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Old power tools ?????

Discussion in 'The Lounge' started by jarheadk5, May 22, 2004.

  1. jarheadk5

    jarheadk5 1/2 ton status

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    Anyone know much about old power tools? Specifically, an older Craftsman radial arm saw. It used to work well, but now the motor won't start or run. It's a capacitor-start motor, and there IS power coming into the J-box where the capacitor is. I suspect that the cap is dead. Is there an easy way to check this theory, or should I just try to track down the appropriate cap, replace it, and see what happens?
     
  2. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    If its not the cap, most likely its the brushes. If you plug it in the cap should charge, but only to a set # of microfarads. If you short the out leg to ground in the dark it should spark. I would check the brushes 1st though. This assumes eveything else is good.
     
  3. jarheadk5

    jarheadk5 1/2 ton status

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    Is there a way to check the cap with a multimeter?
    I'm looking at the parts breakdown in the manual for the saw, and I don't see brushes listed as a part. EVERYTHING else is listed, down to wire nuts in the J-box, but no brushes. Could this be a brushless motor???
     
  4. jarheadk5

    jarheadk5 1/2 ton status

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    Anyone?? /forums/images/graemlins/confused.gif
     
  5. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    Being old I doubt it. The brushes are just bolcks of carbon. Nothing to check, when they wear out they are gone.
     
  6. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    Hey I forgot to mention unplug the saw before you short the cap. I assumed you would know that, but just in case..
     
  7. jarheadk5

    jarheadk5 1/2 ton status

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    I hear ya there. I plugged and unplugged that saw so many times while shooting the wiring that a couple times, when I thought I had found a dead wire, it was really that I hadn't plugged it back in... /forums/images/graemlins/doah.gif
     
  8. bigjbear

    bigjbear 1 ton status Staff Member Moderator

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    Did you make any progress? (& BTTT, maybe someone can help)
     
  9. jarheadk5

    jarheadk5 1/2 ton status

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    Nah, other stuff got in the way. Going on a brief vacation this coming week, then I'll be back to it the week after. Thanks for the help, BTW.
     
  10. SF87K5

    SF87K5 1/2 ton status

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    Hell if it is a Craftsman just take it back to Sears and exchange it. Remember Craftsman have a life time warranty. /forums/images/graemlins/thumb.gif
     
  11. jarheadk5

    jarheadk5 1/2 ton status

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    [ QUOTE ]
    Remember Craftsman have a life time warranty.

    [/ QUOTE ]

    Only hand tools, not power tools. Especially not power tools that are, quite possibly, older than the owner. /forums/images/graemlins/doah.gif
     

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