How To Unscrew The Clutch On A Chainsaw

How to remove a clutch from a chainsaw: a detailed report

The clutch repair process consists of the following operations:

  • Dismantle the chain set, air filter flaps and the clutch itself;
  • Stops the crankshaft. just unscrew the ignition urine;
  • Unscrew the clutch with a special key with strong movements clockwise or counterclockwise (in different models, dust can be both left and right thread). Usually, a tool for removing the clutch is included in the delivery of chainsaws;
  • Go to disconnecting the drum and sprocket;
  • If, when inspecting the clutch, one or more cracked springs were found (there may be several of them, for example, in the Husqvarna chainsaw. 3 units). you need to replace the broken spring with a new one;
  • Assemble the clutch on the chainsaw, put it in place and screw it in. Remember that the crankshaft must still be motionless;
  • Assemble the removed parts on dust in the reverse order of disassembly;
  • Lock the clutch. move the additional brake handle forward, start the device and carefully remove it from the inertial brake.

Chainsaw clutch replacement and repair

Chainsaw clutch malfunctions are one of the most common failures of this technique. The question of how to remove the clutch on a chainsaw at home correctly and NOT harm the tool is thought not only by inexperienced technicians, but also by specialists who have repaired it more than once. This is due to the fact that the clutch is an important key element of chainsaws of any power class and brand, on which their serviceable, long-term and successful operation depends.

In cases where gasoline cutters start to start poorly, slip instead of starting, checking the clutch for faults is mandatory, recommendations for which will be presented further.

The device and principle of operation of the clutch of chainsaws

Modern chainsaws are equipped with centrifugal clutches. This means that their work entirely depends on the engine torque, which at a particular time is given by the saw.

Its main structural elements are:

  • Drum;
  • Star;
  • Springs.

The principle of operation is as follows. When starting the saw, the elements that move freely in the radial direction are pulled together by springs to the shaft axis. In this case, the torque is NOT supplied to the drum, and therefore to the sprocket and guide. At the moment when the centrifugal force prevails over the force potential of the springs, the clutch elements weaken and compress in the inner part of the drum, initiating its torsion. Together with it, the rotational cycle goes to the sprocket and the most shi-chain headset.

The main advantage of this type of clutch is its slippage when the cutting part is suddenly braked, which does NOT stop the engine. As a result, the “heart” is dust. the motors remain safe and sound.

Clutch repair: the nuances of the process

When servicing clutches yourself, you need to know that:

  • Several saws have a washer that sits between the sprocket and the clutch and the sprocket and the motor. Consider this when repairing;
  • The special spring of the oil pump drive must not be damaged during disassembly, and must also be returned to its original position. Otherwise, the chain will receive less lubrication or no longer lubricate at all.

The tool that has been repaired must be checked for the reliability of the bolt ties, the supply of lubricant to the chain and the serviceability of the motor (it should turn on smoothly and work smoothly). Only then can it be exploited.

When to remove the clutch

Dismantling the clutch for removal is carried out in the following cases:

  • When the spring bursts (the chain turns, the engine runs intermittently)
  • The spring has flown;
  • A piece of drum has broken off (in this case, noise will be heard, the chainsaw chain will also spin)
  • Temporary wear (it’s time to remove and change the clutch due to resource depletion).

Modern chainsaws operate on two-stroke engines, which are connected by a gearbox to the saw chain. The chain moves along the tire, and according to the centrifugal principle, idling must remain stationary, that is, it must be safe for the person who is holding the chainsaw.

If the load on the tool exceeds the recommended load, then the clutch will loosen or completely stop transmitting torque to the tire. This will stop the engine. If such situations arise, the clutch wears out, so it needs to be replaced over time. In the instruction manual for the chainsaw, some manufacturers have information that the clutch is a consumable part, that is, it must be periodically replaced.

how to remove the clutch on a chainsaw:

Clutch malfunctions. Clutch adjustment

There is no such thing as “clutch adjustment”, but other components are usually adjusted, such as the carburetor, fuel system, starter motor or clutch. In order to adjust the clutch it is necessary:

  • Change the washer, which is located between the engine and the sprocket, or in other models, between the drum and the sprocket;
  • The stretched spring in the assembly cannot be pulled off, so it must be replaced with a new one. If you continue to cut with a defective spring, the lubricant will not flow to the chain, and this will lead to tool breakage.
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Vladimir Khlestov, 44 years old, Armavir

“After six months of operation, the chain on the chainsaw began to spin constantly. I decided that there was a problem with idling. No carburetor adjustments helped. They took it apart in the workshop. it turned out that the spring on the clutch had burst. We changed everything in 10 minutes, and for two months I could not find a fault. The main thing is the correct diagnosis of the malfunction. “

Yaroslav Nedelko, 31 years old, Vinnytsia region

“I mainly cut hardwood. Quite often you have to sharpen the chain, and the drive sprocket wears out. The first time I removed the clutch. I had to sweat. The metal stuck tightly. it does not unscrew. Sprinkled with kerosene. did not help. Only after using it in Deshki was it possible to break it. And all because the oil was leaking somewhere, so the coupling was welded to the sprocket. I think so. “

Andrey Kosoglazov, 23 years old, Primorsky Territory

“After three months of using the chainsaw, a longitudinal groove appeared in the sprocket. everything works, but the chain does NOT rotate. They said the problem was in the clutch. It is not at all difficult to disassemble it, the main thing is to find a puller and DO NOT forget that the coupling nut has a left-hand thread. In short, I unscrewed and changed everything without any problems. It works perfectly, and there was nothing complicated there, only it was necessary to be careful. “

How to replace a clutch on a chainsaw.

Reasons why you need to disassemble the clutch:

  • Defective or broken 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.

Chainsaw clutch replacement. Recommendations and reviews. Removing the clutch on the Stihl and Dolmar chainsaw

You’ve probably noticed that chainsaws can have different designs of transmission devices. Above are instructions for removing the clutch with a drum on which the sprocket is on the inside. Most chainsaws have such a device, but not on Stihl brand tools. Chainsaws of a well-known manufacturer are equipped with a drum, which has an asterisk on the outside. It looks like this, as shown in the photo below.

A different sprocket arrangement does NOT mean that the tool has a Different clutch mechanism. However, this suggests that the principle of clutch removal is different from the above instructions. Therefore, we will find out how to remove the clutch on the Stihl, Dolmar and others chainsaw, on which the asterisk is on the outside.

  • To begin with, you must also remove the casing and the tire to provide access to the coupling
  • Unscrew the spark plug and lock the piston with a special wrench or cord
  • Next, we proceed to removing the sprocket and the drum. To do this, pry the retaining ring with a screwdriver and remove it
  • Dismantle drum with bearing
  • Using the key on “19” (supplied with the tool) it is necessary to Unscrew the nut with the left-hand thread connected to the mechanism. Unscrew in a clockwise direction
  • You can then carry out the Appropriate repair or replacement of the part

Installing a new or repaired part is the reverse of removal. The procedure is almost identical to the first option, with the exception of some peculiarities. If it is necessary to replace only the drum or sprocket, then it will NOT be necessary to dismantle the clutch, in contrast to the variant with the internal arrangement of the sprocket.

Clutch repair: the nuances of the process

When servicing clutches yourself, you need to know that:

  • Several saws have a washer that sits between the sprocket and the clutch and the sprocket and the motor. Consider this when repairing;
  • The special spring of the oil pump drive must not be damaged during disassembly, and must also be returned to its original position. Otherwise, the chain will receive less lubrication or no longer lubricate at all.

The tool that has been repaired must be checked for the reliability of the bolt ties, the supply of lubricant to the chain and the serviceability of the motor (it should turn on smoothly and work smoothly). Only then can it be exploited.

Replacing an asterisk on a Chinese chainsaw

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Then you need to stop the crankshaft so that it does not spin when the clutch is unscrewed. How to remove the clutch how to change the chainsaw patriot garden 3818 how the chainsaw works. To stop the crankshaft, for example, with a huge knob, you need to remove the recoil starter cover and screw two bolts into the rotor of the ignition system. Or Unscrew the spark plug, lower the piston to BDC and lock it there by pushing a rope into the spark plug hole.

How to remove a chainsaw clutch. 1. In order to remove the clutch on the chainsaw chain. Next, Unscrew the clutch. with a key from the chainsaw kit, or with an angle grinder key for discs, or with a homemade key (for example, from an old tire with 2 bolts) clockwise.

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Then remove the drum with the leading sprocket from the chainsaw. Chainsaw clutch drum replacement is done according to the rule: change two tires. change one drum.

Then he will put on a new clutch and tighten it with his hands until it stops (twisted counterclockwise). With all this, you need to stop the crankshaft again so that we wrap the clutch DO NOT break the starter located on the other end of the chainsaw crankshaft.

Then everything is assembled in order of reverse disassembly.

Chainsaw clutch. How to change it for Chinese chainsaws, as well as for shihl. To tighten the clutch on the chainsaw completely, you need to move the chain brake handle forward, start the chainsaw and then release it from the brake.

How To Unscrew The Clutch On A Chainsaw

Algorithm for self-replacement of the clutch drum with an asterisk

The technology of replacing the leading sprocket provides for the implementation of the entire amount of work in a given sequence:

  • Dismantling the headset and air filter;
  • Installation of a piston retainer in the spark plug hole;
  • The clutch and the gear drive made in one piece with the drum are removed by means of a puller, The sprocket can only be unscrewed clockwise.

If a large cage wear is detected, the springs of the centrifugal mechanism and cams are broken, it is recommended to replace the entire set.

If the condition of the removed parts is not in doubt, the entire mechanism is assembled in reverse order. To securely fix the clutch on the crankshaft, it is enough to Unscrew the piston stopper, pull out the standard starter cord and return it to its original position.

Amateur craftsmen should be warned against simplifying the requirements of repair technology and saving money on installing cheap Chinese components.

The quality of the work done is guaranteed by attention, accuracy, adherence to the sequence of all dismantling and assembly operations.

The clutch is the connecting link located between the power unit and the cutting bodies of the chainsaw. Its main function is to transfer the rotational force created by the motor to the tracking headset. Most modern household and professional chainsaws are equipped with reliable metal clutch parts, but they also completely fail over time. You can fix the breakage of the assembly at home, but for this you need to carefully study the procedure for disassembly and the features of replacing clutch elements with your own hands.

How to remove the clutch on a chainsaw?

To remove the clutch from the chainsaw. The operator needs to adhere to a certain algorithm of actions.

For this you need:

  • Dismantle the cutting attachment by unscrewing the 2 fastening screws of the metal guide;
  • Remove the upper part of the foam air filter housing and remove the protective clutch cover;
  • Block the movement of the crankshaft. To do this, you need to remove the cover of the trigger protection and screw 2 steel bolts into the standard rotor of the built-in ignition system. Another option. Unscrew the candle and carefully lower the standard piston, blocking it there with a coil of tight rope;
  • Carefully remove the clutch itself, turning it strictly in the direction of the clock hand. To do this, a key from the delivery kit of the chainsaw or a homemade tool made from an old tire with two bolts pre-installed on it is suitable;
  • Carefully dismantle the drum and the standard drive sprocket. It is necessary to regularly replace the drum after using two guide tires. in the future this rule will reduce the load on the power unit of the chainsaw and extend the life of its piston;
  • Install a new clutch and carefully screw it against the clock hand. To do this, the operator must re-lock the engine crankshaft;
  • For the final fixation of the new ignition, it is necessary to move the inertial brake handle forward, start the internal combustion engine of the petrol tool and return the handle to the previous position.

When servicing the clutch before assembling the clutch on the chainsaw. It is necessary to thoroughly lubricate its internal components. Without the right amount of lubricant, the mechanism will regularly overheat, and its parts will deform and lose their original position in relation to each other.

Recommendations for replacing the clutch on a chainsaw

In addition to the basic rules of work described in the previous section, it is worth remembering some nuances when replacing the clutch. Use only original parts from the manufacturer. this is the key to a long and productive work of the tool. The clutch thread on all chainsaws of any manufacturer is always left. Before removing the coupling, carefully remove all dirt and dust from the tool so that it overshoots inside. When reassembling, remember to replace all the small parts, including washers and bearings. Watch the installation of a special spring (it is NOT in all chainsaws). if it is incorrectly installed, oil will not be supplied to the tire.

General disassembly principles

Basically, all chainsaws have the same components, which are dismantled according to a certain scheme. If the assembly of the saw is Chinese, then there is nothing to worry about: most often they are made in the likeness of European models. How to disassemble a chainsaw:

  • The clutch cover is removed.
  • The starter cover is removed. To do this, you need to Unscrew the screws and remove the cross handle.
  • To remove the handle, you need to remove the cover that covers the air filter.
  • The petrol hose is removed from the fitting cover.
  • The saw body is dismantled. It is necessary to unscrew the screws and remove the oil tank cover.
  • Before removing the ignition module, you need to disassemble the clutch drum: you need to turn the crankshaft clockwise until the piston closes the gas outlet.
  • Then you need to unscrew the clutch on the chainsaw and remove the clutch: you need to lightly hit it with a hammer.
  • The screws are removed, the gas tank with the oil hose is dismantled.
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How to remove a clutch from a chainsaw: a detailed report

The clutch repair process consists of the following operations:

  • Dismantle the chain set, air filter flaps and the clutch itself;
  • Stops the crankshaft. just unscrew the ignition urine;
  • Unscrew the clutch with a special key with strong movements clockwise or counterclockwise (in different models, dust can be both left and right thread). Usually, a tool for removing the clutch is included in the delivery of chainsaws;
  • Go to disconnecting the drum and sprocket;
  • If, when inspecting the clutch, one or more cracked springs were found (there may be several of them, for example, in the Husqvarna chainsaw. 3 units). you need to replace the broken spring with a new one;
  • Assemble the clutch on the chainsaw, put it in place and screw it in. Remember that the crankshaft must still be motionless;
  • Assemble the removed parts on dust in the reverse order of disassembly;
  • Lock the clutch. move the additional brake handle forward, start the device and carefully remove it from the inertial brake.

Chainsaw design

All chainsaws have the same design, regardless of which device, domestic (Ural, Kedr, Patriot 3816, Carver. Russian production with Chinese Partners) or foreign (Stihl, Husqvarna), for example, repairing a Patriot 3816 chainsaw with your own hands will be the same as well as fixing a foreign device. The main components of the tool:

  • Engine.
  • Fuel tank.
  • Starter.
  • Handle.
  • Tire with chain.

The general principle of the chainsaw is simple. the master sharply pulls the cord, which starts the engine, and he, in turn, starts the saw blade. Sometimes, the device malfunctions, in order to eliminate them, you will have to dismantle the saw. Problems that can arise with a chainsaw:

  • It just won’t start.
  • Starts up, but after a while stops working.
  • Doesn’t work in cut.
  • Power drops.

The main problems that arise are related to engine problems (fuel supply, exhaust system, cylinder-piston system and ignition), or minor problems (chain problems, lubrication, tire, oil seal). It is important to consider each problem in more detail.

If the chain simply breaks, then it should be replaced with a new one. Problems with the solution of this problem should not arise. The repair of the second parts of the saw can take up to several hours.

No matter how trite it may sound, if the chainsaw starts, then you need to check the tank for the presence of gasoline. If there is fuel in the system, it is possible that the breather that equalizes the pressure when fuel is supplied has been forgotten. The breather can be cleaned with a sharp awl or needle. The candles are turned out with a candle wrench and cleaned with sandpaper. You can also ventilate the combustion chamber. After THESE procedures, the saw should start.

If the saw shuts off automatically, the trigger is most likely defective. But sometimes it happens that it’s not about him. In this case, unscrew the candles and inspect them carefully. If traces of fuel are visible on them, it means that the carburetor is incorrectly adjusted. The plug must be cleaned and the premises back, after having cut off the fuel supply.

If black carbon is visible on the candles, then the matter may be in bad oil, a poorly adjusted carburetor and an incorrectly calculated ratio of oil and gasoline. In this case, you also need to clean the candle and put it back.

It is also important to check the device for sparks. This is easy to check: you need to connect the spark plug to the ignition cable, use pliers to connect the cylinder and the plug nut, and then observe the presence of a spark. If not, the candle must be replaced. If, when changing a candle, it turned out that the other does not emit sparks, then the problem may be an inoperative contact with the candle or a high-voltage conductor.

Cylinder-piston group

It happens that the engine does not start or malfunctions due to low pressure in the cylinder. The malfunction may consist in a worn out piston, cylinder or bearings, sinking of the piston rings. You can consider the problem in general terms, for this you need to remove the muffler and inspect the system.

Compression in the engine can be measured by placing the compression gauge in the spark plug hole. After a while, you can draw conclusions based on the results of the measurement. You can only consider the problem by completely disassembling the system. If the piston shows scratches or chips, then it needs to be replaced. The piston ring must be installed in its rightful place, clean and intact.