Question about Makita 3 x 24" Belt Sander
I've had this sander for years and it has been very reliable.Now though it just wont start.'m wonderng if the electrical bushes heve worn out and how to replace them.
The brushes are easy to check and replace. You will see a small disc to the right of the handle on teh motor body, and another on the front side. These are your brush caps. Simply unscrew them and you will see the brushes. They could just be stuck with sawdust so pull them out gently and check the length. Most makita brushes have a wear line that indicates when you need to change them, but generally if the holders are clear and teh brushes are tou ching the motor, the brass head should stick out a few mm before the caps go back on and this should be enough to give you time to get a new set in ready. The brushes will only fit in the holders one way.
Posted on Oct 25, 2008
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It sounds to me that you have used the sander a lot and the vibration has broken a wire or it's about to break on the field windings. The brushes you need to look at to see if worn. But I kind of think wire problem. I had this happen on mine and opened it up to find this is what happened. The sander would be turned on and would not operate until I turn upside down and it would work. This is great if you are sanding upside down but this is just a sign that you are on borrowed time as this will eventually not turn on at all. I was able to fix mine with new wire crimp connection and solder with heat shrink material. If not you can order new field winding if this is what is wrong. Cleaning up the sander won't hurt either. You might want to see what a new sander will cost vs. part. Good Luck!
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