Please Help with Terex / ASV PT-80 Hydraulics!

Discussion in 'Heavy Equipment & Pavement' started by choc, Mar 7, 2012.

  1. choc

    choc LawnSite Member
    from Iowa
    Messages: 3


    I am a farmer and new to the skidsteer world. Unfortunately we experienced severe flooding from the Missouri River in 2011. We had massive amounts of cleanup to deal with and knew that we would need a skidsteer as one of our tools. Since we knew we would be working in muck, quick sand and other severely adverse conditions, we bought a Terex / ASV PT-80 based on its reputation to perform in such conditions.

    We have had the machine since September 2011 and are generally happy with it. It has certainly lived up to our expectations in terms of ability and agility. We have been in conditions I never would have taken dreamed it would go through. However, one point of frustration has been with the hydraulics. Whenever I have an attachment on that utilizes the auxiliary hydraulics, I have problems if I change oil direction during mid-stroke. The speed of the cylinder slows to a crawl. For example, if I have my grapple on and I try to open it partway and then close it, the hydraulics are painfully slow. If I close the grapple all of the way and actually hit the stop on the cylinder, and then open it, the speed is fine. But if I stop opening before the cylinder is fully retracted, the speed slows to a crawl again. It does the same thing with the cylinders on our 6-way dozer blade, so it is not just the attachment.

    It is very frustrating that we have to completely extend and retract the cylinders in order to keep the oil flow speed normal. It really impacts our productivity. Our dealer tries hard, but has been carrying the Terex skid for only a short time, so they are still learning. They checked the hydraulic pressures and said they were within specs. I am not sure if they check gallon per minute flow. When the dealer contacted Terex, they were told that this was normal behavior and that they cylinders must extend/retract fully before changing direction. Is that true? It doesn't seem to be the case on other brands of skids that I have seen operate. No one else around here owns a Terex / ASV for me to ask. So I would appreciate it if any of you other PT-80 / SR-80 owners out there can weigh in. It only seems to be in the auxiliary hydraulics; boom and undercarriage operation has always been fine. Since I don't own any high flow attachments, I have only tried the low flow.

    I hope some of you fellow owners out there can give me some advice.


  2. tailboardtech

    tailboardtech LawnSite Senior Member
    Messages: 390

    The only thing I could think of is somthing hanging up in the valve or the selenoids are sticking unfortunately you probably will not find many asv fans here, me being one of them
    Posted via Mobile Device
  3. choc

    choc LawnSite Member
    from Iowa
    Messages: 3

    Yes, I did read this forum quite a bit before we made the purchase and was well aware of some of the ill feelings toward the ASV brand. We shopped a lot of different brands before we ultimately settled on the Terex. Given the conditions that we were facing and the fact the machine was going working in extreme mud A LOT, features such as the extra ground clearance, open undercarriage design and excellent traction kind of sealed the deal for us. As I said, the Terex has not disappointed in that regard, but there are definitely some aspects of it that lack refinement compared to its competitors.

    If I could solve this hydraulic issue, I would count myself as a pretty satisfied customer so far.
  4. sven1277

    sven1277 LawnSite Senior Member
    Messages: 681

    I have an sr 70. I have never experienced that type of problem. I use a 4in1 bucket regularly and absolutely no problem when changing direction. I also think it could be solenoids, or maybe the relief valve. Call Terex yourself. Good luck.
  5. Digdeep

    Digdeep LawnSite Bronze Member
    Messages: 1,840

    I can't tell you much about the PT80, but it sounds like something is not opening all the way. Does the machine have variable flow? Maybe it is stuck. I would call them direct and ask to talk to someone in service. I have talked to both Tim or Cameron when I have had technical questions and both have been very helpful- 218-327-3434.
  6. talus

    talus LawnSite Senior Member
    Messages: 718

    Like the others say it's probably just something simple. I wish I could be more help. I have an 80 and it doesn't do the problem you described. I'm one of the other fans on here lol
  7. J. Peterson Grading

    J. Peterson Grading LawnSite Senior Member
    from IA
    Messages: 989

    Both of my PT80s has never done that, and I have never heard anyone else have that problem.

    It has to be a valve not working correctly. Who is your dealer?

  8. choc

    choc LawnSite Member
    from Iowa
    Messages: 3

    Dealer is NCS Equipment in Lincoln, NE. As I said above, they have tried to be helpful, but they just picked up the skid line less than a year ago after it had been rebranded Terex, so they are still getting to know it.

    I heard that the ASV team did not transfer to Terex after the buyout, so they lost a lot of their "institutional knowledge" regarding these machines. Is that true or did they bring over ASV engineers in the buyout?

    I am glad to hear that this problem is not typical of these machines. At least that gives me hope that it can be corrected.

    Thanks for the replies!
  9. Digdeep

    Digdeep LawnSite Bronze Member
    Messages: 1,840

    The guys you will talk to if you call the number in my previous post are most definitely still "ASV" from prior to Terex's buyout. They can walk you through your questions. They have been very helpful in the past when I have called them.
  10. Construct'O

    Construct'O LawnSite Bronze Member
    from Sw Iowa
    Messages: 1,387

    Might check out your quick couplers.Try changing them around different postions.Bad coupler on machine itself.Have had scraper do some weird things when hoses was connectered backward or wrong way.Good luck.

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