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Please make it make sense

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by 85COE, Dec 9, 2022.

Page 1 of 2
  1. Dec 9, 2022 #1
    85COE

    85COE Light Load Member

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    Aug 6, 2019
    Columbus, Ohio
    0
    85 Volvo COE

    New pump
    Lines are clear - tested with air from compressor. Air blows through
    Reservoir is full

    Will not spray fluid onto windshield

    3 shops are stumped
     
    85COE, Dec 9, 2022
    85COE, Dec 9, 2022
    #1
    austinmike and RubyEagle Thank this.
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  3. Dec 9, 2022 #2
    Star Rider

    Star Rider Road Train Member

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    Is polarity reversed on the pump and running it backwards?
     
    Star Rider, Dec 9, 2022
    Star Rider, Dec 9, 2022
    #2
    MAMservices, lester, austinmike and 5 others Thank this.
  4. Dec 9, 2022 #3
    85COE

    85COE Light Load Member

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    Aug 6, 2019
    Columbus, Ohio
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    Air lines are connected properly
     
    85COE, Dec 9, 2022
    85COE, Dec 9, 2022
    #3
    Oxbow Thanks this.
  5. Dec 9, 2022 #4
    Star Rider

    Star Rider Road Train Member

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    The electric going to the washer pump. If the wires are hooked backwards the pump will run in reverse and flow the opposite the way it should.
     
    Star Rider, Dec 9, 2022
    Star Rider, Dec 9, 2022
    #4
    austinmike and Oxbow Thank this.
  7. Dec 9, 2022 #5
    85COE

    85COE Light Load Member

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    Aug 6, 2019
    Columbus, Ohio
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    I failed to.mention it is air-powered

    Old school truck
     
    85COE, Dec 9, 2022
    85COE, Dec 9, 2022
    #5
    Oxbow Thanks this.
  8. Dec 9, 2022 #6
    Star Rider

    Star Rider Road Train Member

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    Michigan
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    I think it would be easier and cheaper to just wire in an electric pump.
     
    Star Rider, Dec 9, 2022
    Star Rider, Dec 9, 2022
    #6
    jsnell, ducnut and Oxbow Thank this.
  9. Dec 9, 2022 #7
    RubyEagle

    RubyEagle Medium Load Member

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    Apr 17, 2010
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    Bad pump?
     
    RubyEagle, Dec 9, 2022
    RubyEagle, Dec 9, 2022
    #7
    singlescrewshaker and Oxbow Thank this.
  10. Dec 9, 2022 #8
    85COE

    85COE Light Load Member

    211
    429
    Aug 6, 2019
    Columbus, Ohio
    0
    You would be incorrect

    Brand new, and tested
     
    85COE, Dec 9, 2022
    85COE, Dec 9, 2022
    #8
    austinmike, singlescrewshaker and Oxbow Thank this.
  11. Dec 9, 2022 #9
    Oxbow

    Oxbow Road Train Member

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    Nov 24, 2015
    Idaho
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    Only thing that comes co my mind is vent in reservoir plugged, but you should see something prior to vacuum lock.
     
    Oxbow, Dec 9, 2022
    Oxbow, Dec 9, 2022
    #9
    singlescrewshaker Thanks this.
  12. Dec 9, 2022 #10
    singlescrewshaker

    singlescrewshaker Road Train Member

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    Dec 31, 2017
    Little Havana, FL
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    You got a new Sprauge control valve in the dash?

    I had one go bad where when I depressed it to spray fluid, air come out the weep hole in the bottom, instead of the line going to the reservoir.. Wipers still worked though..
     
    singlescrewshaker, Dec 9, 2022
    singlescrewshaker, Dec 9, 2022
    #10
    Flint1 Thanks this.
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