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Anybody knows how to reverse rotation in this motor

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  • Anybody knows how to reverse rotation in this motor

    I got this motor:

    IMG_1866.JPG
    IMG_1865.JPG

    and wonder does any body knows is it possible to reverse it and if yes - how?
    (i'm tempted to switch red and black )

    Name plate says:
    Prestolite
    model PL7741
    1/2 hp S.F.
    115V 6.8 amp
    type S.P
    code 5 C
    Sarnia Ontario, Made in Canada

    There is no wiring diagram.
    And that red button on the back - anybody knows what it it for?

    Thank You
    Last edited by vasyl_y; 08-16-2012, 09:30 PM.

  • #2

    Re: Anybody knows how to reverse rotation in this motor

    Re: Anybody knows how to reverse rotation in this motor

    The red button is a reset for a thermal overload built into the motor.

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    • #3

      Re: Anybody knows how to reverse rotation in this motor

      Re: Anybody knows how to reverse rotation in this motor

      It's ohmeter time.

      If the motor is reversible, the start or run winding will be on studs so you can flip the leads.

      Make a sketch of the wiring now, and use your ohmeter to determine if the available leads are one winding.

      Write down what you find, then it will be apparent whether the motor can be reversed...........Rod.
      Work is the curse of the riding class.

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      • #4

        Re: Anybody knows how to reverse rotation in this motor

        Re: Anybody knows how to reverse rotation in this motor

        Hi,

        To reverse a motor. You should reverse T5 and T8. If you find those wires (T5-T8).

        luc

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        • #5

          Re: Anybody knows how to reverse rotation in this motor

          Re: Anybody knows how to reverse rotation in this motor

          Hopefully you might find your info at Prestolite motors , product technical support: http://www.ametekfsm.com/Technical_reference.aspx

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          • #6

            Re: Anybody knows how to reverse rotation in this motor

            Re: Anybody knows how to reverse rotation in this motor

            To change direction swap red and black wires on marked terminals. (this seems like a standard way for blower type motors).
            prestolite_marked_pins.jpg

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