How to Dress a Chain on a Saw
How to tighten the chainsaw chain? We answer!
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If you look closely at the work of a professional logger who spends almost all his working time with a chainsaw in the forest, we will see that he will never start the saw and start working until it checks the chain tension and the sharpness of the teeth. All this is very important for productive work.
Saw chain tension. This is a very important factor. A chain that is loosely stretched will hang and may come off the saw bar or even burst. Padding is also bad. This means quick wear and tear on the saw motor. In addition, the design of almost all saws is such that the chain tension also fixes the tire, and in the free state, the guide bar of the chainsaw freely moves left and right.
To check the chain tension, you just need to take the chain of the saw by the tooth and pull it up at the top of the tire, approximately in the middle or slightly closer to the tip. With proper tension, approximately a third of the shank remains in the groove of the saw bar. If more. the chain of the saw is tightened, but less. not long enough. In this case, the saw chain itself must rotate freely by hand.
The chain tension is not very difficult, you only need to learn the sequence of this procedure and regularly perform it.
For your safety, make sure that the saw is turned off and cannot accidentally start. Turn the chain a little by hand, preferably in a special protective glove, along its working stroke. If the chain is stretched, then the sag at the bottom of the tire will immediately become noticeable. It is from the bottom sag that the degree of chain tension is determined.
First you need to pay attention to the chain tensioner, which is located on the right side, inside the side cover that secures the tire and where the clutch with the brake is located. In most saws, the tensioner looks like a regular bolt, but there are also saws with a toolless chain tensioning system.
Lateral chain tension Toolless chain tension
Then it is necessary to loosen the side nuts securing the tire and with the adjusting screw pull the tire forward, choosing the slack. Do not forget to often rotate the chain along the guide rail in its working direction, this will help to choose the articulated backlash of the chain and control the smoothness of its travel.
After completing all adjustments, tighten the lock nuts. With proper adjustment, the chain moves evenly, without snacks and with little inertia. A small margin when pulling should remain in the upper part of the tire. If the chain is overtightened, then it rotates with difficulty and instantly stops when you remove your effort. The constriction of the chain is much more destructive than slack, so it is better to carry out this adjustment more often than to adjust the saw for future chain stretching.
Under no circumstances should the hot chain be changed or adjusted. When cooled, it shrinks and can irreversibly deform the guide rail or damage the engine. Allow the chains to cool completely and only then stretch.
Timely care of the saw set is the key to the longevity and reliability of all types of chain saws. Having picked up the chain, a specialist in this field is able to tell in what conditions it was operated. Strong wear of the working surfaces of all links. the chain is tightened, blunt and shiny the back surface of the tooth. too loose, etc.
Modern saw models are already equipped with automatic chain lifting, but only your attitude to the tool, and in particular to the sharpness of the saw and its tension, are able to give pleasure from the sawing process, rather than repair the unit in extreme conditions.
Advice from Stihl. Tension the chain correctly!
How to tension the chain correctly?
Most Stihl chainsaws are equipped with a side chain tensioning screw that can be adjusted instantly. To do this, turn off the engine of the chainsaw and loosen the screws that secure the side cover, see Fig. 1.
Take a screwdriver and turn the tension screw to pull the chain, while slightly pulling and pulling the chain along the saw bar; at the same time, care must be taken not to injure the hand on sharp teeth, so this operation is best done with gloves, see. 4.
A correctly tensioned chain must not sag at the bottom of the tire, see fig. 3, but at the same time while pulling it, you should not exert too much effort.
Some Stihl chain saws are equipped with a quick tool-less chain tensioner, see fig. 2. In order to tighten the chain, it is enough to manually unscrew the large special thumb screw, thereby releasing the side cover and turning the black wheel by hand to achieve the correct chain tension. Then you should tighten the side cover of the drive sprocket again with a special screw by hand and the saw set will automatically self-install for operation.
Before installing a new chain, be sure to clean the groove ("groove") of the saw bar from dirt. Accumulation of dirt in the groove interferes with the lubrication process of both the chain and the entire saw set, so the “uncleaned” tire and chain become very hot during operation. An ideal tool for cleaning grooves is an ordinary screwdriver or other suitable tool.
Видео: How to Dress a Chain on a Saw
Important! Perform chain tensioning operation when it is cold and never adjust the warm or hot chain! Excessive tension, when the chain cools down and shrinks, can cause serious problems with the saw bar and headset. Therefore, you should even slightly weaken the chain before starting work, for example, during drizzle.
According to the official website of the manufacturer www.stihl.com
Social advertising # 8212; safety precautions for working with
The history of the chainsaw
Proper operation of the chainsaw!
In our article, we will talk about what a person should know when using a chainsaw. In addition, we will explain why he should know this.
A chainsaw is a dangerous tool, you need to use it very carefully. Before the first start, carefully read the operating instructions.
It is necessary to clean the saw every time after working under the cover of the sprocket from sawdust with oil, and also to wipe the inner surface of the cover. Otherwise, the sawdust may be compressed and it will be difficult to tear them off.
Replacing chains, sprockets and tires
For uniform wear on the sprocket and tire chains, we recommend having two chains in stock. With proper handling, the sprocket is designed to operate with two chains, after which it is necessary to replace the sprocket and both chains.
During operation, the chain forms a development on the leading sprocket, due to which the step on the sprocket increases, and therefore the chain is gradually extended to the step of the existing one on the sprocket. If you put a completely new chain on an old sprocket, the chain stretches in a jump, which may even cause it to break.
A simple rule: 4 = 2 = 1. on average, one sprocket has two sprockets and four chains.
Proper chain tension
You must in no case allow chain slack. To check if you have pulled the chain, jerk it with your gloved hand or napkin. With proper tension, the chain will move with little effort.
If during operation you notice that the chain is slack (in case of heating), stop the chainsaw and tighten the chain. After work, be sure to loosen the tension! The chain will begin to cool and pull on the tire, if it is too stretched, it may break.
Proper handling of the saw bar
For uniform tire wear, it is necessary to turn it over, as well as change chains (provided that there are 2 chains!).
After work, it is necessary to clean the tire:
- Groove cleaning
- Cleaning the oil holes
- The upper edges of the tire from burrs with a file.
The air filter must not be washed in gasoline or acetone, as this may lead to its integrity. The filter must be cleaned if power loss is noticeable during saw operation. If damage appears on it, it should be replaced. Therefore, it makes sense to purchase an additional air filter in reserve when buying a chainsaw.
It is best to use the original oil for your chainsaw. It is designed specifically for use with tools of its own brand and will not cause any damage to internal components. Using it is absolutely safe.
The oil tank should not be completely emptied, as this can adversely affect the tire and chain.
We draw your attention to the fact that gasoline or already mixed fuel should not be stored in inappropriate plastic containers! Fuel can be stored in special fuel cans (for example, husqvarna has special cans: Green canister for gasoline, 6 liters. Canister for gasoline, orange. Combined canister). Gasoline is an aggressive environment, and if the plastic of which the container is made is not intended for its storage, then gasoline begins to corrode it. The smallest particles of dissolved plastic are passed through the fuel filter and enter the carburetor, clogging the nozzles. A carburetor that is clogged with plastic cannot be repaired.
The diluted fuel mixture can be stored no more than a month (the instructions for your saw indicate 3 months, but this corresponds to the European quality of gasoline). As practice shows. 1 month. the optimal shelf life for domestic gasoline in the absence of direct sunlight on the fuel tank and temperature difference.
Before storing the chainsaw for a long time, the fuel must be drained and the tool idled to burn off the remaining fuel in the tank.
Why should this be done?
During storage, gasoline evaporates from the carburetor, and oil remains in it. The membrane, which in the carburetor is responsible for pumping fuel, sticks, which makes the saw difficult to start.
How to sharpen a saw chain?
In the event that you are going to sharpen the chain indoors, then clamp the tire in a vice (it will not damage the tire). If you do not have a vice, you can get a clamp.
If the number of links on the chain is not divisible by 4, then it is better to start sharpening the chain with two links in a row, otherwise you will have to count the sharpened teeth).
Choose a tooth that is bent away from you. The holder must be installed at right angles to the tire. Risk 30 should be parallel to the bus. Make two or three movements away from yourself with a file. In this way, grind through one cutting tooth, then turn the saw over and sharpen the second part. For uniform wear of the file, do not forget to rotate it periodically and clean it of chips. The chain pitch and diameter of a suitable file are indicated on the holder. Do not forget to make sure that the notch of the file does not run into the mounts, otherwise it will simply grind them.
Do not let the saw run at part speed or idle! Do not work on half-gas or gas!
The fact is that when working at partial speeds or at idle, the fuel mixture is not completely consumed, coke is formed on the rings, piston, exhaust window. When there is a lot of coke on the exhaust, its piece breaks off and falls into the piston group.
- Do not use plastic containers to store fuel!
- Do not leave the machine idling!
- Work only at full speed!