Question about Porter Cable 3" x 21" Electronic Variable Speed Sander

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Burt out sander.

My sander overheated and stopped working. I cleaned it up and found it to be clogged with sawdust which led to overheating the motor. When this happens what generally needs replacement. There are plenty of parts for the 352vs, just need some guidance. Thanks!

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I would start with the carbon brushes they are easy to replace and you should be able to pick them up at any lowes or home depot

Posted on Dec 04, 2008

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Ryobi BE318-2 dust bag don't work


The pathway that the dust follows to reach the bag is most likely clogged. Take the bag off and look inside to see if there's sawdust plugging the orifice. If there is then you could vacuum out the dust or simply start up the sander and let the machine clear itself. If you do the latter just know that you will create a cloud of dust so do it in the proper environment.

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This usually occurs if the motor is overheating and the internal circuit breaker is tripping. After it cools down, it self resets. This can be caused by bad bearings or parts dragging the motor down, making it work hard enough to over heat and trip the breaker. If you are running it on an extension cord or circuit that isn't able to provide it with the amps it needs the motor will overheat and trip the breaker also.

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Sawdust is not going into the dust bag, could the sander be clogged?


that would be my first guess, also look for pieces of sanding belt that might have clogged the passageway

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1 Answer

The sawdust is not going to the bag. I've completely blown my sander with air and tried to unclog anything without taking the sander apart, but still all sawdust stays on the belt and not going up the...


The dust bags on most sanders are only marginally effective. They work OK on random orbit sanders with the holes in the sanding pad, but are next to useless on belt sanders. You might try attaching a vacuum cleaner hose instead of the bag. On the other hand, if the the belt is clogging up, that's not going to be helped by attaching a vacuum hose. The belt is "loading" up probably because the material you are sanding is damp, or maybe you are sanding paint, which tends to melt then stick to the belt. If you are just trying to keep the belt from clogging (or unclogging it), rather than keeping the dust contained, try running the belt against a wire brush after every couple of minutes. Good luck, Al K

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1 Answer

I have a Porter Cable 503 belt sander that heats up to the point that I can't touch it and have to stop using it to let it cool. I have been using this model for years, have relied on it exclusively, and...


I have a black and decker BR300 that I've had the same problem with.I don't know if yours is caused by the same things but what I found was that the vacumn system on mine was not sealed up good enough and too much dust was getting around motor cooling fins. Unfortunatly on mine by the time I figured this out it had frayed the drive belt which caused some small strands to wrap around drive gears and mostly trashed the motor. Hope this is of some help to you. Thanks

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1 Answer

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Remove the dust bag and unplug sander for now. Everywhere you see an access hole (fan area, dust port, back of sander blow thru the tool to remove lodged dust that clogged the system, Also look for broken belt pieces in the back of sander. Then while running (remove belt) blow again thru all the ports to try and reomve as much contamination as possible. When finished you can feel to see if air coming from dust bag port, it not you still have a clog that might need more work. If I have clarified your request would you please rate this response accordingly and thank you.

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1 Answer

Stopped working might have overheated it does nothing now


have you checked the fuse first.
possibly worn brushes on the motor, remove the brushes and check the length of them , also look to see if they are pitted or burned.

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1 Answer

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Try blowing through the little **** that collects sawdust (inside back by belt) with a compressed air nozzle, with the bag off, and squeeze the trigger and let the motor run a little. Blow out the insides as well as you can, including the air intakes for the cooling of the motor, and it should work fine again.
You can also blow out the bag to clean the pore in the fabric.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread. If I've managed to answer your question or solve a problem, please take a moment to kindly rate this post....thanks!



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the drive shaft is probably going bad. If all the greese is gone then it will cause it to heat up. you can find parts and diagrams to fix it at www.deltaportercable.com. search for modle number 7800 under the parts section.

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