Why the chain on an electric saw comes off

How to put the chain on the saw?

In order to make it easier to put the chain on the saw, you need to use the setting wheel. Next, put on according to the plan:

  • The surface on which you put the saw should be flat;
  • Remove the sprocket guard from the chainsaw;
  • Turn the sprocket to the right as far as it will go;
  • Put the chain on the clamping piece. Be sure to follow safety precautions so as not to injure yourself while doing so;
  • Put both elements on the sprocket;
  • Reattach the cover;
  • Make sure that the guides are in the right places;
  • Check condition of chain.

When a chain needs to be shortened or stretched

What to do when the chain needs to be shortened or stretched, when links need to be added or removed?

To begin with, let’s understand in which cases it is necessary to shorten the chain, that is, to remove the links from it.

The chain must be shortened:

Accordingly, you can make the chain longer if:

  • A longer bar will be installed on the saw;
  • Some links are so worn that they need to be removed completely, which means the chain will become shorter and need to be lengthened to its former size.

As a rule, remove one or two links. To reduce or increase the size of the chain, you will need these tools:

  • machine to remove rivets. puncher (mechanical device, works on the principle of a press, equipped with tips for squeezing rivets and interchangeable grooves for different chain pitch);
  • Riveting and rolling machine (designed for 1/4″ to 0.404″ pitch chains).

Why the Chain on a Chainsaw Comes Off

How to install the chain on your chainsaw, how to tension it properly and how to check tensioning

If you have a chain saw at home you need to know that it needs special care. It is necessary to occasionally clean and sharpen the chain, clean the air filter, the oil supply and the guide bar. And, of course, you should watch the tensioning of the chain, because if the tension is not good, not only is there a risk not only to harm the saw, but its own health, if the chain at high speed letteth.

Features of the device chainsaw

The heart of the chainsaw is the engine. Most modern devices have a single-cylinder engine. Air-cooled, two-stroke piston system. In these types of engines oil is added directly to the gasoline, and all because the fuel is constantly flushes the crankcase. The oil-to-gasoline ratio varies from 1:20 to 1:50, depending on the chainsaw manufacturer.

The air filter on a chainsaw is just as important. It needs to be cleaned regularly. If the filter is allowed to get very dirty, the dust from it will go straight into the piston system, causing the engine to break down.

If the filter is clogged, the saw loses speed and the engine starts to overheat, which can lead to burning of the piston rings.

The starter on gasoline-powered saws is a rope with a handle, by pulling it you start the engine. When you pull the rope, the cogs catch the ratchet, and the flywheel starts to unwind.

Many people complain that it takes a long time to pull the rope to ignite the engine. It depends on whether the carburetor is set correctly. If the carburetor works with a proper oil-gasoline mix, it shouldn’t be a problem.

The main operating mechanism is the tire and chain.

There are three types of chainrings: drive teeth, cutter teeth, and connecting teeth. They are riveted together. The cutting teeth are on two sides: right and left.

Chains are divided into two types: high-profile and low-profile. Chains are of the chain type with a large clearance, and chains are of the chain type with a smaller clearance. Chains can also vary in shank thickness and link length. The chainsaw chain is attached to the guide bar, which guides it in the right direction. The end of the bar has a specific groove that holds the links and allows the chain to rotate. There is a sprocket in the front of the bar. The chain, along with the guide bar, is called a headset because it is a removable part of the chainsaw.

READ How to Cut Wood with a Chainsaw. How to Saw a Tree in the Right Direction

The petrol saw has an automatic chain lubrication system. The guide bar feeds oil, which then absorbs the sawdust. When saw is idling, oil flow is shut off.

Why does the chain come off, why is it coming off?

If you’re wondering why the chain on your chain saw is coming off, it means there’s something wrong with the mechanism. There are three basic things that can cause this problem: the bar is not working properly, the chain is stretched, and the drive sprocket is loose. Read more about each possible cause.

A problem with the bar

If there is a problem with the bar, the chain tension is almost always loose. This problem is usually found where the tire is mounted.

This is the location in the slot between the outer plate that is on the chain guard and the inner plate that is on the motor housing. The cover is bolted together with the guide bar. This attachment is called the “engine assembly”. The drive sprocket and tire mount are protected by special covers.

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If the fastening screws come loose, the tire starts to move or vibrate. If the bar is good, the tension in the chain should be fine. After tensioning, it will go a minimum of five working days without tensioning. So you need a good tightening of the bolts that hold the bar.

We tighten the chain of a chainsaw. correctly.

How to tension a chainsaw chain correctly

, Seems like nothing difficult, if you know how.

To understand how to tighten the chain on a chainsaw, you first need to find and lower the chain brake. The tensioning screw is next to the bar, it is turned until the chain is tensioned on the bar. Then you pull the chain clockwise. If it doesn’t move, you need to loosen it a little by turning the tensioning screw in the opposite direction.

The chain is stretched

If you have a sagging chain on your chainsaw, it indicates a malfunction in some mechanism, one possibility is the wear of the chain itself.

Over time, the metal deforms and the chain goes to 0.5-1 cm longer. The best way to fix this problem is to buy a new chain, but there is a way to get the old one back to work. Experts say it’s very hard and nearly impossible, but we’ll show you how you can do it at home.

For this we will need:

READ Forward chainsaw Carburetor adjustment

An ordinary chainsaw chain is made of strong steel, so it’s hard to disconnect. You need to disconnect the chain on the inside of the rivet, which serves as a connecting mechanism.

First you need to fix the chain in a vise, and then gradually grind off the protruding part. Grind with a file or file. Do not use an angle grinder, because there is a risk of damaging the side parts of the links. After grinding, the rivets are knocked out with a bead. The rivet that has been driven out should not be thrown away. You may not be able to find a replacement for it. Petrol saw manufacturers do not make separate parts for the chain, because they don’t expect customers to be able to repair the chain themselves. You probably won’t be able to make a new rivet yourself, so you’ll have to install the old one.

To shorten the chain, split it in two places. But remember that the number and spacing of guide lugs on the inside of the chain must match the drive sprocket.

After removing one or more links (depending on how stretched the chain is), the chain can be connected. Join on the old rivets, while pressing them tightly on the sides.

Next we need a welder. The rivet needs to be welded to the sides of the link. After that, use a file to file off the excess that was created when working on the weld. The chain can be considered back in working order.

Drive sprocket not firmly fastened

One possibility for a slack chain on your machine is a problem with the drive sprocket. Most of the time it is because the star is not properly fastened. Now we’ll tell you how to attach the sprocket correctly and then put the chain on the chain saw.

First you need to remove the engine guard. Next, remove the protective cover of the spark plug, pull out the air filter. Then the spark plug is unscrewed with a spark plug wrench. In its place, a special stopper is put, which fixes the piston in a certain position. Using a special wrench (you can use a universal wrench for the angle grinder) turn the clutch disk clockwise until the piston reaches its highest position. When viewed through the spark plug hole, the piston should remain at the bottom. As a stopper you can use a thick rope, it is better to fold it several times. After locking, the drive sprocket can be clamped by turning the clutch disc counterclockwise.

After clamping you need to do everything in the reverse order, i.e. to assemble chainsaw. The chain is put on the tire, it should get on the drive sprocket, which holds it. The bar is put into the special mounting holes and bolted on. Then the cover is put on.

READ Setting up the carburetor on a Partner 350 Chainsaw

How to tension: setting the chain saw cutter

We’ve covered the main reasons for the sagging chain. About how to install the chain on the chainsaw, described in the paragraph above. Now you need to tension the chain correctly and make sure it’s not too tight.

Chain tensioning

There are two ways to tighten it: the fast way and the front way. The best way is to tension it from the front.

If you do the frontal tensioning, you need to unscrew the nuts that hold the bar and lift it over the edge. Use the special bolt on the right hand side to tension the chain until it is at an acceptable tension, and then lift the bar even higher and tighten it.

If using the quick tensioning method, you must first lift the wing nut knob and loosen it. Then turn the chain tightening screw clockwise as far as it will go. Then re-tighten the wing nut and lower the handle.

Check tension

To check chain tension, disengage saw’s brake system. Then manually guide the chain around the bar, if it runs smoothly and doesn’t sag, then it’s okay. If the chain runs very tight, however, you need to loosen it a bit because there is a risk of breaking during operation.

Operating Tips

Knowing how to tighten the chain on a chainsaw is not enough. Take good care of your saw so it’s not just the chain that lasts, but the chain as well. Here are some tips for use:

  • Clean the air filter regularly and lubricate it with oil. If necessary, replace the filter with a new one.
  • Always check that all nuts and bolts are properly tightened before use to prevent the machine from malfunctioning during operation.
  • Lubricate the bearings regularly and don’t forget to clean the spark plug.
  • Lubricate the chain sprocket. And don’t forget to clean your chainsaw after working.
  • Always lubricate, sharpen, and tighten the chain in good time so you won’t have any problems with your bar and chain.

Chain Keeps Falling off Chainsaw. Clean. Fix, Diagnosing

If you use all of the above tips, your machine will last much longer than the warranty period.

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How to choose the right chainsaw oil for your Partner 300 Fifty??

What to prolong the life of the motor and other working devices of the garden tool, you need to use quality engine oil to make the fuel consistency. When it burns in the cylinder, it should produce as little ash as possible, which settles on the walls of the muffler and on the spark plug.

Motor oil, which is used for refueling, should quickly dissolve in gasoline and painstakingly cleanse it of harmful impurities that have deposited over time in the narrow channels of the carburetor Partner saw.

chain, electric, comes

In addition, the oil in your Partner 300 must have excellent lubrication, corrosion-resistance, and wear-resistance properties.

chain, electric, comes

It is best to use STIHL and Husqvarna two-stroke oils for mixing fuel. They perfectly lubricate the working units of garden tools Partner and when burning does not release a huge amount of ash.

Your Partner try hundred and fifty chain saw starts up and shuts down

There can be several reasons for this malfunction. In most cases the engine of the tool starts and immediately forgets through the clogged factory fan, as a result of which the fuel does not enter the engine cylinder in a sufficient amount to work. To repair the damage, you will need to remove and clean the breathing apparatus. If it is damaged, it will need to be replaced.

Another reason. No contact between the spark plug and the wiring cover. It could be due to a mechanical shock or a deposit of carbon on the plug. To repair your Partner three hundred 50 chainsaw, the spark plug will need to be removed and cleaned. In some cases, a real change of plugs may help.

The third cause of malfunction. Powerful clogging of the standard chainsaw muffler. Over time, carbon deposits form on its walls, precluding exhaust from the engine. As a result, gases accumulate inside the motor and prevent proper operation. To repair the damage you need to remove the muffler and clean it with compressed air. You will need to disassemble the motor and purge its cylinder.

The chainsaw Partner three hundred and fifty starts and stops

There can be several reasons for this malfunction. In most cases the tool engine starts and immediately forgets through the clogged factory fan, resulting in not getting enough fuel into the engine cylinder to work. To repair the damage, you will need to remove and clean the breathing apparatus. If it is damaged, it will need to be replaced.

Another reason. No contact of the spark plug with the wiring cover. This could be due to mechanical shock or carbon deposits on the plug. To repair the chainsaw Partner three hundred 50 spark plug will need to be removed and cleaned. In some cases, a real spark plug change may help.

The 3rd failure reason. Powerful clogging of the standard chain saw’s muffler. Carbon deposits form on its walls over time and cause exhaust from the engine. Gases accumulate inside the engine and prevent proper operation. To repair the damage, you will need to remove the muffler and clean it with compressed air. You need to disassemble the engine and blow out the cylinder.

READ How to Make a Parallel Stop for a Circular Saw

In terms of importance, the chain is often put by experts on a par with the saw’s electric motor. Therefore, if you want to choose the right saw element, you should approach it with special care. To choose a chain for your power saw, you should pay attention to the following parameters:

  • Compatibility with electric saw In other words, you should choose the part that was released by the manufacturer of the tool. In this case the risk of making a mistake and buying the wrong sawing element is reduced to zero;
  • Defining the chain’s tasks If you are looking for a high-performance saw blade, choose a 3/8-inch piece. If the electric saw is only used for simple household tasks, then the best option is to buy a saw element with a chain pitch of 0.325 inch;
  • Sharpening angle This parameter is important for further repair, maintenance and restoration of the saw element. Chains with a sharpening angle are more efficient and handle heavy loads better. However, for the purpose of complex woodworking if it’s frozen or wet, you should settle for a chain with a sharpening angle of ten ;
  • The length of the saw element should match the length of the saw blade. Even if the chain is stretching and sagging over time, you can solve the problem by removing a few links.

In addition to these settings, you need to consider the type of cutting and the material that can be cut. Always keep in mind that a chain with a small sharpening angle is optimal for slashing purposes. The performance of the chain will be slightly lower, but the chain will last longer.

Necessary tools and equipment for tightening a chain on a chainsaw

In order to tension properly, some basic knowledge and simple tools are necessary. With STIHL chain saws, tensioning is easy with a built-in chain tensioner. This method is as simple as possible and is very quick to tighten. To tension or adjust the degree of slack in the chain, the manufacturer recommends doing the following

  • With the help of a wing nut unscrew the sprocket cover;
  • rotating the adjusting wheel determines the required chain length, tensioning it to the required degree;
  • sprocket cover is closed again and the chain is fixed firmly on the bar.

If it is impossible to tension the chain of a chainsaw with a built-in mechanism, use such tools (by the example of an electric saw Sparky):

  • angle grinder with metal disc;
  • hex wrench, diameter 5 mm;
  • A piece of wire;
  • A wooden stick or a strong wood splinter;
  • flat screwdriver.

After de-energizing the electric saw unscrew the screws with an allen key, remove the housing cover, unscrew the tensioning screw with a screwdriver and remove the stem nut. The side of the screw adjacent to the body of the saw is ground with a disc. Then assemble the saw in the reverse order. A chisel wrench is needed to clean sawdust from the body.

How to tension the chain on a chainsaw correctly:

chain tensioning principle

The principle of tensioning the chain is as follows:

  • Use the standard wrench included with the chainsaw to loosen the nuts on the cover;
  • then the screwdriver is inserted into the special slot, rotary movements are made and the chain is tightened;
  • the wrench must be turned slowly and carefully. after a couple of turns, the degree of tension is checked by hand, then, if necessary, several turns are made again;
  • when the chain is tightened enough, put the cap back on.
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How to check chainsaw chain tension

To check if the chain is tensioned properly and needs tightening, pay attention to the following indicators:

  • if it is tensioned correctly, the cutting quality is good, the guide bar sinks quickly into the material, cuts easily and without binding in the wood;
  • The tire does not get hot when working;
  • Both fine and coarse chips are produced during sawing.

Chain needs tightening if:

  • the bar gets very hot;
  • sawing quality is reduced, the cutting edge is uneven;
  • fuel and oil consumption increases;
  • Only fine chips are formed.

STIHL MS 271 chain saw

The chain on the electric saw is loose

The drive chain sprocket or chain saw is one of the most important parts of the saw. The main function of the chainsaw sprocket is to transmit engine torque to the dust chain. This transmission is through a centrifugal clutch. The type of sprocket can be divided into professional and household sprockets, and chain sprockets. The drive sprocket, like the chain, gradually wears out as the chainsaw runs and saws.

How to Fix a Slipped Chainsaw Chain

Let’s learn more about why you need to replace a worn sprocket or chain saw and when to change it.

The main signs that the sprocket needs to be changed:

Chainsaw Troubleshooting: How to Keep The Chain From Coming Off The Bar | eReplacementParts.com

  • the chain has been replaced twice with a chainsaw (one of the rules of chainsaws and power saws is that the drive sprocket must be replaced if the tool is used frequently and actively after two chain changes);
  • the quality of cutting has deteriorated, the chain is pulling more frequently;
  • you installed a new chain that does not fit the old drive sprocket (this part is not universal and also has its own pitch, in addition, the steps of the drive sprocket and the driven sprocket must match, otherwise the tool will not work);
  • You are using a different bus, a shorter or longer one.

Why change the sprocket?

Remove the worn sprocket for the following reasons:

  • With an old sprocket, the dust chain will stretch very quickly. After several uses, the chain will freeze and tensioning will not help;
  • if you put the new chain on the old sprocket, the smoothness of the chain will decrease, the cutting quality will deteriorate, and the chain will run to the side when cutting;
  • the overall wear on the chainsaw will accelerate, the tool could fail at any time;
  • The chain can break or the chain can jam during operation (risk of injury to hands and damage to the body of the saw or chainsaw);
  • the tire heats up faster, causing the chainsaw to overheat faster;
  • The load on the motor and housing will increase.

Important! Do not change sprocket size during repair, use manufacturer’s standard. Unauthorized substitutions will affect the performance of the chainsaw or electric saw.

Are there ways to extend the life of an existing star?

The main ways to extend the life of a chain saw sprocket are:

  • Use more than one chain (preferably three). This method is the gentlest and most convenient for the chainsaw owner in that you do not have to continually tighten the chain as you work hard. The operation of the three chains, in turn, will save the life of the sprocket and delay its replacement;
  • quality sprocket bearing service. This role plays an important role in the operation of the sprocket and the engine. Special grease is recommended for lubrication. The sprocket bearing is not always activated, but only when idling, so it requires periodic lubrication. You can use a tire lubricant, such as standard Repsol or Husqvarna.

What tools do you need to replace the sprocket?

To replace the chainwheel, you need the following tools and accessories:

  • A special wrench to remove this item (usually supplied with expensive brand-name chainsaws; cheaper saws are not equipped with this wrench);
  • aluminum or copper skid (only soft metal and only if there is no wrench);
  • hammer (for striking while unscrewing the sprocket);
  • flat screwdriver to tighten the nut;
  • Bearing grease.

Construction problems, differences between different models

Brand name chainsaws have a special design that makes it impossible to replace a worn drive without removing the clutch and other parts of the chainsaw. That is, the duster must be almost completely disassembled. modern models of expensive chainsaws are always equipped with a special wrench.

The chainsaw owner may also encounter this nuance: on imported Chinese chainsaws or electric saws, the sprocket on the clutch mechanism may be unusual. On older models, if the chain teeth are worn, it is necessary to unscrew and replace the drive unit. On newer models, the sprocket can be replaced separately.

Algorithm of a self-replacing clutch sprocket

How to replace the sprocket with an electric saw or chainsaw. find out more about this.

The sprocket replacement procedure is as follows:

  • remove the brake chain cover and pull it toward you (avoid contact between the brake pad and the clutch parts);
  • Use a wrench to loosen the nuts holding the chain and chainsaw cover;
  • remove the chain and then the bar, removing debris and filings from the mounting holes;
  • we secure the piston in the cylinder with a regular cord, but we use a piston plug or a special clamp when possible;
  • The clutch begins to rotate and turns until the piston touches the socket;
  • then the plug or cord is lowered into the spark plug hole and secured there, tying several knots together (the plug will be secured by itself);
  • unscrew the clutch nut (note. the threads of this nut remain; pay attention to this when unscrewing);
  • should not use hard tools to break the soft metal clutch nuts;
  • then the coupling is removed;
  • After they remove the gear itself;
  • Replace the old sprocket with the new one;
  • Reassembly.
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