Sterjess Posted April 11, 2019 Report Share Posted April 11, 2019 I recently picked up 2 dewalt dw718 saws. One had a bad bearing in the motor and the other one the handle is broke. Long story short I got one put together from the 2 and the motor will only run in reverse. I saw on another message board that a bad capacitor could do this. I found a wiring diagram for the handle on these and they were both missing. I bought a capacitor for a little larger dewalt motor that's in their grinders as I couldn't find one for this saw. I even called dewalt, first they said my blade is on backwards. I told them no, this is a miter saw. They came back after awhile and said it's on backwards again. I guess dewalts solution is to put a miter saw blade on backwards and have it shoot your material and sawdust back at you. Anyway, they also show no listing in their system for a capacitor in the handle although my wiring diagram obviously shows one. I put the capacitor inline. Still spins backwards, switched the wires, still backwards. I've tried switching around the wires in the handle and no matter how its wired it still spins backwards. Has anyone dealt with a problem like this before? Quote Link to comment Share on other sites More sharing options...
framer Posted April 12, 2019 Report Share Posted April 12, 2019 switch only the brushes wires? Quote Link to comment Share on other sites More sharing options...
Sterjess Posted April 12, 2019 Author Report Share Posted April 12, 2019 Actually I think I figured it out. One motor I got from the guy is a dw717 and the other is a dw718. They look identical in every way. The dw718 is the motor that the bearing went bad on the armature so I've been using the armature out of the 717 for all this testing. Looking up part #s for these motors however I found all the parts are the same except the armature has a different part # for each of them. Now I'm pretty sure the armature for the 717 has the windings wound opposite of the 718 to change rotation. I ordered a new bearing for my other armature now. Should know once it gets here if that's the problem. Quote Link to comment Share on other sites More sharing options...
Jronman Posted April 13, 2019 Report Share Posted April 13, 2019 I have always thought a dual direction circ saw similar to the new m12 (but 6 or 7 in blade) would be nice. Something that a guy could flip over the handle depending on right handed vs left. Quote Link to comment Share on other sites More sharing options...
Sterjess Posted April 14, 2019 Author Report Share Posted April 14, 2019 That was it. So everyone knows dewalt uses armatures wound in opposite directions to change rotation direction. If u have a miter saw that spins opposite of what it should u have the wrong motor or wrong armature in it Quote Link to comment Share on other sites More sharing options...
Trever Posted September 22, 2021 Report Share Posted September 22, 2021 Did you ever come up with a solution for your miter saw? I had the same problem but I can find the correct armature anywhere. Quote Link to comment Share on other sites More sharing options...
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