Adjusting the oil supply to the chainsaw chain
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main reasons why oil is not supplied stihl 180.
The chain lubrication system for your STIHL chainsaw consists of:
- guide rail;
- saw chain;
- oil pump.
The oil supply by the pump has a special regulation. Chainsaw chain lubrication occurs constantly during the operation of the machine. 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. During the operation of the chainsaw, the oil leaves the groove of the tire, 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.
Transmission lubricant is absolutely not suitable for work. In winter, it freezes, as a result, the oil system clogs up, you have to completely clean it.
In winter, chain lubrication requires special attention. Branded oil “M-20” thickens in severe frost and resembles petroleum jelly. Therefore, to work in winter, it is necessary to lubricate chainsaws with special winter oil, which has a more liquid consistency.
It is not always possible to purchase such a lubricant. To solve the problem, diesel fuel is mixed with oil, the viscosity is lowered. However, if the previously filled oil remains in the crankcase, then the addition of 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.
STIHL 180 repairs to the oil supply should be carried out when you see that your chain is dry. Look closely at the oil passages and clean them thoroughly. Channel clogging occurs quite often.
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 a worm gear. In turn, the rotation of the shaft creates a certain pressure in the oily mowing line, which causes the oil to move along it towards the tire.
Reasons for stopping the supply of oil to the chainsaw
A quick overview of why the oil in the chainsaw stopped being presented on the bus from the tank Support our channel with what you can.
Husqvarna 365 Chainsaw Bar Oil Output Adjustment
This feature is very convenient as it saves you money and does not waste extra oil.
The main reasons why STIHL 180 oil is not supplied
Self-repair of the STIHL ms 180 chainsaw. The chainsaw chain is not lubricated. Find and eliminate the cause of samos.
The first thing to do after you suspect that chain oil is not being supplied is to check the supply. Chainsaw chain lubrication system diagnostics STIHL chainsaw repair 180 ms frequent. This can be done in two ways. The first is described in detail in the instructions for the tool and consists in the fact that you need to start the chainsaw, add gas as much as possible and direct it towards any obstacle.
With a working lubrication system, oil will fly off the tip of the tire and a strip of oily drops will appear on the surface towards which the tire is directed. If there are any irregularities in the system, the surface will remain clean.
The second way is to remove the tire from the chainsaw and start it. With an increase in the engine speed, at the place where the tire shank is installed, oil will flow from the oil channel, if this does not happen, it is necessary to look for the cause of the malfunction.
We can say that they do not even apply at all. They all work in the same way.
The main parts are an aluminum cylinder rigidly fixed in the body and a steel plunger with a plastic gear rotating in this cylinder. How it works: There is one small hole at the blind end of the cylinder. There is another one opposite.
One of them is suction, the second is pumping. The plastic plunger gear has an oblique annular groove that aligns with the metal rod in the body.
Mechanics: When the plunger rotates due to the oblique groove, it also reciprocates back and forth for each revolution.
Hydraulics: When the sheared section of the end of the plunger approaches the suction port, the plunger is pulled back. a small vacuum is created, a portion of oil is sucked into the cylinder.
Turning the plunger by about half a turn. the cut-off section (of course, with the oil in it) approaches the discharge port.
At this time, the plunger moves towards the blind end of the cylinder. Some pressure builds up, oil escapes into the lubrication channel.
How to Adjust the Bar and Chain Oil Flow on Your Echo Chainsaw
Now. about the differences in design: The gear on the plunger can be metal. In this case, the worm on the crankshaft will be plastic, you can’t go anywhere, there must be a weak point.
The pump housing can be metal. Well, not bad, of course, but not essential. And the most important thing is the adjustment of the oil supply. In the first case, when the axial movement of the plunger is driven by an oblique annular groove.
Capacity adjustment is not technically possible If the longitudinal movement is carried out by an oblique cut at the rear of the plunger, it is possible to adjust the flow rate.
With the help of different options for the adjustable stop of the rear part of the plunger, the length of its axial movement is changed, and, accordingly, the amount of oil captured in one revolution of the plunger._
How often do I need to inject my chainsaw tire? And as I understand it, the grease should be of a consistency, like lithol approximately? Or the same transmission is acceptable?
I bought a new chain, installed it, it works fine. But after a couple of minutes, the hole in the tire for the oil supply is clogged, and the chain runs dry.
Literally enough for one cut. I take it apart again, clean it, run it. The chain is lubricated without sawing. And after one cut, the tire is again clogged with shavings.
I didn’t try to gazanut, because I didn’t have time, the chain almost wedged, I couldn’t turn it with my hand, and the tire and chain were terribly hot, the chainsaw stalled. Tell me what the problem is, this was not observed with the old chain?
There is a great suspicion that, in fact, the oil for lubrication is coming, only because of the large amount of dust (perhaps now you are sawing dry wood, or even with dust in general) falling into the groove of the tire and it is not visible on the chain.
And what is the condition of the tire itself? Especially important in this case is the state of the driven sprocket and tire spacers (the chain slides over them during operation) in those places where the teeth of the sprocket “dive” into the tire or appear from there when rotating.
Also, in case of excessive wear of the spacers, the groove depth of the tire could decrease below the permissible level and the chain shanks cling to the bottom of the groove when moving.
In this case, too, there will be excessive heating of the chain and bus. After all, apparently this chain for the bus is not the first.
In addition, the fact that the saw stalls when the chain is seized indicates that the clutch is not engaging. There is either dirt between the clutch cams and its cup, or the cup itself is deformed. The clutch springs may be stretched.
Considering the types of malfunctions in the lubrication system, two categories can be distinguished:
- 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 other structural features of a certain chainsaw.
“Symptoms” of a faulty lubrication system:
- the chain mechanism is dry, pale, there is no shine;
- the chain stretched quickly after installation;
- the guide rail heats up, its paint melts;
- the oil remains in the same volume in the tank, despite the intensive use of the tool;
- the cutting efficiency of the chain is significantly reduced.
All this indicates a malfunction of the lubrication system or its functioning intermittently.
- Dismantle the side tire.
- We start the tool.
- We gradually increase the speed, observing the end of the oil line.
If a consumable arrives, 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 the consumable does not arrive, then additional diagnostics need to be carried out, since, most likely, the problem is more serious.
Please note that it is not always necessary to dismantle the tire to check the lubrication system. Alternatively, the end of the tire is directed to the side (use a chock) from the direction of the cut, maximizing the speed, we keep the tire (its end) 10 centimeters from the chock. You will see the corresponding spots when the oil is fed.
The main malfunctions of the chain saw oil supply system can be divided into two main types: these are common problems inherent in all chain saws and individual ones, which can vary depending on the type of pump and worm gear installed on a particular model. We will begin to understand the problems in the order.
Chain lubrication problems
Once it has been determined that no oil is being supplied, further diagnosis is only possible if the oil system has been completely removed. Of course, in some situations, replacing the filter helps, but this is very rare.
Access to the oil pump of some saw models is possible only after complete disassembly, respectively, without the skills of repairing gasoline tools, it is better to entrust the repair to professionals.
If no lubrication occurs during operation, the highest potential for overheating remains. When no oil is supplied, the chain begins to stretch. With all this, the possibility of its jamming or spontaneous jumping off remains, and as a result, a person may receive severe injury.
The channels through which the fuel is supplied can be clogged with small particles, therefore it is purposeful to clean them from time to time. It is also essential to look at the oil level in the reservoir. Debris in the duct is a common prerequisite for chain brake failure. It can be bad for your job.
Continuous cleaning of the channels and general maintenance of the chainsaw will allow the tool to work for a long time.
However, what to do in this case, if our client is left with the advice, but the oil continues to flow. You need to make sure that the chainsaw is working correctly. It is entirely possible that it was assembled incorrectly. If no damage has been identified, it is recommended that you take it to a workshop. Sometimes it is necessary to change the pump, but this must be done provided that the saw is new. Old tools are leaking due to worn-out tank.
The current state of the chainsaw can only be assessed by specials. In the absence of knowledge or lack of confidence in one’s own abilities, it is better to entrust the repair of the tool to a specialist.
The main problems with chain lubrication that the owner of the chainsaw may encounter during the operation of the tool:
- The oil does not flow to the chain of an electric saw or chainsaw.
Cause: there is not enough oil for lubrication, the filter is clogged, the thread on the pump gear is torn.
Such a malfunction is eliminated by replacing the filter and adding oil to the crankcase, replacing the thread.
- Depressurization of the oil line (typical for STIHL chainsaws).
Reason: you can recognize such a breakdown by the presence of oil leaks in the lower part of the chainsaw. To eliminate the problem, a sealant is applied to the hose seat after fixing it to avoid oil leakage during further operation.
How to reduce the supply of oil to the chainsaw chain
If a fuel mixture is found on the spark plug, it means there is an excess of fuel. Chain (14 ″; 1.3 mm for STIHL 180 saws 14 rezer ps-9-1,3-50 low price, chainsaws (536. The reason may be a poorly adjusted carburetor or a violation of starting rules. See if the access through which gasoline is supplied is open.
To do this, open and close the fuel tank cap. It is also necessary to check the combustion chamber. After the work done, check the condition of the spark plug and change it if necessary.
Description of common malfunctions of the STIHL 180 chainsaw and how to fix them. A clogged breather may be the cause of the breakdown. Here I am telling and showing the proportion of mixing oil and gasoline for the STIHL chainsaw msec 180. I am not only telling, but also showing. Thus, when working in the fuel tank, a vacuum is formed, which affects the fuel supply. This can be due to an unregulated carburetor, clogged passages or air filter.
To correct the problem, the valve must be repaired, due to which the pressure is equalized when fuel is supplied. To do this, the breather should be carefully cleaned with a needle.
To adjust the carburetor, you need to use three screws. the highest and the lowest speed. Adjustment should be carried out strictly according to the instructions for repairing a chainsaw.
the main reasons why oil verse 180.
A quick overview of why the oil in the chainsaw stopped being presented on the bus from the tank Support our channel with what you can.
the main reasons why oil is not supplied stihl 180.
Oil may not flow to the chain only if there are 2 breakdowns. These include:
- difficulties with air leaks;
- breakdown of the oil pump drive.
The main characteristics of the chainsaw chain.
The main reason for the breakdown is air leaks. This can happen due to the depressurization of the oil hose during the operation of the chainsaw. In this case, you need to remove the hose from the hole. This must be done in the area where it is connected to the crankcase. Then the hose sits on the sealant and is set to its normal position. If this did not help, most likely, elasticity was lost. For the upcoming operation of the chainsaw, it is purposeful to change the hose.
Another reason is a breakdown of the oil pump drive. In the common people, this part is called a worm. When the drive fails, no oil will flow to the chain. The oil pump drive is a round plastic ring with grooves inside. The constant introduction of the chainsaw leads to wear of the internal parts, and as a result, the iron hook inside the drive is chipped. After this breakdown, oil stops flowing to the chain.
the main reasons why STIHL 180 oil is not supplied.
Self-repair of the STIHL ms 180 chainsaw. The chainsaw chain is not lubricated. Find and eliminate the cause of samos
TOP-5 popular oils for chainsaw chain lubrication
Chainsaw chain oil brands rating. five leading global brands:
- Ökoplus XS 68 is biodegradable, for saw chains, made from vegetable oil. Complies with German biodegradability, forestry and forestry machinery regulations.
- Liqui Moly Suge-Ketten Oil 100 is a high quality mineral chain oil that has excellent adhesion properties and can be used at both high and low temperatures.
- STIHL BioPlus. for high speed chains. Suitable for high power chainsaws operating in harsh conditions.
- Vegeil Husqvarna. plant-based, extremely sustainable and biodegradable.
- Oregon. all chain oils of the latest generation are made on the basis of high molecular weight compounds, keep the chain and bar from wear, protect against corrosion.
Choosing the right oil
After you purchased the device, the question immediately arose: what kind of oil should you put in your STIHL chainsaw? If you properly take care of the equipment intended for work in the construction and gardening sector, then you can significantly increase the level of activity of the direct operation of the device itself not to encounter breakdowns of a various nature.
It is worth noting that the most important factors in the immediate operability of the device is the use of the correct lubricant and fuel. Although the main problems for the owners of this technique are precisely with the choice of oil for their “favorites”. At this point you can find out how to select a lubricant specifically for STIHL chainsaws.
Chainsaw is a hand tool designed for working with wood material. It is equipped with a gasoline internal combustion engine. It is a complex constructive device. During operation, the factory settings are violated, therefore, periodically it is required to carry out such a procedure as adjusting the chainsaw.
The carburetor is one of the components that ensure the stable operation of the chainsaw. The speed of the speed set, the output power, the uniformity of cutting depends on it.
Adjustment of the unit is reduced to setting the minimum and maximum revolutions of the internal combustion engine, as well as setting the idle speed. This is done independently or with the help of a professional master.
With a properly adjusted, clean carburetor, the engine will:
- immobility of the chain in idle mode;
- smooth and fast set of speed of the chainsaw engine;
- during operation, the gasoline unit sounds like a 4-stroke engine.
Adjusting the oil supply on a STIHL chainsaw
The most compact and powerful enough is called the STIHL chainsaw. It allows you to perform various operations with wood. This model is the most demanded device because of its good cutting ability. The tool has many additional accessories that add convenience to the work.
Chainsaw tuning work
Chainsaw adjustment work is divided into two groups:
- setting up individual nodes;
- preventive tool maintenance.
STIHL semi-synthetic oil
Very often, the owners of such chainsaws wonder what kind of oil can be used for the saw. Her work can be influenced by:
- cutting headset;
- wood species.
To solve this problem, STIHL has developed a multipurpose semi-synthetic oil. It fits all high speed chainsaws. Chains can be lubricated with this oil under all conditions. The tool will work flawlessly.
Since STIHL semi-synthetics are intended for chains, they are made from special high-quality materials, do not contain various toxic substances that can cause cancer. The oil fully meets the most stringent environmental requirements.
The Russian climate is rather harsh. In our country, there are areas where frosts often exceed values of 20 ° C. The latest STIHL chain saw oil has been specially developed for cold working conditions. In this frost, it demonstrates excellent fluidity.
Special additives in the oil do not allow oiling of the cutting set, they will extend the life of other lubricated parts as well. The saw with this oil can be started easily even after long storage.
The use of this chain lubricant will reduce the wear on the saw chain. Due to the high endurance of the oil at high temperatures, the cutting attachment is ideally protected. Such oil is not afraid of peak temperature load. Smoke almost never appears.
Certainly, whoever owns chainsaws knows how important is not a bad and high-quality oil. And, everyone dreams, there is no need to say what is really, that this is a typical “life force” of this device for the production of real and effective work. Today there is an unlimited number of oils and, as the proverb says, the choice is very large.
But, often, not every owner of electrical engineering of this kind knows what kind of oil you need to take for your own steel friend, so that the work of the chainsaw is not only easy, but also productive. Therefore, below will be considered the issue of the correct choice of the STIHL manufacturer. Also, what it is, to assist the chainsaw in its time in its specific activities, and not harm it. What is needed, let’s get started.
Chain tension adjustment is carried out:
- when installing the chain on a chainsaw after sharpening;
- when the tension is released during the operation of the chainsaw;
- when replacing a worn out or broken chain with a new one.
The chain is tensioned with a special screw. Most often, for convenience, it is placed on the side surface. The tension force is adjusted empirically. The normal position of the chain is determined by the bar, while the lower part of the chain cannot have a gap, since it should not sag.
The degree of tension is determined manually. with a hand wearing a protective glove, the chain is scrolled. With the normal arrangement of the chain in the tire, the movement of the cutting tool should be carried out freely, without much effort.
Note: when adjusting the chain tension, the brake must be in a free state. unlocked.
Advice: when using the saw in winter conditions, the tension must be carried out on a heated saw. the metal elements expand from the temperature rise and the chain can sag. At the end of the work, the tension should be loosened. during cooling, an excessive load may occur from the contraction of the metal during the cooling process.
The principle of the chainsaw
The main internal combustion engine is started by means of a starter. The engine speed is controlled via the carburetor, which in turn is controlled by the accelerator. Upon reaching a certain number of revolutions, the automatic clutch begins to transfer torque to the chain.
To obtain more power and speed, more fuel is supplied through the carburetor via the accelerator. This is important during the sawing process, as the power of the cutting tool will be directed towards the wood.
Let’s talk about the oil supply device directly to the chain
Mainly willing to put Accent on what remains to be done for our customer, the chainsaws of the manufacturer STIHL are quite small, but nevertheless, they are very massive. These features attract future buyers of this kind of equipment to the models of this company. In addition, you can easily and easily create various manipulations with this device regarding work with wood (see how to cut a tree).
Individual malfunction of the lubrication system STIHL MS 180
In view of the fact that the STIHL MS 180 is one of the most common models of chainsaws, I would like to dwell on one inherent only malfunction and describe a way to eliminate it without replacing parts.
Quite often, on the STIHL MS 180 chainsaw, there is a depressurization of the oil line in the place where the oil line from the tank is installed in the saw body. The malfunction can be determined by the characteristic grease leaks on the bottom of the tool.
To eliminate the malfunction, it is necessary to remove the chainsaw handle, remove the hose from the bore, clean and degrease. After all these manipulations, apply sealant to the seat of the hose and install it in the body of the chainsaw.
For more information on troubleshooting and full diagnostics of the lubrication system of the STIHL chainsaw, you can find out by watching the video, which shows step by step the process of disassembling and repairing the lubrication system.
Chainsaw chain lubrication system
One of the important chainsaw systems, without which work is impossible, is the forced lubrication system of the chainsaw chain. It’s not a secret for anyone that at the moment the saw is operating, the chain friction against the tire of the chainsaw, which causes it to heat up and premature wear. To soften friction, the chain mechanism must be constantly lubricated.
Principle of operation
The main unit of the system is the pump. The principle of its operation is as follows. With an increase in engine speed, a gear mounted on the main shaft drives the pump shaft through a 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.
The end of the oil channel is located at the point of contact of the tire with the tool housing, where there is a longitudinal groove, on which, when the tire is installed, its oil channel falls.
The groove is necessary to ensure the supply of oil to the tire, regardless of the degree of chain tension of the chainsaw. Simply put, no matter what position the tire is in at the time of operation, oil will get onto it through the groove.
Further, a chain is included in the lubrication process, on the links of which, depending on the model of the chain, there is either a groove or a hole through which the oil is accelerated throughout the tire. With an increase in engine speed, the oil flow rate also increases.
Some models of chainsaws are equipped with pumps that additionally have a flow rate adjustment, and if necessary, the amount of oil supplied by the lubrication system can be increased or decreased.
This function is quite convenient, as it allows you to save money and not waste extra oil.
Chainsaw chain lubrication system
To supply oil for lubricating the chainsaw chain, a special pump is used in the tool, which is dosed, depending on the number of engine revolutions, supplies lubricant to the saw bar.
The system uses oil to lubricate the chainsaw chain, which has increased adhesion properties, this is necessary to evenly distribute the oil around the entire perimeter of the tire and keep it on it even at high chain speeds. Let’s take a closer look at the oil supply system implemented in modern chainsaws.
Lubrication system malfunctions and how they are eliminated
The main malfunctions of the oil supply system on a chainsaw can be divided into two main types, these are general malfunctions inherent in all chainsaws and individual ones, which may differ depending on the type of pump and worm gear installed on a particular model. Let’s start sorting out faults in order.
It is prohibited to use the chainsaw if the chainsaw is not lubricated. This adversely affects the tire, drive sprocket and chain, and can also result in serious repair costs.
Most common malfunctions
- Broken oil hose. It can sometimes be detected by visual inspection. The problem is solved by replacing the defective part.
- The absence of threads on the shaft of the oil pump, its replacement will help.
- Defective thread on the pump drive gear is similarly solved by installing a new part.
- Absence of a corkscrew of the main shaft (relevant for some models of tools, for example, Homelite). You can fix it by installing instead of the native corkscrew, suitable for the diameter of the studs, cutting it to the required length.
- Blockage in the line. Can be removed by blowing with compressed air or mechanically using a wire of suitable diameter.
- Clogged filter element.
- The STIHL MS 180, which has a one-piece pump, often clogs. You can try to rinse in clean gasoline if it does not help replace.
- In Chinese chainsaws (Gypsy), very often cuts off the grooves on the main gear, through which the force from the sprocket is transmitted to it.
Signs of a malfunction of the lubrication system, checking its performance
- Chainsaw chain is dry and has a pale shade without shine.
- The chain stretches relatively quickly.
- The tire is very hot and can even partially melt the paint.
- The oil from the tank is practically not reduced.
- Decreased cutting efficiency on a sharp chain
All these signs indicate that the lubrication process is not working properly. In order to check the oil supply by the lubrication system, it is necessary to remove the side tire of the chainsaw and start it. Further, you need to slightly increase the speed while observing the place where the oil line ends. If oil is flowing in, it is likely that there is not enough oil for proper lubrication and the filter needs to be cleaned or replaced and, if possible, adjusted the flow. In the case when it is not received, the problem is more serious and requires further diagnostics.
There is a way to check the oil supply without removing the tires. To do this, it is necessary to direct the end of the tire towards, for example, a freshly sawn block from the cutting side and maximize the speed, while trying to keep the end of the tire at a distance of no more than 10 cm from the block. If oily stains begin to appear on its surface, it means that oil is being supplied.
After it has been determined that oil is not being supplied, further diagnostics is possible only if the oil system is completely removed. Of course, changing the filter helps in some situations, but this is very rare.
Access to the oil pump of some saw models is possible only after complete disassembly, therefore, without the skills to repair gasoline-powered tools, it is better to entrust the repair to professionals.
If oil is supplied to the chain in excessive quantities, and not only during the operation of the saw, but also at idle speed, manual adjustment should be made (if the pump design allows this). This is done with a screw located on the housing close to the guide rail, usually from the bottom or the side. Tightening the screw decreases the oil supply, loosening it vice versa. If the adjustment does not help, it is necessary to check the serviceability of the pump, as well as inspect the tire. it is possible that a gap has formed at the point of its connection with the body, through which oil flows past the chain.
Lack of oil can be caused by several reasons, for each of which there is a solution:
- Defective oil pump. As a rule, it consists in an unusable gasket. In order to replace it, it is necessary to carefully disassemble the pump so as not to damage its moving parts. Then a new gasket is installed, after which the pump is assembled and installed in place.
- Breakage of the oil hose. If the pump gasket is in good order, or its replacement did not lead to a result, you should check the tightness of the hose. If it is defective, it must be replaced. Otherwise, it will not be superfluous to clean it and secure it with a sealant.
If the reason lies not in a pump breakdown, 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 mess with your chainsaw but need oil flow adjustments? Ask for help from our specialists who will diagnose and repair the chainsaw, and, if necessary, will carry out repair work and adjust the lubrication level. Your saw will be as good as new!
Most modern oil pumps for chain chainsaws are arranged in the same way: a cylinder (photo 1, pos. 2) is placed in the body (photo 1, pos. 2), into which a plunger (photo 1, pos. 3) is inserted, making rotational-translational movements in it.
The cylinder in the lower part has two holes (in photo 1, pos. 4, only one of them is visible): through one oil it is sucked in, into the second it is pushed out.
The plunger 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 of the cylinder. On a forward movement upward, the flat first opens the inlet (while closing the outlet) and creates a slight pressure drop. As a result, a portion of the oil is sucked into the cylinder. Then, pivoting, the plunger moves downward, opening the outlet with a flat (while closing the inlet) and pushing the oil out of the cylinder. This is how it is fed to the tire in small portions. High cycle rates create a constant and continuous flow of lubricant.
There are two types of oil pumps in use: variable flow and fixed flow. In the first case, the plunger gears have an oblique tooth, and the translational upward movements are provided by an additionally installed spring. The oil flow is controlled by changing the stroke length of the plunger in the cylinder. An example is an oil pump for Chinese saws with an engine capacity of 45-52 cc
In the case of an unregulated oil pump, there is an oblique closed groove on the plunger, against which the fixed stop of the body abuts. Rotation causes the groove to slide along the stop, and since it is oblique, this movement makes the plunger move forward and backward. With this scheme, it is impossible to limit the stroke of the plunger and the oil is supplied in constant quantities. Example. the oil pump of the Husqvarna chainsaw 137, 142
The torque from the engine to the plunger is transmitted through a special drive, which also has a gear. the counterpart of the gear on the plunger.
chain lubrication on electric saw rd-c08
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Saw chain lubrication
The lubrication of the saw chain and bar is very important. The design of the chain saws includes a pump that supplies oil from the reservoir to the cutting system through special holes. Further, the saw chain itself distributes it. The grease is captured by the shanks and distributed throughout the entire bar and chain. For additional retention of lubricant in the chainsaw, special holes are drilled in the shanks or channels are milled. Also, in the chain lubrication system for chainsaws, connecting links are often involved, in which additional grooves are made for lubrication. Sufficient lubrication reduces friction and heat levels, thereby not only increasing the service life of each saw element, but also reducing the level of saw chain elongation. Therefore, it is in the interests of every saw owner to monitor the chain lubrication process so that in the event of a breakdown you do not have to look for new chains for chainsaws.
The lubrication process is quite simple: as the saw chain accelerates, small oil droplets form an oil trail on any light-colored surface if the end of the bar touches it. If there is no trace, there is no lubricant and you need to check for the presence of oil, clean the groove of the tire, adjust the saw pump, etc.
And one more thing: in modern saws, it is allowed to install chains and bars of different lengths, but before using a new headset, you need to make sure that the oil pump installed in the saw will cope with its processing.
In the course of long-term operation of the chainsaw, some of its elements and assemblies may become unusable. One of the most vulnerable components is the oil pump. In this regard, many owners of saws have a question about how to repair the oil supply on a chainsaw.
The task 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 lubrication of the chain deteriorates, which reduces the efficiency of the chainsaw. In some cases, this leads to breaking the circuit. To prevent negative moments, it is necessary to repair the oil supply in a timely manner. How to do it?
Chainsaw chain lubrication
Regardless of the type of chainsaw and the frequency of its use, caring for the saw and its spare parts is mandatory, because if you do not monitor the condition of the tool, it will very soon become unusable. Chainsaw chain lubrication, teeth sharpening, saw refueling, checking the tightening of nuts and candles. this is the key to the long and correct functioning of your tool.
During long-term operation of the chainsaw, its chain may become dull, and the cut will be significantly complicated. Therefore, it is necessary to periodically sharpen and lubricate the chain on chainsaws. Chainsaw chain lubrication is carried out with a special oil (although automobile oil can also be used). When the fuel mixture is completely used up, it is important that a small amount of chain oil remains. Separately, I want to say about Oregon chainsaw chains. these chains are very durable. The long service life of these chains is achieved by features such as automatic lubrication. This is why Oregon chainsaw chains last long and function well.
DIY chainsaw repair
In fact, this is a worm gear pair. The oil pump drive is driven either by the drive chain sprocket (photo 4, pos. 1), or by the crankshaft itself (photo 4, pos. 2).
In the first case, the plunger is mechanically connected to the drive sprocket and rotates only with it. Photo 4 pos. 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 spins, the drive spins with it. At idle speed, in this case, there is no oil supply.
In the second case, the drive is rigidly fixed on the shaft and constantly rotates with it. Photo 4 pos. 2 shows the oil pump drive of the Husqvarna 137, 142 chainsaw. It is pressed onto the crankshaft shank and rotates with it constantly. Therefore, oil is supplied constantly, even if the saw is in idle mode.
Usually, one of the gears (either on the plunger or on the drive) is made plastic in order to secure a part with a more complex structure or complex installation. The plastic part will break and wear out first.
On some saws, the driven oil pump can be additionally closed with a special cover (photo 5, the oil pump cover of the Chinese chainsaw 45-52 cc), which protects the worm connection and the pump itself from dirt and wood dust. On some saws, such as the Husqvarna 137, 142, the oil pump housing itself covers the connection between the drive and the plunger, thereby acting as a protective cover.
A certain amount of lubrication is required for the bar and chain to function properly.
In order for the design of the lubrication system existing on the chainsaw to give it out, the oil must have a suitable viscosity. Judging by the mechanics, the oil pump does not care what kind of oil you use: automotive, transmission or special. The main thing is that the viscosity is within the specified permissible range. However, this does not mean that any oil can be poured. Chain oil’s job is not to save you money on buying it, but to lubricate the bar and chain parts. Different oils do this differently. But more about this in another article “Chain oil. What to pour? “.
What to check before working with a chainsaw
Checking the tightening of the nuts should be done before each start of work with the chainsaw. The fact is that a tool such as a chainsaw has a lot of vibration, and because of this, the screws and nuts in it can loosen. Therefore, it is very unsafe to operate a chainsaw in which parts are poorly fixed.
Checking the spark plugs of the chainsaw for carbon deposits (it should not be there) also needs to be done, and if carbon deposits are found, replace the spark plug with a new one.
Chainsaw chain lubrication
I want to use the TAD 17 chain on the STIHL 250 chainsaw. In winter it is very thick. will not the oil pump be worse from this, will it fail from overload? And if you can. what is the principle, in the pump, supplying oil to the chain?
The oil pump, which is put on 180. 250 Calms, is generally practically unkillable. it has a brass cylinder. Even working off eats twice as long as aluminum.
And the principle of operation is very simple. It’s a pity, there is no illustration, and I have not seen it anywhere. In words. two parts, a cylinder and a plunger rotating in it. The plunger has a milled flat at the end. When rotating, the plunger moves slightly back and forth.
Two holes are made in the cylinder opposite each other. When the flat of the plunger comes to the intake hole, it is slightly pulled out of the cylinder. a vacuum is created and a little oil is sucked in.
When the flat turns to the discharge port, the plunger is pushed into the cylinder. pressure is created, oil flows through the channel to the tire. As you can see, in principle, you cannot damage the pump with as much thick oil as you like. it just won’t go, that’s all. _
Is it normal if oil leaks out of the reservoir when the chainsaw is idle? Those. if you have to cut a little, then pour a little? Otherwise, during the inactivity of the saw, the oil flows out of the tank completely.
Not. This not normal. The problem is either with the oil pump or with the reservoir itself. In general, oil and fuel consumption is usually 1 to 1. _
How to lubricate the leading sprocket of a tire on a chainsaw? For example, is Mobil or Jcb hydraulic grease suitable? What do you think?
they smear the asterisks on all tires (except for Shtilev ones), if you do not smear them, then the bearing may crumble, and then the tire will end, but about Calm tires. on the one hand, this is kind of a plus, and on the other hand, I saw Calm almost new tires with burned out bearings. _
The chainsaw drives the chain lubrication oil. At idle it pours very slowly, you give it gas. it pours in a stream. For five minutes of work, all the oil is poured out.
Does not respond to the position of the adjusting screw. Also, a little (0.5-1 mm), the sprocket, which rotates the chain, is loose. Who faced such a thing?
It is necessary to remove the asterisk and sort out the oil pump, and check the hoses for breaks. The leading sprocket must have a slight backlash. It should not be rigid, the vibrations will go to the crankshaft. _
The holes coincide when I put it on, maybe when the chain is tightened, the hole moves off because of this, oil does not get on the chain, but the chains, you can use one, how to blunt, remove, put a new one, sharpen the old, etc. in a cycle of three chains, do it for now the tire has not worn off?
The oval hole for lubrication on the body of the chainsaw is made in such a way that, in any position of the tire within the adjustment range of the chain tensioner, the alignment of the lubrication holes on the tire and the body does not disappear.
Ideally, a set of chains, when used on the saw one by one in a cyclic fashion, and the bar should fail at the same time. There are two lubrication options. Well, I mean. through what the oil is supplied.
Most tires have a separate hole for supplying lubricant to the chain, and these larger ones are used for tensioning. And some (and quite a few) do not have a separate lubrication hole.
And a free pull hole is used for lubrication. In this case, it will necessarily communicate with the tire groove. You can check with a wire. This is neither good nor bad, this is a feature.
So. in the second case, quite large oil losses are possible if the sprocket cover does not fit tightly. Then it just goes right through (unlike tires with a separate hole), and drips down. _
After a minute of running the chainsaw at idle speed several times I pressed the gas a little, the oil to lubricate the chain began to flow very strongly onto the chain, which already formed a puddle of oil under the saw. Where is the chain oil adjustment screw? And how to make this adjustment correctly?
Your model does not have regulation of the oil supply to the chain, oil is supplied automatically. Carefully inspect and thoroughly clean the oil suction holes on the bar, carefully install the bar and chain. In theory, it should help.
If a puddle of oil forms under the saw, then the most likely is a sloppy tire or a skewed clutch cover, as a result of which there is a gap between the outlet of the oil pump and the lubrication hole of the tire, into which the oil goes. _
Tell us more about the oil pumps installed in chainsaws.
Very rarely, non-plunger pumps are used on modern chain saws (including electric ones).
The principle of operation and the device 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. During the movement of the chain, oil is fed into a special channel located on the guide bar. At idle speed (when the drive sprocket does not rotate), the pump does not provide lubrication. this is done to save money.
The speed and volumes of lubricant supply to the chain are directly dependent on the number of sprocket revolutions. In some models of chainsaws, a manual adjustment system is provided using a special screw located on the body of the device. On expensive saw models, the oil supply is automatically adjusted during operation.