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PTO not engaging.. HELP

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jcolebbs, Mar 3, 2019.

  1. Mar 3, 2019 #1
    jcolebbs

    jcolebbs Bobtail Member

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    Jan 13, 2019
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    I have '94 GMC White Volvo septic truck. An my PTO switch is not ingageing what is cause in this to happen was working fine the other day
     
    jcolebbs, Mar 3, 2019
    jcolebbs, Mar 3, 2019
    #1
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  3. Mar 3, 2019 #2
    Lazer

    Lazer Road Train Member

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    Jan 22, 2017
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    could be number of things,
    does the pto switch activate with air lines to engage the pto clutch? could be an air line is plugged with ice,
    is there a 'master air valve' that someone flipped off that you have not checked?
    do you have a switch on the dash marked 'pto' that may have failed, or is not in the proper position?
    if cable from foot clutch to the pto, did a clamp loosen and the whole cable harnness is moving, but not the cable inside the harness?
    the cable inside the harness may have broken
     
    Lazer, Mar 3, 2019
    Lazer, Mar 3, 2019
    #2
  4. Mar 3, 2019 #3
    fxwg1980

    fxwg1980 Bobtail Member

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    Mar 2, 2019
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    If it has an airline to it take it off and see if air comes out with switch on, if its an Alisson trans make sure you have power to the solenoid with switch on then go from there
     
    fxwg1980, Mar 3, 2019
    fxwg1980, Mar 3, 2019
    #3
  5. Mar 3, 2019 #4
    jcolebbs

    jcolebbs Bobtail Member

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    Jan 13, 2019
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    It's doesn't have air coming out at the PTO so the gears are fine I'm just not getting power to my Muncie switch next to my set I'm not hereing are when I flip switch an I took cover off an it's air an electric so ware would it get the power from to engagae
     
    jcolebbs, Mar 3, 2019
    jcolebbs, Mar 3, 2019
    #4
  7. Mar 3, 2019 #5
    jcolebbs

    jcolebbs Bobtail Member

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    Jan 13, 2019
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    It's air an electric but I took air line off at PTO an no air so it's not the gears I'm just not getting power to my Muncie switch next to my seat no power or air
     
    jcolebbs, Mar 3, 2019
    jcolebbs, Mar 3, 2019
    #5
  8. Mar 3, 2019 #6
    fxwg1980

    fxwg1980 Bobtail Member

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    Mar 2, 2019
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    you will have to trace it back to the source, it could be coming from anywhere or just run a new wire from a power source.
     
    fxwg1980, Mar 3, 2019
    fxwg1980, Mar 3, 2019
    #6
  9. Mar 4, 2019 #7
    jcolebbs

    jcolebbs Bobtail Member

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    Jan 13, 2019
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    Think that will work
     
    jcolebbs, Mar 4, 2019
    jcolebbs, Mar 4, 2019
    #7
  10. Feb 4, 2022 #9
    Dennyrae61

    Dennyrae61 Bobtail Member

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    Feb 4, 2022
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    I have a 2020 kw 880 with an Allison auto. Pto light comes on but it won't engage
     
    Dennyrae61, Feb 4, 2022
    Dennyrae61, Feb 4, 2022
    #9
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