DeWalt Miter Saw - DW704 & DW705 Armature Replacement (Part # 5140021-93)

https://www.mmtoolparts.com shows you how to replace the armature and fan in a DW704 or DW705 DeWalt Miter Saw. This armature is sold in a kit along with a bearing and replacement motor housing. If your saw is experiencing no power, a loss of power, or if you see sparks/smoke inside the motor housing...it's probably a good idea to inspect your armature for replacement. 

Armature Kit for DW704 & DW705 types 4A-7:

https://www.mmtoolparts.com/store/dewalt-armature-kit-5140021-93

INTRO: On this episode of DeWalt Miter Saw Repairs we’ll be replacing the armature in a DW704 or 705.

                While the process for replacing the armature should be similar for all DeWalt Miter Saws, you’ll want to look on top of the motor housing here to verify you order the correct parts for your model and type #.

                First, we’ll talk about some symptoms of armature failure, then I’ll open up this 705 behind me and walk you thru a replacement.

DIAGNOSE: Are you seeing sparks or smoke come out of the motor housing? That’s…not supposed to happen. Or maybe your saw isn’t running at all?

                Loss of power, no power, sparks, smoke or a burning smell are all indicators that your armature is ready for replacement.

                There’s a chance that it could just be your carbon brushes. But usually an issue with brushes is caused by the armature in the first place, so we recommend replacing those together. For more information on diagnosing bad brushes, refer to our video titled “DeWalt Miter Saw – How and When to Replace Brushes.”

HOW-TO: Swapping out the armature can seem complicated, but after I show you how you won’t have any problem doing this yourself. If you think you’re up for the challenge, grab your tools and follow me.

                The armature for these models comes as a kit which includes a new motor housing, armature bearing and the armature.