How to Put a Piston On a Stihl 180

The main malfunctions of the Stihl ms 180 chainsaw are associated with the piston group. Consider the main reasons why the piston must be replaced. Let us give a description of the piston and the algorithm for its replacement.

How to Put a Piston On a Stihl 180

When to replace a piston

There can be a lot of reasons why the piston needs to be replaced, as well as a completely piston one, but all of them can be divided into natural ones and those resulting from improper operation. Natural, this is the wear and tear formed due to the long-term operation of the Stihl 180 chainsaw. Many more artificial ones, for example:

  • engine overheating and the appearance of thermal seizures;
  • hit in the cylinder of a foreign body and the appearance of mechanical scoring;
  • breakdown of the piston ring as a result of exceeding the maximum engine speed;
  • breakdown of the piston skirt due to excess speed;
  • the use of low-quality fuel, as a result of which the piston group of the chainsaw wears out of the intake channel in the cylinder;
  • operation of a Stihl chainsaw with a contaminated fuel filter, resulting in a reduction in the percentage of oil in the fuel mixture;

It is necessary to diagnose the CPG if the Stihl ms 180 has sharply lost power or will not start, while the tool starter does not crank. If the starter turns, but the saw does not start, while there is a spark and fuel flows into the cylinder correctly, it is necessary to measure the compression in the engine.

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

9.5. 11 Atm. It is considered a normal indicator at which the Stihl chainsaw starts up regularly and gives out maximum power, if the compression is lower, there is a chance that there are scuffing on the piston-cylinder group or its wear is quite large. In any case, with reduced compression, for further diagnosis, it is necessary to completely disassemble the saw.

To determine the presence of seizure on the piston, as well as the breakdown of the piston ring, you can 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 on them with a small screwdriver. There will be slight walking on the working rings, the defective or pinched piston ring will not go.

Description of the piston group Stihl 180 chainsaw

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

The inner surface of the cylinder should be perfectly sanded and have a glossy shine, which you should pay attention to when buying a spare CPG for the stihl ms chainsaw. If there is damage on the inside of the cylinder, it is not necessary to install such a cylinder.

A distinctive feature of the CPG on the Stihl MS 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 compression in the engine, thereby improving start-up.

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 it correctly and follow a certain algorithm of actions. It is also necessary to have a small slotted screwdriver, a special Stihl combination wrench, a power screwdriver, a hammer, a drift of soft material, a compressor and a stopper for the Stihl piston.

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

  1. The top cover is removed from the saw and the spark plug is twisted.
  2. The side cover is removed.
  3. Using a power screwdriver, the stoppers are removed from the shock absorbers of the chainsaw, after which its handle is disconnected from the body.
  4. Next, you need to remove the drive sprocket and starter.
  5. Install the piston stopper in the spark plug hole and loosen the flywheel mounting nut and clutch.
  6. Remove the flywheel, clutch and oil pump worm gear mechanism located behind the clutch.
  7. Loosen the two screws securing the carburetor and air filter. Remove the filter, engine control lever and Stihl carburetor.
  8. Remove ignition coil and muffler.

After all these operations are carried out, it is necessary to once again clean the saw from dirt, then turn it upside down and unscrew the four screws securing the engine to the chainsaw body. Having unscrewed the screws, the engine is separated from the housing and cleaned again.

On the removed engine, the pan is untwisted and the pallet is 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.

Then, 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, and then mount the lock rings of the piston pin, while arranging them so that the break point of the lock ring is directed down. This is necessary in order to exclude the possibility of spontaneous popping of the retaining ring during engine operation (according to the manufacturer’s instructions Stihl). After that, compression rings are installed, the cylinder is lubricated with engine oil and the engine is assembled.

Read more:  How to Start a Stihl Ms 180 Chainsaw

The installation of the piston in the cylinder must be carried out with the utmost care, since the compression rings are brittle and break easily.

The crankcase is mounted on the engine, sealant is used as a gasket, after which four mounting screws are mounted and tightened crosswise. Next, the engine is mounted on the chainsaw body. Subsequent assembly is performed using the reverse disassembly algorithm.

Why Stihl chainsaw does not start after replacing a piston

If the saw does not start after replacing the piston, 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 a chainsaw, the masters 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 be hidden in the 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 work on replacing the piston is carried out correctly, the tool should start and work normally without any problems.

Video

In the video you can see 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 to properly clean the saw during the repair process.

Summary

We examined the main causes and malfunctions of the Stihl ms 180 chainsaw in which the replacement of the CPG is necessary. But, as a rule, in each case, the reasons may intersect, and for proper repair, an integrated approach to solving the problem is needed. Putting a new piston on the saw does not always mean solving the problem. It is imperative to eliminate the causes of the malfunction and the tool will last for a long time without problems and the need for repairs.

Independent chainsaw repair possible if you follow the instructions

Among the household equipment of the owner of a private house, there must be a chainsaw. an indispensable thing in the household, if you need to cut firewood, cut dry branches on garden trees or even a whole tree.

Related posts

In recent years, Stihl has been the market leader in gardening technology. Chainsaws of the company have an affordable price in the region of 7000-8000 rubles and high enough quality for such a price. Therefore, they were adopted not only by residents of the private sector, but also by lumberjacks and public utilities for land improvement. Unfortunately, even high-quality equipment over time develops its resource and requires the replacement of individual components. Chainsaw repairs often have to be done on their own, as breakdowns generally begin after the warranty period.

Major breakdowns

Before you hand over a broken chainsaw to a repair service, you should try to identify a breakdown yourself and possibly fix it. To do this, there is a manual for repairing a chainsaw, which is always included in the package. You can find answers in it, how to perform repairs in cases when:

  • the chain broke;
  • the saw does not start;
  • the saw starts and the battle stalls;
  • The chainsaw works, but not at full power.

One of the most important parts of any chainsaw is the cylinder-piston group (CPG), which transmits rotational motion to the drive sprocket. Despite the reliability of this unit, most models require diagnostics and repairs over time. It is the performance of the CPG of the chainsaw that determines the power of the unit, its ease of starting, the presence of idling and the consumption of the fuel mixture.

Causes of Piston Chainsaw Problems

There are many reasons for the failure of the CPG, which can be divided into two main categories: natural wear and tear. The first type of malfunction, as the name implies, is the physical wear of the rubbing parts of the piston group. The second category is more extensive and implies:

Video: How to Put a Piston On a Stihl 180


Elements of a piston chainsaw

  • severe overheating of the internal combustion engine and, as a result, the appearance of thermal seizures on the piston surface;
  • breakdown of the lower part of the piston (skirt) due to the duration of the chainsaw at maximum speed;
  • ingress of foreign particles into the combustion chamber and the occurrence of mechanical damage to the CPG;
  • breakdown of the compression (piston) ring due to heavy wear or exceeding the permissible revolutions of the saw;
  • mismatch of the recommended servings of gasoline and oil when preparing the fuel mixture.

Worn Chainsaw Piston

Experts do not recommend disassembling a CPG without any particular reason. However, if the tool has significantly lost power, a metallic ringing has occurred in the internal combustion engine or the crankshaft does not crank when the starter jerks, a piston chainsaw should be diagnosed. First of all, to identify engine problems, it is necessary to measure the compression in the cylinder. With a significant deviation from the values ​​recommended by the manufacturer, we can safely say that there are scratches, working out, and scuffing on the surface of the cylinder or piston. It is the drop in compression that is the basis for the complete disassembly and repair of the piston group of the chainsaw.

For the on-line diagnostics of the CPG for breaking the compression ring of the chainsaw or scoring in the cylinder, professionals advise removing the muffler and assessing their condition through the exhaust window.

Chainsaw Piston Group

The dimensions of the cylinder-piston group are determined primarily by the diameter of the piston made of heat-resistant aluminum alloy. Regardless of the model, the CPG of a chainsaw consists of a cylinder, a piston, a holding finger and two clamps.

Chainsaw Cylinder Mirror

When buying a piston chainsaw, you should pay attention to the inner surface of the cylinder, which should be polished and have a glossy shine. In the presence of damage, scratches, experts do not recommend installing such a cylinder.

In order to increase compression in the working unit and, as a result, increase power, many manufacturers install two piston rings. The compression rings of the chainsaw made of special cast iron fit snugly against the cylinder, as a result of which the tightness of the combustion chamber is ensured.

Read more:  Carburetor "Stihl Mm 55" Shoe.

Piston Chainsaw Replacement Algorithm

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

  1. Dismantling the upper protective cover;
  2. Unscrewing the spark plug;
  3. Side cover removal;
  4. Using a large flat screwdriver, the stoppers are removed from the shock absorbers;
  5. In the channel of the candle we put a lace to fix the crankshaft and unscrew the clutch and the flywheel nut;
  6. Dismantling the drive chain sprocket;
  7. We remove the carburetor with an air filter;
  8. Remove the ignition module and exhaust system.

After removing from the base of the power unit, unscrew the pan and remove the crankshaft with the piston from the cylinder. Using a pair of tweezers or a screwdriver, dismantle the piston pin stops.

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

Sealant for fixing the chainsaw chainsaw

Before starting assembly, it is necessary to clean the parts and components of the unit from dirt, residues of sawdust, 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 finger, which is supplied with the CPG. In order to prevent arbitrary loss of the retaining rings, it is recommended to install them 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, lubricate the piston with oil. Before installing the crankcase (pan), 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 above algorithm.

Often replacing the piston of a chainsaw, crankshaft and compression rings solves the problems with idling and the problematic start of the engine.

The trimmer for giving

Stihl 180 Piston Panel Replacement

How to change a piston on a Stihl 180 chainsaw

The main malfunctions of the Stihl ms 180 chainsaw are related to the piston group. Let us see the main prerequisites for which the piston needs to be changed. Let us give a description of the piston and its substitution method.

IMPORTANT. An experienced electrician has leaked the secret to the network how to pay half the price of electricity, the legal way. Read more

When you need replacement piston

Circumstances under which the piston needs to be changed, in general, is one hundred percent piston, and possibly enough, however, what remains for our client to do is to divide them into natural ones and seeming as a result of incorrect operation. Natural, this is the wear and tear formed due to the long-term operation of the Stihl 180 chainsaw. Artificial is not easy, for example:

    motor overheating and the occurrence of thermal scoring;

It is necessary to carry out the diagnostics of the CPG when if the Stihl ms 180 abruptly lost power, in other words, it does not start, while the tool starter does not crank. If the passage if the starter turns, but the saw does not start, here of course the spark and fuel enter the cylinder correctly, you need to measure the compression in the engine.

If there is a suspicion of an obstacle with a CPG, it is better to contact a service center authorized by the manufacturer, since it is exclusively possible to diagnose the fault without a full analysis and to make high-quality repairs as necessary.

Read the same

9.5. 11 Atm. It is considered a common indicator when the Stihl chainsaw starts up regularly and gives out the highest power, if the compression is lower, there is a possibility that there are bumps on the cylinder-piston group, or its wear is quite large. As a result, with reduced compression, for the upcoming diagnosis, you need to completely disassemble the saw.

You can find the presence of scuffing on the piston, as well as a breakdown of the piston ring, if you remove the muffler and conduct a visual inspection of the visible part of the piston, here you can check the elasticity of the ring by pressing on them with a small screwdriver. On the working rings there will be little walking, a defective or pinched piston ring will not go.

Description of the piston group Stihl chainsaws 180

On a Stihl 180 chainsaw, the piston group has a diameter of 38 mm. The dimension of the CPG chainsaw is determined by the diameter of the piston, the cylinder is a bit complicated. In the complete set, the standard ЦПГ MS 180 is delivered complete with a piston pin, 2 piston rings and 2 retainer rings.

Replacing piston group Stihl 180.

The inner surface of the cylinder must be perfectly polished and have a glossy shine, where you need to pay attention to the issue of purchasing a spare CPG for a stihl ms chainsaw. If there is damage on the inside of the cylinder, it is not necessary to install such a cylinder.

Replacement piston group chainsaw Stihl MS180

Here we will show you how to perform the video piston group replacement on a chainsaw Stihl MS180, 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 operations, enhance its cooling and increase compression in the engine, thereby improving start-up.

How to change a piston on a Stihl 180 chainsaw

If you want to replace the old piston and install the latest, you should know how to do it correctly and follow a certain method of action. You also need a small slotted screwdriver, a special Stihl combination wrench, a power screwdriver, a hammer, a drift of soft material, a compressor and a stop for the Stihl piston.

Read more:  Bosch Gsr 180 Li Review

Getting started on replacing the piston as it is also called piston group assembled, the chainsaw needs to be cleaned of maximum pollution. Further, the work is carried out according to the following method:

  1. The top cover is removed from the saw and the spark plug turns out.
  2. The side cover is removed.
  3. Using a power screwdriver, the stoppers are removed from the shock absorbers of the chainsaw, after which its handle is disconnected from the body.
  4. Next, you need to remove the driven sprocket and starter.
  5. Install the piston stopper in the spark plug hole and loosen the flywheel mounting nut and clutch.
  6. Remove the flywheel, clutch, and oil pump worm gear mechanism located behind the clutch.
  7. Loosen the two screws securing the carburetor and air filter. Remove the filter, engine control lever and carburetor Stihl.
  8. Remove ignition coil and muffler.

If such operations are carried out, you need to clean the saw from dirt again, then turn it upside down and unscrew the four screws that secure the motor to the chainsaw body. Having unscrewed the screws, the engine is separated from the body and further cleaned.

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

The main malfunctions of the Stihl ms 180 chainsaw are related to the piston group. Let us see the main prerequisites for which the piston needs to be changed. Give a description piston and the method of its substitution.

IMPORTANT. An experienced electrician has leaked the secret to the network how to pay half the price of electricity, the legal way. Read more

When to replace a piston

You will like a lot of circumstances for which the piston needs to be changed, in general, and for one hundred percent piston, but our client is left to divide them into natural ones that seemed at the end of the incorrect operation. Natural, this is the wear and tear formed due to the long-term operation of the Stihl 180 chainsaw. Artificial is not easy, for example:

    motor overheating and the occurrence of thermal scoring;

Diagnostics of the CPG is necessary if the Stihl ms 180 has sharply lost power otherwise it will not start, while the tool starter does not crank. If the passage if the starter is cranking, alas, the saw does not start, with all this there is a spark and fuel enters the cylinder correctly, you need to measure the compression in the engine.

If there is a suspicion of problems with the central processing unit, it is better to contact a service center authorized by the manufacturer, since only there are variations in it without a full analysis to accurately diagnose the malfunction and if it is necessary to carry out high-quality repairs.

9.5. 11 Atm. It is considered a common indicator when the Stihl chainsaw starts up regularly and gives out the highest power, if the compression is lower, there is a possibility that there are bumps 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.

You can find the presence of scuffing on the piston, as well as breaking the piston ring, if you remove the muffler and conduct a visual inspection of the visible part of the piston, while there is an option to check the elasticity of the ring by pressing a small screwdriver on them. On the working rings there will be little walking, a defective or pinched piston ring will not go.

Description piston group Stihl chainsaws 180

On a Stihl 180 chainsaw, the piston group has a diameter of 38 mm. The dimension of the CPG chainsaw is determined by the diameter of the piston, the cylinder is a bit complicated. In the complete set, the standard ЦПГ MS 180 is delivered complete with a piston pin, 2 piston rings and 2 retainer rings.

The inner surface of the cylinder must become completely polished and have a glossy shine, where you need to pay attention when buying a spare CPG for a stihl ms chainsaw. If there is damage on the inside of the cylinder, there is no need to install such a cylinder.

Replacing the piston group on a Stihl MS180 chainsaw

In this video we will show you how to perform piston replacement chainsaw chains Stihl MS180, crankshaft oil seals.

Hallmark of the CPG on Stihl MS 180 will be that he has two compression rings installed, although in fact all of his 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 operations, enhance its cooling and increase compression in the engine, which improves start-up.

How to change a piston on a Stihl 180 chainsaw

As you need to replace the old piston and install the latest, you should know how to do it correctly and follow a certain method of action. You also need a small slotted screwdriver, a special Stihl combination wrench, a power screwdriver, a hammer, a drift of soft material, a compressor and a stop for the Stihl piston.

Getting started on replacing the piston either piston group assembled, the chainsaw needs to be cleaned of maximum pollution. Further, the work is carried out according to the following method:

  1. The top cover is removed from the saw and the spark plug turns out.
  2. The side cover is removed.
  3. Using a power screwdriver, the stoppers are removed from the shock absorbers of the chainsaw, after which its handle is disconnected from the body.
  4. Next, you need to remove the driven sprocket and starter.
  5. Install the piston stopper in the spark plug hole and loosen the flywheel mounting nut and clutch.
  6. Remove the flywheel, clutch, and oil pump worm gear mechanism located behind the clutch.
  7. Loosen the two screws securing the carburetor and air filter. Remove the filter, engine control lever and Stihl carburetor.
  8. Remove ignition coil and muffler.

When these operations are carried out, it is necessary to further clean the saw from dirt, then turn it upside down and remove the four screws securing the motor to the chainsaw body. Having unscrewed the screws, the engine is separated from the body and cleaned again.

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