Adjusting the Oil Supply to the Chain of a Chinese Chainsaw

To supply oil to lubricate the chainsaw chain, the tool uses a special pump, which delivers lubricant to the saw bar in a dosed manner, depending on the number of engine revolutions.

The system uses oil to lubricate the chainsaw chain, which has increased adhesive properties; this is necessary for uniform distribution of oil along the entire perimeter of the bar and retention on it even at high rotation speeds of the chain. Let's take a closer look at the oil supply system implemented in modern chainsaws.

How to adjust the supply of oil to lubricate the chain in a chainsaw, where and how is this done?

Adjusting the oil supply to the chainsaw chain is carried out by adjusting the stroke of the plunger of the oil pump supplying oil from the tank.
This adjustment screw is usually located at the bottom of the chainsaw on the crankcase housing on the sprocket side.

It’s hard to call it a screw, since it’s actually a shaft with a cam that limits the stroke of the oil pump plunger and has a maximum of one turn of adjustment, and in the standard factory setting it is set strictly in the middle.

You can clearly see this adjustment screw on this chainsaw.

To reduce the oil supply, turn the screw in the “-” direction, and to increase it in the “+” direction; the marking will be applied either to the crankcase body or to the plastic next to the adjustment screw.

Here is an example of a marking with an arrow and the words minimum and maximum.

Structurally, chainsaws are different and not all models provide manual (mechanical) adjustment of the oil supply to lubricate the chain.

In a chainsaw, a deposit (oil) is used to lubricate the chain, which increases or decreases the supply of oil to lubricate the chain depending on engine speed.

And the whole system consists of an oil tank, the same pump, oil wires (hose, or tube, in other words) filter elements, etc.

That is, before adjusting the feed, you need to read the instructions for the chainsaw, because the adjustment (if it is provided at all) may have its own nuances depending on the model.

Turn the chainsaw over and pay attention to the “window” marked “MAX,MIN”

Opposite this “window” with markings, there is a recess

Adjustment can be made with a regular flat-blade screwdriver.

Insert the screwdriver into the “socket”.

By turning the screw in the “MAX” direction, we increase the oil supply, in the “MIN” direction, we decrease it.

Instructions for Chinese

To correctly configure the carburetor of a Chinese chainsaw, you must first remember the factory settings of the device, then turn on the engine. Subsequently, you will have to leave it running for several hours in order to accurately set your own parameters. Sometimes work is carried out only after ten minutes of engine operation, but many Chinese-made models require special handling.

Chinese chainsaw model

Adjustment procedure:

1. Activities begin in idle mode . Using the adjusting screws, you need to achieve a systematic increase in engine speed, so you should first let it run at low speeds. A deviation from the norm is the movement of the chain along the bus. In this case , you need to adjust the outer screws to the optimal position so that the chain remains motionless.
2. The transition to medium speed speed is carried out . Sometimes the engine starts to smoke. This defect can be eliminated by tightening the screw to supply a leaner fuel mixture.

In this case, the smoke will disappear, but the engine speed will increase. You need to adjust the settings until you reach a level where, when you press the throttle, the engine smoothly picks up speed, and no sudden jerks or interruptions are heard.

• The device's engine is being checked . The chainsaw is switched to minimum speed, and then the lever is quickly pressed. When pressed maximally, it is held for 3 seconds. If there are problems with the engine, you need to gradually loosen the screw until the optimal position is reached.
• The chainsaw should work for several hours in real conditions . You need to cut wood, and then inspect all the elements involved in this event. If there are deviations, they must be corrected using adjusting devices. When all defects have been eliminated and the optimal settings have been established to supply correctly concentrated fuel, the device setup process can be considered complete.

Related Posts

Chain lubrication system

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

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Chain lubrication system

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

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

Lubrication system design

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

The main components of the lubrication system are:

The oil reservoir is usually located in the engine crankcase.

Operating principle

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

Repairing Husqvarna chainsaws with your own hands: repairing the carburetor, starter

The risk of injury in the event of an emergency is minimized due to the high-precision operation of the braking device, which is activated when the upper shield moves slightly in the frontal direction.

Experts characterize the Husqvarna 142 saw as a fairly comfortable to use, productive, reliable and durable household tool that meets the requirements of modern technical and operational standards.

→ BUY ANALOGUE STURM AT THE BEST PRICE

Chainsaws of the Husqvarna brand are distinguished by a large number of priorities, such as productivity, working power and others. But even such powerful assistants can fail during wood processing. In this case, operational or planned repairs of Husqvarna are inevitable. Various factors can affect the operation of a chainsaw:

1. Low quality fuel material;
2. Ingress of homogeneous bodies into mechanism blocks;
3. Overheating of mechanism interface blocks;
4. Wear of parts when using Husqvarna in active operating mode;
5. Loss of contact between connecting mechanisms and systems.

At every moment, you should not hope that the reason will go away on its own or that you will be able to calmly work until the end of the season, work task, or shift. And if it is impossible to take it to a workshop, timely repair of the Husqvarna saw with your own hands will be the best solution. After all, timely maintenance will avoid at least three things:

1. Global failure of the instrument.
2. Waste on the purchase of a new gasoline saw.
3. Working downtime.

Adjusting the Oil Supply to the Shtil Chainsaw Chain

Of course, anyone who owns a chainsaw knows how important good quality oil is. And, everyone dreams, there is no need to say what it really is, that this is the typical “life force” of a given device for producing real and effective work. Today there is an unlimited number of oils and, as the saying goes, the choice is very large.

But, often, not every owner of electrical equipment of this kind knows what kind of oil to use for his steel friend, so that the operation of the chainsaw is not only easy, but also productive. Therefore, below we will discuss the issue regarding the correct choice of the manufacturer of the calm. Also, what it is to help the chainsaw in its time of its specific activity, and not harm. Let's get started with what we need.

Let's talk about the device for supplying oil directly to the chain

Mainly we would like to emphasize that what remains for our client to do is that the chainsaws from the manufacturer Shtil are quite small in size but, nevertheless, they are very massive. These features attract future buyers of this type of equipment to the models of this company. In addition, you can easily and simply create various manipulations with this device regarding work with wood (see how to cut down a tree).

Device for supplying oil to the chain

Adjusting the oil supply of the Shtil 180 chainsaw.

Shtil chainsaws also have a high level of cutting ability . Moreover, this equipment is equipped with the latest accessories (see Attachment for a grinder chainsaw), which further contribute to the convenience and ease of use. But actually, let's talk directly about the device itself, which the manufacturer equipped its chainsaws with. So, the direct chain lubrication system of the Stihl chainsaw consists of:

• Guide tires;
• Saw chains;
• Oil pump.

It is worth noting that the direct oil supply through the pump has special adjustment . Another important fact is that the chain is lubricated throughout the operation of the chainsaw. It is for this reason that this part serves its owner for quite a long time.

Undoubtedly, during operation the chain must be systematically lubricated, so oil for its direct lubrication must be continuously supplied to its surface. Since this is the entire direct design of the instrument.

During operation of the device, oil directly begins to come out of the tire groove and is immediately absorbed by sawdust.

That is why the process of lubrication of the chain area is carried out automatically . But it is worth noting that there are models that have a so-called “dosage” of oil, which must be supplied directly to the chain. And naturally, models whose price category is quite low have only a manual pump that operates directly through the action of a drive, which is located on the handle.

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.

What you need to have for setup

Each carburetor owner must have the necessary tools to adjust this system. There are three adjustment screws that are located on the body of the device. They have their own markings:

• L - screw for correcting low speeds.
• H - screw for adjusting high speed.
• T - regulates idle speed , in most cases it is used for experiments.

Chainsaw air filter

Before adjusting the carburetor, you need to prepare the device:

1. The engine warms up, that is, it starts about 10 minutes before repairs, and turns off when starting work (see how to start a chainsaw).
2. The air filter is checked and washed.
3. The chain is stopped by turning screw T until it stops (see chain oil

To carry out a safe repair, you need to prepare a flat surface where you can carefully place the device and the chain in the opposite direction. Need a tachometer. It determines whether there is a malfunction in the carburetor. When turning the screws, the sound should be perfect and absolutely smooth. If you notice squealing notes, the mixture is oversaturated.

Chainsaw chain lubrication system

To supply oil to lubricate the chainsaw chain, the tool uses a special pump, which delivers lubricant to the saw bar in a dosed manner, depending on the number of engine revolutions.

The system uses oil to lubricate the chainsaw chain, which has increased adhesive properties; this is necessary for uniform distribution of oil along the entire perimeter of the bar and retention on it even at high rotation speeds of the chain. Let's take a closer look at the oil supply system implemented in modern chainsaws.

Design features

Working comfort is increased due to good balance, improved vibration damper design, and a significant reduction in noise level.

Despite the significant improvement in performance characteristics, the price of the Carver 45-15 saw has increased slightly compared to previous proprietary designs.

The design of the chainsaw takes advantage of easy start systems and automatic chain lubrication with adjustable pump performance. The compact placement of internal equipment is combined with convenient access to the air intake filter, fuel system adjustment components and chain tensioning mechanism.

• combination of classic instrument layout with modern trends in industrial design;
• weights with power characteristics;
• simple maintenance with an extended service life between repairs.

Lubrication system design

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

The main components of the lubrication system are:

• an oil tank located, as a rule, in the engine crankcase.

• The filter element is installed in the tank.
• The oil line is a small diameter hose made of oil-resistant rubber.

• The heart of the system is the oil pump.

• The worm gear transmits force from the engine to the pump.

• The chainsaw tire can also be considered an element of the lubrication system, since it has special holes for supplying oil. By the way, the chain itself is involved in transporting oil and, accordingly, also has some elements designed specifically to provide lubrication.

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.

Principle of operation

The main unit of the system is the pump. The principle of its operation is as follows. As 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 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 into which, when installing the tire, its oil channel falls.

The groove is necessary to ensure the supply of oil to the bar, regardless of the degree of tension of the chainsaw chain. Simply put, no matter what position the tire is in at the time of operation, oil will get onto it through the groove.

Next, the lubrication process includes a chain, on the links of which, depending on the chain model, there is either a groove or a hole through which the oil is dispersed throughout the tire. As engine speed increases, the oil flow rate also increases.

Some models of chainsaws are equipped with pumps that additionally have capacity adjustment, and if necessary, the amount of oil supplied by the lubrication system can be increased or decreased.

This function is quite convenient, because it allows you to save money and not waste extra oil.

Consequences of unjustified savings

Many owners of budget chainsaws equipped with simple lubrication systems with constant performance are concerned about increased oil consumption. The average price of a quality product is three times less than the cost of its motor counterpart, however, cases of using various oil surrogates are not uncommon.

Spindle, diesel and motor oil used in different proportions due to their working properties are not suitable for complete lubrication of the headset.

It’s not difficult to actually calculate how much you can save by using a surrogate. Unfortunately, the profit received cannot compensate for the accelerated wear and tear of the old one and the costs of purchasing a new headset.

The constant use of substitutes reduces the service life of expensive saw sets by 30-40%. Wear is significantly accelerated if you fill the lubrication system of a chainsaw that has exhausted its service life.

None of the compositions proposed by users is suitable for complete lubrication and cooling of the chain or filling into the gearbox. Not the best replacement option is M8 winter motor oil, which, in conditions of a general shortage, was used to refill Druzhba chainsaws and their prototypes.

Lubrication system malfunctions and how to fix them

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 vary depending on the type of pump and worm gear installed on a particular model. Let's begin to understand the faults in order.

Operating a chainsaw without lubricating the chainsaw chain is prohibited. This has a detrimental effect on the bar, drive sprocket and chain, and can result in significant repair costs.

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

• The chainsaw 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.

Troubleshooting

Once it has been determined that oil is not being supplied, further diagnosis is only possible if the oil system is completely removed. Of course, in some situations replacing the filter helps, but this is very rare.

Access to the oil pump of some models of saws is possible only after complete disassembly; therefore, without having the skills to repair gas-powered tools, it is better to entrust repairs to professionals.

Most common faults

1. Broken oil hose. It can sometimes be detected by visual inspection. The problem is solved by replacing the faulty part.
2. There is no thread on the oil pump shaft; replacing it will help.

3. A defective thread on the pump drive gear can be similarly solved by installing a new part.
4. Lack of main shaft corkscrew (relevant for some instrument models, for example, Homelite). You can fix it by installing a nail of a suitable diameter instead of the original corkscrew, cutting it to the required length.
5. Blockage in the line. Can be removed by blowing with compressed air or mechanically, using a wire of a suitable diameter.
6. Filter element clogged.
7. The Stihl MS 180 tool, whose pump is not dismountable, often gets clogged. You can try to wash it in clean gasoline, if that doesn’t help, replace it.
8. In Chinese chainsaws (Gypsy), it very often cuts off the grooves on the main gear, through which the force from the sprocket is transmitted to it.

Individual malfunction of the Stihl MS 180 lubrication system

Due to the fact that the Stihl MS 180 is one of the most common models of chainsaws, I would like to dwell in more detail on one fault inherent only to it and describe a method for eliminating it without replacing parts.

Quite often, on the Shtil MS 180 chainsaw, depressurization of the oil line is observed in the place where the oil line coming from the tank is installed in the saw body. The malfunction can be determined by the characteristic lubricant leaks on the bottom of the tool.

To eliminate the problem, you need to remove the chainsaw handle, remove the hose from the mounting hole, clean and degrease. After all these manipulations, apply sealant to the hose seat and install it into the chainsaw body.

You can learn more about troubleshooting and complete diagnostics of the lubrication system of the Stihl chainsaw by watching a video that shows the step-by-step process of disassembling and repairing the lubrication system.

The danger of using counterfeit oil

The performance properties of cheaper counterfeit oils are inferior in basic parameters to branded products.
The problem is that, relying on the supposed quality of the product, users operate their chainsaw equipment at full load. The use of surrogate oils initiates accelerated wear of the material part, in some cases it is the basis for the cancellation of factory warranties by service departments.

In order to eliminate the risks of purchasing counterfeit goods, it is best to purchase consumables from branded and licensed retail outlets.

Tools

To adjust, you will need the following tools: tachometer, screwdrivers, and in rare cases, special keys. Let's look at their purpose, necessity of availability and cost.