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Dump valve question...

Discussion in 'Flatbed Trucking Forum' started by Hanadarko, Apr 1, 2013.

Page 2 of 2
  1. Apr 1, 2013 #11
    TwinStickPeterbilt

    TwinStickPeterbilt Heavy Load Member

    707
    910
    Mar 16, 2013
    0
    Care to explain the advantage of it being on the rear? Please? I've pretty much always ran a spread and I've always had them on the front axle flip the switch it pets pressure off the bags I turn flip the switch and they go back to normal. Sorry if I sound rude not trying to he, just curious.
     
    TwinStickPeterbilt, Apr 1, 2013
    TwinStickPeterbilt, Apr 1, 2013
    #11
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  3. Apr 1, 2013 #12
    MJ1657

    MJ1657 Road Train Member

    7,521
    50,152
    Jan 28, 2012
    Isanti, MN
    0
    It lets you turn a little shorter
     
    MJ1657, Apr 1, 2013
    MJ1657, Apr 1, 2013
    #12
    TwinStickPeterbilt Thanks this.
  4. Apr 1, 2013 #13
    carrkool

    carrkool Heavy Load Member

    883
    495
    May 10, 2012
    adah, pa
    0
    turns shorter and less pressure left on the rear axle so it will slide alittle better. I normally run dual dumps with 2 switches so i can dump either axle.

    If you dump the front the weight is still hanging over it verus the rear only has the tail weight left over it. its not much difference biggest is the quicker turn
     
    carrkool, Apr 1, 2013
    carrkool, Apr 1, 2013
    #13
    Hanadarko and TwinStickPeterbilt Thank this.
  5. Apr 2, 2013 #14
    Semi Crazy

    Semi Crazy Road Train Member

    3,033
    2,045
    May 13, 2011
    Middle Tennessee
    0
    Any flatbed I've pulled didn't have a constant leak from the exhaust port of the HCV when the rear axle was dumped. Sum ting wong somewhere.

    The HCV has a neutral position of so many degrees. I think mine is 10. It can't be open to the air bags AND open to the exhaust port at the same time.

    Is your HCV on the rear axle?
     
    Semi Crazy, Apr 2, 2013
    Semi Crazy, Apr 2, 2013
    #14
  7. Apr 2, 2013 #15
    Hanadarko

    Hanadarko Independent Owner/Operator

    2,962
    927
    Oct 1, 2009
    Midwest
    0
    HAHA!
    :biggrin_2559:

    The HCV is on the REAR axle...same one that dumps.

    I'm going to double check that an air line isnt swapped with another.
    I personally installed this entire system and it worked when I installed it and I hadn't noticed anything odd until just the other day.

    I did have some work done and maybe it got swapped. The solenoid doesnt have the ports labeled very well. So if the IN and CYL got swapped, when the dump valve was active, it could be tying the IN and EXH together - but that doesnt explain the EXH out the HCV at this point.

    Or, the solenoid (while new) isn't closing the valve all the way and could end up with all 3 ports tied together I suppose. I need to visually look at this as soon as the parking lot dries up.
     
    Hanadarko, Apr 2, 2013
    Hanadarko, Apr 2, 2013
    #15
  8. Apr 3, 2013 #16
    Hanadarko

    Hanadarko Independent Owner/Operator

    2,962
    927
    Oct 1, 2009
    Midwest
    0
    Ok...Well today I checked, all of the air lines were run correctly and hooked up exact.
    However, I could no longer duplicate this issue ?!

    :biggrin_2556:

    ...maybe the trailer wasn't level or the suspension would bound somehow and causing Sum Ting Wong ?!

    :biggrin_2559:
     
    Hanadarko, Apr 3, 2013
    Hanadarko, Apr 3, 2013
    #16
  9. Apr 3, 2013 #17
    TwinStickPeterbilt

    TwinStickPeterbilt Heavy Load Member

    707
    910
    Mar 16, 2013
    0
    If my trailers not level it will do that sometimes...
     
    TwinStickPeterbilt, Apr 3, 2013
    TwinStickPeterbilt, Apr 3, 2013
    #17
  10. Apr 3, 2013 #18
    Superhauler

    Superhauler TEACHER OF MEN

    12,209
    100,730
    Jan 30, 2010
    keep stroking.
    0
    that little gremlin hiding in there was just mess:biggrin_2556:in with you!
     
    Superhauler, Apr 3, 2013
    Superhauler, Apr 3, 2013
    #18
  11. Apr 4, 2013 #19
    Semi Crazy

    Semi Crazy Road Train Member

    3,033
    2,045
    May 13, 2011
    Middle Tennessee
    0
    That's what the mechanic would write up and then charge you $125 for looking at it! Good work.
     
    Semi Crazy, Apr 4, 2013
    Semi Crazy, Apr 4, 2013
    #19
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