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Dump trailer coming down slow

Discussion in 'Tanker, Bulk and Dump Trucking Forum' started by Loaderlou, Aug 4, 2020.

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  1. Aug 4, 2020 #1
    Loaderlou

    Loaderlou Medium Load Member

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    Feb 24, 2014
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    Hi all. I have an east dump trailer hooked up to my 379 pete. Trailer goes ip fine, well maybe a little slow, but takes forever to come down. My Ball valve is open all the way and I squirted half a can of Pblaster on the pump mechanism and worked it in and out. Is there an adjustment anywhere on the pump or anything else I can try
     
    Last edited: Aug 4, 2020
    Loaderlou, Aug 4, 2020
    Loaderlou, Aug 4, 2020
    #1
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  3. Aug 4, 2020 #2
    okiedokie

    okiedokie Road Train Member

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    PNWET
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    Hydraulic tank vent cap plugged?
     
    okiedokie, Aug 4, 2020
    okiedokie, Aug 4, 2020
    #2
    Loaderlou Thanks this.
  4. Aug 4, 2020 #3
    Roberts450

    Roberts450 Road Train Member

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    Feb 6, 2016
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    When was the last time the hyd filter was changed?? If I recall right they filter the oil going into the tank not coming out and into the pump.
     
    Roberts450, Aug 4, 2020
    Roberts450, Aug 4, 2020
    #3
    Loaderlou Thanks this.
  5. Aug 4, 2020 #4
    NightWind

    NightWind Road Train Member

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    Sunny South, AL
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    Check the filter on the tank, the bleeder valve on the cylinder and make sure the hydraulic lines are tight.
     
    NightWind, Aug 4, 2020
    NightWind, Aug 4, 2020
    #4
    Loaderlou Thanks this.
  7. Aug 4, 2020 #5
    Loaderlou

    Loaderlou Medium Load Member

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    Feb 24, 2014
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    Thanks guys. I have a 3/4” ID hose as a vent. Did notice a small puddle below it the other day. I’ll check that out. I don’t have a filter on my hydraulic system, it’s basically a free flow back to the tank
     
    Loaderlou, Aug 4, 2020
    Loaderlou, Aug 4, 2020
    #5
  8. Aug 4, 2020 #6
    Loaderlou

    Loaderlou Medium Load Member

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    Feb 24, 2014
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    My piston is the original from 2005. 50 ton hoist and the collars are weeping a bit. Maybe sucking air?
     
    Loaderlou, Aug 4, 2020
    Loaderlou, Aug 4, 2020
    #6
    NightWind Thanks this.
  9. Aug 4, 2020 #7
    NightWind

    NightWind Road Train Member

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    Nov 11, 2006
    Sunny South, AL
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    Sounds like the packing is weeping. Some times the auto bleeder valve on the top of the cylinder gets stopped up and needs cleaning. I'd check the filters and lines. You'd be surprised what a loose line will cause. When its loose the valve can't open or close correctly and that causes the entire system to slow down (like a finger in a drain). I'd also undo the butterfly valve and reseat it.
     
    NightWind, Aug 4, 2020
    NightWind, Aug 4, 2020
    #7
  10. Aug 4, 2020 #9
    Loaderlou

    Loaderlou Medium Load Member

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    Feb 24, 2014
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    You know come to think of it, I just had the unit apart and I could swear I tightened the butterfly with a hammer. I will go over everything again. Thanks to all of you.
     
    Loaderlou, Aug 4, 2020
    Loaderlou, Aug 4, 2020
    #9
    NightWind Thanks this.
  11. Aug 4, 2020 #9
    NightWind

    NightWind Road Train Member

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    Nov 11, 2006
    Sunny South, AL
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    Some times that stupid butterfly doesn't seat correctly and you have to undo it and reseat it. Let us know what it was if you don't mind please.
     
    NightWind, Aug 4, 2020
    NightWind, Aug 4, 2020
    #9
    blairandgretchen Thanks this.
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