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  1. #1
    Super Member DaveT435's Avatar
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    Rupes 21 Mark II

    Got a new Rupes 21 Mark II. Worked great for about 30 minutes. Now when I pull the trigger I just get a humming sound. Power supply is good. Does anyone know of anything else I may be able to easily check that could be causing this problem??
    2015 F-150 Crew Cab Lariat
    2016 Chevrolet Camaro 2SS

  2. #2
    Super Member Rsurfer's Avatar
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    Re: Rupes 21 Mark II

    Quote Originally Posted by DaveT435 View Post
    Got a new Rupes 21 Mark II. Worked great for about 30 minutes. Now when I pull the trigger I just get a humming sound. Power supply is good. Does anyone know of anything else I may be able to easily check that could be causing this problem??
    Are you plugged into an extension cord or direct into the wall?

  3. #3
    Super Member PaulMys's Avatar
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    Re: Rupes 21 Mark II

    Sorry to hear that, Dave.

    Probably not something you want to hear having a brand new machine, but what I would do if it were mine is to try and spin the armature by hand (while unplugged, of course). Then plug it back in and try hitting the trigger.

    If it takes off and starts, that's usually an indication of bad brushes, brush contact, bad armature, or a combo. :/.
    It is no coincidence that man's best friend cannot talk.

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