with, you must have an idea of ​​the differences between belts designed for industrial and agricultural technology. The difference is as follows:

  • in the very construction of the belt;
  • in braid and cord materials.

In the process of choosing a belt you need, you should start from the following:

  • the brand of the belt itself;
  • its immediate dimensions.

In most cases, the greatest demand is for the original kind of wine code, but if such belt size indicators are not available, then you will need to personally measure your belt.

To do this, it is necessary to measure both the height and length and the width. Therefore, you can easily find the best option for your lawnmower. And this article will tell you how to choose a lawn mower.

How does it work

First of all, it is worth noting that a kind of transmission, which has gears in the gear direction, directly ensures a certain change in the gearbox, which has gear steps. The same applies to the continuously variable transmission, which in turn is responsible for the direct variation of the gear ratio.

It is these features that are available as a kind of transmission, designed specifically for the return of power, which is produced between certain rotating elements.

It is important that when the belt itself rotates a pulley of a driving character, and which at this moment, let’s say, is applied to the pulleys, driving and driven, then this becomes the cause of a certain friction force, which is observed precisely between the pulley, driving and special element.

At the same time, a so-called “compression” force arises, which in turn applies directly to the elements themselves in exactly the direction in which they are located, that is, in the direction where the greatest coefficient of their thickness is relative to the torque of the driving pulley.

At a time when the force of a certain compression is already “sent” to a special element, which actually fully maintains contact with the driven pulley, then the force of a kind of friction produces a formulation precisely in the part where the pulley, driven and the element are in contact.

Consequently, through this kind of mutual transmission of force, a torque is produced intended for the movement of the follower pulley. Actually, in this way, its operating power is transmitted to the belt itself. You can find out exactly where the belt is located in such units on the example of the device of the Polish rotary mower.

How to replace the belt

In fact, a lawn mower is a fairly simple tool on which the replacement or installation of certain elements can be done by you yourself and you do not have to contact the professionals. In addition, if you have at least minimal skills in the field of mechanics, then this kind of process will go smoothly and without any problems. For example, repairing Stihl mowers can be done with your own hands using seemingly ordinary things that can be found in any home.

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Probably, it is not worth reminding that the drive belt is simply an indispensable and important element of the lawn mower mechanism, namely the drive area. It is important that the belt can undergo any breakdowns, let’s say, it can be stretching of its base, or it even broke, then naturally in this case you will not be able to use your technique, at least until you replace the old belt with a new one.

How to do it? Everything is very simple and you will see for yourself. Let’s take a look at the example of replacing a belt for a bosch rotak 34 lawn mower. In turn, you can find out about how the repair of a bosch rotak 32 lawn mower, an earlier model, is going on here.

First of all, you must, from cover to cover, as they say, read the instructions for your device. Since, despite the general direct similarity between lawn mowers, the differences between them can also be quite significant, so you should not risk it, but you need to be as ready as possible for the process of replacing the belt.

After the necessary element is purchased, you can actually prepare for the replacement process. To do this, prepare a place where the “update” will take place. Since a clean surface and organization will positively affect the work itself.

It is also important to have all the tools you need to replace the belt ready, and be sure to cover the tarp, especially if you are doing indoor repairs. This simple manipulation can at least protect the floor of your house from oil and gas spills.

After that, it is necessary to remove the belt itself, which is damaged, as well as its direct guides. It is important to note that in most cases they are made from clamps of the metal direction. You will need this information in the process of selecting the necessary components for replacement.

You should remember that you need to hold the belt while removing this kind of add-on. And only after they are removed, you can remove the belt itself. It is worth noting that it is much easier to remove these guides by using an adjustable wrench in the process.

Remove them together with the bolts themselves. In addition, pay due attention to their condition, since if they are rusted, then it is more expedient to simply replace.

The next step in our work is direct replacement. To do this, you need to get the purchased belt itself from the package, as well as a kind of girdle. After that, install a new belt and its own guides and, using an adjustable wrench, simply tighten them.

Then try starting the engine of your lawn mower and observe how the belt behaves. You must remember that the belt must not catch on other elements, and pay due attention to whether it rubs against any surface. If the process goes, say, so correctly, in this case, you can safely collect the “node” back. All replacement is done, and you can get to work!

What does it consist of

Let’s consider this issue using the example of the principle of operation of the belt for the vega x pj457 180j lawn mower. And so, from two rows of rings of infinite direction, which are located parallel to each other directly in the region of the groove of the multiple so-called “elements”. They, in turn, are attached to each other in the form of a kind of ring. This installation is made in such a way that the groove itself has the opportunity, let’s say, to open precisely to the peripheral outer side.

It is important that this very element has the presence of the surface of a part of a protruding guiding character. This is necessary in order to hold a kind of ring in such a way that the special rings included in its devices simply do not separate from each other and from the groove itself.

It is worth noting that the surface called “guide” produces a formulation of a kind of pushing force in the direction of the inner side of the belt, thereby supposedly pushing one specific ring to one of the special end surfaces. This pushing component itself, which is directed to the inner region, produces a kind of attachment precisely to the lateral outer side of the ring, which is currently being pushed.

Lawn mower belt: aspects of selection and replacement

Today, most of the population uses such an indispensable and practical agricultural device as a lawn mower. Naturally, this tool has not only a high level of functionality, but also quite productive.

And it is affordable, at least for most models. Well, it happened, you became the owner of this unique technique, even managed to enjoy its work, but something went wrong and the lawn mower simply went out of order? For example, you can find out about the proper repair of Honda lawn mowers by following the link.

The problem may lie in the belt that is part of her device. It can fail or break, or, as the people say, “relax”. Therefore, if you are faced with a similar situation, then you just need to read this article.

Here you can find out what the belt consists of, how it works, and you will also be provided with information on how you can change it yourself and actually what to start from when choosing this type of purchase. So let’s get started.

I would like, I hope that this article will become for you a kind of guide regarding the operation and replacement of the belt. Here you could familiarize yourself with the main aspects of the belt device and its choice, because this unit is an indispensable assistant in large and small areas. Find out more about the mower for tall grass and uneven terrain here.

Undoubtedly, starting from the above instructions, you will be able to repair your lawn mower yourself without any problems and difficulties. Which will delight you with its work and productivity for many years.

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