How To Replace Armature and Brushes in a DCD785 Dewalt drill

a video tutorial showing full strip down and repair of a Dewalt DCD785 Drill. Full motor overhaul armature and brushes installation with description of process and parts.
can you fix a Dewalt Drill? if I can so can you. #dewalt #repair

[@qedelec]

When my tools were stolen a good friend gave me this drill which was faulty but allowed me to work until I could buy new. It’s sat in my garage gathering dust, thinking the field winding and the armature would be too expensive to replace.
My surprise was there was a permanent magnet for the field.
@ £35 for an armature, I’ll be replacing it, hopefully the gearbox won’t present too many damaged parts when I strip it down.
We often get similar items at our local Repair Café. I urge you to volunteer, we need more people to stop items going to land fill.

[@markanderson5342]

Nice video! Hello from Michigan, US!

[@doctorlefthandthread]

Hello there Mark thanks for your comment

[@BadYossa]

Cheers for posting this. Exactly what I needed to find out. 👍

[@doctorlefthandthread]

Thanks for the comment they all help

[@nigeld9297]

Thanks for the video. I hope it will help me when changing the brushes. Just a thought though. When you dismantled you remove gear box whilst the armature was left in place. When you reassembled you mated the armature to the gearbox before seating the gearbox. I believe you did this to align the two by moving the armature. Couldn't you have reseated the armature and then twisted the chuck to align the armature splines?
Good video so thanks for giving me the inspiration to have a go.

[@doctorlefthandthread]

I probably could have done that but have never done it that way before

[@nigeld9297]

I
Thanks for replying so quickly. I tried to do it that way myself a shortwhile ago. One thing I hadn't realised, these are very torque motors (60Nm), try as I might there is no way of turning that gearbox over without some other mechanical intervention! It certainly made appreciate what a small motor and gearbox can produce! @@doctorlefthandthread

[@hugobose2254]

I've got the same Drill, Where did you get the spares from? Great Vid btw

[@doctorlefthandthread]

Depends where you are sometimes they are available on ebay but not always. If you look up authorised Dewalt repair centres in your area they might sell them to you. Thanks for your comment 👍