APU question

Discussion in 'Trucks [ Eighteen Wheelers ]' started by 1source, Nov 6, 2012.

  1. 1source

    1source Bobtail Member

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    Sep 26, 2012
    Old town ,AL
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    Can you run your APU at the same time with your truck motor. I ask this because my truck altnaor went out and I no the apu keeps the batteries charged.
     
    DoneYourWay Thanks this.
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  3. Numb

    Numb Crusty Curmudgeon

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    I've seen guys leave it on all the time. don't know why, never had one. they pull in and its running when they back into dock.
     
  4. robr

    robr Bobtail Member

    Yes you can. I have run the APU when I lost my fan belt. I was told it could be hard on the water pump on the APU unit as it is not designed for the amount of pressure the truck motor puts out, but I did not have any problems.
     
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  5. Hardlyevr

    Hardlyevr Road Train Member

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    only some models can do this, or can be modified in their programming to do so. Stand alone units that are not connected to the trucks coolant system will not have the water pump issue.
     
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  6. EccII

    EccII Bobtail Member

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    Oct 24, 2012
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    on ours you can
     
  7. 1source

    1source Bobtail Member

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    Sep 26, 2012
    Old town ,AL
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    Thanks everyone. my APU is tied into the truck cooling system. and I did't no if it would case the APU to over heat.
     
  8. Flightline

    Flightline Road Train Member

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    If they are tied together, they can run at the same time. But the APU alternator will not put out the capacity you could need with lights and blowers on a steady basis. But it should get you by for a while.
     
    DoneYourWay Thanks this.
  9. 1source

    1source Bobtail Member

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    Sep 26, 2012
    Old town ,AL
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    I thank you for the info
     
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