Chain Saw: Chain Falls Off
Check the chain, bar, sprocket, or drum if your chainsaw chain keeps coming off. This is a common symptom and our repair guide will walk you through the installation process to fix your problem. If you need specific repair instructions related to your model, refer to the manual provided by the manufacturer.
Chains
The chain rotates inside the channel of the bar. Over time, when the chain becomes worn, it will stretch and the drive teeth of the chain will wear down, allowing the chain to pop off the bar. At this point, the chain will not stay on the bar, and you will need to replace it.
The chain rotates inside the channel of the bar. Over time, when the chain becomes worn, it will stretch and the drive teeth of the chain will wear down, allowing the chain to pop off the bar. At this point, the chain will not stay on the bar, and you will need to replace it.
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Bars
The bar on your chains supports the chain, and the chain will run along it during rotation. To inspect the bar, first try to wiggle the chain back and forth inside the rail. If the chain wiggles, you will need to replace the bar. If you notice too much movement in the nose wheel bearing, the bar will need to be replaced as well. You will also want to check for wear behind the nose wheel. Occasionally, the bar will only be worn on one side, and in this case, you may be able to simply flip the bar to prevent this symptom. However, if the bar is worn on both sides, it must be replaced. As part of your normal chainsaw maintenance routine, you should make sure that the bar is clean, and you should check it often for signs of wear.
The bar on your chains supports the chain, and the chain will run along it during rotation. To inspect the bar, first try to wiggle the chain back and forth inside the rail. If the chain wiggles, you will need to replace the bar. If you notice too much movement in the nose wheel bearing, the bar will need to be replaced as well. You will also want to check for wear behind the nose wheel. Occasionally, the bar will only be worn on one side, and in this case, you may be able to simply flip the bar to prevent this symptom. However, if the bar is worn on both sides, it must be replaced. As part of your normal chainsaw maintenance routine, you should make sure that the bar is clean, and you should check it often for signs of wear.
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Sprockets
The drive sprocket on your chainsaw drives the chain around the bar. If the sprocket is worn, it can impact the tension on the chain and cause the chain to fall off. If the chain falls off during operation, not only will it be difficult to complete your task, but you will have a safety hazard on your hands. Inspect the sprocket for wear, and if you notice any, be sure to replace it.
The drive sprocket on your chainsaw drives the chain around the bar. If the sprocket is worn, it can impact the tension on the chain and cause the chain to fall off. If the chain falls off during operation, not only will it be difficult to complete your task, but you will have a safety hazard on your hands. Inspect the sprocket for wear, and if you notice any, be sure to replace it.
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Adjuster
The adjustment screw on your chainsaw can be tweaked to provide additional tension to the chain. It can also be loosened to decrease tension. If the chain on your chainsaw is slipping or falling off, tightening the adjustment screw may solve the issue. The adjustment screw can become worn and broken, and in this case, you will not be able to keep tension on the chain. If this is the case, the screw will need to be replaced, and this should solve this symptom.
The adjustment screw on your chainsaw can be tweaked to provide additional tension to the chain. It can also be loosened to decrease tension. If the chain on your chainsaw is slipping or falling off, tightening the adjustment screw may solve the issue. The adjustment screw can become worn and broken, and in this case, you will not be able to keep tension on the chain. If this is the case, the screw will need to be replaced, and this should solve this symptom.
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Retaining Rings
The retaining ring holds the adjustment screw in place. The adjustment screw is very important to your chainsaw, because it is responsible for keeping tension on the chain. If this ring breaks or becomes damaged, it will not hold the screw and tensioner in place. This can cause the chain to fall off your chainsaw. If your retaining ring is damaged or missing, you will need to replace it, to keep your chain on.
The retaining ring holds the adjustment screw in place. The adjustment screw is very important to your chainsaw, because it is responsible for keeping tension on the chain. If this ring breaks or becomes damaged, it will not hold the screw and tensioner in place. This can cause the chain to fall off your chainsaw. If your retaining ring is damaged or missing, you will need to replace it, to keep your chain on.
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