How to Troubleshoot a Chain Saw That Keeps Burning Brushes76

Electric chain saws are powerful tools that can make quick work of cutting logs and branches. However, one common problem with electric chain saws is that the brushes can burn out prematurely. This can be frustrating, especially if you're in the middle of a project. If your electric chain saw keeps burning brushes, there are a few things you can do to troubleshoot the problem.

Check the Brushes

The first step is to check the brushes. The brushes are small, carbon blocks that make contact with the commutator, which is a rotating part of the motor. Over time, the brushes will wear down and need to be replaced. If the brushes are worn down too far, they will not make good contact with the commutator and this can cause them to burn out.

To check the brushes, remove the motor cover and inspect the brushes. The brushes should be about 1/4 inch long. If they are shorter than this, they need to be replaced.

Clean the Commutator

If the brushes are not worn down, the next step is to clean the commutator. The commutator can become dirty over time, which can also cause the brushes to burn out. To clean the commutator, use a clean cloth and some rubbing alcohol. Gently wipe the commutator until it is clean.

Check the Motor Bearings

If the brushes and commutator are clean, the next step is to check the motor bearings. The motor bearings can wear out over time, which can cause the motor to overheat and burn out the brushes. To check the motor bearings, remove the motor cover and inspect the bearings. The bearings should be smooth and free of any play.

Check the Wiring

The last step is to check the wiring. The wiring can become damaged over time, which can cause the motor to overheat and burn out the brushes. To check the wiring, inspect the wires for any damage. If you find any damaged wires, replace them.

Conclusion

If you have tried all of the above troubleshooting steps and your electric chain saw still keeps burning brushes, you may need to take it to a qualified repair technician. The technician will be able to diagnose the problem and repair the chain saw.

2025-01-06

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