Question about Porter Cable 371K Electric Sanders & Polishers

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Porter cable polisher5 7424 only works at max speed

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It could be that the variable speed module is malfunctioning. If it is the part number is 886978 and lists for 12.27. I would check for a buildup of polishing pad inside the handle area and clean thoroughly before ordering any parts. You can view a breakdown at Dewaltservicenet.com

Posted on Oct 10, 2009

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Posted on Jan 02, 2017

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Where can I get a wiring diagram for a Porter Cable20volt battery


images for Porter Cable20volt battery wiring

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Porter cable


DO NOT leave it that way - that fuse is for YOUR protection, and the protection of your family and neighbors.

That humming is probably an byproduct of the speed control, not too much to worry about. The vibration should go away almost entirely when you reset the wheels to run true and dress them to balance.

The capacitor is your starting capacitor - its voltage rating is completely unimportant - that's a max voltage rating, and they only wanted to stock one capacitor, not have one for the 120V versions and a second one for the 240V versions.

Did you by chance start working on this grinder while it was still under warranty?

If the wheels turn freely when the power's off, and if the grinder doesn't get awfully warm when it's in use, then I'd think that the problem is within the speed control board.

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Connect a voltage meter to the 115v plug and measure voltage. If too high, adjust governor spring tension to compensate. Your engine developes max horsepower at about 3600 rpm. At this speed the generator should be producting 115v at 60 cycles. Good holidays

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Hello. Yes it could be the extension cord or the outlet your pluged into or the feed speed of the cut.Try slowing the forward feed speed.
builderdale

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check for a broken driver blade, also make sure of the proper nail guage for the tool. Let me know if this is not the case and I will find you a breakdown for the tool for further inspection.

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1 Answer

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You would need to replace the switch, give me a model number and a location with zip code and I will try and find one locally for you, Its not that hard

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