Question about Dewalt Dc385 Reciprocating Saw 18v Tool Only
The armature comuttator can be bad on some collectors and even broken you can hear it if you have a short period for the first time hearing a shrill sound then its also eating brushes and much whistling sound until it become hot control the sliding contacts on the purple and brown wires to the brushes and after that it should only make a buzz sound and has no power give not allways the batteries the blame in most causes like the brands MILWAUKEE and PANASONIC have some brushmotors they have allways the cause of problems EY7441 last a little time of 2 years It is almost a short circuit and then the collectors eating the carbon brushes in a few weeks and make a loud piercing sound, bad for the batteries Milwaukee has the same type of brush engines Johnson when there are people who think the batteries are bad ALLWAYS replace the armature if you hear a shrill sound and the machine become hot believe it in 80 % it is the problem new brushes are eaten again in a few weeks even Makita and Dewalt but not so much as the type of Johnson armatures buying new batteries shall not help much more but you can hear simply the difference and the rpm is much better and again much more powerfull AND MUCH CHEAPER look the difference of the 2 armatures left the older less powerfull armature and on the right the later modificating armature as Panasonic and Milwaukee having with much more power new development but MUCH MORE HEAT DISSIPATION and a very short lasting time if its to much charged then its sounds terrible replace it and your batteries are happy. .
Posted on Sep 16, 2016
There are very few things that will cause this - the most common problem is the trigger assembly - it could also be a bad connector or worn brushes, but as I said, most common is the trigger switch.
Posted on Jun 30, 2014
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Posted on Jan 02, 2017
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