Molly Ayala
If the chain on your electric chainsaw has come off, it may be due to several reasons. A common cause is a loose chain, which can be dangerous and cause the chain to release from the guide bar. Other reasons include a damaged chain, a worn bar with shallow rails, or a broken tensioner. To fix a loose chain, you must first remove the chain cover and tensioner to inspect the tension gear and screw. If the tensioner is broken, it will need to be replaced. When reinstalling the chain, ensure it is facing the right direction, with the teeth facing away from you. Adjust the tension screw to achieve the desired tension, and make sure the chain spins freely. If the chain is damaged, it may need to be replaced, but minor damage can sometimes be repaired with a flat file. Additionally, it is important to keep the bar and chain well-maintained and properly lubricated to prevent overheating and expansion, which can also cause the chain to come off.
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What You'll Learn
How to tighten a loose chain
To tighten a loose chain on an electric chainsaw, follow these steps:
Firstly, ensure you are wearing protective gloves and have cleared a safe area to work in. Before attempting to tighten the chain, it is important to clean any debris from the bar and saw. Use a paintbrush to brush off any sawdust or remaining pieces of wood. Check the chain for any damage, such as broken teeth, and ensure that it is not overly worn or stretched. If the chain is damaged or worn, it may need to be replaced.
Next, locate the tensioning screw on the inside of the guide bar. Using a wrench, loosen the tensioning screw to relieve tension on the bar. The exact amount of tension required will depend on your specific chainsaw model, but generally, the chain should not be able to be pulled more than half an inch off the bar. Adjust the tension until the chain spins freely when pulled.
Once the desired tension is achieved, tighten the screws and nuts by hand. Check the chain tension again before using the wrench to fully tighten the screws and nuts. Start the chainsaw and rev it a few times, then turn it off and test the tension again. If the chain has loosened, you will need to readjust and tighten the nuts once more.
It is important to regularly check the tension of your chainsaw chain, especially when the chain is new, as chains tend to stretch with use. Additionally, proper lubrication of the chain and bar is crucial to prevent overheating and expansion, which can cause the chain to loosen.
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How to clean a chain
To ensure your electric chainsaw is operating efficiently and to prolong the life of the chain and guide bar, regular cleaning and maintenance are essential. Here is a step-by-step guide on how to clean the chain of your electric chainsaw:
Before beginning, ensure the chainsaw is switched off and unplugged, and put on protective gear, including gloves and safety goggles. Start by placing the chainsaw on a flat, stable surface with the guide bar facing you. Use a scrench (a combination of a screwdriver and a wrench) or a small screwdriver to loosen the side cover screws and remove the side cover plate. This will expose the sprocket and the chain.
With the side cover removed, use a small brush, such as a paintbrush or a dedicated chainsaw cleaning brush, to gently brush away any wood chips, sawdust, or debris from the chain and guide bar. Pay close attention to the areas around the sprocket and the drive links of the chain. You can also use compressed air to blow away any remaining debris, ensuring you direct the air away from your body and face.
Once the majority of debris has been removed, it's time to clean the chain's grooves and teeth. Use a small, narrow-bladed screwdriver or a specialized groove cleaner to carefully dislodge any packed-in dirt or debris from the chain's grooves and around the teeth. Be careful not to damage the oiler holes or the chain components. After cleaning, inspect the chain for any signs of damage, including bent or broken teeth, cracked links, or excessive wear. If any damage is apparent, it may be necessary to replace the chain for safe and efficient operation.
Finally, before reassembling, lubricate the chain with a high-quality chainsaw bar and chain oil. This will help keep the chain running smoothly and reduce friction and wear. Follow the manufacturer's instructions for proper lubrication points and oil types. Reinstall the side cover, ensuring the screws are tightened securely, and you're ready for your next cutting task. Regular cleaning and maintenance of your electric chainsaw's chain will ensure optimal performance and a longer lifespan for your tool.
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How to replace a chain
To replace a chain on an electric chainsaw, you will need a clear area to work in, protective gloves, and a 1/2-inch chainsaw wrench or a flat-head screwdriver and a socket wrench.
First, ensure that the chain is not too hot to handle. If it is, wait for it to cool down. Next, remove the chain cover, chain, and bar. Check the bar for any debris and use a paintbrush to brush off any sawdust or remaining pieces of wood. Use the 1/2-inch chainsaw wrench to loosen the two bar nuts. With the slotted end of the wrench, loosen the tension screw below the bar nuts to relieve the tension on the bar. Remove the bar nuts and the plastic housing of the chainsaw. Check the chain to make sure it is facing the right direction—the teeth should be facing away from you.
Now, you can remove the old chain. Pull the nose of the chainsaw's bar away from the chainsaw to release it from the tensioner. Pull the drive links out of the guide bar and slip the other end of the chain around the clutch drum. Locate the tensioning screw on the inside of the guide bar and loosen it. Carefully thread your new chain around the clutch drum, ensuring that the drive links engage in the sprocket. Thread the rest of the drive links into the guide bar and around its nose. With the chain properly threaded, put some tension into it by pulling on the nose of the guide bar away from the chainsaw.
The side plate is now ready to go back on. Replace the plate and the nuts that hold it into position, but do not tighten the nuts all the way yet. The guide bar must be allowed to move while the chain is tightened to the correct tension. Use the tensioning screw to adjust the tension on the chain. Insert the screws into the holes and tighten by hand. Check the chain's tension again before tightening the screws with the slotted end of the wrench. If needed, adjust the tension screw some more. The chain should spin freely when it is pulled. Start the chainsaw and rev it a few times. Turn it off and test the tension again. If it stayed tight, you are done. If it loosened, you will need to readjust the tension and re-tighten the nuts.
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How to adjust the tension screw
To adjust the tension screw on your electric chainsaw, you must first locate it. The tension adjustment screw is usually located to the side of the chainsaw guide bar, but it can also sometimes be found between the mounting studs, on the outside of the chainsaw, on the bar cover, or on the engine.
Once you have located the tension screw, you will need to loosen it to adjust the tension. This can be done with a screwdriver or a wrench. Turn the screw counterclockwise to loosen it and give yourself room to adjust the tension.
Next, you will need to adjust the tension on the chain. This can be done by pulling the nose of the guide bar away from the chainsaw, which will tighten the chain. You can then adjust the tension screw until you have the desired tension. It is important to ensure that the chain is not too loose, as this can cause it to come off the guide bar during operation, which is very dangerous.
Once you have adjusted the tension, you can tighten the tension screw to secure the chain in place. Turn the screw clockwise to tighten it. It is important to check that the chain still moves freely around the guide bar after tightening the screw.
Finally, you can reattach any covering or side plates that you removed during the process, ensuring that the bar is snugly and firmly in place. Do not completely tighten the attachment nuts until you have adjusted the tension and checked that the chain is moving freely.
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How to identify a damaged chain
To identify a damaged chain on your electric chainsaw, you should first inspect the bar and chain. Remove the chain cover, chain, and bar. Check that the rails around the perimeter of the bar are clear of debris. If the rails have become shallow due to wear, the bar may need replacing.
Next, check the chain itself. If the chain has broken teeth or does not fit back into the rails, it will likely need to be replaced. Some chains can be repaired with a flat file. Check that the chain fits snugly inside the bar and that the teeth are not worn down. You can also check for damage by grabbing the chain about 4 inches apart and seeing if it moves back and forth. If it does, it is too worn to use.
You can also identify a damaged chain by the number of strokes it takes to cut something. If it cuts to one side, one edge is sharper than the other, and you will need to file the other side.
Finally, you can identify the chain by its markings and measurements. The pitch, or distance between drive lugs, determines whether the chain fits the sprocket. Most consumer chainsaws use a 3/8" pitch. The gauge, or thickness of the drive lugs, is usually 0.050" or 0.058". The length of the chain is determined by counting the number of drive links.
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Frequently asked questions
First, ensure that your workspace is clear and put on protective leather gloves. Next, check that the chain is facing the right direction—the teeth should be facing away from you. Then, clean any debris from the bar and saw. After that, use a 1/2-inch chainsaw wrench to loosen the two bar nuts and the tension screw to relieve the tension on the bar. Remove the bar nuts and the plastic housing of the chainsaw. Finally, secure the chain around the sprocket, aligning it along the grooves in the bar.
There are several reasons why this could be happening. One reason could be that the chain is too loose, so you should ensure that it is properly tightened. Another reason could be that the chain is damaged or worn out. Check for any broken or damaged teeth on the chain and replace it if necessary. It is also important to ensure that the chain is lubricated properly with bar oil to prevent overheating and expansion.
If the chain has worn out to the point where the spacing of the drive links has increased, it may not fit properly into the sprockets. Grab the chain about 4 inches apart and see if it moves back and forth. If it does, it is too worn and needs to be replaced. Additionally, if the bar is worn down and the rails have become shallow, the bar may need to be replaced as well.
