We understand how to remove the clutch on the chainsaw, with examples of the most famous brands: Stihl, Husqvarna, Partner

To relieve clutch does not require disassembly of other components. The part is easily available, fixed simply, dismantling does not require special skills. But some of the nuances below are sure to know.

The fundamental device of this element on all modern chainsaws is the same. However, technical performance is different, therefore, different brands and models may require a different tool.

Бензопила CHAMPION 142. Замена ведущей звездочки.

To relieve clutch on all chainsaws, it is required:

  • Screwdriver for removing the locking ring of a lid with a gear from the shaft,
  • Depending on the model, you will need a conventional wrench for unscrewing the centrifugal mechanism (drum), or a key with two shplints like that, which is twisted by nuts on a corner grinder.
  • A stopper is required in order to fix the shaft of the flywheel (crankshaft) on which the centrifugal mechanism is twisted.

The crankshaft are stopped, fixing the piston in the cylinder using a bar of soft metal or ropes with tied nodules.

It is undesirable to use hard metal, it can damage the piston. Weak materials such as plastic can also be used. They can break, crumble and get into the windows of the cylinder, a carburetor cavity or a crankcase. Then a complete disassembly of the engine will be required to extract them from there, and these are unnecessary problems.

No puller? Then we use the rope as a stopper

The most common Stop.Stop option is a piece of rope. Unscrew the candle, the piston is brought closer to the upper dead point (VMT), a piece of rope is inserted into the candle hole and compacted. The piston is mildly fixed, while the shaft on which the coupling basket is twisted does not scroll, which allows you to promote a threaded connection.

This is how the original Stop from STIHL looks, but with the same success you can use a free option. A rope from a starter with nodules. 1-2 nodules is enough.

What is the cause of the malfunction?

Before you are interested in how to remove a disk from a corner grinder, experts recommend that you figure it out why it bite a nut to the corner grinder. It is noted that mainly this problem is observed in corner grinding machines, which have a significant size of the disk. A large disc over 18 cm is considered a large. During operation, torque is formed. Further, when the master starts cutting, a small blow occurs. In other words, the power of. If the size of the nozzle is not more than 12 cm, then this effect will be insignificant. If the disk is large, then the nut by inertia is delayed stronger. As a result, it is not possible to dismantle it in the usual way. Details on how to remove a disk from a corner grinder is described later.

How to remove clutch from a chainsaw: detailed report

The process of repairing the clutch coupling is composed of such operations:

  • Dismantle the chain headset, the airfilter shutters and the clutch itself;
  • Stop the crankshaft. For this it is enough just to unscrew the spark plug;
  • Unscrew the clutch with a special key with strong movements of software or counterclockwise (different models of saw can have either the left and right threads). Usually, a tool in order to remove the coupling is included in the completeness of chainsaws;
  • Proceed to the disconnection of the drum and stars;
  • If, when examining the clutch couplings, one or more cracked springs were found (there may be several, for example, the Husqvarna chainsaws. 3.). We need to replace the spring that failed, with a new one;
  • Collect clutch on a chainsaw, put it in place and screw it up. Do not forget that the crankshaft should still be motionless;
  • Aggregate the removed parts in the sequence, reverse disassembly;
  • Fix the coupling. Send the handle of additional braking forward, start the device and carefully remove from the inertial brake.

How to remove clutch from a chainsaw: detailed report

The process of repairing the clutch coupling is composed of such operations:

  • Dismantle the chain headset, the airfilter shutters and the clutch itself;
  • Stop the crankshaft. For this it is enough just to unscrew the spark plug;
  • Unscrew the clutch with a special key with strong movements of software or counterclockwise (different models of saw can have either the left and right threads). Usually, a tool in order to remove the coupling is included in the completeness of chainsaws;
  • Proceed to the disconnection of the drum and stars;
  • If, when examining the clutch couplings, one or more cracked springs were found (there may be several, for example, the Husqvarna chainsaws. 3.). We need to replace the spring that failed, with a new one;
  • Collect clutch on a chainsaw, put it in place and screw it up. Do not forget that the crankshaft should still be motionless;
  • Aggregate the removed parts in the sequence, reverse disassembly;
  • Fix the coupling. Send the handle of additional braking forward, start the device and carefully remove from the inertial brake.

In order to remove the clutch from the chainsaw, you should first be careful and careful so as not to damage anything superfluous.

This operation should be performed according to this algorithm:

  • Remove the saw and chain. To do this, unscrew the manual brake of the chain, pulling the handle over yourself. Then dismantle the tire, remove the pollution.
  • Remove the casing from the air filter and clutch.
  • Blok the crankshaft. This is a mandatory procedure to avoid its rotation during operation. To do this, unscrew the spark plug, fix the piston at the lower “dead” point and put the rope into the candle hole.
  • Using a special key, remove the clutch. You need to unscrew it clockwise, because it usually has left thread.
  • Replace damaged parts. Collect the clutch of the chainsaw should be in the reverse order in which the analysis was carried out.

Clutch drum is simultaneously a leading asterisk.

The position of the file when sharpening the chain of the chainsaw.

The main reason for the failure of this node is the wear of the sprocket teeth. If the drum is monolithic, then in the process the chain cuts out the star. Such a drum should be replaced. On some devices of the drum, there is a replaced crown and during the repair it is replaced, and the drum is used further while maintaining the normal state.

If it is necessary to repair the chainsaws, the question arises of how to disassemble the clutch. If you have a service center, it is better to contact specialists, but in the absence of the latter, the dismantling and repair procedure can be carried out with your own hands. This operation is simple and in the presence of appropriate tools it can be carried out by almost every person.

At the first stage, it is necessary to remove the brake lid. For this purpose, you need to pull the handle over yourself. This is done so that the tape does not contact a clutch cup. After that, the nut nuts and the chain tensioner are weakened.

The weakening of the tensioner allows you to weaken the chain and the tire. After the nuts of the brake cover are unscrewed, after which the lid is completely dismantled.

At the second stage, the guide tire and chain, the removal of pollution is carried out.

The next stage of disassembly is to turn the candle of the cylinder head. Then the piston is fixed in the cylinder. For this purpose, the crankshaft rotation is carried out and after blocking the exhaust hole, a piece of rope is lowered into the cylinder, which prevents the further movement of the piston. After the repair, the rope is pulled out for the second end outside.

The fourth stage of disassembly lies in the direct dismantling of the clutch. First you need to unscrew the nut on the clutch. It should be remembered that this one has a left thread, when it is unscrewed, you need to rotate the key clockwise. For work, the key is used, which is included in the set of chainsaw accessories.

After unscrewing the nut, you need to disassemble the clutch and inspect the drum with the leading star for wear. Then, after the inspection of the drum and sprocket, the condition of the needle bearing is examined. If necessary, worn elements are subject to replacement.

The assembly of the tool is carried out in the reverse order.

There are several nuances that you need to know when repairing the clutch:

  • On some modifications and models of the chainsaws between the clutch and a cup of the leading star there is a puck. In the case of disassembling this element, it is necessary to install the washer in the position in which it was previously. This washer can sometimes be installed between the engine and the cup.
  • Some models of oil pump drives have a special spring. She transfers rotation from the asterisk to the oil pump drive. The correct installation of this spring is very important when assembling the device. With improper installation, the oil pump stops supplying oil to lubricate the circuit. What can lead to expensive repairs.

After the repair work before using the chainsaws for the intended purpose, it is required to check the operation of the oil pump and the supply of oil to lubricate the saw chain and the mechanisms of the guide tire.

How to increase the working resource of the coupling?

At low speeds, elements with friction pads (1), which have a degree of freedom in a circular direction, are attracted to the center of the shaft with springs (2) and do not transmit rotation to the drum (3), connected to the asterisk of the driving chain. When the speed of the chainsaw motor achieves values ​​in which the centrifugal force exceeds the force of the springs, the friction segments are pressed to the inner surface of the drum and begin to twist it. As a result, the leading star begins to spin, setting the saw chain.

As you can see in the photo, the asterisk is behind the clutch.

Other chainsaws, an asterisk can be on the outside of the clutch.

To avoid unplanned repairs, the operator of a gasoline saw must adhere to certain recommendations. They will help extend the operating time of the clutch of the chain chainship and protect it from damage to the main active elements.

  • Regular lubrication of the parts of the coupling;
  • Timely cleaning of the mechanism of dust and dried oil;
  • The operation of the chainsaw only with a completely good bus and a qualitatively pointed chain;
  • Avoiding the hits of the installed cutting headset to solid metal objects.

Modern chainsaws are equipped with centrifugal clutch couplings. This means that their work entirely depends on the torque of the motor, which at a particular moment in time gives out a saw.

Its main constructive elements are:

The principle of operation is as follows. When the saw is launched, the elements that are freely move in the radial direction, with the springs are tightened to the axis of the shaft. In this case, the torque does not enter the drum, which means to the asterisk and the guide. At the moment when the centrifugal force prevails over the power potential of the springs, the adhesion elements are weakened and compressed at the inside of the drum, initiating it. Together with him, the rotational cycle passes to the asterisk and the tire-like headset itself.

The main advantage of the clutch of this type is its slippage when the cutting part is suddenly inhibition, which does not stop the engine. As a result, the “heart” drank. The engines remain intact and preservation.

The configuration of most modern chainsaws includes a clutch of the centrifugal type. The work of these mechanisms directly depends on the torque created by the engine.

In this case, the rotational force from the motor is not transmitted to the drum leading the star and the tire. Gradually, the pressure of centrifugal force increases and displaces the force created by the springs. At this moment, the clutch components lose their strength and begin to contract next to the inside of the drum. Under the influence of springs, the drum begins to spin. Moving, he transfers rotation to the leading star and the saw headset of the chainsaw.

The main plus of centrifugal clutch is its instant slip at the moment when the cutting organs begin to rotate more slowly. At the same time, the chainsaw engine itself does not lose its original speed and continues to move as smoothly as before. This allows you to reduce fuel costs and reduce the risk of burrs in the CPG of the economic saw motor.

Preparation and necessary tools

First you need to block the water fishing line for the trimmer on which the mixer “sits”. To do this, close the tap or valve.

The 2nd step of preparation is to choose a tool for a plumbing operation. Almost always, one device will not work out. Usually, in order to unscrew the rusted nut, it is required:

unscrew, chainsaw, star, leading

Focus nuts

There is a type of mixers that are attached to the sink or sink with special bolted joints. This is one or two studs, one end of which is screwed into the mixer itself.

This is carried out in industrial criteria. Reverse ends remain free. Specifically, they are inserted into the mounting holes in the plumbing device, and nuts are wound on them. In the photo below, this is clearly visible.

Like any fasteners, these “bite” to each other so that it is difficult to unscrew them. Here are installed nuts of small sizes, therefore it is better to use an open key or a pitch. The latter captures 6 faces of the head, which simplifies the unscrewing process.

As in all other versions, they also use a hammer, special waters and other methods.

Fasteners of this type are considered the most moody. Studs do not always withstand the torque from the key, so they break across. If this happens, you will have to change the mixer.

This is the only place where you can use a corner grinder. Often the nuts do not unscrew, the mixer does not go out. One thing remains. Cut the fasteners. And better and more freaks than a corner grinder, this is not done.

Carburetor, muffler and ignition coil

To remove the carburetor, you must have a 8.Head and extension cord, with which it is convenient to spin the nuts of the carburetor and air filter mounting. Before dismantling the carburetor, it is necessary to disconnect the ignition wire and the craving of the air damper from the engine control lever and remove the lever, only after that the air filter and the carburetor are removed.

The stihl 180 muffler is attached with two nuts, promoting which you need to pull it over, it will easily withdraw.

The coil is attached to two screws, you just need to spin them to remove.

unscrew, chainsaw, star, leading

How to increase the working resource of the coupling?

At low speeds, elements with friction pads (1), which have a degree of freedom in a circular direction, are attracted to the center of the shaft with springs (2) and do not transmit rotation to the drum (3), connected to the asterisk of the driving chain. When the speed of the chainsaw motor achieves values ​​in which the centrifugal force exceeds the force of the springs, the friction segments are pressed to the inner surface of the drum and begin to twist it. As a result, the leading star begins to spin, setting the saw chain.

As you can see in the photo, the asterisk is behind the clutch.

Other chainsaws, an asterisk can be on the outside of the clutch.

How To Remove A Star Fangled Nut From A Fork Steerer Tube

To avoid unplanned repairs, the operator of a gasoline saw must adhere to certain recommendations. They will help extend the operating time of the clutch of the chain chainship and protect it from damage to the main active elements.

  • Regular lubrication of the parts of the coupling;
  • Timely cleaning of the mechanism of dust and dried oil;
  • The operation of the chainsaw only with a completely good bus and a qualitatively pointed chain;
  • Avoiding the hits of the installed cutting headset to solid metal objects.

Modern chainsaws are equipped with centrifugal clutch couplings. This means that their work entirely depends on the torque of the motor, which at a particular moment in time gives out a saw.

Its main constructive elements are:

The principle of operation is as follows. When the saw is launched, the elements that are freely move in the radial direction, with the springs are tightened to the axis of the shaft. In this case, the torque does not enter the drum, which means to the asterisk and the guide. At the moment when the centrifugal force prevails over the power potential of the springs, the adhesion elements are weakened and compressed at the inside of the drum, initiating it. Together with him, the rotational cycle passes to the asterisk and the tire-like headset itself.

The main advantage of the clutch of this type is its slippage when the cutting part is suddenly inhibition, which does not stop the engine. As a result, the “heart” drank. The engines remain intact and preservation.

unscrew, chainsaw, star, leading

The configuration of most modern chainsaws includes a clutch of the centrifugal type. The work of these mechanisms directly depends on the torque created by the engine.

In this case, the rotational force from the motor is not transmitted to the drum leading the star and the tire. Gradually, the pressure of centrifugal force increases and displaces the force created by the springs. At this moment, the clutch components lose their strength and begin to contract next to the inside of the drum. Under the influence of springs, the drum begins to spin. Moving, he transfers rotation to the leading star and the saw headset of the chainsaw.

The main plus of centrifugal clutch is its instant slip at the moment when the cutting organs begin to rotate more slowly. At the same time, the chainsaw engine itself does not lose its original speed and continues to move as smoothly as before. This allows you to reduce fuel costs and reduce the risk of burrs in the CPG of the economic saw motor.

Dismantling of the clutch of the chainsaw. The principle of operation and the rules for servicing a saw tool

It is impossible to stop the engine brake on the chainships, as this can lead to overheating of this tool unit. To stop the engine, it is necessary to put the engine control into the idle mode, then turn off the engine with the stop key.

The chainsaw is driven by a two.Stroke gasoline internal combustion engine connected through the transmission system (gearbox) with a saw chain. A closed bushing-roller chain moves along the guide tire and carries sawed teeth.

The chainsaw has an automatic clutch mechanism operating on a centrifugal principle, thanks to which the chain is motionless and safe at idle.

If the load on the engine when sawing exceeds the permissible (for example, the circuit jammed), then the automatic clutch of the chainsaw will tear (or loosen to the permissible level) the gear moment on the tire, and the engine does not stupid. It is better to trust professionals.

Modern chainsaws also have a brake mechanism, which immediately stops the chain when rebuilding the tire towards the sawer, a chain break and other emergency situations. That is why Oleo-Mac chainsaws are so popular today.

In some models, the tire is attached to the gearbox in such a way that it allows it to fix it in a horizontal or vertical position, which makes it possible to make cuts, respectively, in a horizontal or vertical plane.

Many models of the chainsaw, especially originally designed for use of forest roller, have the ability to connect remote hydraulic engineering (the so.Called “hydroclin”), which is an executive hydromechanism.

The injection of the working fluid (oil) into hydromechanism is carried out by a chainsaw.

Chain saws with an electric motor are widely distributed, for example, a dummy (a hand tool for sample of deaf narrow and deep nests) is only with an electric drive. In general, having a certain skill, you can make a lot of useful things from a chainsaw.

Read more about Husqvarna chainsaw problems.

Cathedral disassembly: Procedure

We use a hexagonal key for 6 or a star of the same diameter.

Remove the air filter lid, clutch cover. Unscrew the spark plug with a candle key, remove the piston into the lower dead point. We take the rope and pushes it into the candle hole, I try to ensure that the piston remains in the NMT, thereby jamming the piston in this position.

The attached chainsaw we unscrew the clutch clockwise. On the clutch there is a nut at 13. Unscrew it. We unscrew the clutch, remove the basket with the leading asterisk. Change the clutch. Do not forget to put the washers in place. With force we tighten the clutch by hand until it stops counterclockwise.

Next, the brake handle is translated forward, start the engine and remove it from the brake. The clutch is tightened using the engine strength.

The work of the chainsaw

It is impossible to stop the engine brake on the chainships, as this can lead to overheating of this tool unit.

To stop the engine, it is necessary to put the engine control into the idle mode, then turn off the engine with the stop key. All Makita chain models are equipped with an automatic inertial chain brake.

The design of the emergency inertial brake of the quapia is designed for an almost instant stop of the chain movement. The emergency brake of the chain is activated by two methods.

Activation of the inertial brake manually using a lever in front of the upper handle. It is used only when starting the tool, in order to security of the operator or when checking its performance before the operation of the tool.

unscrew, chainsaw, star, leading

The transmission of the torque from the engine shaft to the leading sprocket of the chain occurs through the body clutch mechanism of the centrifugal type. This means that if you run the saw engine without an activated brake, then at the time of starting the engine the circuit will move along the guide tire.

This can lead to an injury to the operator, especially if the operator is inexperienced.

Activation of the emergency inertial brake of the backup automatically. It occurs as a result of an emergency situation (uncontrolled dropping of the saw towards the operator when touched the upper part by the cutting canvas).In no case should the saw with an activated brake should be operated. The emergency brake stops the movement of the chain, but does not stop the engine operation.

The clutch cup of the leading sprocket with the brake mechanism is blocked when the emergency brake is activated. If at the same time the gas key is not released, then the details of the centrifugal clutch mechanism will be rubbed on the clutch cup.

Due to the friction arising, the entire drive and brake mechanism will be heavily heated in a short period of time, thereby melting the corps parts in which it is located.

Therefore, the operating instructions indicate that in no case do not operate a saw with an activated brake.

Forcibly activate the circuit brake only when starting the engine and cases of checking the brake before operation.

In all cases of activation of the brake, it is necessary to immediately transfer the operation of the saw engine into idle mode. In the idle speed mode, centrifugal force is not enough to activate the clutch mechanism.

It is always necessary to check the position of the inertial brake before the operation of the saw.If you activate the brake of the circuit on the already started saw engine and at the same time set the gas key in the maximum engine speed, then the engine power is enough to crank the leading sprocket of the circuit closed with the brake mechanism.

But at the time of the emergency (uncontrolled dropping of the saw), the operator must stop using the tool. In such cases, the efforts of the emergency brake is enough to stop the movement of the circuit. If you skip or not notice the operation of the brake, then damage to the tool indicated in your letter will occur.

Service

Option one: one to one, use one chain until it is worn out at zero, after which the leading star changes when installing a new chain. This option is inconvenient in that with intensive work it is difficult to monitor the state of one chain, it must be edited in time, interrupting the work and distracting.

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