Why vibrates a chainsaw during operation. Wet contacts

The causes of breakdowns of gasoline and electric trimmers

Trammer for grass, both electric and with an internal combustion engine (ICE), is an indispensable tool in the summer and autumn period for owners of cottages and private houses. With its help, weeds, small shrubs are easily removed and the lawn is trimmed. But, like any technique, trimmers for grass fail at the most inopportune moment. To eliminate the malfunctions with your own hands, the user of this technique first needs to determine the reason for their appearance.

In the lawn mower and an electric trimmer for grass, if you do not consider breakdowns associated with the bar and the mowing head, the malfunctions mainly happen in the engine area.

Damage of gasoline trimmers

Typical breakdowns of a gasoline trimmer for grass, which are most often faced with the owners of this unit, are as follows:

• engine breakdown;
• problems with the carburetor;
• problems with the supply of fuel;
• muffler malfunction;
• gearal breakdown;
• The starter broke;
• Air filter problems;
• Broken a buckshot on a gas tank.

Malfunctions of electric trimmers

Since the device of an electric coser is much easier than a motirmer, then there are few reasons for its failure.

It should be noted that the elimination of some of them is best entrusted to the specialist.

Basically, the trimmer for the grass ceases to work normally in the following cases:

• Electric cable malfunction;
• The control button is faulty;
• burned engine winding;
• Contact joints break on the engine.

Why is the gasoline trimmer not starting for the grass

The reasons why the gasoline trimmer for the grass stopped starting is different, therefore, a phased diagnosis of the apparatus is required.

Fuel tank (fuel quality)

Remember that always before starting the unit, a check of the presence and quality of fuel is required. In this case, you should not be greedy and save, as well as “clever” about the amount of oil added. Everything must be done according to the management attached to the apparatus, since when the piston group fails, its replacement will cost about 70% of the total cost of the trimmer for the grass. Pour fuel due to the fact that you will fully conside it when performing work. After a while, the gasoline remaining in the tank loses its properties and can harm the engine. Therefore, do not prepare the mixture for the future and in large quantities. If the lawn mower starts poorly, try to drain the “old” fuel from the tank, and season it with a freshly prepared mixture.

Important! To refuel the device with fuel, the origin of which is unknown, fraught with negative consequences. Gasoline should be of high quality, bought at a gas station, and its brand should be not lower than AI-95.

Candle and candle channel

So, you changed the fuel, but nothing has changed, and the trimmer for the grass still does not start. In this case, it is worth checking the candle channel: whether it throws it with a combustible mixture. Often users transfer the air damper to the “OFF” position when starting, and when the engine started, they do not transfer it to the “ON” position, after which it stalls. Further, an attempt to start the internal combustion engine to again leads to the fact that it floods the candle with gasoline, and the start becomes impossible. To diagnose and eliminate the possible problem in this node, do the following.

• It is necessary to unscrew the spark plug, wipe it well and dry it. When installing a candle in the ICE cylinder, it should be dry.
• Draw from the combustion chamber the fuel accumulated there. This is done through the hole from which you twisted the candle.
• In the presence of soot on the electrodes of the candle, it must be removed either with a thin file or a nail file.
• Do not forget to put the gap between its electrodes before installing the parts in place. The gap on the candle should be 1 mm. As a probe to check the gap, you can use a coin.
• Next, collect the block, read the start instructions and try to start the engine again.

If the engine does not start, then you will need to check the spark. For this:

• unscrew the candle;
• put on it a cap of a high.voltage wire;
• Touch its metal part to the cylinder body (to provide contact, you can insert a tubular key) as shown in the figure below;
• pull the launch cord so that several engine speeds occur.

Normally, with each piston roll between the electrodes, the candle should slip a spark. If there is a spark, then the reason that the internal combustion engine is not launched should be sought in other nodes of the device.

For a better understanding of the process, how to test the candle for the presence of a spark, you can use this video where the check is shown by the example of the Lawn Mushiel “Soyuz”.

If there is no spark, then in the beginning check the cable connecting the candle to the coil. perhaps the reason is in it. You can call it with a tester. In case of detection of the rupture of the chain, a high.voltage wire will require a replacement.

Also the reason that the spark has disappeared is a malfunction of the ignition coil (magneto). The figure below shows what the coil (magneto) looks like from the gasoline trimmer for Patriot grass (Patriot).

To exclude the malfunction, it will be necessary to use a tester to check the Magneto trimmer for the grass, namely, its primary and secondary winding. On the primary winding, the resistance should be in the range from 0.4 to 2.0 Ohms. If the device shows 0. this means that there is a short circuit in the winding, and if infinity is a clear sign of a chain break. The resistance on the secondary winding should be in the range from 6 to 8 kOhm.

On some coils, it can reach the value of 15 kOhm.

Air filter

If your lawn mower does not start well or stalls immediately after starting, you should pay attention to the air filter, since it can be clogged, as a result of which the air does not enter the combustion chamber, and fuel ignition does not occur. To check if the filter is the case, remove it and try to start the engine. If he earned, then the reason was found. The filter needs to be replaced or rinse well and dry before installation. In the case when you find the oil in an air filter, it must be washed with gasoline, squeezed well and dry at least 2 hours before installing in place.

If the unit does not start with an air filter, it is still recommended to check the fuel filter.

Fuel filter

This filter cleans fuel of possible pollution. If it is scored, then gasoline does not enter the cylinder, and, accordingly, the unit does not work or stalls after starting. The fuel filter is located at the end of the fence hose, which is located inside the fuel tank. To get to the filter, it is necessary to extract a cork with tubes emerging from it.

When extracting traffic jams, a fence hose can disconnect and stay in a tank. It is extracted with a tweezer.

Next, remove the old fuel filter from the hose and put on it a new, pre.acquired. You can also clean the fuel filter if you do not have new. The filter must be fixed on the hose using a spring latch.

Install the fence tube on the cork and insert the last into the tank.

Elimination of a malfunction of the carburetor of the chainsaw

However, a violation of fixation of adjusting screws sometimes happens.

• Strong wear of the engine (piston). In this case, it is necessary to take a greater extent to fix the engine, however, the carburetor adjustment can improve the functionality of the saw for a certain amount of time.
• Blockage in the carburetor due to damage to the air filter, the use of poor quality gasoline and the formation of scale. In such a situation, in addition to adjusting the carburetor, it will also be needed to flush.
• Strong vibration of saw or damage to the protective cover. This is extremely rare, but there are still cases.

Signs that indicate the need to adjust the carburetor of the chainsaw:

• The engine either does not start, or starts up and immediately stalls. This is due to the use of poor fuel mixture.
• A significant increase in fuel consumption and an increase in exhaust volume. the amount of exhaust gases suggests that the fuel does not completely burn out. The reason for this can be oversatuity of the fuel.

The carburetor adjustment scheme for different models of the chainsaws is different and described in the operating instructions. However, the general principle remains the same: it is necessary to change the quantity and quality of the fuel mixture supplied to the engine cylinder.

• “L”. LOW, to configure low speeds
• “H”. High, to configure the upper revolutions
• “T” (“LA”, “S”). to configure the idle stroke (the models that have only one screw have exactly the “T” screw)

When adjusting the carburetor of the chainsaw, the following rules should be followed:

• Make sure that the cutting chain of saws is directed in the opposite side of you
• Put the saw on a stable even surface, the cutting part should not touch any objects.

We offer you to familiarize yourself with how black pepper peppers are grown

Please note: the instructions indicate the exact angles of rotation of the adjusting screws. Accurate compliance with the instructions of the instructions will avoid engine damage.

The process of adjusting the carburetor itself includes two points: basic (with a non.working engine) and final (with a heated engine).

Now, by turning the idle screw (t, la, s) counterclockwise, configure the minimum number of revolutions in which the engine operation is stable. The chain should not move. If the engine stops at idle, then accordingly turn the idle screw clockwise. If the chain moves, turn the screw counterclockwise.

For the final of the tuning of the chain saw carburetor, we check the engine for acceleration and maximum speed.

Check acceleration

We smoothly press the accelerator and watch how quickly the engine is gaining momentum from idle to maximum power. If the engine is gaining momentum slowly, therefore it is necessary to weaken the screw L (low revolutions), turning it a little counterclockwise (not more than 1/8 turnover).

As mentioned earlier, the maximum speed is tuned using the screw H, the turns increase when it is twisted clockwise, decrease when turning against the hourly.

The highest rotation speed of gasoline chain saws is in the range of 11,500. 15,000 revolutions per minute, depending on the model. Higher speed is dangerous for the engine, which will not allow it to start. Maximum turns can be determined by interruptions in the ignition. If any, turn the screw h counterclockwise.

As soon as we configured the acceleration and maximum speed, we again check the operation of the engine at idle. We will understand that we adjusted the carburetor correctly if:

If at least one of these conditions is not respected, adjustment should be re.carried out (excluding the basic stage).

Do not underestimate the breakdown of this node of the chainsaw. If the muffler closes, the saw will lose power and of course it will not start. If the muffler is collapsible, then we disassemble it, conduct an inspection and remove the entire pile. In some models, the muffler will have to be unscrewed, after washing the unlimited muffler should be dried with a hairdryer.

Please note: the carcass contains carcinogens that are dangerous to human health, dry cleaning is unacceptable, since it can lead to inhalation of these harmful substances.

When we remove the silencer, the outlet of the motor is plugged with a clean rag. The reasons why the muffler might clog is:

• Using improper fuel mixture (too much oil)
• The use of improper oil (oil, not for two.stroke engines or low.quality oil)

The reason for the malfunction of the chainsaw: wear of the rubber cuff on the piston of the accelerator pump in the carburetor (fuel accelerator). This leads to an air pump with an accelerator pump and the chief jacket supplies a lined fuel-air mixture (there is little gasoline in the mixture) and the chainsaws first works at increased speeds, and then stalls and stalls in the mixture. This happens after 2-3 years of operation and it usually happens in the hot summer months.

Assembly after eliminating the malfunction of the chainsaw (after eliminating the malfunction of the carburetor of the chainsaw) is carried out in the reverse order of disassembly. When assembling the throttle, before tightening the screw, the throttle itself must be correctly set so that it does not jam, and the thread of the screw of the throttle to the axis should be degreased and spread with a special threaded sealant (sold in small tubes, red, liquid) or spilled with passathers, Because if this bolt is getting out during operation, it gets into the cylinder straight) and the repair or replacement of the piston cannot be avoided). So we examined the elimination of this malfunction of the chainsaw.

Why is a chainsaw is not gaining momentum?

Launching is a complex multi.level process in which almost all the system life support systems are involved. That is why the fact that Motopila loses turns, turns on with interruptions and confidently feels exclusively at idle, it is worth considering from different sides.

• A faulty motor. its motorcycle resource could be developed, and the piston rings and the cylinder. to worry, deform, or even succumb to corrosion;
• The fault of the ignition or the coil itself is out of order. as a result of this, the spark necessary for ignition of the fuel mixture is not formed;
• The carburetor screws are urged, as well as a number of reasons that could disable it.

The gaspile ignition system does not work

One of the reasons for the malfunction of the chainsaw is problems in the ignition system.

To check this assumption, you need to turn off the candle from the electric wire and unscrew it using a special key. If moisture is noticed on it when examining the candle, it is possible that the carburetor is incorrectly adjusted and there is more fuel in the chainsaw engine than expected.

If moisture is noticed on the spark plug, it must be wiped and dry. Then the supply of gasoline is overlapped and an attempt is made to launch a chainsaw. After removing excess gasoline, the candle is installed in place and the engine starts.

If the chainsaw is still not starting, then the problem may be in the haul, which is formed on the spark plug.

In this case, it is necessary to clean the candle and electrodes from soot and check the fuel and the quality of the oil in fuel. You should also check whether the chainsaw carburerator is correctly adjusted.

Basil often does not work due to damage to the high-voltage cable.

To check, you need to see if the spark is slipping. If you connect the spark plug with the cylinder and turn on the engine, then the spark should be seen. If there is no spark, you have to repair or replace an electric cable.

The algorithm for calibration and safety precautions when eliminating the malfunctions of the carburetor of the chainsaw

Calibration or accurate adjustment of the carburetor should be carried out strictly as the manufacturer of the chainsaw itself recommends. Often this procedure has already been done at the assembly workshop stage. However, the repair of the chainsaws sometimes includes the tuning of the carburetor. This is due to its incorrect work for technical reasons, the failure of the settings, etc.

Accurate adjustment is performed using three bolts:

• Bolt “L” regulates fuel supply at low speeds;
• Bolt “H” regulates the highest fuel supply to the engine;
• Bolt “T” regulates the fuel supply in idle.

There are two types of carburetor settings:

First, the bolts “h” and “l”, which regulate the supply of the fuel mixture at large and low speeds, respectively, are twisted to the stop counterclockwise. Then they turn them for one and a half turning clockwise. It is advisable, before the start of the procedure, to mark the initial position of these bolts with a pencil or felt.tip pen, in order to subsequently return to the position in which they were before if there are problems with the adjustment. The fact is that with an unskilled approach to adjustment, there is an opportunity to finally kill the engine.

Further adjustment takes place on the engine heated to the desired temperature. It is left for working for 10 minutes. Then the accurate setting up the idle speed adjustment is already carried out. It is turned until the engine (its revolutions) is reached the most minimal values. The engine should work stably, while the chain should remain in place (do not rotate).

Then you should check how quickly the speed is gaining. To do this, they slowly turn a low.speed bolt for another eighth turn. The maximum possible revolutions can be set using a tachometer and adjusting the bolt “h”. Next, you should once again check the carburetor operation at idle.

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Replacing the stars

The most common reason for the appearance of a malfunction in this element is to jam the chain due to its distortion or significant wear of the chainsaw star itself. When any signs of these deviations appear, it is necessary to carefully examine the plane and teeth of the gear element of the drive, paying attention to the depth of demolition (it should not exceed 0.5 mm).

If severe wear or traces of deformation on the stars case is detected, it is sometimes possible to repair it, and with a serious malfunction, a complete replacement is required. Regardless of the nature of the damage detected, before the repair, you first need to remove the star from the chainsaw, that is, completely free it from all retaining fasteners.

note! To obtain access to the asterisk, you will have to disassemble the entire drive block of the working mechanism, including the air filter, clutch basket and much more.

The adhesion of most chainsaws is equally located. For disassembly, you should use the candle key, which usually comes with a chainsaw, a clutch with a carrier and a stop for a piston.

First unscrew and remove the tire, remove the chain. Remove the top cover to access the candle, twist it and install the piston stopper. Often a rope or lace is used for a stopper, but experts do not advise doing this. It is better to use a special stop when relieving clutch. Remove the side cover, unscrew the clutch clutch (clockwise!) and get to the asterisk.

In another version, the starter is unscrewed and the protection is removed to hold the knot on the back that is scrolled. The order of complete dismantling of the main parts of the motorcycle is well presented in the video

All removed details must be put in one place so that they are not lost. You can take a photo of the chainsaw nodes, so that in the future after the repair, quickly assemble the tool in the reverse order.

DIY carburetor repair

The fact that the carburetor needs to be repaired can be determined by the following signs: unstable operation of the motor, excess fuel, engine power, clap.

Huter chainsaw is not considered a difficult tool in disassembly, therefore, in the presence of the initial skills of a locksmith. mechanics, improvised tools and desires, to replace the details yourself will not be difficult.

What can be replaced in a carburetor without addressing a specialist:

• Fuel filter (flushing or replacement). when jerking the engine and sneezing;
• The needle valve. if the needle jams in the valve or floods;
• The diaphragm of the fuel pump. wear;
• The gasket under the lid of the main camera is not tight.
• disassemble and rinse the carburetor, when clogged with an air filter;
• Twist the bolts, with their loss of fixation due to intensive vibration of the chainsaw.

Walbro produces expanded repair kits for self.replacement, including, almost all the parts of the carburetor (fuel inlets, rocking axle, rolling axis, filter nets, membrane).

An important recommendation to avoid a malfunction of the carburetor: do not leave the fuel mixture, in an invalid saw for more than 12 hours, such negligence can lead to blockage of the channels.

Problems with the chain of chainsaw

In addition to problems with the engine, the chainsaws may have problems in work due to a malfunction of the cutting (sawing) node consisting of an oil pump, tire and saw.

Oil does not enter the tire

Usually, if the oil does not enter the chain of the chainsaw, you need to check the channels along which the oil is supplied to the tire, and clean them of pollution. If the previous actions did not find the cause of the problem, then you will have to check the oil pump. For this you need:

• remove part of the chainsaw casing;
• Remove the coupling;
• Up the 3 screw, remove the lid hiding the pump;
• Get to the gear of the worm mechanism that rotates the pump shaft.

If the thread is worn out on it, then the shaft does not rotate, the pump does not work, the circuit is not lubricated. Worn gear needs to be replaced. You can also pull out the oil pump itself and manually try to pump oil through it. If it does not pump, the pump should be replaced.

Do not forget to get an oil filter from the tank and clean it if you need it.

Also, the lack of lubrication can be due to its leakage. It should be checked how hermetically connected the tubes coming from the oil pump. If the tightness is disturbed, the tubes change to new.

The chain breaks

If the chain was torn during the operation of the chainsaw, then this could happen when it hits a solid object, for example, on a nail. If the chain is constantly tearing, then the reasons may be the following.

• Low quality of metal from which a saw chain is made. It is necessary to buy saws for gas tanks from famous brands.
• Overheating of the chain due to poor lubrication. As a result, the saw overheats, the properties of the metal change, and it breaks under load. It is required to check the entire lubrication system of the chainsaw (considered above).

You can also learn about the causes of frequent cliffs of the chain from this video.

The chain does not spin

This nuisance often haunts inexperienced chainsaw owners. They forget to remove the brake after starting the engine. As a result, the chain does not spin, the brake system is overheated, and the adhesion mechanism fails. The problem is solved by removing the saw from the brake. If the clutch does not “burn”, you will notice the rotation of the chain. Otherwise, you will need to replace the clutch mechanism.

The chain is quickly stupid

Basically, the reason that the chain is rapidly stupid is the poor quality of the saw. Trying to save on buying branded chains, owners of chainsaws buy saws of unknown manufacturers, or for inexperience acquire fakes for well.known brands. It is best to buy a cutting element for a fenzoresis in branded stores. The STIHL (stihl) saw chains are very popular among owners of this technique.

The chain does not stop

If when working with a chainsaw, you noticed that the saw chain does not stop at the right time, then this breakdown may have 2 options.

• The brake tape was polluted. When the saw, dirt, sawdust, dust, etc. can fall under the tape.D. As a result, the brake mechanism is blocked, and the circuit does not stop when the gas is discharged. The problem of cleaning this node is eliminated.
• The brake tape has worn out. It is necessary to replace this element of the brake system.

The chain wedges

This happens when a leading or led star wears out. The chain usually starts to wedge under load. But without a load, the saw can rotate. The photo below shows a worn leading asterisk of a chainsaw.

The following photo shows that the reason why the chain is wedges should be sought in the place of location of the driven star.

But what to do if the chainsaw was completely jammed, and all attempts to pull the starter are unsuccessful? Such a malfunction is sometimes found on Chinese.made chainsaws. It is caused by the bolts unscrewed from the vibration, with which the engine is screwed to the plastic casing of the unit. These bolts are located right under the flywheel (magneto). The photo below the arrows shows the location of the problem bolts.

Turning away, they begin to rub on the flywheel and can completely jam the chainsaw. The following photo shows a flywheel with existing scuffs from bolts.

To eliminate the malfunction, you will need to remove the flywheel from the engine shaft and tighten the bolts.

The chainsaw saws crookedly

This problem may arise if the chain is dull or impudently sharpened. This is more related to new chainsaws. But if the tire has worn out, then even after replacing the chain you will notice that the saw leads to the side. Tire wear can be easily determined if you put it on an even table and attach a square to it, as shown in the next photo.

In this case, you can notice that there is a gap of about 2 mm between the tire and the corner. It is because of such a unilateral wear of the tire of the chainsaw saws crooked. The problem is solved only by replacing the tire with a new.

Important: to extend the service life of the chainsaw tire, it needs to be removed from time to time and turn over. Thanks to this, the tire will wear out more evenly and will not cause a skew of the chain.

Why the chainsaws are heated

The new chainsaw is warming up, because all the details of the piston group have not yet been lost. Therefore, the unit must undergo a running.in, during which the engine cannot be overheated. If the unit is already driven, then overheating of the engine can cause later ignition, of course, provided that the combustible mixture was prepared without violation of proportions. To eliminate the problem, you will need to adjust the ignition system of the device.

Many owners of chainsaws are faced with a problem such as flowing oil from under the unit. Most often, oil flows due to damage to the oil hose connected to the oil pump. The photo below shows exactly the case when the end of the hose exploded and does not dress tightly on the pump pipe.

But in order to get to this place, you need to remove the clutch mechanism from the shaft. In some models, the oil can flow at the junction of the oil pump with the oil tank hose (the photo is indicated by the arrow).

To eliminate the leakage of the lubricant, you need to stretch this hose from the landing site. To do this, you can use the pliers, pulling it for its outer part. At the end of the hose you will see a rubber cork, which is the cause of oil flowing. This cork must be wiped well to remove the remaining oils, after which its seat must be compacted with something. You can use a car sealant or fum tape, as shown in the following photo.

Next, insert the hose into the hole, set the plug in place and seal it using a flat screwdriver. The operation to eliminate the leakage of the oil can be considered performed on this.

Types of sounds

Powerful chainsaw options, especially not equipped with effective silencers, can give sound power characterized by values ​​of about 120 decibels. This is 32 times higher than the level, the sounds of which are considered irritably loud. According to experts in the field of engineering design, a mark of 70 dB has been accepted for this level.

However, against the background of the noise of an engine that is considered normal, ringing, rattling, creaking or knocking noises can be clearly heard, most likely related to elements that should not make sounds with normal work.

Sources of sounds in the saw and their finding

First of all, it is necessary to divide the sources into external, internal and intermediate.

Most common in practice. They are easy to localize and the easiest to eliminate. First of all, the tire and chain should be removed. After that, start a saw. As a rule, more than 80% of the problems at this stage disappear: sliding the chain along the tire, the roar of links on the asterisk. all these processes depending on the settings of the tension and the condition of the elements can generate noise of various nature.

The most dangerous and “expensive” in terms of elimination. However, they are less common. Can be caused by a poorly mixture of gasoline and oil, wear of parts, breakdowns. As a rule, bearings are the first to suffer. However, before making the conclusion that in this particular case there is a problem with the internal elements of the saw and independently disassemble or carry it for repairs, which in one and in the other case is almost equivalent to a large amount expended (many, having dismantled the device along the screws, by Some parts unintentionally spoil the action, the most suffering for oil seals and other rubber or plastic parts, and then still turn to professionals). You should pay attention to another group of reasons:

In fact. The clutch also wears out, and this happens quickly enough (at least relative to the cylinder-piston group and bearings, if the saw is high-quality), there are many moving elements in it, it is located on its own and it thunders and rings quite strongly. Even in a new state.

Governing bodies and launching gasoline.sized saws

Some modern gasoline saws provide for the possibility of equipping with special handles that provide hands and prevent icing when working with a saw in the cold season. Such designs do not allow you to freeze your hands and thereby create more comfortable and safe working conditions to the operator. In addition, fingering heating reduces the likelihood of a “vibrational disease”. The handles are heated by film heating elements

Electricity is produced by a special generator during the operation of the saw engine. If necessary, the operator can activate the heating using the circuit breaker. The design of the heating of the handles is reliable, unpretentious and does not require maintenance.

Modern gasoline saws have a convenient placement of the starting control elements, work and stopping the saw engine. The classical control system is separate (rice. 11, a) ’, separately lever control of the damper and the ignition switch. But in the designs of modern STIHL gasoline.moraine saws, a more convenient control system with a combined lever is used. when one lever is responsible for cold and hot launch, and for stopping the saw engine (rice. 11, b).

To solve the problem of the cold start of the engine, especially in the winter season, many modern gasoline.motral saws use special devices or additional technical solutions in their design, which allow us to simplify the launch.

On many gasoline instruments to facilitate the launch of a cold engine, a hand.fuel pump (primer) is installed

In models without a manual fuel pump, filling the carburetor camera with fuel occurs by a carburetor pump when the engine is scrolling with a starter.

To facilitate the scroll of the engine when starting on a number of models of powerful gasoline.moraine saws, a decompression valve is installed

Thanks to the decompression valve, the operator spends significantly less effort on scrolling the crankshaft and, in addition, the load on the parts of the starter is noticeably reduced and the crankshaft itself is more uniformly unwound. The decompression valve automatically closes when the pressure rises in the engine cylinder during the first flashes of the fuel mixture.

Earlier in the gasoline instrument, contact systems of ignition were used, which brought operators a lot of trouble with adjusting and cleaning mechanical contacts. In addition, the contact systems were not reliable and were afraid of moisture and dust.

The first models of gasoline-moraine saws with electronic ignition systems appeared in the 1960s, and by the beginning of the 80s all leading manufacturers of a gasoline instrument switched to electronic contactless ignition systems.

Contactive electronic systems are reliable and durable, better protected from moisture and dust, non.insist and settings. And the modern microprocessor ignition system provides effective operation at different engine speeds due to the automatic change in the ignition force angle. It also facilitates the start of the engine and has a speed limiter that allows you to make more comfortable operation and limits the maximum engine speed. And earlier the ignition system began to work immediately after the start of stretching the starter cord, which caused painful blows to the operator’s hands.

There are more and more chainsaws equipped not only by the microprocessor ignition system, but also by the intellectual control system. STIHL has such a system called M-Tronic

It gives the user a number of undeniable advantages: a simple launch from one position of the air damper (there is no longer the difference between the “cold” and “warm” launch), the carburetor has no adjustment screws. now the electronics itself finds the optimal fuel supply under any conditions, better the dynamics of the transition to working speeds, optimal power.

The control device receives signals from the speed sensors (it is the magnet of the flywheel) and the temperature, then it processes them according to the algorithm staged in it, and the command is issued during the opening of the magnetic valve, on which the fuel supply depends. There is also a diagnostic connector, thanks to which you can test the saw, configure and consider all the necessary information.

The control device has a power.dependent memory, in which they include information about the latest system settings, and at the next time this information allows you to quickly adjust the carburetor to display the engine to the optimal operating mode. The program of the control device, receiving information from sensors, can adapt to changes in fuel characteristics, atmospheric pressure (for example, due to work at a different height relative to sea level), to the degree of air filter pollution, etc. D. This also allows you to reduce fuel consumption.

The designs of modern gasoline.somership uses convenient lamb handles. Simplime for dense fixation in the hand, even in winter gloves in size.

Devices for safe operation with gasoline saws

The design of modern gasoline.somber saws allows you to protect the operator from the accidental touch of a person to heated details. the cylinder and muffler (the muffler temperature during operation of the chainsaw reaches the approx. 200 degrees). The engine cylinder is closed by the casing of the case, and the muffler is separated from the front handle. High.voltage elements of the ignition system are also completely isolated.

The profession of a forest roller is one of the most dangerous professions; If we consider all production injuries in the cutting area, then most of them falls on damage to the legs and arms obtained by the saw chain. The use of modern (safer and more ergonomic) gasoline instrument and special equipment reduces the likelihood of serious injuries.

All modern gasoline saws are equipped. Thus, it is impossible to accidentally press the gas trigger. the chain remains motionless, which means safe.

All modern gasoline saws are equipped with a brake of the chain, the speed of which is tenths of a second.

Triggering the brake of the quapia can be contact and inertial.

Contact operation comes from the activation of the chain brake with the wrist of the hand when the saw begins to move up from the reverse blow.

Chain brake is the basis of the security of the chainsaw. That is why all STIHL saws are equipped with a chain brake Stihl Quickstop. By clicking on the front shield of hand protection, the operator activates the chain brake manually, and the chain stops. Strong reverse recoil provides automatic operation of the brake regardless of its position. in this case, the operation occurs without contact with the hand. For a fraction of a second, the chain stops completely

A number of models of gasoline.somership saws for greater safety are equipped with an additional system of turning on the chain brake when the gas lever is released. Stihl Quickstop Super allows you to protect the operator when working when it is often necessary to interrupt and transfer the saw from place to place or put it to the side.

This system makes it possible to activate the brake immediately after releasing the rear handle, that is, the chain stops not only after a strong return or activation of the front shield, but also when the hand is removed from the rear handle.

What is the main advantage? Quickstop Superpa6ot in any position, without additional levers and handles.

Когда условия требуют быстрых движений работающей пилой, например при обрезке сучьев, эта опция может быть очень кстати. At the same time, it is not required to control anything specially-the lock of the gas lever is simultaneously and the lever of activation of the brake of the quapi.

The chain brake is activated itself automatically and during transportation. no additional manipulations are required.

The release of the brake: pressing the gas lever on the stopper of the clutch drum, and the chain may rotate.

Brake activation: you just need to release the rear handle, and the brake tape automatically compresses the clutch drum, the circuit stops in less than a second.

One of the most dangerous incidents when working with the tool is a reverse blow. A reverse blow is a sharp and strong rebound of the working tool towards the operator, the reverse blow occurs if, with a moving chain, the end of the saw tire of the upper quarter (in the sector from 12 to 3 hours) occurs with wood.

Most often the reverse blow occurs: when working with the end of the saw tire; cutting the end of the tire; when entering a saw into the existing cut; When cutting out several logs, cutting of branches, etc. D. The only effective way to avoid serious injuries with a reverse impact is a sharp stop of a moving circuit before the saw touches the operator.

When preparing a gasoline morale for work, as well as when checking a saw after maintenance and repair, it is necessary to conduct control tests of the saw brake work. If the brake is inoperative, then it is strictly prohibited to use such a saw.

The inertial inclusion of the backup brake occurs due to the inertial forces that occur during a sharp rebound of the tool back. under the influence of inertia forces, the brake mechanism is triggered, which delays the brake tape on the clutch couplings and stops the chain.

In addition, there are a number of constructive solutions to reduce the likelihood of a reverse blow. For example, saw chains with a reduced tendency to rebound, which are characterized by a low profile and a special geometry of links. Another example is the geometry of the end of the tire: the smaller its radius, the lower the tendency to return.

With the clamping of a moving circuit, a saw can be delayed if the clip occurs when the upper side of the tire, the direction of movement of the saw. to the operator, if the lower. in the opposite direction. In any case, a loss of control over the tool and serious injury of the operator may occur.

Fixing the brake of the quapi

The mechanism may not work due to the clogging of the space under the protective lid or the work of the brake tape. In the first case, cleaning is needed, in the second. the replacement of the part.

Many parts of the saw are subject to natural increased wear, so it is necessary to have the following details in stock: a saw chain, its guide tire, asterisk, composite anti.vibration protection.

How to increase the life of a chainsaw

You need to have a couple of tires in stock and at least four chains. For a uniform wear process, the chain must be turned into 180 o through three hours of work, after the same period of time, the chain should be replaced with another.

Timely cleaning of the tool guarantees the absence of a blockage of various holes, which can lead to difficulty or even stopping the supply of the fuel mixture, which will affect the working condition of the chainsaw.

If you are not confident in your abilities and are afraid to ruin the unit, then it is better to contact professionals. They, by virtue of their experience, will always be able to correctly diagnose the problem and qualitatively correct the problems in your chainsaw.