How to install a piston in the cylinder of a Shtil 180 chainsaw

When is a piston replacement necessary?

There can be quite a lot of reasons why a piston needs to be replaced, as well as a complete piston system, but all of them can be divided into natural ones and those resulting from improper operation. Natural, this is wear and tear formed due to prolonged use of the Shtil 180 chainsaw. There are much more artificial ones, for example:

overheating of the engine and the appearance of thermal seizures;

entry of a foreign body into the cylinder and the appearance of mechanical scoring;
piston ring breakage as a result of exceeding maximum engine speed;
piston skirt failure due to over-revving;
the use of low-quality fuel, as a result of which the piston group of the chainsaw wears out on the side of the inlet channel in the cylinder;
operating a Shtil chainsaw with a dirty fuel filter, resulting in a decrease in the percentage of oil in the fuel mixture;

It is necessary to diagnose the CPG if the Shtil ms 180 suddenly loses power or does not start, while the starter of the tool does not turn over. If the starter turns, but the saw does not start, there is a spark and fuel flows into the cylinder properly, it is necessary to measure the compression in the engine.

If you suspect problems with the CPG, it is advisable to contact a service center authorized by the manufacturer, since only they can accurately diagnose the malfunction without a complete disassembly and, if necessary, carry out high-quality repairs.

9.5 – 11 Atm. is considered a normal indicator at which the Stihl chainsaw starts properly and produces 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 diagnosis, it is necessary to completely disassemble the saw.

You can determine the presence of scuffs on the piston, as well as a broken piston ring, by removing the muffler and conducting 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 movement on the working rings; a defective or jammed piston ring will not move.

Checking the spark on the spark plug and eliminating the causes.

The first step in finding the reasons why a gasoline saw does not start is to check the spark on the spark plug. There are many factors that influence the operation of this element. However, the main ones at the initial stage of tool troubleshooting are:

Incorrect carburetor adjustment;
The presence of more than the required amount of oil in gasoline;
Air filter clogged.

All of them contribute to the formation of carbon deposits on the spark plug electrodes. In 50 cases out of 100, saws do not start when cold due to the lack of a spark due to carbon deposits on the electrodes and their corrosion. The result is either a decrease in the gap or an increase in it.

Checking for spark is quite simple. To do this you will need:

Remove the tip of the high-voltage wire;
Unscrew the spark plug;
Put the tip back on;
Place the candle skirt against the cylinder;
Start with the starter.

If at the moment the chainsaw engine starts, a good spark is observed between the electrodes, then everything is in order with the ignition unit. If it is not there, then it is worth cleaning the element itself and checking the electrode gap. If necessary, use a special probe to adjust the distance between the contacts.

For spark plugs from different manufacturers, the distance between the electrodes may vary. For some it may be equal to 0.5 mm. Others have 0.2 mm. Therefore, carefully study the manufacturer's recommendations.

There may be no spark at the spark plug for other reasons. The main malfunctions that affect poor starting of the chainsaw and unstable operation of the internal combustion engine at idle, which can cause the tool to stall, include the following:

Overfilling of the spark plug channel with fuel;
Lack of contact between the high-voltage cradle and the tip of the spark plug;
Failure of the ignition unit.

How to start a cold chainsaw if the spark plug channel is constantly flooded with gasoline? You can fix the problem while starting the tool using the following algorithm:

Unscrew the spark plug with a special wrench;
Wipe it with a clean and dry cloth;
Dry for 20...30 minutes;
Remove carbon deposits with a file and adjust the gap between the electrodes;
Drain the remaining fuel from the spark plug channel and dry it;
Collect everything and try to start the mechanism.

Dry candle. Apparently, the fuel mixture will not get into the cylinder. The problem is not in the spark plug, so we screw the spark plug back in. And we check the fuel supply system.
A wet, heavily fuel-stained spark plug. The reason for excess fuel is hidden either in violation of the model factory rules, or in incorrect carburetor adjustment.
The candle was covered with black soot. This may indicate the use of low-quality oil (so use only original oil for your saw), an incorrectly adjusted carburetor, or an incorrectly prepared fuel mixture. The spark plug needs to be washed, thoroughly cleaned of carbon deposits with an awl or a needle, the electrodes should be wiped with sandpaper and screwed into place.

Description of the piston group of the Shtil 180 chainsaw

The chainsaw has a calm 180, the piston group has a diameter of 38 mm. The dimension of the chainsaw CPG is determined by the diameter of the piston; 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 polished and have a glossy shine, which is something you need to pay attention to when purchasing a spare CPG for a stihl ms chainsaw. If there is damage to the inside of the cylinder, the cylinder does not need to be installed.

A distinctive feature of the CPG on the Shtil MS 180 is that it has two compression rings, while almost all of its main competitors have only one. According to the manufacturer, installing a pair of rings allows you to better stabilize the piston in operation, enhance its cooling and increase compression in the engine, which improves starting.

Why are there three rings on the piston?

The two top rings, mounted in the piston grooves, are needed to maintain compression. In the figure, these elements are indicated by the numbers “1” and “2”. And the lower ring, marked “3”, is an oil scraper:

Less than 3 rings per piston, not used in 4-stroke internal combustion engines

When the engine is running, the parts heat up, the metal expands from the heat, and the size of all gaps decreases. If the gap between the ends of the ring is less than that recommended by the manufacturer, then after heating such a ring scratches the cylinder walls. Measurements must be carried out without heating the part, and the ring itself must be placed in the cylinder:

The gap cannot be measured without access to the cylinder block.

Use special feeler gauges (strips) to determine the size of the gap. Typically recommended values are in the following ranges: 0.2-0.5 mm. However, be sure to check out the documentation!

How to change the piston on a Shtil 180 chainsaw

If it is necessary 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 to have a small slotted screwdriver, a special combination Stihl wrench, a power screwdriver, a hammer, a drift made of soft material, a compressor and a stopper for the Stihl piston.

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

The top cover is removed from the saw and the spark plug is unscrewed.
The side cover is removed.
Using a power screwdriver, the stopper is 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 into the spark plug hole and unscrew the flywheel mounting nut and clutch.
Remove the flywheel, clutch and oil pump worm drive mechanism, which is located behind the clutch.
Unscrew the two screws securing the carburetor and air filter. Remove the filter, engine control lever and Stihl carburetor.
Remove the ignition coil and muffler.

After all these operations have been completed, you need 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. After removing the screws, the engine is separated from the housing and cleaned again.

With the engine removed, the pan is unscrewed and removed, after which the piston assembly with the crankshaft is removed from the engine.

When removing the piston from the cylinder, you need to 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, and then mount the piston pin retaining rings, positioning them so that the place where the retaining ring breaks is directed downward. This is necessary in order to eliminate the possibility of the locking ring spontaneously popping out when the engine is running (according to the Shtil manufacturer’s instructions). After this, 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 the utmost care, since compression rings are fragile and easily break.

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

Oil supply system repair

If there is no oil supply to lubricate the chain, it is necessary to diagnose the entire system and determine the reason why the oil is not supplied. There may be several main reasons:

Clogged oil filter or oil system;
Missing thread on the oil pump worm gear;
Blockage or malfunction of the pump itself;
Depressurization of the oil system (there will be oil leaks on the bottom of the chainsaw).

To check the threads on the worm drive of the oil pump, you will need to remove the chainsaw drive sprocket and unscrew the clutch. To do this, the spark plug is unscrewed and a piston stopper is installed in its place, thereby ensuring reliable fixation of the tool’s crankshaft from turning.

Next, remove the cover from the side of the bar of the Shtil 180 chainsaw, and using a screwdriver, remove the retaining ring holding the drive sprocket, after which the sprocket itself is removed.

The clutch is untwisted using a 19mm socket and a wrench. It is necessary to unscrew the clutch clockwise, since the thread is left-handed. There is a reflective plate behind the clutch, this also needs to be removed. The next part is the worm drive of the oil pump. Having examined and discovered the absence of a plastic thread, you can safely throw out the part and install a new one in its place, since it is impossible to restore it. Assembling the Shtil 180 chainsaw is carried out in the reverse order.

If the gear is in normal condition, disassembling the saw continues; for this, the corkscrews are removed from the shock absorbers, the rear handle is untwisted and the throttle control rod is disconnected, after which the handle block is removed from the shock absorbers using a powerful slotted screwdriver.

It is necessary to remove the handles to provide access to the bottom where the oil pump is installed.

At the next stage, the oil hose coming from the oil tank is removed from its seat on the body and the line is checked for blockages by supplying air through the oil hose into the oil tank body. If a blockage is detected, it must be cleaned; if this is not possible, the faulty hose must be replaced.

Next, the oil pump is removed from the body of the Shtil 180 chainsaw and washed in gasoline.

After repair, we assemble the Stihl 180 chainsaw in the reverse order. An important point is to seal the oil hose at the installation site, into the seat on the housing. It is necessary to rinse the hose and the hole for its installation with gasoline, then blow with compressed air until completely dry and coat it with sealing oil-resistant sealant, and then install it in place.

Why does the Stihl chainsaw not start after replacing the piston?

If the saw does not start after replacing the piston, it is necessary to check the fuel supply to the chamber and also diagnose the ignition system. Very often, when installing the control lever on a chainsaw, 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.

The problem may also be hidden 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 to replace the piston is carried out correctly, the tool should start and work normally without any problems.

Troubleshooting muffler problems

If the chainsaw engine operates normally at low speeds, but starts to stall and smoke at high speeds, the problem may be hidden in the muffler.

To check the quality of its work you should do the following:

dismantling (with mandatory closing of the outlet);
disassembly (if the muffler is dismountable);
cleaning from carbon deposits using special detergents or the dry method;
drying (using a hair dryer);
reassembly and installation.

To prevent clogging of the muffler during operation of the chainsaw, you should carefully monitor the composition of the fuel mixture and the quality of its components.

Results

We examined the main causes and malfunctions of the Shtil ms 180 chainsaw, which require replacing 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 necessary. 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 serve for a long time without problems or the need for repair.

Source

Replacing the piston group of the Stihl MS-180 chainsaw

The sequence and chronology of how to remove the clutch on a chainsaw is the same for all tools, but there may be several reasons for its failure. This is a burst spring, the same spring can leave its place or a piece can break off from the clutch plate, and its most traditional wear.

Removing a problematic part from a Chinese saw in order to install a new one is not at all difficult. You just need to follow the advice of the KosiKosa store specialists to do everything right.

The petrol tool store gives practical recommendations, supported by videos and diagrams, but also offers to buy new spare parts in the context of its catalog. The user of any type of chainsaw needs to know that the clutch weights, when operating at idle speed, still rotate with the crankshaft, without touching the drum itself.

Under the influence of centrifugal force, when the tool begins to pick up speed, and its number exceeds 4000 revolutions in 1 minute, these loads activate the clutch and it transmits movement to the saw set from the engine.

In any working situation, the part in question may become unusable completely or a separate part of it, so we will demonstrate how to remove it and replace it with a new one.

When is a piston replacement necessary?

There are a lot of reasons why the piston needs to be changed, and one hundred percent of the piston, but our client can only divide them into natural ones and those that appeared after incorrect operation. Natural, this is wear and tear formed due to long-term use of the Shtil 180 chainsaw. Artificial ones are not easy, for example:

overheating of the motor and the occurrence of thermal seizures;

It is necessary to diagnose the CPG if the Shtil ms 180 suddenly loses power, otherwise it will not start, and the starter of the tool does not turn over. If the passage and the starter turns, alas, the saw does not start, although there is a spark and fuel flows into the cylinder properly, 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 without a full analysis to accurately diagnose the fault and, if necessary, carry out high-quality repairs.

9.5 – 11 Atm. is considered a common indicator when the Stihl chainsaw starts up properly and produces the highest power; if the compression is lower, there is a possibility that there are snags on the cylinder-piston group, or its wear is quite large. Under any circumstances, with reduced compression, for future diagnostics, you need to completely disassemble the saw.

You can find the presence of scuffs 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; however, there is an option to check the rings for elasticity by pressing on them with a small screwdriver. There will be little movement on the working rings; a defective or pinched piston ring will not move.

How to repair a Shtil chainsaw with your own hands

Main types and diagnosis of defects, tools for their elimination
Fuel supply system malfunction
Elimination of defects in the trigger mechanism
Malfunctions of the cylinder-piston group of the chainsaw
Malfunctions in the lubrication system and their elimination

Read also: How to make a guide for a jigsaw
With all the variety of modern building materials, wood species remains very important. That’s why woodcutters, landscaping workers, and summer residents are interested in woodworking tools, including chainsaws.

The Shtil chainsaw is easy to use, inexpensive, reliable, and has a long service life.

Different people prefer different brands. Someone is interested in the Partner chainsaw, someone is interested in the Shtil brand device, someone is interested in something else. But they all break down periodically, and their breakdowns are both similar and different. Next, we’ll look at repairing a Shtil chainsaw with our own hands.

This brand is well known both among experts and among individuals involved in arranging their own living space. The great popularity of the Stihl chainsaw determines the frequent practical use of this tool and forces us to find methods to effectively combat its usual breakdowns.

Useful tips from Kosi Kosa specialists

KosiKos specialists described the procedure for removing the clutch on a chainsaw step by step. The article also includes a high-quality video so that the user of the tool can imagine all the nuances in detail. Pay attention to how to lock the piston, in what position it should be so that other parts and your actions do not set it in motion. It is also important not to provoke the movement of the starter, not to break it when installing a new clutch and dismantling the old element.

In addition to the main process of “replacing the clutch,” service specialists and specialized stores will give several important tips in the general scheme of the procedure:

When stopping the piston, it is necessary that it passes through the purge windows and carburetor windows before reaching bottom dead center. The piston rests against a rope (or rope), and the latter does not hit, for example, the exhaust windows;
Remember that all clutches have left-hand threads. It doesn’t matter whether the saw model is a professional one or a household one;
before removing the clutch (also known as the clutch drum), it is worth wiping all those places on the saw where the parts were removed - from dust and dirt, which may later be harmful to you;
before threading a rope or rope with knots into the piston zone, it must first be moved to the top dead position, then lowered slightly;
between the clutch and the drive sprocket cup - some models contain a washer part. After disassembly, it must be installed in the same position as it was. This is often the area between the cup and the engine;
In some models of chainsaws, the oil pump drives contain a special spring. It is this part that transmits rotation from the star to the oil pump. If it is installed incorrectly, the oil pump will not supply lubricant to the chain and saw set;
it is important to remove a rope with knots or a thick rope after carrying out work, and in their context do not forget to leave part of the element outside;
Please note that Husqvarna saws only have a single clutch spring and two weights attached to it. Shtil already has three springs and three weights. The latter are also called sectors. This must be taken into account when replacing a part, since the opposite option will not perform its functions, or the saw will not start at all.

Description of the piston group of the Shtil 180 chainsaw

The chainsaw has a calmness of 180, the piston group has a diameter of 38 mm. The dimension of the chainsaw CPG is determined by the diameter of the piston; the cylinder is a bit difficult. The standard MS 180 CPG comes complete with a piston pin, 2 piston rings and 2 retaining rings.

The inner surface of the cylinder must be completely polished and have a glossy shine, which is where you need to pay attention when purchasing a spare CPG for a stihl ms chainsaw. If there is damage to 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 replace the piston

groups on a Stihl

MS180, crankshaft oil seals.

How to change the piston on a Shtil 180 chainsaw

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

When starting work on replacing the piston or piston group assembly, the chainsaw must be cleaned of contaminants 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.
The side cover is removed.
Using a power screwdriver, remove the stopper 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 into the spark plug hole and unscrew the flywheel mounting nut and clutch.
Remove the flywheel, clutch and worm drive mechanism for the oil pump, which is located behind the clutch.
Unscrew the two screws securing the carburetor and air filter. Remove the filter, engine control lever and Shtil carburetor.
Remove the ignition coil and muffler.

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

With the engine removed, the pan is unscrewed and removed, after which the piston assembly with the crankshaft is removed from the engine.

Home page » Replacing the piston on the Shtil 180 chainsaw

Malfunctions of the pump and the system as a whole

As you know, nothing lasts forever in this world and everything has to be repaired over time.
The oil system of the Shtil ms 180 is no exception, and has its own specific malfunctions. Let's take a closer look at them. Signs of a malfunctioning lubrication system are as follows:

the chainsaw chain is absolutely dry and does not shine;
oil does not leave the oil tank;
the chain stretches quickly and this happens constantly;
the saw bar moves to the side when sawing;
The tire also heats up in the area of the drive sprocket and the paint melts.

All these signs directly or indirectly indicate problems in the chainsaw chain lubrication system.

The first thing to do after you suspect that chain lubricating oil is not being supplied is to check its supply. There are two ways to do this. The first is described in detail in the instructions for the tool and consists in the fact that you need to start the chainsaw, increase the gas as much as possible and point it towards any obstacle.

If the lubrication system is working properly, the oil will fly off from the tip of the tire and a strip of oily drops will appear on the surface towards which the tire is pointed. If there are still violations in the system, the surface will remain clean.

The second way is to remove the tire from the chainsaw and start it. When the engine speed increases, oil will flow from the oil channel at the tire shank installation site; if this does not happen, it is necessary to look for the cause of the malfunction.

Diagnostics

Diagnostics should begin with inspecting and checking the oil receiver (filter) of the Stihl 180 saw. As a rule, if the filter is very dirty, the oil supply may stop.

Next, you need to remove the drum sprocket and check the condition of the drive gear. The thread on it must be clearly defined, not licked or have any other defects; also, when the gear is removed, it is necessary to check the wire lever. It must press the gear tightly and not turn, otherwise the gear stands still and does not transmit force to the pump, as a result of which the oil supply stops.

If all of the above methods to detect and eliminate faults do not produce results, it is necessary to use extreme measures, i.e. dismantle the pump.

How to remove the pump

The oil pump is installed on the right side of the bottom of the housing, in the same place an oil line coming from the chainsaw tank is connected to it. To remove the pump, you will first need to release the saw from the handle; to do this, unscrew the rear handle of the unit and disconnect the throttle control rod. At the next stage, you need to remove the handle shock absorber plugs and, using a powerful slotted screwdriver, squeeze them out of their seats on the handle.

After the handle is removed, the chainsaw body is turned upside down. The hose leading from the oil tank to the pump will be immediately visible. It must be removed from its seat.

To better understand the process of removing the pump, you can watch the video below. In the video, the service center master shows in detail how to remove the oil pump from a chainsaw, and also describes the main malfunctions of the supply system.

After the pump is removed, it must be cleaned and purged. As a rule, the main failure of the oil pump is its blockage. Having eliminated it, you can install the pump in place.

Replacing the pump is only required if it is not possible to remove the blockage.

The reason for oil leaks on the bottom of the chainsaw

The Shtil 180 chainsaw has a characteristic malfunction, which consists in insufficient sealing of the installation site of the oil hose in the chainsaw body and the appearance of a leak at this point. To eliminate it, just remove the handle of the Stihl MS 180 saw, disconnect the hose itself, wash and degrease the seat in the body and the hose shank, then apply sealant and install the hose in place. This simple operation will reliably eliminate the malfunction and the oil will stop leaking.

When is a piston replacement necessary?

There can be quite a lot of circumstances for which the piston needs to be changed, both in general and one hundred percent of the piston, but all of them can be divided into natural ones and those that appeared as a result of incorrect operation. how to remove the clutch disassembling a chainsaw Shtil 180 oil on the chainsaw is not. Replacing the piston on a Shtil 180 chainsaw: when to change and how. Repairing a chainsaw starter, replacing the starter spring of a stihl ms 180 shtil 181 chainsaw. Repairing a stihl ms230 chainsaw, dismantling a stihl ms 180 chainsaw, part 1 replacing the piston group. Natural, this is wear and tear formed due to long-term use of the Shtil 180 chainsaw. There are even more artificial ones, for example:

overheating of the motor and the occurrence of thermal seizures;

entry of a foreign body into the cylinder and the occurrence of mechanical scuffing;
piston ring breakage as a result of exceeding the highest engine speed;
piston skirt failure due to over-revving;
the introduction of bad fuel, as a result of which the piston group of the chainsaw wears out from the side of the inlet channel in the cylinder;
operating a Shtil chainsaw with a dirty fuel filter, resulting in a decrease in the percentage of oil in the fuel mixture;

Advantages and disadvantages

Zama carburetors are very reliable and easy to use. Specifically, the Shtil 180 chainsaw has a carburetor, which does not have screws for adjusting the quality and quantity of the mixture, as we are used to. One screw makes adjustment much easier.

A diaphragm carburetor has no significant disadvantages. With such a carburetor, the chainsaw works in any position. For side cutting, vertical cutting, etc.

Despite the above-mentioned advantages, the carburetor is sensitive to fuel quality. In addition to clean air from the air filter, purified fuel from the gas tank must be supplied to the carburetor. But this is not always possible, so at least once every six months it needs to be cleaned and blown out.

The one on the right is the ORIGINAL.

A good tool is the key to quality and easy work. And a good spare part is the salvation of a good tool. By purchasing a bad analogue of a Chinese piston, you will ensure: Overheating of the cylinder at idle; rapid failure of the Chinese cylinder due to poor fuel; The short service life of a piston chainsaw is calm. So, how do we choose the highest quality spare part from a huge variety of piston parts? The piston group cylinder includes a piston pin, piston rings, and two stoppers. It is not recommended to assemble a piston from different kits. For example, if you replace the piston with an analogue one for the original piston stil 180, then it will not resemble the original one for a long time and scuffing will quickly appear. It is important that the crankshaft bearing fits tightly into the seat of the piston and pan. If the bearing fits freely into the seat without effort, then you need to choose another piston. The original is very easy to distinguish from the analogue. The original piston has various abrasions and has paint markings: brown, green, white. The original must also have the STIHL logo and name stamped on it. It is worth carefully inspecting the piston for the presence of chrome coating. On the third piston you can see that the chromium coating has unevenness and, therefore, we do not need such a piston for the saw. And finally, try, if you are allowed, of course, to scratch the cylinder with something and make sure there is welding. If everything scratches without any effort, then there is no chrome, just aluminum. Be sure to visually inspect the piston for casting defects. Everything should be smooth and without chipping the radiator fins. How long do the Chinese analogues of the piston for Shtil 180 last? There are many factors that need to be taken into account that affect the operation of a chainsaw. Simply replacing filters and refueling with high-quality fuel and oil will provide longer service life. Usually, according to personal observation and experience, analogues work fine, if you do not forget that the STILE 180 is a household saw and is not intended for professional work. An analog CHINESE piston machine, for large volumes of sawing wood, lasts on average for a year.

When is a piston replacement necessary?

The circumstances for which the piston needs to be changed, as in general, there are not many piston ones, you will like a lot, but our client remains divided into natural ones that do not appear after the end of improper operation. Natural, this is wear and tear formed due to long-term use of the Shtil 180 chainsaw. Artificial is still difficult, nettle:

overheating of the motor, no occurrence of thermal seizures;

It is necessary to carry out diagnostics of the CPG on the following criteria: if Shtil ms 100 eighty has sharply lost power, otherwise it will not start, and the starter of the tool does not turn over. If the starter turns over, but the saw does not start, a spark is immediately found and the fuel is not entering the cylinder properly, 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 it is only possible to accurately diagnose the problem without a complete disassembly of the computer, not if you need to carry out high-quality repairs.

Basic types and diagnostics of faults, tools for their elimination

Design of the Shtil chainsaw.

Before you begin disassembling a faulty mechanism, you should prepare the proper tools. Because a chainsaw is a relatively simple device at a technical level, this list is small and includes:

Screwdriver Set;
spanners;
set of socket wrenches;
igloo

In order to carry out a real high-quality restoration of the working condition of the Shtil chainsaw with your own hands, you need to accurately establish the preconditions for the breakdown. Since this chainsaw is a mechanism driven by an internal combustion engine, the main malfunctions are associated with this unit.

The most common faults encountered in operation of a Stihl chainsaw are the following:

no engine start;
unbalanced operation of the internal combustion engine immediately after startup, as a result of which, after short-term operation, the unit spontaneously turns off;
the running engine does not reach full power;
oil is leaking.

Shtil chainsaw carburetor design

Description of the piston group of the Shtil 180 chainsaw

The chainsaw has a calmness of 180, the piston group has a diameter of 30 eight mm. The dimension of the chainsaw CPG is determined by the diameter of the piston, the cylinder is a little difficult. Repair of Shtil chainsaw 180 chains with Pobeditovaya, for the most part, reviews of Shtil saws. The standard MS 100 eighty CPG comes complete with a piston pin, 2 piston rings and 2 retaining rings.

The inner surface of the cylinder should be completely polished and not have a glossy shine, which is where you should pay attention when purchasing a spare CPG for a stihl ms chainsaw. If the inside of the cylinder is damaged, the cylinder should not be installed.

Conclusion

The oil pump of the Shtil 180 chainsaw is a reliable and unpretentious part, which quite rarely causes a lack of chain lubrication. It is necessary to disassemble and replace the pump only as a last resort, when you are sure that the reason is 100% in it. You can do this yourself, as this operation is quite simple.

The Shtil chainsaw is a tool that is designed for harvesting wood, processing plants, creating landscape design and other household needs. If any parts break or the device fails, the Shtil chainsaw will need to be repaired.

Replacing the piston group on a Stihl MS180 chainsaw

Here in the video we will show you how to replace the piston

groups on a Stihl

MS180, crankshaft oil seals.

A distinctive feature of the CPG on the Shtil MS 100 eighty is that it has two compression rings installed, although not all of its main rivals have only one. As the manufacturer convinces, installing a pair of rings allows you to better stabilize the piston during operation, enhance its cooling without increasing compression in the engine, the implementation of which improves starting.

How to change the piston on a Shtil 180 chainsaw

If you want to replace an old piston and install a new one, you should know how to do it correctly and not follow a certain method of action. You also need to have a small slotted screwdriver, a special combination Stihl wrench, a power screwdriver, a hammer, a drift made of soft material, a compressor and a stopper for the Stihl piston.

When starting work on replacing the piston or another piston group assembly, the chainsaw needs to be cleaned of contaminants as thoroughly as possible. Further, the work is carried out according to the following method:

The top cover is removed from the saw and the spark plug is not turned out.
The side cover is removed.
Using a power screwdriver, the stopper is 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 into the spark plug hole and unscrew the flywheel mounting nut and clutch.
Remove the flywheel, clutch and oil pump worm drive mechanism, which is located behind the clutch.
Unscrew the two screws securing the carburetor and air filter. Remove the filter, engine control lever and Stihl carburetor.
Remove the ignition coil and muffler.

With the engine removed, the pan is unscrewed and removed, after which the piston assembly with the crankshaft is removed from the engine.

Basic types and diagnostics of faults, tools for their elimination

Stihl chainsaw design.

Before disassembling a faulty mechanism, you should prepare the necessary tools. Because it's a chainsaw. This is a fairly simple device technically, this list is small and includes:

Screwdriver Set;
Spanners;
Set of wrenches;
Igloo.

In order to carry out a real high-quality restoration of the working condition of the Stihl chainsaw with your own hands, you need to accurately establish the preconditions for the breakdown. Since this chainsaw concerns mechanisms driven by an internal combustion engine, the main malfunctions associated with this unit.

The most common faults with Stihl chainsaws are:

Failure to start the engine;
Unbalanced operation of the internal combustion engine immediately after starting, as a result of which, after short-term operation, the unit spontaneously turns off;
A running engine does not reach full power;
Oil leaks.

Stihl chainsaw carburetor design

It should be noted that the presence of traces of a certain characteristic in the place of sparks speaks very nicely about the sources of “disease” of the entire starting system. Such a source, namely, may be a carburetor. Thus, the complete absence of any signs of fuel on the spark plug (it is completely dry) most likely indicates that the fuel did not enter the combustion chamber through a complete blockage of the carburetor.

If gasoline is attached to the spark plug of the chainsaw, and the cutting device itself is working normally, then this means there is an excess of air-fuel mixture. The reason for this condition is apparently a malfunction in the carburetor settings, clogging of its nozzles, as well as improper starting of the mechanism. If a characteristic carbon deposit is fixed on the spark plug, we can speak with reasonable confidence about the improper functioning of the carburetor or the use of low quality gasoline.

Taking into account all the above signs displayed on the spark plug, it is necessary to remove the carburetor and check its technical condition. Stihl chainsaw one hundred and eighty repairing a clogged air filter. Breath testing and cleaning. Chainsaw

stihl ms 180-16. Replacement inspection of Stihl chainsaw one hundred and eighty Piston rings by size. If a blockage is found, the carburetor should be thoroughly cleaned, the device should be adjusted according to technological requirements and the gasoline used in the tank should be replaced. You should always remember that the carburetor. This is a rather complex assembly consisting of many small components, parts and channels. Therefore, its repair must be carried out with special care and precision.

In addition to restoring the carburetor, it is necessary to check the functionality of the spark plug itself on the stand and, if necessary, set the correct gap in it. If you are not happy with the spark plug and its performance, it is recommended to replace it with a new one.

Replacing the clutch on a chainsaw with your own hands

Replacing the clutch on a chainsaw goes through certain stages and they begin with the first preparatory stage:

The saw set must be removed with the utmost care and delicacy.;
after which - remove the cap from the air filter and the cover from the clutch;
lock the crankshaft. The process is mandatory in order to avoid rotation or the slightest movement at the moment when the clutch is unscrewed. We carry out the procedure using a wrench. With its help, two screws are turned into the rotor of the ignition complex, after first removing the cover of the manual starter.
You can also lock the crankshaft with your own hands in another way - by unscrewing the spark plug, then lower the piston to the bottom position, also called the “dead position” (or BDC), and fix it there by threading a rope into the hole where the spark plug was located;
Using the special key that came with the chainsaw, or the tool that came with the grinder, you can unscrew the clutch. This chainsaw body is fixed on the left thread, so, taking this factor into account, we unscrew it clockwise;
remove the drum and drive sprocket. Ideal care for a saw like Stihl or Husqvarna, Partner, and even on a Chinese saw the procedure is identical, when you have already replaced two tires on the saw, then it’s time to change the clutch drum;
We install a new part, you need to screw the new clutch all the way. We fix the clock in the reverse movement. Be sure to lock the crankshaft: when we tighten the starter, we may break it due to carelessness. The crankshaft stopper will help prevent this.
We assemble the saw in the reverse order of assembly, with the same accuracy and reverse sequence.
the clutch must be fixed completely and firmly. To do this, take the brake handle and point it forward.
Next, you need to start the file in normal mode and remove it from the brake.

All these recommendations must be carried out in strict order, not forgetting to highlight the details mentioned above. If you need spare parts for a chainsaw, the KosiKosa specialized store is pleased to offer its catalog.

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