Pto on Allison transmission

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by truckerbangin, Nov 2, 2021.

  1. circle h

    circle h Light Load Member

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    Yes, power and ground when the switch is on.
     
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  3. circle h

    circle h Light Load Member

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    Oct 22, 2020
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    Maybe put a jumper with power and ground to your solenoid and see if it engages
     
  4. circle h

    circle h Light Load Member

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    Make sure it's in neutral
     
  5. Inderjit

    Inderjit Medium Load Member

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    Have you got an ohm meter? what is the resistance of the coil?
    What are you driving with the PTO?
     
  6. circle h

    circle h Light Load Member

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    Truck is at the shop. I am at home, won't see it again until tomorrow. Does your solenoid click if you give it 12 volts and a ground?
     
  7. circle h

    circle h Light Load Member

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    Mine runs a pump for a dump box.
     
  8. truckerbangin

    truckerbangin Light Load Member

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    No it isn’t activated by the factory switches. Truck doesn’t have factory switch on dash.
     
  9. truckerbangin

    truckerbangin Light Load Member

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    Solenoid is in pto unit
     
  10. truckerbangin

    truckerbangin Light Load Member

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    That’s what I’m trying to run. What’s the rotation of you dump pump. Clockwise or counterclockwise
     
  11. Inderjit

    Inderjit Medium Load Member

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    The solenoid coil can fail. If it shorts out internally it can lose some of
    the windings making it weak but not blow the fuse. Can you get a new
    solenoid coil and swap it out?
     
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