Malfunction of the lubrication system or no oil supply to the chain

The guarantee of a long service life of a chainsaw can be not so much the power characteristics of the tool as the proper method of use and compliance with the rules of handling it. First of all, this concerns the chain. Proper care of it will help maintain its cutting quality for decades. It implies not only compliance with the technology of working with the tool, you also need to carefully select the oil for the chainsaw, which is recommended to be used regularly.

How to choose a chain

Studying their typology will help you choose a chain. Important criteria of distinction are:

1. Tooth pitch. This parameter is measured in inches. The most common sizes are 0.325, 0.375 and 0.404. Each of them is selected depending on the assigned tasks. The smaller the specified parameter, the lower the productivity will be, which means you won’t need to put in a lot of effort. Therefore, it is necessary to purchase a chain whose power would correspond to a chainsaw.
2. The thickness of the tail and drive link, which means the product can be selected for different tires. The 1.1 mm thick tail is found only on small chains for household saws. The most popular size is 1.3 mm. This model can be present even on semi-professional devices.
3. Depth of the cut and height of the profile. The performance of the device depends on this parameter. It is always possible to increase the value if you cut off the stops near each cutter. There are two options to choose from: 0.025” (0.635 mm) and 0.03” (0.762 mm). The presence of a high-profile chain makes the chainsaw aggressive and shaving. A product with a small tail pitch will help maintain a balance between high productivity and low vibration.
4. Chain length, bars and number of teeth. The choice of this parameter directly depends on the power characteristics of the chainsaw. Moreover, the best saws are not always characterized by an increased number of teeth and tire size.
5. Types of cutting links. Types of chains according to this characteristic: chisel and chipper. The first option is the most optimal due to the straight working surface, which allows you to cut evenly into the wood. It is difficult to sharpen such links, and if there are even very small deviations from the upper corners, the performance of the chain will be reduced. Chipper ones have worse cutting characteristics, but are more resistant to any kind of contamination and are easier to sharpen.
6. Sequence of links. A popular model is one with one cutting link and two tails. But non-standard options are also possible: with a semi-allowance - only one connecting link is inserted between every second pair of working teeth; with an allowance - the link is installed between all adjacent teeth. This allows you to reduce the cost. But at the same time, aggressiveness and performance decrease, and wear increases, including chainsaws.
7. Method of cutting material. Products with longitudinal and cross cuts allow you to guide the tire along and across the fibers, depending on the need. They differ in the angle of sharpening of the cutting links.

When to tighten the chain

You can determine that the main part of the chainsaw needs to be tightened by its appearance. At the bottom it hangs freely, but at the top it can become tilted to the side. If you continue to work with such a cloth, it begins to wear unevenly, gives an uneven cut and may tear during work.

Algorithm for tensioning a chain on a chainsaw

To adjust the shape of the web, tension the chain. The procedure is possible in several ways, quick and more complex. To make this easier, you need to move the tightening bolt clockwise until the chain slack is eliminated. A more complex method requires more time:

1. Find the place where the tire is attached to the body.
2. Unscrew the nuts and loosen the links by pulling the top edge.
3. Using a chain tensioner on a chainsaw, you need to tighten it to the desired level.
4. Check the tension level.
5. Secure the tire.

To replace the chain with a new one, place the tool on a table or workbench. Next, unscrew the tire, remove the old blade, and clean the base. The new structure is placed so that the links go in the opposite direction from the body. Then, using a tightening wrench, you need to tighten it to the desired level.

Checking and adjusting the mechanism should be carried out when the structure is cold. If you try to tighten it after work, the sprocket becomes deformed or other elements of the system fail.

Ways to check the degree of tension

After installing the chain or already during sawing, the master should periodically check how the chain is tensioned. There are several ways to do this. You need to try to manually move the links in a circle. They should move in both directions without effort or with slight resistance, but without signs of jamming or extraneous sounds. If the blade sticks, makes a creaking sound, or makes a friction sound, you can judge that it is tightened too tightly or is not working properly.

The second way to check the degree of chain tension is to, after adjusting in the middle of the bar, pull the link up. It should tighten, but come out of the groove where it is installed in the gutter by no more than 2/3 (3-4 mm). The canvas should not sag at the bottom.

If the tensioned chain passes all checks, you need to start the engine and let the saw idle. Then turn off the saw and check the tension again. If there is no sagging or jamming, the tool can be used for its intended purpose.

When to shorten or stretch a chain

If the test determines that the element is so slack that the adjusting screw does not help return it to normal, the only way to correct the situation is to shorten the chain. The specialist removes several links, no more than 2, until he reaches the desired length.

It may be necessary to stretch the chain, that is, add new links to it, if it is torn and some of the elements are lost. You can buy elements in the store or using a donor, an old chain

It is important to ensure that it is similar in thickness, link pitch and shape

It is not necessary to contact a specialized service for this purpose. You can also do extensions or shortening at home if you have the appropriate equipment. To work, you need a riveting and riveting machine, spare links, and rivets.

There are many reasons for chain stretching on a chainsaw, from breakdown of other elements of the system to violation of operating rules

In order not to bring the condition of the mechanism to a critical point, when expensive repairs are required, it is important to periodically check the degree of fit of the blade and eliminate defects at the initial stage. If necessary, you can extend or shorten the chain at home if you buy the appropriate equipment

How to install a chain

A long service life of the device is possible not only if the components for it are carefully selected, but the installation of the chain on the chainsaw must also be correct. In addition, sooner or later the chain may need to be replaced. In this case, it is necessary to think about safety, in particular, carry out work using special protective gloves. To “dress” the saw, you need to perform actions in the following sequence:

1. Prepare the surface for work. You can place the chain correctly on a table or other convenient and flat surface. Additionally, the surface can be covered with a rug.
2. The wing nut on the housing must be unscrewed, and then the sprocket cover must be removed.
3. The latter must be turned to the right all the way. After this, gradually put the chain on top of the bar, while it is better to start work from its top. At each stage, it is recommended to ensure that the chain is directed correctly.
4. Turn the chain so that the bar is on top of it. At this stage, the cutter located on the top of the tire should be facing forward, not to the side. This indicates that the direction of movement is correct and the location is accurate.
5. Place the tire on the sprocket.
6. After this, put the chain sprocket cover on the engine block, turn the wing nut until it stops, but do not completely tighten the sprocket cover.
7. Unscrew the clamping screw by turning it towards the top of the bar, while the chain links should fall into the corresponding recesses.
8. Tighten the wing nut until secure.
9. Check the part for sagging and tightness, and if necessary, tighten it further or loosen it.

Basic properties

When deciding what kind of oil to pour into a chainsaw, you first need to consider the required characteristics, taking into account the specifics of its functionality. First of all, this is the following set of properties:

• High adhesion.
• The presence of ingredients that prevent the formation of scuffing and rapid consumption.
• Subsequent decomposition under natural conditions.
• Compliance with ambient temperature. At positive temperatures, predominantly mineral compounds are used, and at negative temperatures, synthetic ones with frost-resistant additives are used.

The adhesive qualities of a lubricant are perhaps the most relevant among others. Since it will largely depend on how long the lubricant stays on the metal elements of the chain. In addition, oil with low adhesion will not envelop the entire surface of the chain - but due to inertial forces, it will simply fly off it, bypassing the lower part.

A chainsaw with a properly lubricated chain has high productivity. Source diz-cafe.com

During active use of the chainsaw, a huge portion of the oil used will simply fly out, ending up in the ground. Remaining with shavings in the soil cover, it will contribute to the deterioration of the ecological situation of the area. Therefore, many manufacturers today produce quickly decomposing compounds that do not harm the environment.

In addition to these criteria, there is a rule - to use lubricant components from the manufacturer that manufactured and launched the equipment itself. An example of this is Makita branded electric saw oil.

Why does the chain fly off and break?

If the chain falls off the chainsaw or it breaks, this means that there is some kind of problem with the device; under normal conditions it should not do this. There are three reasons why a chain falls off:

1. Tire problems. They lead to loosening of the tension, which can lead to the chain breaking. Most often, this problem occurs in the groove between the outer plate on the chain set housing and the inner plate on the motor housing. The casing with the tire is secured with a bolt, which can become loose during operation of the chainsaw, as a result of which the tire begins to move or vibrate. To solve this problem, you need to find and lower the chain brake, for which you need to turn the tension screw, which is located next to the tire, until it is fully tensioned.
2. The chain has stretched. Sagging may indicate a malfunction of the chainsaw mechanism. During operation, the metal is deformed, which means it can become 0.5-1 cm longer. In this case, it is recommended to replace or shorten the chain.
3. The drive sprocket is poorly secured. To secure it, you need to remove the engine protective cover and spark plugs, and then pull out the air filter. The spark plug itself also needs to be unscrewed, after which a special stopper is installed in its place to secure the piston. Turn the fastening disk clockwise until the piston stops in the uppermost position. A thick rope folded several times can act as a stopper. After fixing the piston, clamp the drive sprocket. Reassemble the chainsaw, installing all parts in the reverse order.

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Most problems can be solved by repair. Only in exceptional cases will it be necessary to change it.

First warnings during repairs

Chainsaw

consists of many parts. Let's highlight the main ones, such as:

• engine;
• fuel tank;
• ignition cable.

Since this is only a small part in a not very detailed description, it should be borne in mind that chainsaws are actually similar in their structure, which greatly simplifies their diagnosis and repair. Repairs can be very complicated if you do not contact a specialist in time and continue to operate the broken equipment. And it’s absolutely correct that in order to repair a chainsaw, it is best to contact a specialist, because the future “life” of your “irreplaceable Partner” at work depends on the repair.

So, when carrying out repairs, the master must check all the parts of the chainsaw, why it is disassembled into parts. In most cases, breakdowns arise from incorrect and careless operation of the device, which is why the fuel filter or breather often becomes clogged with sawdust. To diagnose a blockage, the technician disconnects the hose and inspects how the fuel flows.

Fuel may also be supplied in insufficient quantities. This happens because the air filter gets clogged, so it should be changed every three months.

One of the most important parts of a chainsaw is the spark plug, which also must be checked. Here are some possible causes of malfunction worthy of attention:

• dry candle;
• candle in oil;
• the candle may be covered in black soot.

If the spark plug is dry, it means no fuel is getting into the cylinder, and this, in turn, means that everything is in order with the ignition and the repairmen are looking for another problem. If the candle, on the contrary, is in oil, it means that there is excess fuel. In this case, you need to unscrew the candle and wipe it well, then put it back again. Dark carbon deposits on the spark plug means that while using it, the owner of the chainsaw mixed gasoline and oil in incorrect proportions. Be sure to check for the presence of a spark.

As we see, repairs are still not so simple and we still have almost everything ahead of us. The process of restoring the functionality of a chainsaw also includes certain processes for cleaning parts of this device, such as the muffler. Let's analyze this operation step by step. To begin with, as in any repair, we need to find this part of our device, remove it and disassemble it. If there is a lot of carbon on it, then we need to clean it, and for this we will need:

These items can be found in any home. We clean our muffler completely of carbon deposits, after which it is important to dry it thoroughly, so that the repair does not go in vain and, of course, put it back in place.

Dry cleaning of the muffler is very unsafe for health; carbon deposits contain a lot of carcinogen, which can be accidentally inhaled!

How to shorten a chain with your own hands

You can repair a chainsaw chain with your own hands, provided you have a special tool (most often included with the saw). Most often it is necessary to shorten it, especially if it has stretched. This is difficult to do, but possible. To repair it by shortening it, you need to prepare the following tools:

Some work can be done with a welding machine if you have doubts about your own abilities.

To shorten the chain on a chainsaw, you need to rivet it. Since it is made of durable steel, the process can be complex. It is connected on the inside of the rivet. The reduction is performed in the following sequence:

1. Secure the part in a vice.
2. Use a file or needle file to grind off the protruding part.
3. Knock out the rivets using a punch.
4. Do similar work in another place. This allows you to rivet it.
5. Remove links.
6. Connect with old rivets, while pressing them on the sides. The rivet can be welded to the side parts of the link, after which all excess can be filed off.

How to disassemble, repair and assemble a Shtil chainsaw

To repair the device, it must first be disassembled. It is necessary to remove the side cover, saw chain and bar. Then clean the tool, blow it out with a compressor and clean all the components with a brush. Then remove the handle. To do this, remove the plugs from the shock absorbers using a screwdriver. After this, remove the shock absorbers and handle.

Then remove the starter. Remove the housing cover and unscrew the starter screws. Remove the part. Then remove the flywheel, unscrew the nut that holds it, and unscrew the flywheel nut. You need to turn left. Remove the flywheel. Then dismantle the clutch, oil pump drive and carburetor.

After this, the motor is removed and disassembled. It is held on by 4 screws on the bottom of the saw. You need to unscrew them and remove the motor. Then the engine itself is disassembled. Unscrew the crankcase screws and remove it. Then the crankshaft, seals, bearings and piston rings are dismantled. Upon completion of disassembly, repairs and troubleshooting are carried out.

After repair, the instrument will need to be put back together. To do this, install the piston on the connecting rod. The arrow on it should point along the chain, and to the left of the piston there will be the side of the crankshaft in which the flywheel needs to be mounted. Place the piston in the cylinder. Install the bearings, seals and retaining ring into the cylinder. After this, degrease the place where the crankcase is fixed and install it in its place. When reassembling, follow the reverse dismantling sequence.

How to remove the clutch

Before unscrewing the clutch, you need to remove the drive sprocket. Remove the corkscrew washer and remove the sprocket and needle bearing. Unscrew the clutch. Remove the reflector plate and pump.

How to remove and replace a sprocket

Replacing the sprocket on a chainsaw is necessary in cases where:

• jams chain movement;
• The drive sprocket has worn out.

To replace, you need to remove the chainsaw sprocket. The sprocket teeth must not deviate from the required dimensions, otherwise the operation of the saw will be accompanied by vibration, which will lead to damage to the crankshaft and bearings. The service life of the sprocket is 2 times longer than the working life of the chain. Use 2-3 chains until their cutting surface wears out. After this, change the sprocket. It is located behind the clutch. Remove the clutch assembly cover.

Remove the bar, chain and clutch. But first you need to fix the crankshaft. Then the puller is placed in the coupling hole and turned clockwise. Remove the coupling. Behind it is an asterisk. Now it is being dismantled. If it is faulty, it is replaced.

Oil pump repair and replacement

Let's look at how to change the oil pump. If the element leaks, the gasket between its two parts should be updated. If this part of the oil pump is not damaged, then it must be wiped and put back in place. Now check the hose. There should be no cracks on it. If the hose is damaged, it is replaced. Then they clean the outlet channels with a compressor.

Replacing the piston

Let's look at how to diagnose and replace the piston group. It is necessary to check the condition of the cylinder and the degree of wear of the piston. After dismantling the engine, unscrew the pan and remove the crankshaft and piston from the cylinder. Unscrew the piston pin stoppers. If the piston is faulty, it must be replaced. The retaining rings are fixed with the cut down. Before installing the piston group into the cylinder, lubricate the piston with oil. Before installing the crankcase, degrease its surface and apply sealant.

How to set the ignition

You need to turn on the ignition on the chainsaw. Ignition adjustment is carried out as follows:

• unscrew the spark plug and evaluate its appearance;
• specify the distance between the magnets and the coil (up to 0.2 mm);
• check the spark.

What oil to use to lubricate the chain

This part requires constant lubrication, for which you can fill in special chainsaw oil, and it must be of high quality. It is recommended to choose oil for lubricating chainsaw chains from the manufacturer of the saw itself. Its consumption is small, so you should not save on your purchase. But there is no need to pour liquid on the chain itself. There are entire lubrication systems that help it flow to the tire uninterruptedly.

There are other criteria for choosing a saw lubricant:

• resistance to freezing, because sometimes you have to use the saw in winter, including lubricating it with oil, which means that at subzero temperatures it should not freeze;
• optimal viscosity of chain oil;
• the oil used should not leave residue on candles and other spare parts;
• no impurities.

The chain oil needs to be replaced if the part heats up and various breakdowns occur.

Chain lubrication diagram

The chainsaw chain lubrication system consists of the following elements:

• oil tank, which is located in the engine crankcase;
• filter in the tank;
• oil line, that is, a small diameter hose;
• oil pump.

Chainsaws are equipped with an automatic lubrication system. This means that oil flows to the chain only if it is in contact with the wood. The system operation scheme is as follows. The gear, which is located on the main shaft, drives the oil pump shaft. This creates pressure in the oil line, which forces the oil to move towards the tire.

The oil channel ends at the point where the device tire comes into contact with the chainsaw crankcase. The tension of the chainsaw chain for oil supply does not matter. It still lubricates itself.

No oil getting to the chain

You can tell that oil is not getting to the chain by the following signs:

• dryness of the part and lack of shine;
• its rapid stretching;
• heat;
• no reduction of oil from the tank;
• reduction in cutting efficiency.

To check whether or not there is oil supply, you need to point the end of the tire to the side and increase the speed as much as possible, while the end of the tire should be located at a distance of 10 cm from the tree.

If oil stains appear on the surface of the wood, then there is no problem with the oil supply. Feed may need to be adjusted.

The reasons for the lack of oil supply may be:

1. Missing thread on the oil pump shaft. In this case, it will need to be replaced.
2. Broken oil hose.
3. The presence of a defective thread on the pump drive gear.
4. Lack of main shaft corkscrew. The problem can be solved by installing a nail of a suitable diameter and the required length.
5. Blockage. You can clean the line by blowing it with compressed air or using a thin wire. If the blockage is in the filter or in the pump itself, then it is better to replace these parts.

Practical recommendations

Lubrication hole layout.

Before you start using chainsaws, you need to check the lubrication system of the chainsaw chain. For this purpose, it is necessary to hold the end of the tire by placing a sheet of paper under it. When the speed increases, an oily strip should form on the sheet.

Proper lubrication of the chain greatly increases the life of the chainsaw headset. If there is not enough oil, the device will operate dry. The cutting set will quickly break. The friction of the parts should be minimal, so all guides and hinge joints should be covered with an oily film.

When the chain moves along the guide bar, the lubrication system must provide a constant flow of oil. This function is performed by the oil pump. With its help, the required amount of oil is supplied to the guide bar and its groove.

The driving links of the chain spread oil over the total length of the groove. A guarantee of proper chain lubrication is considered to be:

• fine tuning of the oil pump;
• completely filled oil tank;
• correct choice of oil.

Before starting work, it is necessary to constantly monitor the operation of the lubrication system. The correct supply of lubricant is determined by the sides of the chain; they must be lubricated at all times.

Basic parameters of a chainsaw chain.

The need for lubricants is always different. It all depends on what needs to be cut. When the length of the cut reaches large values, the tree has high hardness and thick bark, it is necessary to have a large supply of oil.

If the cutting set smokes or the chain stops, we can talk about a lot of heating. The main reason is lack of lubrication. Other reasons may be:

• dullness of the chain;
• strong tension.

Train tips

It’s not enough to know how to solve problems with a broken or broken chain, because there is always the opportunity to prevent this. Proper care of your saw will help extend the life of the device and its parts. Therefore, it is recommended to follow the advice of experts:

1. Clean the air filter regularly and lubricate it with oil. The filter needs to be changed periodically.
2. Each time before starting work, you need to check that all nuts and bolts are securely tightened. Then there will be no failures in the device during operation.
3. Both the bearings and the sprocket need to be lubricated.
4. Clean burnt candles regularly.
5. Lubricate, sharpen and tension the chain in a timely manner.

A high-quality chainsaw, provided proper care and timely repairs, can last longer than the warranty period.

When the saw chain of a chainsaw moves in the groove of the bar due to friction, a large amount of heat is released. If oil does not flow to the chainsaw chain, it is necessary to stop work and take all measures to eliminate the malfunction of the lubrication system. The combination of heavy loads and overheating of the headset is accompanied by its accelerated wear and early failure.

• Without exception, all chainsaws and their electric analogues are equipped with systems of the same operating principle, through which the lubrication of the bar, saw chain and its drive parts is carried out.
• The standard composition of this device includes a reservoir from which chain oil is supplied to the inlet of a pump with a fixed or adjustable capacity.
• Next, the working fluid in a dosed amount enters the groove of the bar, in which it is evenly distributed by the shanks of the saw chain over the entire headset and the working surface of the drive sprocket crown.

Read also: How to use a reverse hammer

Performance tires with a length of 400 mm or more are equipped with a driven sprocket. Periodic lubrication of the bearing is carried out individually, after 6-8 hours of operation.

Semi-synthetic oil of the Stihl brand

Very often, owners of such chainsaws wonder what kind of oil can be used for the saw. Its operation may be affected by:

• cutting set;
• climate;
• wood species

To solve this problem, the Shtil company developed a universal semi-synthetic oil. It is suitable for all high-speed chainsaws. Under any conditions, chains can be lubricated with this oil. The tool will work flawlessly.

Since Shtil semi-synthetics are intended for chains, they are made from special high-quality materials and do not contain various toxic substances that can cause cancer. The oil fully meets the most stringent environmental requirements.

The Russian climate is quite harsh. There are areas in our country where frosts often exceed -20°C. The latest Stihl chainsaw chain oil has been specially developed for use in cold conditions. In such frost it demonstrates excellent fluidity.

Special additives included in the oil prevent the cutting set from becoming oily; they will extend the life of other lubricated parts. A saw with this oil starts easily even after long-term storage.

The use of such chain lube reduces wear on the saw chain. Due to the high endurance of the oil at high temperatures, the cutting set is ideally protected. This oil is not afraid of peak temperature loads. Smoke almost never appears.

A chainsaw is a hand tool designed for working with wooden material. It is equipped with a gasoline internal combustion engine. It is a complex structural device. During operation, the factory settings are violated, so periodically it is necessary to carry out such a procedure as adjusting the chainsaw.

Signs of a malfunctioning lubrication system

The correct choice of consumable lubricant and flawless operation of the system contribute to complete lubrication, effective cooling of sawing equipment and the complete exhaustion of its service life.

There are several external signs that the chain on a chainsaw is not lubricated. First of all, this:

• constant oil level in the tank;
• increased load on the engine;
• accelerated wear of the cutting edges of saw links;
• characteristic smell of overheated wood.

In the simplest version, the cause of oil starvation may be clogging of the oil channels with sawdust. This drawback is typical for budget headsets that do not have convenient access to problem areas.

Algorithm and description of the disassembly process

If you need to completely disassemble the Partner 350 chainsaw, the first thing to do when disassembling is to clean the saw using a compressor. Next, the chainsaw components are removed in the following order:

• chain brake cover and saw set;
• top cover;
• saw handle;
• starter.

After the first stage of disassembly is completed, we clean the chainsaw again using a compressor, since we already have access to the air ducts, which in most cases are heavily contaminated with wood dust.

At the next stage, it is convenient to remove the air filter housing and the Partner 350 carburetor.

After removing the carburetor, the inlet window of the cylinder must be plugged with a rag, this will prevent foreign objects from entering the engine crankcase.

The muffler can be removed either immediately after the carburetor is removed, or after the engine is removed. The outlet window is also covered with rags.

Next, remove the clutch and flywheel.

To do this, you will need to use a piston stopper by installing it in the spark plug hole.

The clutch on all Partner 350 chainsaws unscrews as the chain moves, this is done so that it does not unwind during operation. The flywheel nut has a standard thread and is unscrewed using a 13mm socket, counterclockwise.

After removing the clutch, the oil pump becomes accessible; it must also be removed.

The last step is to unscrew the engine screws and remove it from the housing.

Instructions for removing the flywheel from the crankshaft

To remove the flywheel, you will need to use a special puller, but most craftsmen use a drift made of soft metal, since with its help the removal process is significantly accelerated.

The bottom line is that the flywheel nut is unscrewed until it is level with the plane of the shaft, after which, using a hammer and a drift mounted on the nut, with one sharp blow, the flywheel is removed from the shaft.

The method is a little barbaric, but time-tested and recommended by many masters as the most practical and reliable.

Reasons for decreased system performance and efficiency

The required amount of oil is not supplied to the chainsaw chain for several reasons. The most common failures include:

• clogging of the filter located in the oil tank;
• mechanical failure of one of the pump worm drive elements;
• In winter, the performance of the blower is reduced due to filling the system with too thick oil.

In the latter case, the drive and all pump parts operate under increased loads, causing serious mechanical damage.

STIHL chainsaw stalls - does not develop speed

All systems of the STIHL chainsaw function harmoniously with each other, ensuring that the mechanism starts. But sometimes, when idling confidently, the saw does not pick up speed under load, and interruptions begin in the motor. This means that there may be serious reasons requiring repair: unbalance of carburetor screws, end of engine life, breakdown of a spark plug or ignition coil, wear of the piston group.

Oil is not supplied to the chainsaw chain Cleaning and repairing the lubrication system

But, most often, the engine does not develop speed, and may even stall, if the check valve on the tank lid fails, in which a vacuum is created, which is the cause of the problem. Repairing the valve is quite labor-intensive, so it is better and faster to replace the oil tank cap; its cost is quite affordable.

Feature of independent troubleshooting

A complete independent repair of chainsaw chain lubrication, all things being equal, requires knowledge of the interaction of all elements of the system, the availability of tools and plumbing skills.

Restoring the operating parameters of many chainsaws involves partial or complete dismantling of the component equipment. To perform complex repair work, it is better to use the capabilities and technical potential of service workshops.

Parts with broken threads and damaged spline joints, as well as non-separable structures that come with the lubrication system of popular Shtil 180 chainsaws and other similar models must be replaced.

If, when the tank is filled, oil does not flow into the headset structure, the reason should be sought in the pump itself. Dismantling and disassembling the mechanism will help identify faulty parts and eliminate the problem by replacing them.

Replacing the piston group

If it is necessary to replace the cylinder and piston of the Partner 350 chainsaw, it must be disassembled according to the algorithm described above. The piston is secured at the top of the crankshaft connecting rod using a piston pin. A separator with roller bearings is installed between the pin and the connecting rod.

To replace the piston and cylinder, it is necessary to remove the piston from the cylinder and remove it from the crankshaft; to do this, remove the piston pin stopper from one side of the piston using pliers and a small screwdriver.

Then it is squeezed out from the opposite side using a small screwdriver. If the pin comes out tightly, you can slowly knock it out using a hammer and a drift, suitable in size, but smaller than the diameter of the piston pin mounting hole.

To check the correct installation, you need to take the crankshaft with the piston installed on it so that the shaft on which the flywheel is installed is in your left hand, with the arrow facing away from you.

After the new piston is mounted on the crankshaft, a ring is installed on it, after which the piston is inserted into the cylinder, while the parts should be lubricated with engine oil, which will prevent the ring from breaking and make the process easier. Next, the crankcase is installed.

Service center technicians use an algorithm for replacing the piston group, which allows the work to be done without completely disassembling the Partner 350 chainsaw. How such a replacement occurs can be seen in the video.

Checking the system for oil output and performance

A dirty oil filter results in a significant reduction in pump performance. It is easy to check this parameter. To do this, you need to hold the headset of the saw running at working speed over a clean sheet of paper.

Based on the density and size of the oil strip, you can confidently judge the condition of the system and the complexity of the upcoming repair.

To the question why the repaired lubrication system works, but the chain does not receive oil in the required quantity, there is no definite answer. The reason for the failure may be errors made during assembly, failure of standard adjustments, or a discrepancy between the density and viscosity of the selected composition and the declared characteristics.

Oil starvation of the headset is possible when installing a longer productive bar on a household saw with a non-regulated pump, which is included with professional-class chainsaw equipment.

Assembly Partner 350

In order to correctly assemble Partner 350, it is necessary to install all elements in the reverse order of removal.

If this is your first time repairing a Partner 350 chainsaw, then when disassembling, place the parts in the order in which they were removed. This will prevent you from getting confused and forgetting to install any node.

An important feature of the Partner 350 chainsaw engine assembly is that the crankcase cover is installed without a gasket. Instead, a red sealant is used, which is applied in a thin layer to the crankcase installation site. Before applying the sealant, it is necessary to degrease the crankcase cover and its installation location for better adhesion of the sealant.

Setting the flywheel and coil clearance (ignition adjustment)

During the assembly process of the Partner 350 chainsaw, if not only the flywheel, but also the ignition coil was removed, a gap must be set between them. To do this, first install the flywheel, then place a piece of a one and a half liter plastic bottle on it, and then place the coil and fix it with two fastening screws, while the flywheel must be turned toward the coil with magnetic contacts.

Specifics of repairing Chinese chainsaws

A significant share of the imported chainsaw range is made up of Chinese-made chainsaw equipment. Many models have been copied with greater or less success from the best European designs.

The main advantage of Chinese products in the budget segment is the high level of interchangeability of spare parts, components and systems. To repair Chinese chainsaws, in some cases, you can use components from models from other manufacturers that are identical in power and purpose.

The chainsaw chain is not lubricated

During long-term operation of a chainsaw, some of its elements and components may become unusable.

Advantages of higher class oil pumps

The maintainability of dismountable pumps is sufficient to restore the operation of the unit at home.

The pump drive gears of budget chainsaws are mostly polymer. Advanced in terms of technical equipment, proprietary models with adjustable performance are equipped with drive mechanisms made of non-ferrous metals. The cost of such systems is compensated by economical, up to 50%, consumption of working fluid.

How to adjust the oil supply to the chain in a regular chainsaw. Proper lubrication of a chainsaw chain

One of the most vulnerable components is the oil pump. In this regard, many saw owners have a question about how to repair the oil supply on a chainsaw.

The job of the oil pump is to supply lubricant to the chain - this is necessary for its smooth movement along the guide bar. When the oil pump fails, the chain's lubrication is impaired, which reduces the chainsaw's efficiency. In some cases, this leads to a circuit break. To prevent negative aspects, it is necessary to timely repair the oil supply. How to do it?

Possible reasons for fuel failure

Oil may not flow the chain only if there are two breakdowns. These include:

• problems with air leaks;
• failure of the oil pump drive.

The main cause of failure is air leaks. This can happen due to depressurization of the oil hose while using the chainsaw. In this case, it is necessary to remove the hose from the hole. This must be done in the place where it is connected to the crankcase. Then the hose is seated on the sealant and installed in its usual position. If this doesn't help, there's likely been a loss of elasticity. For further operation of the chainsaw, it is advisable to replace the hose.

The second reason is a breakdown of the oil pump drive. In common parlance this part is called a worm. When the drive fails, oil will stop flowing to the chain . The oil pump drive is a round plastic ring with grooves inside. Constant use of a chainsaw leads to wear of the internal parts, resulting in the metal hook located inside the drive being chipped. After this breakdown, oil stops flowing to the chain.

Operating principle and design of the pump

Oil pumps can be made of metal and plastic. They are also divided into two types, which differ in their design:

The pump is driven by the movement of the drive sprocket. While the chain is moving, oil is supplied to a special channel located on the guide bar. At idle speed (when the drive sprocket does not rotate), the pump does not supply lubricant - this is done to save money.

The speed and volume of lubricant supplied to the chain directly depend on the number of sprocket revolutions. Some models of chainsaws have a manual adjustment system using a special screw located on the body of the device. On expensive models of saws, the oil supply is automatically regulated during operation.

Chainsaw design

A chainsaw consists of several large independent units.

1. The internal combustion engine is designed to generate mechanical energy, which is used to drive the chain saw.
2. The gearbox transmits torque from the engine to the cutting tool. It is a set of gears and intermediate shafts.
3. The clutch is an intermediate link between the gearbox and the chain. It is used for short-term breaking of the gearbox-chain chain. Ensures that the chain saw remains stationary at idle speed. Interrupts or weakens the transmission torque in emergency situations (for example, braking the saw to a complete stop), which allows the engine to work and not stall.
4. An automatic brake interrupts the operation of the chain if it breaks, rebounds from the wood being processed, or if abnormal operating conditions occur.
5. The bar is a guide for the chain saw.
6. Chain tension mechanism.
7. Chain lubrication device and other elements.

Main problems with oil supply

When operating a chainsaw, two types of problems with the supply of lubrication to the chain can be observed:

• Insufficient oil flow, which can be caused by various reasons. If measures are not taken in time, the quality of work will noticeably deteriorate, and the chain itself may become completely unusable.
• Excessive amount of oil. In this case, after prolonged use, puddles of grease may accumulate under the saw. This not only affects oil consumption, which will have to be constantly added, but also negatively affects the environment.

Both of these problems need to be addressed as soon as possible after they are discovered. This will extend the life of the saw and reduce lubricant consumption.

Read also: Illuminated switch, flashing light

Troubleshooting Circuit Problems

During operation of the chainsaw, it is necessary to constantly monitor the lubrication of the chain. After all, it is this part that works in the most difficult conditions. The chain is constantly overheated and dust and abrasive particles become clogged with it. All this negatively affects its service life. A special lubricant will correct the situation. It is supplied to the chain from the tank, thereby ensuring unhindered operation.

If lubrication does not occur during operation, there is a high risk of overheating. When there is no oil flow, the chain begins to stretch. At the same time, there is still a possibility of it jamming or spontaneously jumping off, as a result of which a person can receive serious injury.

The channels through which fuel is supplied can become clogged with small particles, so it is advisable to clean them periodically. It is also important to monitor the oil level in the tank. Debris in the channel is a common cause of chain brake failure. This may have a negative impact on your work.

Regular cleaning of the channels and general maintenance of the chainsaw will allow the tool to function for a long time.

But what to do if all the recommendations are followed, but the oil still leaks. It is necessary to ensure that the chainsaw is operating correctly. It is likely that it was assembled incorrectly. If the breakdown has not been identified, it is recommended to take it to a workshop. In some cases, it is necessary to replace the pump, but this should be done if the saw is new. Old tools leak due to worn out reservoir.

Only a specialist can assess the current condition of the chainsaw. If you lack knowledge or lack confidence in your own abilities, it is advisable to entrust instrument repair to a professional.

Troubleshooting

If oil is supplied to the chain in excessive quantities, not only while the saw is running, but also at idle, manual adjustment should be made (if the pump design allows this possibility). This is done using a screw, which is located on the body near the guide bar, usually on the bottom or side. Tightening the screw reduces the oil supply, loosening it does the opposite. If the adjustment does not help, it is necessary to check the serviceability of the pump, and also inspect the tire - perhaps a gap has formed at the point where it connects to the body, through which oil flows past the chain.

Lack of oil can be caused by several reasons, each of which has its own solution:

• Oil pump malfunction. As a rule, it consists of an unsuitable gasket. In order to replace it, it is necessary to carefully disassemble the pump so as not to damage its moving parts. Next, a new gasket is installed, after which the pump is assembled and installed in place.
• Broken oil supply hose. If the pump gasket is in good condition, or if replacing it did not lead to results, you should check the tightness of the hose. If it is faulty, it needs to be replaced. Otherwise, it would be a good idea to clean it and seal it with sealant.

If the reason does not lie in a breakdown of the pump, it is necessary to inspect all conductive holes and channels for blockages, and, if necessary, clean them of foreign objects. This can be done with a jet of compressed air.

Don't want to tinker with a chainsaw but need to adjust the oil flow? Contact our specialists for help, who will diagnose and repair the chainsaw, and, if necessary, carry out repair work and adjust the lubrication level. Your saw will be like new!

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About the carburetor design

The carburetor serves to mix the flammable mixture with air while maintaining predetermined proportions. If clear doses are not followed, the proper operation of the engine is at risk. When a huge amount of air enters during mixing of the components, but there is not enough fuel, then such a mixture is considered “lean”.

Oversaturation should not be allowed, because with a larger amount of fuel compared to air, malfunctions or engine wear are also likely. adjustment is needed not only before initial use, but also when any differences in its operation are detected. Before working with a chainsaw, do not forget to run it in.

Carburetor components

The carburetor design contains a standard set of parts, but may vary slightly depending on the manufacturer. Components:

1. The basis . This is a special tube that is visually similar to an aerodynamic design. Air passes through it. In the transverse direction, a damper is located in the middle of the pipe. Its position can be changed. The more it is extended into the passage, the less air enters the engine.
2. Diffuser . This is the constricted part of the tube. With its help, the air supply speed increases precisely in the segment from which the fuel comes out.
3. Channels for fuel supply. The fuel mixture is contained in the float chamber, then passes into the nozzle, from which it flows into the atomizer.
4. Float chamber . It is a separate structural element, reminiscent of the shape of a tank. Designed to constantly maintain the optimal level of fuel fluid before entering the channel from which air enters.

Don't know which chainsaw to choose? Read our article.

Are you looking for cheaper models, but reliable and time-tested? Pay attention to Russian-made chainsaws.

Or explore foreign chainsaw manufacturers such as Shtil.

Adjusting the Oil Supply to the Chainsaw Chain Partner

Most modern oil pumps for chainsaws are designed the same way: in the body (photo 1, item 1) there is a cylinder (photo 1, item 2), into which a plunger is inserted (photo 1, item 3), which performs rotational and translational movements in it.

The cylinder in the lower part has two holes (in photo 1, position 4, only one of them is visible): oil is sucked in through one, and oil is pushed out into the second.

The plunger (photo 2) is a steel rod, on one side it has a milling groove - a flat, and on the other a plastic or steel gear. As the plunger rotates, the flat alternately opens and closes the inlet and outlet ports of the cylinder. When moving upward, the flat first opens the inlet (while closing the outlet) and creates a slight decrease in pressure. Due to this, a portion of oil is sucked into the cylinder. Then, turning, the plunger moves downward, opening the outlet hole with its flat surface (while closing the inlet hole) and pushing the oil out of the cylinder. So it is fed to the tire in small portions. Due to the high cycle frequency, a constant and continuous flow of lubricant is created.

Two types of oil pumps are used (photo 3): with adjustable oil flow and with unregulated flow. In the first case, the plunger gears have an oblique tooth, and upward translational movements are provided by an additionally installed spring. The oil flow is controlled by changing the stroke length of the plunger in the cylinder. Example - oil pump for Chinese saws with an engine capacity of 45-52 cc

In the case of a non-adjustable oil pump, the plunger has an oblique closed groove into which the fixed stop of the housing rests. Rotation causes the groove to slide along the stop, and since it is oblique, this movement causes the plunger to move back and forth. With this scheme, it is impossible to limit the stroke of the plunger and oil is supplied in constant quantities. Example - oil pump of Husqvarna chainsaw 137, 142

The torque from the engine to the plunger is transmitted through a special drive , which also has a gear - the mating part of the gear on the plunger. In fact, this is a pair of worms. The oil pump drive is driven either by the chain drive sprocket (photo 4, item 1), or by the crankshaft itself (photo 4, item 2).

In the first case, the plunger is mechanically connected to the drive sprocket and rotates only with it. Photo 4, item 1 shows the drive of the Stihl MS-180 chainsaw. The steel tendril clings to a special groove on the drive sprocket cup. When the sprocket rotates, the drive rotates along with it. At idle speed in this case there is no oil supply.

In the second case, the drive is rigidly fixed to the shaft and constantly rotates with it. Photo 4, item 2 shows the oil pump drive of the Husqvarna chainsaw 137, 142. It is pressed onto the crankshaft shank and rotates constantly with it. Therefore, oil is constantly supplied, even if the saw is in idle mode.

Typically, one of the gears (either on the plunger or on the drive) is made of plastic in order to protect a part with a more complex design or complex installation. The plastic part will be the first to break and wear out.

On some saws, the oil pump with the drive can be additionally closed with a special cover (photo 5, oil pump cover of a Chinese chainsaw 45-52 cc), which protects the worm joint and the pump itself from dirt and wood dust. On some saws, such as Husqvarna 137, 142, the oil pump housing itself covers the connection between the drive and the plunger, thereby serving as a protective cover.

The bar and chain require a certain amount of lubrication to function properly.

Final check at idle

Before this procedure, it is necessary to carry out a full adjustment of the carburetor components when operating at maximum speed. Next, you should check the functioning of the device in idle cold mode. When the correct adjustment parameters are achieved, you will notice that the carburetor design closely matches the following criteria:

1. When the idle cold mode is activated, the chain does not move.

Chainsaw accelerator

1. When the accelerator is pressed even slightly, the engine accelerates at an accelerated pace. With gradual deepening of pressure, you can notice that the engine speed increases proportionately, reaching the maximum permissible values.
2. When the engine is running, you can compare its sound to a four-stroke device.

If violations are noticed in the given parameters or the device has not been fully adjusted Sometimes actions are performed incorrectly. In this case, the device may fail due to the loss of the correct node settings. In this case, you will have to contact a specialist.

adjusting the oil supply to the chainsaw chain

In order for the existing design of the lubrication system on a chainsaw to produce it, the oil must have a suitable viscosity. Judging by the mechanics, the oil pump does not care what kind of oil you use: automobile, transmission or special. The main thing is that the viscosity is within the established acceptable range. However, this does not mean that you can pour any oil. The purpose of chain oil is not to save you money on buying it, but to lubricate the parts of the bar and chain. Different oils cope with this task differently. But more on this in another article “Chain oil. What to pour?

What does an oil pump consist of and how does it work?

The pump housing is located on the outside of the saw housing, under the centrifugal clutch drum of the gasoline saw. The drive mechanism of the oil pump is rigidly connected to the saw chain clutch. This means that the higher the engine speed, the more lubricant is supplied to the chain and chainsaw bar.

Unlike the plungers used on car pumps, the operating mechanism in chainsaws can be disassembled and reassembled without much effort. The pump body has two calibrated holes located opposite.

One hole is connected to the oil tank and serves to draw lubricant from the tank. The other communicates with the main line leading to the saw set. At the end of the plunger there is a longitudinal segmental groove to capture the working fluid.

Oil is supplied by rotating the plunger around its axis. The segment cut first opens the hole connecting the pump to the oil tank. At the same time, a vacuum is created in the pump chamber and a portion of oil is drawn into it.

Further rotation of the plunger closes this channel and creates excess pressure in the system. Passing the segment cutout through the discharge hole opens it, and the working fluid is supplied to the line to lubricate the chain.

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Chain lubrication system

One of the important chainsaw systems, without which this is impossible, is the forced lubrication chainsaw system. It is no secret that while the saw is running, the chains rub the chainsaw, which causes it to heat up and cause premature wear. To reduce friction, the chain mechanism must be constantly lubricated.

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Chain lubrication system

To supply chain saw oil to the tool, a special pump is used, which, depending on the engine speed, is dosed and provides lubrication on the saw bar.

The system uses oil to lubricate the chain, which has increased adhesive properties, it is necessary to distribute the oil evenly around the entire perimeter of the tire and hold it even at high speeds. Let's take a closer look at the oil supply system implemented in modern chainsaws.

Lubrication system design

Depending on the brand of chainsaw, the parts of the lubrication system may differ slightly in design, but their total number and connection diagram remain unchanged.

The main components of the lubrication system are:

The oil reservoir is usually located in the engine crankcase.

Operating principle

The main unit of the system is the pump. The principle of its operation is as follows. When the engine speed increases, a gear mounted on the main shaft drives the pump shaft through the worm gear. In turn, the rotation of the shaft creates a certain pressure in the oil line, which forces the oil to move along it towards the tire.

TOP 5 popular brands

Saving on lubricants leads to accelerated wear of chainsaw parts, and even to its breakdown. We have already noted that under no circumstances should you consume waste liquids - this is a sure step towards destroying your instrument. It is not recommended to fill in diesel oils, spindle and other substitutes. They are not suitable for such purposes and have a bad effect on the performance and durability of the chainsaw.

Husqvarna Chain Oil

Oleo-Mac Polar Lube

The constant use of substitutes accelerates chain and bar wear by 30-40%. When recycling is used, this figure rises to 60-70%. Decide for yourself whether it makes sense to save on oil to lubricate the chainsaw chain.

Recommended chain oils:

• Husqvarna Chain Oil. An excellent solution for working in moderate climate conditions from a well-known manufacturer of garden equipment;
• Oleo-Mac Polar Lube. It has proven itself when working in temperature conditions from -150 to +300 Celsius. Does not pollute the environment;

MANNOL Kettenoel

Liqui Moly Suge-Ketten

STIHL ForestPlus

• MANNOL Kettenoel. It has good adhesive properties, which ensures high-quality chain lubrication. Used at temperatures from - 150C and above;
• Liqui Moly Suge-Ketten. High-quality, multi-purpose mineral oil that reliably protects your chainsaw. Can be used at both high and low temperatures;
• STIHL ForestPlus. An excellent choice for professionals. Will protect your chain well when working in difficult and extreme conditions;