Replacing piston rings on a STIHL chainsaw

How to change a piston on a STIHL 180 chainsaw

If you need to replace the old piston and install a new one, you need to know how to do this correctly and follow a certain algorithm of actions. You also need a small slotted screwdriver, a special STIHL combination wrench, a power screwdriver, a hammer, a soft material drift, a compressor and a STIHL piston stopper.

When starting work on replacing the piston or piston group assembly, the chainsaw must be cleaned of dirt as efficiently as possible. Further, the work is carried out according to the following algorithm:

  • The top cover is removed from the saw and the spark plug is unscrewed.
  • Side cover is removed.
  • Using a power screwdriver, the stoppers are removed from the shock absorbers of the chainsaw, after which its handle is disconnected from the body.
  • Next, you need to remove the drive sprocket and starter.
  • Install the piston stopper in the spark plug hole and loosen the flywheel nut and clutch.
  • Remove the flywheel, clutch and oil pump worm drive mechanism, which is located behind the clutch.
  • Loosen the two screws securing the carburetor and air filter. Remove filter, engine control lever and STIHL carburetor.
  • Remove ignition coil and muffler.

After all these operations have been carried out, it is necessary to clean the saw from dirt again, then turn it upside down and unscrew the four screws securing the engine to the chainsaw body. By unscrewing the screws, the motor is separated from the housing and cleaned again.

On the removed engine, the pallet is untwisted and removed, after which the piston assembly with the crankshaft is removed from the engine.

replacing, piston, rings, stihl, chainsaw

When removing the piston from the cylinder, you must remember how it was located relative to the cylinder.

Next, using a small screwdriver, the piston pin retaining rings are removed, and the crankshaft is disconnected from the piston.

Stihl 025 Chainsaw piston replacement

In the case when it is necessary to replace only the piston, you can install it on the crankshaft, then mount the piston pin circlips, while positioning them so that the snap ring break point is directed downward. This is necessary in order to prevent the circlip from spontaneously jumping out when the engine is running (according to the STIHL manufacturer’s instructions). After that, the compression rings are installed, the cylinder is lubricated with engine oil and the engine is assembled.

The work of installing the piston into the cylinder must be carried out with utmost care, since the compression rings are fragile and easily break.

The crankcase is installed on the engine, a sealant is used as a gasket, after which four fastening screws are mounted and tightened crosswise. Further, the engine is installed on the body of the chainsaw. Subsequent assembly is carried out according to the reverse disassembly algorithm.

When a piston needs to be replaced

The circumstances for which the piston needs to be changed, as in general, and one hundred percent piston, you will like a lot, but our client remains divided into natural and seemed after the end of incorrect operation. Natural, this is the wear caused by the long-term operation of the STIHL 180 chainsaw. Artificial is not yet easy, for example:

    overheating of the motor and the occurrence of thermal seizures;

It is necessary to diagnose the CPG then if the STIHL 180 ms has dramatically lost its power otherwise it does not start, while the starter of the tool does not turn. If the passage if the starter turns, alas, the saw does not start, with all this there is a spark and the fuel enters the cylinder regularly, you need to measure the compression in the engine.

If you suspect problems with the CPG, it is better to contact a service center authorized by the manufacturer, since only there are variations in it, accurately diagnose the malfunction without full analysis and if it is necessary to carry out a high-quality repair.

9.5. 11 atm. It is considered a common indicator when a STIHL chainsaw starts up properly and gives out the highest power, if the compression is lower, there is a possibility that there are bugs on the cylinder-piston group, or its wear is quite large. Under any circumstances, with reduced compression, for the upcoming diagnosis, you need to completely disassemble the saw.

It is possible to find the presence of seizures on the piston, also a break in the piston ring, if you remove the muffler and conduct a visual inspection of the visible part of the piston, with all this, there is an option to check the rings for elasticity by pressing them with a small screwdriver. There will be little movement on the working rings, a defective or jammed piston ring will not move.

Malfunctions in the lubrication system and their elimination

Chainsaw repair is also required if there are problems with the lubrication system. Most often they consist in the absence of oil supply to the chain, as evidenced by the apparent dryness of the latter, or in oil leakage.

Lubricating fluid is either poorly or not at all supplied to the chain, usually due to clogged or completely clogged oil supply channels. Dismantling the STIHL 180 chainsaw part 2, video. To identify where the oil flow is blocked, it is necessary to carefully inspect the oil hose and its connection points. In addition, be sure to clean the oil filter.

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If oil leaks, then this indicates a violation of the tightness of the oil channels or hose. As a rule, this is due to mechanical damage. Most often, the unusable hose is removed, and a new one is put in its place. But sometimes a less radical method is used, treating the damaged hose with an appropriate sealant.

Placing Piston Rings On a Stihl 54mm Clone Farmertec Cylinder Kit

Thus, the repair of the STIHL chainsaw, due to the relative simplicity of its design and the fundamental similarity of its power unit with many other internal combustion engines, can be carried out on our own. over, this can be done in ordinary home conditions, without resorting to the help of repair specialists.

The main malfunctions of the STIHL ms 180 chainsaw are associated with the piston group. Consider the main reasons why the piston needs to be replaced. Let’s give a description of the piston and the algorithm for its replacement.

Replacing the piston group on the STIHL MS180 chainsaw

In this video we will show you how to replace the piston group on the STIHL MS180 chainsaw, crankshaft oil seals.

A distinctive feature of the CPG on the STIHL MC 180 will be that it has two compression rings, although in fact all of its main rivals have only one. As the manufacturer convinces, the installation of a pair of rings makes it possible to better stabilize the piston in work, enhance its cooling and increase the compression in the engine, which is why starting is improved.

Malfunction of the fuel supply system

As mentioned earlier, the examination of a faulty sawing tool must begin with establishing the presence of gasoline in the fuel tank, also with finding out the technical condition of the breather.

Repair of a STIHL chainsaw in case of a malfunction of the fuel supply system.

When checking the fuel level, it is imperative to open the gas tank cap. This should be done even if the owner of the tool has confidence that there is gas in the tank.

Often the saw cannot start due to the lack of fuel entering the combustion chamber. The prerequisite for this in most cases is the usual clogging of the breather. a special bypass valve that serves to equalize the pressure in the tank with a gradual consumption of gasoline. In this case, the repair of the chainsaw is reduced to a careful cleaning of the breather with a regular sewing needle.

How to change a piston on a STIHL 180 chainsaw

As needed, replacing the old piston and the newest installation, you should know how to do this correctly and follow a certain method of action. You also need to have a small slotted screwdriver, a special STIHL combination wrench, a power screwdriver, a hammer, a punch made of soft material, a compressor and a STIHL piston stopper.

When starting work on replacing a piston or piston group assembly, the chainsaw must be cleaned of contamination with maximum quality. Further, the work is carried out according to the following method:

  • The top cover is removed from the saw and the spark plug is turned out.
  • Side cover is removed.
  • Using a power screwdriver, the stoppers are removed from the shock absorbers of the chainsaw, after which its handle is disconnected from the body.
  • Next, you need to remove the driven sprocket and starter.
  • Install the piston stopper in the spark plug hole and loosen the flywheel nut and clutch.
  • Remove the flywheel, clutch and oil pump worm drive mechanism, which is located behind the clutch.
  • Loosen the two screws securing the carburetor and air filter. Remove filter, engine control lever and STIHL carburetor.
  • Remove ignition coil and muffler.

When these operations are carried out, you need to additionally clean the saw of dirt, then turn it upside down and unscrew the four screws securing the motor to the chainsaw body. By unscrewing the screws, the engine is separated from the case and cleaned again.

On the removed engine, the pallet is untwisted and removed, after which the piston assembly with the crankshaft is removed from the engine.

Replacing the piston group on the STIHL MS180 chainsaw

In this video we will show you how to replace the piston group on the STIHL MS180 chainsaw, crankshaft oil seals.

Dismantling the STIHL 180 chainsaw part 1

STIHL, shtil, MS180, STIHL, chainsaw / starting chainsaw STIHL 180 video.

CPG device

So, what is included in the CPG (cylinder-piston group):

Quick Tip For Fitting Replacement Piston Rings Into A Chainsaw Engine

  • Piston
  • Cylinder
  • Rings (oil scraper and compression)

The CPG is the main unit of the engine, the malfunctions of which inevitably lead to costly repairs. To maintain it in working order, you just need to strictly follow the instructions and follow some general rules:

  • Use quality oils, diluted in the exact proportion indicated by the manufacturer.
  • Avoid overheating the engine.
  • Observe the work standards for the chainsaw class (household, semi-professional, professional).
  • Always use a properly sharpened chain set in the correct direction.

Algorithm for replacing a piston chainsaw

If it is time to replace the CPG of the chainsaw, you need to know that for each specific model there is an individual algorithm of actions. To facilitate disassembly / assembly work, you must prepare a spark plug wrench, a large flat screwdriver, a hammer, a compressor for cleaning the unit parts, a set of open-end and socket wrenches. Regardless of the manufacturer and design features of the model, before removing the cylinder of the chainsaw, the following work must be performed:

  • Dismantling the upper protective cover;
  • Unscrewing the spark plug;
  • Removing the side cover;
  • With the help of a large flat screwdriver, the stoppers are removed from the shock absorbers;
  • In the channel of the candle we place a lace to fix the crankshaft and unscrew the clutch and flywheel nut;
  • Dismantling the drive chain sprocket;
  • We remove the carburetor with an air filter;
  • Removing the ignition module and exhaust system.

After removing it from the base of the power unit, unscrew the pallet and remove the crankshaft with the piston from the cylinder. Using plumbing tweezers or a screwdriver, we dismantle the piston pin stoppers.

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Before dismantling the piston, it is necessary to remember its location in the cylinder, so that later you do not waste time on re-disassembling and assembling the power unit.

Chainsaw pan sealant

Before starting the assembly, it is necessary to clean the parts and assemblies of the unit from dirt, sawdust residues, dust with compressed air, rags and other means. The first step in replacing a piston chainsaw is to install a piston on the crankshaft. We fix it on the connecting rod with a steel pin included in the delivery set of the CPG. In order to prevent arbitrary falling out of the retaining rings, it is recommended to install them with a cut down. Next, we mount the compression rings on the piston, but due to their fragility and fragility, this operation must be approached as carefully as possible. To prevent the formation of scratches before installing the piston in the cylinder, the piston must be lubricated with oil. Before installing the crankcase (pallet), you will need to degrease its mounting surface and apply a layer of heat-resistant sealant. We assemble the chainsaw in the reverse of the algorithm described above.

Often, replacing the chainsaw piston, crankshaft and compression rings solves problems with idle speed and problematic starting of the internal combustion engine.

Replacing the piston group on the STIHL MS180 chainsaw

In this video we will show you how to replace the piston group on the STIHL MS180 chainsaw, crankshaft oil seals.

The advantages of repairing STIHL chainsaws in the “Direct Hands” service center

By ordering a service from us, you will have access to the following benefits:

  • only experienced craftsmen trained by STIHL;
  • different payment options;
  • the workshop works seven days a week;
  • consultations are provided free of charge;
  • we cooperate with individuals and legal entities;
  • the breakdown is eliminated in 1-2 days, even during the peak season;
  • are fixed and do not increase in the course of work.

Description of the piston group of the STIHL 180 chainsaw

On the STIHL 180 chainsaw, the piston group has a diameter of 38 mm. replacing the piston group on a STIHL chainsaw how to wind a line on a mower. If in the photo the electronic ignition is turned 180 and how about the Ural chainsaw? The dimension of the chainsaw CPG is determined by the piston diameter, the cylinder is slightly larger. replacing the piston group on the STIHL ms180 chainsaw how to make the device yourself. As standard, the MS 180 CPG is supplied complete with a piston pin, two piston rings and two retaining rings.

The inner surface of the cylinder must be perfectly sanded and have a glossy sheen, which must be taken into account when purchasing a replacement cylinder head for a STIHL ms chainsaw. If there is damage to the inside of the cylinder, it is not necessary to install such a cylinder.

We examined the main causes and malfunctions of the STIHL chainsaw ms 180 in which it is necessary to replace the CPG. But, as a rule, in each specific case, the reasons may overlap, and for proper repair, an integrated approach to solving the problem is required. Putting a new reciprocating saw on the saw does not always mean solving the problem. It is imperative to eliminate the causes of the malfunction and the tool will serve for a long time without problems and the need for repair.

STIHL MS 180 is jamming the trigger. How to fix

This model has a problem. the hammer sticks in the felling position (when the saw is turned on its side). Problem.

STIHL ms 180 repair! assembling, replacing the oil hose, checking the carburetor

On the video you can watch a detailed video instruction in which the master showed in all details how to properly disassemble the saw and install a new piston on it. Also in the video you can see how the saw is cleaned correctly during the repair process.

Disassembly And Assembly Of The STIHL 180 Chainsaw Video

how to disassemble a STIHL chainsaw

In this video I will tell you how to properly disassemble the STIHL MS 180 chainsaw.

Chainsaw STIHL MS180. assembling correctly

I decided to remove a review on the assembly of the STIHL ms 180 chainsaw or as it is called STIHL 180. This chainsaw is without.

When a piston needs to be replaced

There can be many reasons why the piston needs to be replaced, as well as a completely piston one, but they can all be divided into natural ones and those arising from improper operation. Natural, this is the wear resulting from the long-term use of the STIHL 180 chainsaw. There are much more artificial ones, for example:

  • overheating of the engine and the appearance of thermal seizures;
  • ingress of a foreign body into the cylinder and the appearance of mechanical scoring;
  • breakage of the piston ring as a result of exceeding the maximum engine speed;
  • breakage of the piston skirt due to overspeed;
  • the use of low-quality fuel, as a result of which the piston group of the chainsaw wears out from the side of the intake channel in the cylinder;
  • operation of a STIHL chainsaw with a dirty fuel filter, as a result of which the percentage of oil in the fuel mixture is reduced;

It is necessary to diagnose the CPG if the STIHL 180 ms has suddenly lost power or does not start, while the starter of the tool does not turn. If the starter cranks, but the saw does not start, while there is a spark and the fuel enters the cylinder properly, it is necessary to measure the compression in the engine.

If there is a suspicion of problems with the CPG, it is advisable to contact a service center authorized by the manufacturer, since only there they can accurately diagnose the malfunction without full analysis and, if necessary, carry out a high-quality repair.

9.5. 11 atm. it is considered a normal indicator at which the STIHL chainsaw starts up properly and delivers maximum power, if the compression is lower, there is a possibility that there are scuffs on the cylinder-piston group, or its wear is quite large. In any case, with reduced compression, for further diagnostics, it is necessary to completely disassemble the saw.

READ  How To Assemble A Chainsaw Stihl 180

It is possible to determine the presence of seizures on the piston, as well as a broken piston ring, if you remove the muffler and conduct a visual inspection of the visible part of the piston, while the rings can be checked for elasticity by pressing them with a small screwdriver. There will be slight movement on the working rings, a defective or jammed piston ring will not move.

Why the STIHL chainsaw won’t start after replacing the piston

If the saw does not start after replacing the piston saw, it is necessary to check the fuel supply to the chamber, as well as to diagnose the ignition system. Very often, when installing the control lever on the chainsaw, the craftsmen forget to connect the wires coming from the ignition coil, as a result of which the spark disappears and the saw does not start.

Also, the problem may lie in a pinched fuel supply hose or if it is not connected at all. Of course, there can be many reasons, but it is worth remembering that if all the work on replacing the piston is carried out correctly, the tool should start without any problems and work normally.

How to change a piston on a STIHL 180 chainsaw

The main malfunctions of the STIHL ms 180 chainsaw are associated with the piston group. Consider the main reasons why the piston needs to be replaced. Let’s give a description of the piston and the algorithm for its replacement.

On the video you can watch a detailed video instruction in which the master showed in all details how to properly disassemble the saw and install a new piston on it. Also in the video you can see how the saw is cleaned correctly during the repair process.

How to change a piston on a STIHL 180 chainsaw

If you need to replace the old piston and install a new one, you need to know how to do this correctly and follow a certain algorithm of actions. You also need a small slotted screwdriver, a special STIHL combination wrench, a power screwdriver, a hammer, a soft material drift, a compressor and a STIHL piston stopper.

When starting work on replacing the piston or piston group assembly, the chainsaw must be cleaned of dirt as efficiently as possible. Further, the work is carried out according to the following algorithm:

  • The top cover is removed from the saw and the spark plug is unscrewed.
  • Side cover is removed.
  • Using a power screwdriver, the stoppers are removed from the shock absorbers of the chainsaw, after which its handle is disconnected from the body.
  • Next, you need to remove the drive sprocket and starter.
  • Install the piston stopper in the spark plug hole and loosen the flywheel nut and clutch.
  • Remove the flywheel, clutch and oil pump worm drive mechanism, which is located behind the clutch.
  • Loosen the two screws securing the carburetor and air filter. Remove filter, engine control lever and STIHL carburetor.
  • Remove ignition coil and muffler.

After all these operations have been carried out, it is necessary to clean the saw from dirt again, then turn it upside down and unscrew the four screws securing the engine to the chainsaw body. By unscrewing the screws, the motor is separated from the housing and cleaned again.

On the removed engine, the pallet is untwisted and removed, after which the piston assembly with the crankshaft is removed from the engine.

When removing the piston from the cylinder, you must remember how it was located relative to the cylinder.

Next, using a small screwdriver, the piston pin retaining rings are removed, and the crankshaft is disconnected from the piston.

In the case when it is necessary to replace only the piston, you can install it on the crankshaft, then mount the piston pin circlips, while positioning them so that the snap ring break point is directed downward. This is necessary in order to prevent the circlip from spontaneously jumping out when the engine is running (according to the STIHL manufacturer’s instructions). After that, the compression rings are installed, the cylinder is lubricated with engine oil and the engine is assembled.

The work of installing the piston into the cylinder must be carried out with utmost care, since the compression rings are fragile and easily break.

The crankcase is installed on the engine, a sealant is used as a gasket, after which four fastening screws are mounted and tightened crosswise. Further, the engine is installed on the body of the chainsaw. Subsequent assembly is carried out according to the reverse disassembly algorithm.

Description of the piston group of the STIHL 180 chainsaw

On the STIHL 180 chainsaw, the piston group has a diameter of 38 mm. The dimension of the chainsaw CPG is determined by the piston diameter, the cylinder is slightly larger. As standard, the MS 180 CPG is supplied complete with a piston pin, two piston rings and two retaining rings.

The inner surface of the cylinder must be perfectly sanded and have a glossy sheen, which must be taken into account when purchasing a replacement cylinder head for a STIHL ms chainsaw. If there is damage to the inside of the cylinder, it is not necessary to install such a cylinder.

A distinctive feature of the CPG on the STIHL MC 180 is that it has two compression rings, while almost all of its main competitors have only one. According to the manufacturer, the installation of a pair of rings makes it possible to better stabilize the piston in operation, enhance its cooling and increase the compression in the engine, thereby improving starting.

We examined the main causes and malfunctions of the STIHL chainsaw ms 180 in which it is necessary to replace the CPG. But, as a rule, in each specific case, the reasons may overlap, and for proper repair, an integrated approach to solving the problem is required. Putting a new reciprocating saw on the saw does not always mean solving the problem. It is imperative to eliminate the causes of the malfunction and the tool will serve for a long time without problems and the need for repair.