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Etnyre chip spreader chaos

Discussion in 'Other Paving Equipment' started by Vetech63, Apr 20, 2021.

  1. Vetech63

    Vetech63 Senior Member

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    I got to repair this big ugly yesterday.
    Etnyre chip spreader.jpg
    This is a 2004 model, sold to a county here in Oklahoma. This was an auction machine bought by a "equipment dealer" AKA "a company that buys auction crap, fixes a few things, and sells it for profit". The machine was delivered to the county less than a month ago and they tried to use it........but the park brake kept applying and the hydraulic speed was uncontrollable. The seller spent the last 3 weeks replacing parts ...........almost everything having to do with the park brake: pump; solenoid valve, pressure sensor, and a VCU recalibration. Not sure how many $1000.00's spent so far and NO FIX.
     
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  2. Paul Council

    Paul Council Senior Member

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    I will fix it for what is spent already plus parts. :D
     
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  3. Vetech63

    Vetech63 Senior Member

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    The first thing I got was the electrical and the hydraulic schematics from Etnyre and had them blown up to poster size so I could read them. After talking to the operator and the county commissioner about the symptoms, I decided to start with pressure checking the brake system. I tee'd into the service brake line and got 250PSI.......low pressure since it is supposed to be spec at 400PSI (operates off off pump charge pressure.) So next I remove the park brake line at the park brake (spring applied, hydraulic release). Etnyre guage.jpg
    Notice that I have a 1000 PSI guage on the line. I'm looking for 400PSI when the park brake is disengaged. Hit the switch............NOTHING. Hit it again several times......NADA. I then look down at the park brake line through the floor panel (The end that is hooked to the hydraulic manifold) and I can see it flex with the switch every time. HMmmmmmmmo_O
     
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  4. Vetech63

    Vetech63 Senior Member

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    SO.........I engaged the hydraulics and guess what?! I get pressure at the park brake line...........plenty of pressure, as a matter of fact , it dam near blows my gauge apart. Bent the needle and ruined my gauge. Interesting!! SO I decide to trace the hoses out and find the other end of the park brake line hooked to..................
    Etnyre compensater.jpg
    THE RIGHT SIDE OF THE PUMP COMPENSATOR! LMAO
     
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  5. Vetech63

    Vetech63 Senior Member

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    Well, this is definitely NOT right..........so I go to the hydraulic manifold and find the park brake outlet......
    Etnyre park brake.jpg
    Marked as PB of course, THIS hose should be the one at the park brake housing. SO why did I get a huge blast of pressure at my park brake line when I engaged the hydraulics you say? I trace the above line to answer this question.
     
  6. Vetech63

    Vetech63 Senior Member

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    ITS because...........it is plumbed in at................take a wild guess here!................
    Etnyre LS1.jpg
    ITS LOCATED AT LS1! LMAOO!!!!!!!!!!!!!!!!! Switch the 2 lines where they are supposed to go and WAHHLAAAA, problem solved!
    SO.........the moral to this amazing story is "DO YOUR OWN TROUBLSHOOTING REGARDLESS OF WHAT YOU ARE TOLD!" MAN, I LOVE my job!!;):D:p:cool:
     
  7. Paul Council

    Paul Council Senior Member

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    Electrical and hydraulic problems are my favorite ones to solve. Because when you find the problem and fix it you are the hero. And no matter how well you explain how you found the problem and what you did to fix it. If it happened again tomorrow they still couldn't fix it. Good job on finding the problem.
     
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  8. Vetech63

    Vetech63 Senior Member

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    I drove 3 hours to fix this in 1 hour. These are the perfect jobs! I wish I had 100's of these lined up!
     
  9. skyking1

    skyking1 Senior Member

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    That s a sheeeeit ton of attaboys you just racked up!
     
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  10. Nige

    Nige Senior Member

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    I hope your invoice includes a charge for a replacement 1000psi pressure gauge........
     
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  11. Vetech63

    Vetech63 Senior Member

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    Of course it did!
     
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  12. Nige

    Nige Senior Member

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    Just a thought but that's a perfect use for a Tetragauge when you have no idea what pressure is actually in a system, although you may have an idea of what OUGHT to be in it....... With the biggest gauge range of 5000psi you're never going to wind it off the clock.
     
  13. Vetech63

    Vetech63 Senior Member

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    How much
    is one of those now?
     
  14. Nige

    Nige Senior Member

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    G..G..G..Granville...........!!
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  15. ianjoub

    ianjoub Senior Member

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    Ahhhh, a job well done. Get paid properly for your knowledge and skills!
     
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