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Atlas MFC Belt Won't Disengage

Discussion in 'ATLAS, CRAFTSMAN & AA' started by greenman, Sep 13, 2017.

  1. greenman

    greenman United States Iron Registered Member

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    I've got a 4L350 on the motor pulleys. Doesn't seem to matter how much slack I give it, the belt always runs. It's supposed to slip when the lever is disengaged right?

    Is there something I can put on the belt? Polish the pulleys?

    Thanks.
     
  2. Ulma Doctor

    Ulma Doctor Infinitely Curious Active Member

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    Hi greenman,
    there may be residual friction even with a slack belt.
    it's worse on a new belt because of the increased grip of new rubber, to sufficiently drive the headstock.
    i would suggest turning off the motor when making adjustments, lubricating, or taking the mill in and out of back gear and the problem is no longer a safety issue

    also when shutting down the machine for the day, release the tension on the drive belt to prevent stretching and static form memory from the pulleys
     
  3. wa5cab

    wa5cab Downloads Moderator Staff Member H-M Supporter-Premium

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    Right. If you make it a practice to do anything on the mill while the motor is running other than cut metal, sooner or later you are going to lose a finger, hand or arm. Or worse. Think of it as a Darwin Award tester. The belt tension lever is NOT a clutch.
     
  4. greenman

    greenman United States Iron Registered Member

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    That's fair. Just seems odd but certainly can be worked around.
     
  5. wa5cab

    wa5cab Downloads Moderator Staff Member H-M Supporter-Premium

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    A slack belt can't consistently deliver enough smooth torque to do useful work. But it can usually deliver enough to cut off a finger or break an arm.
     
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  6. greenman

    greenman United States Iron Registered Member

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    Yea I meant the workaround will just be shutting the machine off. I've worked on and around gas powered machinery so I do have some concept of safety. Usually.
     
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  7. wa5cab

    wa5cab Downloads Moderator Staff Member H-M Supporter-Premium

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    OK. :)
     
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  8. greenman

    greenman United States Iron Registered Member

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    Appreciate your concern though! And thanks for all the help!
     

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