How to remove the handwheel on a chain saw

How to remove the clutch on a Partner chain saw

The STIHL MS 180 is a rugged, dependable machine. but it can be repaired just like any other piece of machine. In this article we will look at how a STIHL mc 180 chain saw is disassembled, which is necessary in case of an engine overhaul.

The preparatory phase

Repair of any machine should begin with preparatory work. and the STIHL STIHL 180 is no exception.

Before you first start removing the STIHL STIHL 180 chain saw it is first necessary to remove the side cover, the chain and the guide bar from the chain saw.

Next, with a compressor and a brush, you need to clean the chain saw from dirt, sawdust, oil and other smudges.

How to make chainsaw flywheel removal tool

When cleaning the chain saw, special attention should be paid to the place where the chain saw’s drive sprocket is located, t. к. This is the dirty part.

In the places of big oil accumulation, it is possible to wash with clean gasoline.

Removing the handle

Disassembly of the STIHL 180 begins with the removal of the handle, which is attached to the body of the chainsaw by three rubber shock absorbers.

To remove it, it is necessary to remove plastic plugs from the inside cavity of the shock absorbers, and then, using a strong screwdriver, to squeeze first the upper shock absorber, then the one that is closer to the rear handle.

The throttle trigger is located at the rear of the handle and is connected to the carburetor by a wire tie. To disconnect the cable from the throttle trigger you must loosen two screws and disassemble the handle.

When the handle remains on one shock absorber, it is necessary to unscrew the body of the chainsaw from the inside of the handle and, breaking it to the side, remove the body from the last rubber.

Removing the starter motor

In the next step, remove the upper cover of the housing and unscrew the 4 screws fixing the starter, then you need to remove the oil tank and fuel tank covers. The starter motor is easy enough to remove and should be no problem.

After removing the starter motor, the exposed interior of the chainsaw must be cleaned, t. к. there is usually a lot of compressed fine sawdust on the housing under the starter motor.

Handwheel Removal

the STIHL 180 chain saw flywheel is screwed tight, so to remove it you will need a head with a metal screwdriver. The nut that holds the flywheel can be unscrewed with a 13 head.

To block the crankshaft from turning, you need to unscrew the plug and through the candle hole establish a piston stopper, if it does not exist, you can use an old starter cord, with a knot tied to it and immersed in the cylinder through the candle hole.

Strictly prohibited to keep the flywheel from turning by installing between the ribs and the body of the power screwdriver and other tools, with this method of blocking against rotation, the flywheel blades can not withstand the load and break.

After the piston in the cylinder is locked, the flywheel nut can be unscrewed. The thread in the nut is common, so it should be turned to the left side.

After loosening the nut, it is not necessary to remove it completely, just unscrew it until its upper edge is flush with the tip of the shaft, then place a soft metal punch on the nut and give it a sharp blow.

This allows the flywheel to come off the shaft quickly and easily without tools.

Disassembling clutch and oil pump drive

Before disassembling the clutch, it is necessary to remove the drive sprocket. To do this, carefully remove the lock washer from the slots on the shaft and remove the sprocket and needle bearing.

using a 19″ high crown, the clutch should be unscrewed. It has a left-hand thread, so it can be unscrewed towards the guide bar and not towards the rear of the STIHL 180.

Unscrewing and removing the clutch, you must immediately remove the deflector plate and the oil pump drive, it’s easy to do, t. к. They are bolted to the shaft without any fastener.

See also  How to calculate pulleys for a circular saw. In the armature chain

Extractor, silencer and ignition coil

To remove the carburetor, you need a head for 8 and an extension cord, which is useful for loosening the nuts fixing the carburetor and the air filter.

Before dismantling the carburetor, you must disconnect the ignition wire and the air damper rod from the engine control lever and remove the lever, only after that remove the air filter and carburetor.

The STIHL 180 muffler is fitted with two nuts and can be removed quickly by first unscrewing them.

remove, handwheel, chain

The coil is held by two screws and can be removed by simply unscrewing them.

Removing and disassembling the engine

The engine is held in place by 4 screws on the bottom of the STIHL 180. To remove, simply unscrew the two screws and carefully lift the engine out of the carburettor rocker and the rubber nozzle.

To disassemble the engine unscrew the 4 screws of the crankcase, and it is removed, then you can remove the crankshaft complete with oil seals, bearings and piston rings.

Removing bearings and oil seals usually does not require additional tools, but if the bearings were pressed on the shaft with force, you will need a special puller for disassembly.

To remove the piston from the connecting rod, it is necessary to remove the retaining ring from the housing, with a thin screwdriver, then from the opposite side press out the piston pin, and then the piston is removed to the side.

To assemble the STIHL 180 chain saw

Reassemble the STIHL ms 180 saw, it is easy enough, the main thing is to adhere to the following algorithm:

  • Install the piston on the connecting rod with the arrow on the piston facing away from the STIHL 180 and the crankshaft side to the left of the piston for the flywheel;
  • Carefully slide the piston back into the cylinder and make sure you mount the spool on the side where the flywheel sits on the crankshaft;
  • Install the bearings, oil seals, retaining ring on the shaft and lower the entire assembly into the seat in the cylinder;
  • Then you need to degrease the place where you install the sump and the sump itself, and then lubricate the sealant and install it in place and tighten the four screws fastening;

The preparatory phase

Repair of any machine should begin with preparatory work, and the STIHL 180 is no exception. Before beginning the STIHL 180 chain saw disassembly, remove the side cover, chain and guide bar from the chain saw. Next, using a compressor and a brush, you need to clean the chainsaw from dirt, sawdust, oil stains and other.

When cleaning the chain saw, special attention should be paid to the place where the chain saw’s drive sprocket is located, because. к. this is the most contaminated area.

In places where there is a lot of oil, you can flush it with clean gasoline.

How to change a chainsaw clutch?

Owners of chain saws probably wondered more than once. how to change the clutch on their chain saw? On most models of chain saws the dismantling and replacement of the clutch can be easily done manually by the owner, on a small number of models unscrewing the drum can only be made in the workshop (such chainsaws include, for example, Husqvarna 137 or Partner 351).

Chainsaw clutch disassembly

In this review, we will learn how to remove and change the clutch on a chainsaw yourself, when to do it and what tools you may need.

How to Remove Magneto on a Chainsaw

Parts for chain saws and trimmers with delivery nationwide post cash on delivery.

  • Parts for chain saws
  • Chainsaw cylinder and piston groups
  • chain saw carburetors
  • Starters for chain saws
  • Saw chain saw ignition coils
  • Chainsaw chain brake covers
  • Chain tensioners
  • Chain saw clutch
  • Oil Pumps
  • chain saw crankshafts
  • Chain saw flywheels
  • Chainsaw bearings
  • Gasoline chain saws oil seals and gaskets
  • Chainsaws rims
  • Other chain saw parts and assemblies
  • Chain saws fuel tank caps
  • Chainsaw mufflers
  • Trimmer parts
  • Trimmer cylinder and piston groups
  • Carburetors for chain saws
  • Starters for trimmers (бензокоса)
  • Coil ignition trimmer (бензокоскос)
  • Clutching trimmers (chain saws)
  • Trimmer (chain saw) handwheels
  • Gearboxes of trimmers (chain saws)
  • Trimmer (chain saw) crankshafts
  • Elements of the rod and handle
  • Trimmer Oil Seals and Seals
  • Trimmer mufflers

How to Remove the Handwheel from a Chinese chain Saw?

How to remove and put in place the flywheel with a Chinese chain saw! My affiliate program VSP Group. How to remove the magneto rotor flywheel on a brushcutter. Connecting.

The insidiousness of such a failure is that the diagnosis below does not give one hundred percent confidence in the performance of the ignition coil. Such an implicit failure, when the spark seems to be there, but it is not quite right, is often misleading and makes you write off problems with the ignition coil to a faulty carburetor.

Typical action in such cases is to increase the fuel supply. So, this spark can ignite an enriched mixture, but a right one can’t. But the use of enriched mixture leads to rapid wear of the cylinder-piston group and muffler. So in these situations of dispute check the carburettor and the ignition coil.

See also  What is better a chainsaw or an electric.

The ignition on the trimmer. the principle of operation and possible malfunctions

If the owner of a lawnmower wants to adjust the ignition system by himself, he should understand the principle of operation of this node. In an internal combustion engine it consists of a flywheel and a magneto. In turn, the flywheel includes the impeller, which performs the function of cooling the motor and a number of permanent magnets.

remove, handwheel, chain

How it works

When the flywheel turns, an electrical current is generated in the magneto which creates a spark on the spark plug at the instant that the magnets pass underneath the coil.

Typical faults

Before starting to adjust the ignition of the grass trimmer, it is necessary to cut off other likely causes of failure and make sure that the problem is really in this node. To do this, it is necessary to carry out a number of actions in this sequence:

Inspect for damage and defects in the ignition coil body, to ensure that all components and elements that conduct current, no dirt, check the integrity and insulation of wiring, contacts, fastening strength, the presence of rust at the joints, inspect the plug cap, as it is regularly torn from the high voltage wire, and it tries to recover manually, and any unreliable connection reduces the power of the arc plug; inspect the plug, as the quality of modern gasoline quickly puts out of service this child.

Having eliminated all possible malfunctions, you can move on to adjusting the ignition coil.

Remove and disassemble the engine

The engine is held in place by four screws on the bottom of the STIHL 180. To remove it is necessary to unscrew them, and then gently remove the engine from the seat and the rubber nozzle of the carburetor.

To disassemble the engine unscrew the 4 screws of the crankcase, and it is removed, then you can remove the crankshaft complete with oil seals, bearings and piston rings.

Removing the bearings and oil seals normally does not require any tools, but if the bearings were pressed on the shaft with force, a special extractor is needed for disassembly.

To remove the piston from the connecting rod, you need to remove the retaining ring from its seat, with a thin screwdriver, then from the opposite side presses the piston pin, after which the piston is removed to the side.

Reassembling the STIHL 180 chain saw

To reassemble the STIHL ms 180 saw, it is easy enough, the main thing is to adhere to the following algorithm:

  • Install the piston on the connecting rod, the arrow on the piston must look in the direction of the chain saw STIHL 180, and on the left hand side of the piston located crankshaft, which is designed to install the flywheel;
  • To mount the spool carefully back into the cylinder, place it on the side where the handwheel is mounted on the crankshaft;
  • Install the bearings, oil seals, retaining ring on the shaft and drop everything in the assembly into the seat in the cylinder;
  • Next, degrease the place of installation of the crankcase and the crankcase itself, then lubricate the sealant and having installed in place screw 4 screws fastening;

Making up chainsaw chain by hand. No spinner No breaker.

To reassemble the STIHL 180 saw after the engine is assembled, you must follow the reverse sequence of disassembly

It is important to treat the process carefully and do not forget to install the rods on the carburetor, and connect the ignition wire

Below you can watch the disassembly of the STIHL 180 on video, it is made for inexperienced users, it shows the whole process in detail.

How to remove the clutch from a Chinese chainsaw. Construction Equipment

Many gasoline chain saw owners are concerned about how to remove the chain saw sprocket after the device has broken.

When replacing the chainwheel, all work must be done with care and attention.

The chainsaw is built like a conventional chain saw and is powered by an internal combustion engine. This apparatus is built around one of the more basic single-cylinder, two-stroke carburetor engines that run on gasoline.

The simple construction of the engine and the chainsaw itself are essential for problem-free and dependable operation even under hard conditions. The chainsaw does not require a great deal of skill and knowledge from the operator.

The only prerequisite for long and trouble-free use is regular inspection and maintenance of the device. The chainsaw requires regular replacement of parts that are subject to wear and tear.

To reduce wear on the tool, you should monitor the chain’s lubrication quality, chain tension, chain wear, and degree of wear on the drive sprocket.

Before carrying out the repair of a chainsaw, you should study its design. To replace one of the main structural elements of the unit, the drive sprocket, it is necessary to study the unit’s clutch mechanism.

Unit clutch design

Chainsaws are units that are equipped with drive sprockets that form a single unit with a clutch basket.

Clutch is engaged automatically depending on the number of engine revolutions.

The units are fitted with a centrifugal type clutch, which is actuated automatically, depending on the number of engine revolutions.

See also  What kind of oil to mix with petrol for a chainsaw?

When the machine’s engine is running at idle or low speed, the friction lining elements of the clutch basket have a certain amount of freedom in the radial direction.

The freedom of movement causes the elements to be drawn to the center of the rotary shaft under the action of the springs and does not transfer rotary motion to the sprocket drum.

The centrifugal force exceeds the force of the springs, which leads to the displacement of the elements with friction pads when the engine speed increases. These elements are pressed against the inner walls of the drum by centrifugal force.

This contact transmits rotational motion to the drum and sprocket, which drives the saw chain of the tool. The chainsaw sprocket can be located either outside the tool, or under a special cover that protects the mechanism from damage, and the device operator from injury.

The main advantage of this type of clutch is that in the case of jamming of the saw chain the slippage of the elements with friction linings occurs, which protects the combustion engine from serious damage.

The main reasons for changing a chain saw chainwheel

Allen wrench is a key tool you will need when replacing a sprocket.

The most common reasons for tool repairs involving replacement of a drive sprocket are:

  • jamming of the chain due to faults in the chain while the machine is running;
  • high sprocket wear caused by prolonged use of the machine.

If the device is used regularly, there is increased wear on the drive sprocket as a result of the increased loads it is subjected to while sawing wood. There are two ways to operate the device:

The first method of operation exploits the chain until it is completely worn out. This method of operation has several disadvantages. the main one is the problem with checking the wear during intensive machine operation.

If two or more chains are used in the process, even wear of the chains and sprocket can be achieved, thus extending the service life before a repair consisting of replacing the sprocket.

In addition to sprocket wear, the bearing in the sprocket should not be forgotten. This component is designed to operate at all engine speeds. If the sprocket is replaced, the bearing should be replaced at the same time.

The clutch and sprocket assembly should be replaced in a timely manner.

If repair work is not performed in time, the tool will vibrate and wear out the bearings in the internal combustion engine on the crankshaft halves.

The sprocket tooth wear limit should not exceed 0.5 mm. Sprocket life is twice as long as a single chain, so you should use two chains while working. After service life of chains is used up, chains and driving sprocket should be replaced at the same time.

Algorithm of carrying out replacement of the clutch drum

To keep your chainsaw in good working order you should have it inspected at regular intervals.

When replacing the clutch drum, only use a specified type of component for installation. When replacing the drum, the bearings of the design element should be changed at the same time.

remove, handwheel, chain

To carry out the repair work, you should purchase a special repair kit, which contains in its composition the drive sprocket and the bearing.

The basic tools that will be required when making repairs are as follows:

  • A universal wrench that comes with the chainsaw;
  • piston stopper, can be made of plastic or metal;
  • a special puller of the centrifugal mechanism or clutch drum.

The procedure consists of several stages. Each stage has its own peculiarities depending on the design features of the chainsaw, but the scheme and sequence of works is the same for any model of the machine.

Bearing Installation

The reverse operation of pressing in the bearing does not require the same effort as the removal of the rolling bearing. it is sufficient to use a head of suitable size and a hammer as a mandrel. The main nuances in fitting the bearing are as follows

  • The seating should be cleaned of any remaining material, especially after removal with loaf crumbs or soap;
  • the grease must be well protected by the cover, if it gets on the clutch, the quality of rotation will decrease, the disc will slip inside the basket.

Since the bearing is pressed into the flywheel, which sits on the crankshaft, and the gearbox shaft is inside it, the alignment of rotation of these assemblies is required. Otherwise, unbalancing of the primary shaft will cause the replacement of all other gears.

Thus, if the needle bearing in the flywheel of a particular engine is installed on the assembly line, you should ensure its maintenance and replacement with an original spare part or an analog allowed in the instruction manual of the machine.

Related Posts

| Denial of responsibility | Contacts |RSS