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Blown Hydraulic line pto noise

Discussion in 'Tanker, Bulk and Dump Trucking Forum' started by Daycabinit, May 13, 2019.

  1. May 13, 2019 #1
    Daycabinit

    Daycabinit Light Load Member

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    Dec 11, 2016
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    I blew the pressure out/up line this morning at a job site (I haul an end dump) I was able to fix it at the job as there was a hydraulic shop a couple blocks away. Before this my pto was quiet couldn’t really hear it. after I got it put back together and went back to work I could hear the pto making a slight wine when I dumped. Any ideas as to why it would do that ? It’s a permco pump the trailer is a 28 ft rock tub
     
    Daycabinit, May 13, 2019
    Daycabinit, May 13, 2019
    #1
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  3. May 13, 2019 #2
    ibcalm19

    ibcalm19 Road Train Member

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    I'm thinking it is air in the system did you bleed it.
     
    ibcalm19, May 13, 2019
    ibcalm19, May 13, 2019
    #2
  4. May 13, 2019 #3
    stillwurkin

    stillwurkin Road Train Member

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    Did you replace oil? With the same viscosity? Didn't lose a rag into the line that you or someone was wiping their hands off with. Sounds like maybe its starving for oil when pumping. I'm just guessing here.
     
    stillwurkin, May 13, 2019
    stillwurkin, May 13, 2019
    #3
  5. May 13, 2019 #4
    AModelCat

    AModelCat Road Train Member

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    Did you run the pump out of oil or did you get the PTO disengaged right away? Starving the pump of oil will cause damage to it. Did you fill the reservoir back up again after replacing the line?

    If your pump is lower than the hydraulic tank level I doubt you'd have air in the system. Typically you'll get pump noise from aeration (sucking in air on the inlet side) or from cavitation (restriction in flow supplying the pump). If you run the box up and down a few times and then look in the tank is the oil foamy? Make sure you vent the reservoir before checking (if its a pressurized reservoir).
     
    AModelCat, May 13, 2019
    AModelCat, May 13, 2019
    #4
    Cat sdp and stillwurkin Thank this.
  6. May 14, 2019 #6
    Daycabinit

    Daycabinit Light Load Member

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    Dec 11, 2016
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    Thanks for the reply’s I had to add about 8 gallons of oil I disengaged the pump as soon as it happened. I bleed the system today seems back to normal it must have been air in the system. Thanks again
     
    Daycabinit, May 14, 2019
    Daycabinit, May 14, 2019
    #6
    spsauerland, stillwurkin, AModelCat and 1 other person Thank this.
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