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

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.

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.

Features of the lubrication system and choice of oil

Fuel tanks are selected exactly according to volume. At maximum output, it is permissible to select components with a small amount of oil.

Chainsaw fuel system: 1 – fuel filter, 2 – carburetor, 3 – manual pre-priming pump.

If the carburetor is adjusted correctly, fuel will be consumed in the permissible amount. Otherwise, it will end too quickly.

A slow decrease in fuel while the saw is in use is normal. If it is missing, the chain is not lubricated correctly, so working with the chainsaw must be smooth. It is necessary not only to be able to fix breakdowns, but also to identify them yourself.

You can change the fuel supply manually. The correct operation of the lubrication system is determined by holding the tire up. If oil splashes appear, then everything is set up correctly.

It is advisable to make cuts with a significant amount of lubricant. If you have to work with soft wood, a small amount of fuel is supplied.

The chain should always be well lubricated. This will avoid smoke and further failure of the entire chainsaw. If oil leaks or does not flow at all, it is necessary to identify the cause of the breakdown. It is not recommended to operate the tool until repaired.

When choosing fuel, you need to do it correctly. The desire to save money leads to the fact that the chain quickly fails. To avoid unpleasant consequences, it is not advisable to choose oil produced in China. Preference should be given to original companies. In their price category they are much higher, but their quality is also better.

Signs of a malfunction of the lubrication system, checking its performance

• chain is dry and has a pale tint without shine.
• The chain stretches relatively quickly.
• The tire is very hot and may even partially melt the paint.
• The oil from the tank is practically not reduced.
• Reduced cutting efficiency on a sharp chain

All these signs indicate that the lubrication process is not proceeding properly. In order to check the oil supply to the lubrication system, you need to remove the side tire of the chainsaw and start it. Next, you need to slightly increase the speed while observing the end of the oil line. If oil comes in, most likely the amount is not enough for normal lubrication and you need to clean or replace the filter and, if possible, adjust the flow. If it does not, the problem is more serious and requires further diagnosis.

There is a way to check the oil supply without removing the tires. To do this, you need to point the end of the bar towards, for example, a freshly cut piece of wood from the side of the cut and increase the speed as much as possible, while trying to keep the end of the bar at a distance of no more than 10 cm from the block. If oil spots begin to appear on its surface, it means the oil is being supplied.

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.

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.

How does a carburetor work on a Husqvarna 137 chainsaw?

Chainsaws of these models are most often equipped with a Walbro carburetor from the factory. Before adjusting the Walbro carburetor on a Husqvarna chainsaw, you need to have a minimal understanding of its structure and know the principle of operation.

What is responsible for supplying the mixture of fuel and oil

For precise supply of fuel and oil, the operation of a fuel pump is used, which is driven mechanically from the crankshaft. The carburetor itself is equipped with a diaphragm and a special needle valve, which are responsible for regulating the pressure in the system. Thanks to them, the correct operation of the dosing chambers and the pump is organized, which improves the operation of the chainsaw.

Preparing the fuel mixture

When operating a chainsaw, a fuel mixture of gasoline and oil should be used in a ratio of 15:1 by volume, i.e., 1 liter of oil should be added to 15 liters of gasoline and the mixture should be mixed thoroughly. The amount of gasoline and oil in the fuel mixture is given in this table:

What is responsible for the air supply?

Two dampers installed on the diffuser chamber are responsible for the air supply. The first can regulate the amount of air at the moment you press the accelerator and is called the throttle, and the second ensures that the air supply is limited at the moment when the chainsaw is cold started. To make starting easier, the throttle is closed, which means the mixture becomes rich, as it is saturated with a large amount of fuel. It is easier to work in this mode, but since it increases fuel consumption, this mode is not used throughout the entire operation. The saw is working hard.

To spray fuel into the cylinders, an injector with a check valve is used.

The principle of operation is simple: it limits the return of the mixture back into the chamber. All the main malfunctions of chainsaws most often occur when this mechanism does not work properly.

1. The most common mistake is storing the tool for too long. The fact is that with prolonged inactivity, the valve sticks and either fills the cylinder with fuel, or simply does not open.
2. The second problem is an increase in the amount of air in the mixture, caused by its suction from the outside due to improper operation of the valve. It is no longer possible to adjust here, since in this case only repairing the valve or replacing it helps, since the saw will not respond to the adjusting screws.

Unlike a car, setting up a chainsaw carburetor provides three adjusting screws that are responsible for the quality of the mixture, quantity and nominal crankshaft speed of the Husqvarna engine:

• screw L – designed to adjust the number of revolutions when operating in medium modes and regulates low speeds;
• Screw H – adjusts the number of high speeds and thrust of the installation;
• T – is designed to adjust the total amount of fuel and adjusts the operation of the throttle assembly.

It is not recommended to touch the first two screws without special skills. The problem is that if you configure them incorrectly, the carburetor will not be able to start the engine, or even start it in the wrong operating modes. Such adjustment of the screw can lead to its rapid wear and failure. This principle is embedded in many devices.

No table provides the settings parameters. Therefore, you should not look for this data in specialized literature, but just strictly follow the instructions. The table in the passport has only informational value regarding the characteristics of the engine.

This is interesting: Chainsaws Husqvarna (Husqvarna) 350: characteristics, adjustment

STIHL chainsaw: problems and causes

The STIHL chainsaw is a device from one of the famous German developers, the STIHL company, which guarantees quality, ergonomics, maneuverability and operator convenience in working with the tool, as well as excellent performance, despite its compact size. The range of technical capabilities of the STIHL chainsaw allows you to solve problems at both professional and household levels. Saws of this brand have more than enough advantages, but, like all complex equipment, there are some disadvantages.

If there is a need to shorten

Often, when working in the forest or on a remote construction site, you will not be able to find a replacement for a stretched chain.

Having taken into account all the advice, and having made sure that it is necessary to shorten the chain, it is important to know the sequence of actions and possible replacement methods

There are not many of them and they depend on how many links need to be removed and under what conditions the repair will be carried out.

This is important to know: a chainsaw chain consists of cutters and connecting links, which are connected with rivets in the factory. The shortened chain should be connected in the same way, but using homemade rivets

Each link (the cutter and the links connecting them) has two such rivets. If nearby “native” connecting links are damaged, you can use elements from any other similar circuit of any equipment, even automotive equipment. You just need to file the profile, especially at the bottom, where it has a small groove.

Chainsaw circuit diagram

The easiest way is to take a long chain, in which several segments can be removed without problems. This way, at least, it becomes possible to use family links. They can be removed using a hacksaw, but it is better to use sandpaper.

Initially, you need to grind off unnecessary rivets, and then cut off the excess area. To do this, you need to pry it with a knife and knock out the rivets from the unnecessary links using a homemade knockout.

When connecting a new chain, you have to make homemade riveting of the links. The rivets themselves can be bought at the store, but if you don’t have them, use steel wire, or better yet, a short bolt with a flat head. Riveting is done on a rigid base (metal workbench or vice). Alternately threading through the elements of future rivets, use a hammer to flare them from the reverse side.

You may also be interested in the article on sharpening a chainsaw chain with your own hands. You can read about the types and characteristics of modern chainsaws here.

And in this article you can find out how to repair a Shtil 180 chainsaw.

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.

I bought a fake, what next?

What to do if you were in a hurry and already bought a Chinese chainsaw called “Husqvarna” 5200? The main thing is not to get upset and prepare for the fact that you will have to do all the repair and adjustment work yourself. Most likely, you will not find the operating instructions included with the saw, so to properly start the tool, refer to the video instructions:

As for repairs and adjustments of the carburetor, lubrication, etc., the design of the internal combustion engine and other systems is identical for all chainsaws, with the exception of some nuances, so you can be guided by similar devices. The characteristics are also not fully presented; the Chinese manufacturer indicated only the most basic ones:

As a consolation, we can say that this tool also works; with proper maintenance, the chainsaw can work for quite a long time before the first repair. Spare parts are inexpensive - this is also a big plus.

Run-in

The running-in procedure for moving components lasts about 10 hours. The chainsaw is not loaded during this period; the power during operation should not exceed 50% of the rated power of the power plant.

Safety requirements

• Fill the saw with fresh mixture.
• Start the chainsaw at a distance of at least 3 m from the refueling point.
• Do not smoke while operating or servicing the tool.
• Use personal protective equipment.
• To avoid kickback, do not cut with the end of the bar, only cut with the entire blade. lowering the chainsaw from top to bottom.
• When working, hold the chainsaw with both hands.

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.

The principle of operation of a chainsaw

The main internal combustion engine is started using a starter. The engine speed is controlled through the carburetor, which in turn is controlled by the accelerator. When a certain number of revolutions is reached, the automatic clutch begins to transmit torque to the chain.

To obtain more power and speed, more fuel is supplied through the carburetor through the accelerator. This is important during the sawing process, since the power of the cutting tool will be directed to processing the wood.

Reasons for stopping the oil supply in a chainsaw

A brief overview of why oil in a chainsaw stopped supplying the tire from the tank. Support our channel in any way you can.

Chainsaw fuel system: 1 – fuel filter, 2 – carburetor, 3 – manual pre-priming pump.

If the carburetor is adjusted correctly, fuel will be consumed in the permissible amount. Otherwise, it will end too quickly.

A slow decrease in fuel while the saw is in use is normal. If it is missing, the chain is not lubricated correctly, so working with the chainsaw must be smooth. It is necessary not only to be able to fix breakdowns, but also to identify them yourself.

You can change the fuel supply manually. The correct operation of the lubrication system is determined by holding the tire up. If oil splashes appear, then everything is set up correctly.

Repair features

Some problems with the Husqvarna 137 chainsaw can be fixed on your own. The service center is contacted only in cases where parts receive mechanical damage or wear out to a critical condition.

To carry out minor repairs or replace worn parts, use the repair tools that come with the product.

So, if the saw does not start, the reason must be sought in the fuel supply system. When the tool stalls during operation, the repair of the Husqvarna 137 chainsaw may be limited to cleaning the muffler from carbon deposits.

How to adjust the carburetor

Primary adjustment of the carburetor is carried out at the manufacturer to standard fuel parameters based on operation in summer conditions. Changes in settings occur due to vibration during sawing wood or due to the use of a low-quality fuel mixture. performed in cases where the engine is unstable, does not start or stalls under load.

To repair a carburetor with your own hands, you need to have the following tools:

• screwdriver;
• wrench;
• thin wire.

Restoring the functionality of the product is carried out in the following ways:

1. Cleaning clogged channels with wire.
2. Adjusting the tension of the gas damper drive cable.
3. Removing the faulty membrane and installing a new part.
4. Sealing connections.
5. Replacing the gasket.

After eliminating the malfunction, the device is fine-tuned by rotating the bolts L (crankshaft speed), T (idle speed) and H (fuel supply volume).

How to disassemble and reassemble a chainsaw

Disassembly of the product is carried out when:

• seasonal service;
• repair;
• planned replacement of worn parts and mechanisms.

The product is disassembled in the following sequence:

1. Remove the handles.
2. Loosen the housing bolts and remove the covers.
3. Remove the tire.
4. Disconnect the starter.
5. Unscrew the flywheel.
6. Remove the clutch and oil pump drive.
7. Disconnect the carburetor muffler and ignition coil.
8. Disassemble the engine.

The unit is assembled in the reverse order.

Poor oil flow to the chainsaw chain

Each chainsaw, regardless of its model, brand, or class, has approximately the same structure. It consists of several important components, including the lubrication system. Without the latter, the operation of the power unit is impossible. Due to the functioning of the forced lubrication system, the tool chain reduces the risk of severe wear, which is guaranteed in conditions of constant friction of the carved element against the guide bar and inevitable heating. When the chain mechanism is lubricated, friction is softened; the chainsaw operator needs to repair this element or completely replace it much less often.

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.

Breakdowns and how to fix them

Considering the types of malfunctions of the lubrication system, we can distinguish two categories:

• general breakdowns found in all types of power units;
• individual, which depend on the type of pump, on the features of the worm-type transmission, on the design and other features of a particular chainsaw.

Important! If the lubrication system does not work, it is not recommended to use the saw. This way you will ruin not only the chain , but also the guide bar, as well as the main sprocket, which leads to the need for large investments in repairing the device.

“Symptoms” of a faulty lubrication system:

• the chain mechanism is dry, pale, no shine;
• the chain quickly stretched after installation;
• the guide bar heats up and its paint melts;
• the oil remains in the same volume in the reservoir, despite intensive use of the tool;
• chain cutting efficiency is significantly reduced.

All this indicates a malfunction of the lubrication system or its functioning intermittently.

• Remove the side tire.
• We start the instrument.
• Gradually increase the speed, observing the end of the oil line.

If consumables arrive, then the reason for the problematic operation of the lubrication unit most likely lies in a clogged filter, which can be cleaned or replaced with a new one. If possible, after this manipulation the supply of consumables is regulated.

If consumables do not arrive, then additional diagnostics need to be carried out, since, most likely, the problem is more serious.

The chainsaw DOES NOT USE OIL ON THE CHAIN!!!

Please note that it is not always necessary to remove the tire to check the operation of the lubrication system. Alternatively, the end of the bar is directed to the side (we use a block) from the direction of the cut, maximizing the speed, and holding the bar (its end) 10 centimeters from the block. When applying oil, you will see corresponding spots.

Preventative maintenance of chainsaws

Sharpening the saw is done independently using tools and a file or on a sharpening machine. It is produced when cutting edges are worn out or minor chips on the teeth.

Filters are changed periodically in accordance with the manufacturer's recommendations. Air, oil and fuel cells are subject to renewal.

Spark plugs are replaced after a certain time, guided by operating requirements.

Refueling. Different manufacturers and engine types determine the composition of the fuel mixture - a 2-stroke or 4-stroke gasoline engine is filled with gasoline with or without the addition of oil.

More complex work - repair of the piston group, gearbox, clutch, etc. - is carried out as events occur. Such work is usually carried out in specialized repair shops.

A properly configured chainsaw is the key to safe and highly productive work. Remember this!

Video on how to properly tension a chainsaw chain.

Video about adjusting the oil supply for chain lubrication.

Do-it-yourself chainsaw carburetor adjustment

For an independent carburetor option, you need to familiarize yourself with its structure and understand the procedure for the work that is carried out to adjust the parts responsible for the proper functioning of the components of the device and parts close to it.

It is necessary to carefully handle items for the system option, and also to determine whether the set characteristics correspond to very acceptable values.

What to do if there is no oil supply?

As we have already found out, additional diagnostics need to be carried out. To do this, we disassemble the lubrication system. Please note that in some saw models this is possible by completely disassembling the tool. So, just in case, arm yourself with the appropriate repair tools. If you do not have experience in disassembling a saw, entrust this task to a professional.

READ Connecting a vacuum cleaner to a circular saw

When the lubrication system is disassembled, you will be able to detect one of the following breakdowns:

• the oil hose is torn (sometimes visible to the naked eye upon preliminary examination of this part of the assembly), which needs to be replaced;
• there is no thread on the shaft where the oil pump is located (needs to be attached, replaced);
• damaged thread of the pump main gear (a new one is installed);
• there is no main shaft corkscrew (this problem is often observed with Homelite brand chainsaws), which can be solved by installing a nail in place of the original corkscrew (ideal in size, if there is a need to trim it);
• a clogged line, this can be solved by blowing out (mechanically or using compressed air, sometimes a wire helps);
• The filter element is clogged (clean or replace).

Please note that for some STIHL power units (for example, the MS 180 model) the pump cannot be disassembled, but it will periodically become clogged. In this case, it is washed with gasoline or, if necessary, completely replaced.

Chinese saws often “suffer” from cut grooves in the main gear, through which power is transmitted.

Another common problem, again typical for STIHL brand products, is depressurization of the line. You need to look for the problem at the point where the oil line that comes from the reservoir enters the equipment body. Such a breakdown is indicated by oil leaks at the bottom of the power unit. In order to correct the situation, the handle is dismantled, the hose is removed, cleaned and degreased, then the seat is treated with sealant and the hose is reinstalled. After this, the lubrication system should start working normally.

Why doesn't oil to the chainsaw chain?

If during operation the chainsaw chain oil In fact, there may be many reasons influencing this common rumor process. You should disassemble the chainsaw and identify the main problem. The probable prerequisites for this process will be described below.

There are several reasons for the lack of oil supply to the chain while the chainsaw is running, and you also need to disassemble the chainsaw to identify them.

Lubrication system design

The chainsaw chain lubrication system, depending on the tool manufacturer, may differ slightly in design features and parts used to create this unit. In this case, the features do not affect the connection diagram of the system, as well as the total number of parts used.

• an oil reservoir located in the engine crankcase;
• tank filter (element located directly in the tank);
• an oil line that looks like a small-diameter hose made of high-quality rubber;
• the pump itself can be considered the heart of this unit;
• a worm gear (worm-type gears) that supplies force from the engine to the heart of the assembly.

In some works by power unit repair specialists, the guide bar is described not just as a saw set, but as one of the components of the lubrication system. Why is that? This can be explained by the presence of special holes in this tire through which oil . By the way, the chain itself can be considered a participant in the transportation of lubricating consumables, since this mechanism also has parts related to oil distribution.

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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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.

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.

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.

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.

Main problems with oil supply

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

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

• 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.

READ How to properly sharpen a circular saw

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.

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.

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:

• 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.
• 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.
• 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.

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

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.

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:

• Clean the air filter regularly and lubricate it with oil. The filter needs to be changed periodically.
• 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.
• Both the bearings and the sprocket need to be lubricated.
• Clean burnt candles regularly.
• Lubricate, sharpen and tension the chain in a timely manner.

The oil on the chainsaw does not flow to the chain

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 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.

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.

Main characteristics

The Shtil chainsaw chain lubrication system consists of:

• guide bar;
• saw chain;
• oil pump.

The oil supply by the pump has a special adjustment. The chainsaw chain is lubricated constantly during operation of the device. Therefore, chainsaw chains have a long service life.

During operation, the chain requires a constant supply of lubricant. Its continuous supply must be ensured. This is required by the design of the device. While the chainsaw is running, the oil leaves the bar groove and is instantly absorbed by the sawdust.

For this reason, the chain is lubricated automatically. Some chainsaw chains are equipped with a system that regulates the exact amount of lubricant supplied. The cheapest devices are equipped with a hand pump, which is powered by a drive located on the handle.

Scheme for checking the operation of the chain lubrication system.

A special oil has been specially developed for good chain lubrication. After use, it quickly decomposes, so there is no disruption to the ecological system. You can also use the following brand oils:

The gear lubricant is absolutely not suitable for the job. In winter, it hardens, as a result the oil system becomes clogged, and you have to clean it completely.

In winter, chain lubrication requires special attention. in severe frost it thickens and resembles Vaseline. Therefore, to operate in winter, it is necessary to lubricate chainsaws with special winter oil, which has a thinner consistency.

It is not always possible to purchase such a lubricant. To solve the problem, diesel fuel is mixed with oil, the viscosity is reduced. However, if the previously filled oil remains in the crankcase, then adding diluted oil will not have a positive effect; the system channels will remain clogged. There is only one way out - heating the chainsaw in a warm room.

If the chain oil does not solidify too much, you can try to melt it by running the saw at low idle speed.

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.

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. 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 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.

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 the popular STIHL 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.

Sources:

https://crast.ru/instrumenty/ploho-postupaet-maslo-na-cep-benzopily https://morflot.su/pochemu-ne-postupaet-maslo-na-cep-benzopily/

Chain lubrication problems

The main problems with chain lubrication that a chainsaw owner may encounter while operating the tool:

• Oil does not flow into the chains of the electric saw or chainsaw.

Reason: there is not enough oil for lubrication, the filter becomes clogged, the threads on the pump gear come off.

This malfunction can be eliminated by replacing the filter, adding oil to the crankcase, and replacing the threads.

• Depressurization of the oil pipeline (usually for Stihl chainsaws).

READ Stihl Chainsaw Doesn't Start Prerequisites Spark Yes

Reason: You can recognize this type of damage if there are oil stains on the bottom of the chainsaw. To solve the problem, sealant is applied to the seat of the hose after fixing it to avoid oil leakage during future operation.

. Oil does not flow into saw chain

How to reduce the oil supply to a chainsaw chain

The chainsaw chain is not lubricated

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

Choosing the right oil

After you purchased the device, you immediately had a question: what kind of oil should you put in your Stihl chainsaw? If you properly care for equipment intended for work in the construction and gardening industry, you can significantly increase the level of activity of the direct operation of the device itself without encountering breakdowns of various types.

The right lubricant

It is worth noting that the most important factors in the immediate performance of the device is the use of the correct lubricant and fuel . Although the main problems for owners of this equipment arise precisely with the choice of oil for their “favorites”. At this point you can find out how to select a lubricant specifically for Shtil chainsaws.

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.

We will fix the defect for 1,500 rubles excluding parts

Below you can see the latest repairs of our clients whose electric saw chain does not receive oil. The price presented is final, taking into account replaced spare parts and diagnostics performed. All repairs are guaranteed. There are daily discounts on the service.

Click on the repair you need to find out more.

Diagnostic and repair algorithm

When starting to repair an electric chain saw, it is necessary to carry out sequential diagnostics of all components of the unit to determine the cause of the breakdown. Repair of the unit is carried out based on the signs of malfunctions that were listed above. Below is a diagram of the electric saw, which shows in detail the internal structure of the unit.

The power saw does not turn on

If, when you press the start button, the unit does not turn on, then diagnostics are carried out in the following order.

1. Check the voltage at the outlet. It may not exist due to a general shutdown or a malfunction of the outlet. Try turning on the unit in a different location.
2. If there is voltage in the outlet, then you should check the network cable. Remove the engine housing cover and test each wire with a tester, touching one probe to the contact inside the unit, and the other to one of the rods of the electrical plug.
3. If the wire is fine, then continue checking further. Check the wires going to the start button with a tester to see if there is a break.
4. Next, you should ring the contacts of the button at the input and at its output while the key is pressed.
5. After this, check the conductors going to the unit’s motor. If there is a soft start module in their way, then check the circuit at the input and output of it.

If the previous actions did not reveal the cause of the engine failure, then the brushes should be removed and checked. There are times when the engine does not start due to complete wear of one or both brushes, as well as due to broken conductors in them. If the brushes are working properly, then most likely the motor has failed, namely the stator or rotor windings have burned out. In this case, in order to ring the coils, you need to have some skills and knowledge in this area. It is better to take the electric saw motor to a specialist who will find the fault and rewind the coils.

Brushes and commutator burn

The appearance of strong sparking under the brushes can be caused by poor contact between the armature lamellas and the electrodes due to wear of the latter. To check this, you need to remove the parts from the brush holders.

It is believed that normal wear of brushes should be no more than 2/3 of their original length.

If the brushes are worn out, they need to be replaced. Also, brushes can spark due to clogging of the gap between the armature lamellas with graphite dust. Since graphite is a conductor, it causes short circuits and sparks.

To remove dirt, you need to thoroughly clean the slats using alcohol, cotton wool and a toothbrush. It is also recommended to polish them with the finest sandpaper (zero).

No lubrication on chain and bar

Lack of lubrication on the tire or its complete absence can be caused by a clogged hole or tube through which oil is supplied to the tire. Often the chain is not lubricated if the supply of lubricant from the reservoir is interrupted. This can happen if the filter at the end of the hose becomes clogged. The latter is always inside the container. To fix the problem, you need to remove the hose from the oil tank and rinse the filter with gasoline.

Advice! Sometimes the oil cannot reach the tire if it is too thick. It is recommended to use a special lubricant for chains of electric and gasoline saws.

A broken oil pump can also cause oil to not flow to the chain of the saw. After cleaning the filter, hose and lubricant supply hole, turn on the power saw and observe whether lubricant is supplied to the bar, provided that there is enough oil in the tank. If lubricant does not flow, it is necessary to remove and disassemble the oil pump, check the serviceability of the spring or its other parts (depending on the model of the unit) and, if necessary, replace it with a new one.

The engine gets very hot

The cause of engine overheating may be jamming of the gearbox gear, if it is heavily contaminated with small sawdust, or if foreign objects have come into contact with it, for example, fragments of a spring or plastic parts. Try turning the gearbox shaft by hand with the brake off. If rotation is difficult, you will need to disassemble the gearbox and fix the problem.

A break in the motor windings can also cause the motor to overheat. In this case, it will not be possible to repair the motor yourself. You will need to seek help from a specialist.

The engine may also overheat if there is no oil supplied to the saw chain. This leads to poor sliding of the equipment on the tire, and as a result, to increased load on the electric motor. How to diagnose and eliminate this malfunction was described above.

The engine does not develop full power

First of all, you need to check the voltage in the network. It can sometimes decrease and lead to a drop in the power of the unit. Also, a drop in power is caused by gearbox jamming or brush wear. How to fix these problems was discussed above.

A faulty start button also causes similar symptoms. If, when checking this part with a tester, a malfunction is detected, it cannot be repaired. The button must be replaced with a new one. But if checking the above reasons does not produce results, then one can only suspect that the armature windings have burned out or an interturn short circuit has occurred in them.

The unit stops during operation

If the unit stops during operation, one or both brushes may be completely worn out. This is checked quite simply: remove the brushes from the holders and check their length.

Sometimes you come across brushes with a short conductor located inside the pressure spring. In appearance, such a brush will have a sufficient electrode length, but if you look closely at the spring, it will not be fully compressed due to the short conductor.

Also, the unit can stop during operation if there are faults in the gearbox. In this case, you will hear the hum of the engine, which will not be able to rotate. Often the unit stops due to jamming of the end sprocket located at the end of the tire due to its clogging. The sprocket's main job is to move the chain around the top of the bar. As in the case of a gearbox failure, you will hear the engine humming. You can check whether the sprocket is jammed if you try to manually stretch the chain with the unit turned off and the brake released: if it does not move, it means that jamming has occurred in the tire.

Some models of tires have a collapsible design, which allows you to replace the end sprocket on the electric saw tire when it is worn out or replace the bearings. If your unit has a permanent tire, try cleaning the entire space near the sprocket using a thin wire and some penetrating liquid, such as kerosene or WD-40. After cleaning and lubricating this part, try turning it. If the sprocket turns with difficulty or does not turn at all, the bearing is damaged. In this case, the tire must be replaced.

The electric saw does not cut straight

If the electric saw is pulled to the side, in most cases this is due to one-sided tire wear. The chain, passing along such a bar, warps, and the headset produces an uneven cut. If you look at the tire, it will be more worn on one side than the other. The problem is solved by replacing the tire, as well as the chain and sprocket, which have also suffered uneven wear. Even if a new tire is installed on the unit, previously worn parts will quickly render it unusable.

Advice! To avoid uneven wear of the tire, it is recommended to remove it at regular intervals (every 2 hours during intensive work) and turn it over to the other side.

List of oils by price/quality ratio

• Four-stroke Viking HD 10 W - 30 - used for small-sized 4-stroke engines, can be used regardless of the season, but the air temperature must not be lower than minus 15 degrees. It is sold in bottles (volume 0.6 liters), costs about 360 rubles.

Lubricant for 2-stroke engines:

• Volume 100 ml - you can buy it for 90 rubles, you need to add 1 to 50 to gasoline (20 grams of oil per liter of gasoline). This type is designed specifically for Stihl chainsaws. The main component is minerals. Can also be used for other models from different manufacturers.
• Stihl (volume 1l), intended for saws manufactured by Stihl. Diluted 1 to 50. The lubricant is based on minerals. The price varies within 500 rubles.
• Stihl with dispenser (volume 1l). Diluted in a ratio of 1 to 50. Price about 600 rubles.
• Stihl HP Ultra (volume 100 ml), ratio 1 to 50. Also made for Stihl chainsaws. This is synthetic oil. It has a high degree of lubricating benefits. Can also be used for other models of chainsaws with 2-stroke engines. The cost of this lubricant varies between 120 rubles.
• Stihl (volume 5 l), the ratio of lubricant product to gasoline is 1 to 50. Component - mineral additives. Designed directly for Stihl chainsaws with 2-stroke engines. Used for others too. The price is 1500 rub.
• Stihl HP Ultra with dispenser (volume 1 l), diluted in a ratio of 1 to 50, made for chainsaws from the manufacturer Shtil. Can also be used for other brands. Cost 1100 rub.