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DeWalt DC725 cordless drill sparking - brushes?

Discussion in 'Tools and Materials' started by elcaro, 1 Feb 2019.

  1. elcaro

    elcaro

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    Hi chaps, I just got a new battery for this drill / driver, as per
    https://www.diynot.com/diy/threads/cordless-drill-driver-battery.516212/

    Now the drill is sparking like mad, not while running but when you let go the trigger and it stops then there's a clatter and big sparks.

    Is it worth trying to replace the brushes do you think? I'm not sure cos with my experience with a lawn mower recently I sort of got drawn into "replace this, only £20", uh-oh, "replace that only a tenner" ... and so on till I had the sense to take it to the tip ;)

    I read somewhere - maybe on here - that putting the drill back together after replacing the brushes was a "nightmare" :( and I don't need any nightmares right now.

    Also any ideas for a new one?

    Regards from Terry.
     
  2. Take the brushes out first and if there's plenty meat left there's a stronger chance the armature is knackered.
     
  3. elcaro

    elcaro

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    Ah thanks Sammy - and if it's the armature what does that mean - game over for that drill?
    - Terry.
     
  4. big-all

    big-all

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    sounds like the electric brake so normal ?
    if you put it in 1st gear and realese the trigger slowly what happens ??
     
  5. elcaro

    elcaro

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    Ah that's the slider on top with "1" and "2" on it right? Not sure I've ever used that!
    Anyway, with it set to "1" if I rev it up then release slowly looks like nothing happens - no spark.
     
  6. big-all

    big-all

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    probably normal electric brake sparks if it only sparks with a sudden trigger release
    so not nice but normal
     
  7. elcaro

    elcaro

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    big all, yeah, could be it's always done that and I've never noticed, e.g. a lot of the time I've used it outside so in sunlight out-of-doors it might not be (so) visible.

    - Terry.
     
  8. JBR

    JBR

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    Yes, come to think of it, mine sparks when released suddenly too! More than coincidence, i think. :LOL:
     
  9. big-all

    big-all

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    in general its a horrible noise a big "bang" not a good noise but the tools are designed with this built in i simply dont like this but this is my problem but in my head a metalic bang with sparks can cause excessive wear
     
  10. mattcook7888

    mattcook7888

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    sounds like normal drill behaviour. The electromagnetic charge produce sparks from brushes
     
  11. If it's sparking enough to be questioned it's not normal.
     
  12. big-all

    big-all

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    its not in use its only when he releases the trigger and the electric brake kicks in
     
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