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unimount problem

Discussion in 'Western Plows Discussion' started by ford4x4guy74, Feb 26, 2014.

  1. ford4x4guy74

    ford4x4guy74 Junior Member
    Messages: 20

    Helping a friend with his plow. Its a uni-mount , controller has a six pin plug on it. Left and right works fine, down doesn't do anything, can't even push ram down. Up button makes plow angle left...controller not the issue, already tried another one and plow did the same thing....any help and suggestions greatly appreciated! Have 6-10 inch snow coming on Saturday!
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,392

    Ok. No dwn and no raise ?
    For dwn you should be getting pwr at s1 which is why/yel.
    Now for raise you should have pwr at s3 which is ltblu.
    But when you raise your getting pwr at ltblu and ltgrn.
    Start with your lower pwr and see if you have pwr when your pressing the clicker dwn
  3. mishnick

    mishnick 2000 Club Member
    Messages: 2,353

    Is it possible that someone cranked the quill valve in to the bottom? This would block fluid from flowing in or out of lift ram. It's a screw on top of the valve block very close to base of lift ram.
    Pull your plow valve cover off too and look at the coils. Make sure all three coils have wires securely connected. Look inside valve cover for wire diagram to b sure they r connected right. Moving left when hitting up suggests to me that s2 is stuck open...... Actually that explains everything!
    Looking at the valves S2 is upper left. Pull that valve and inspect for damage. Put coil on and use 9v battery or jumpers to truck battery to magnetize coil. U should hear a distinct click when u make and break contact. If not replace valve.
    Note: make sure plow is lowered or supported before pulling valves and wear glasses when testing valve for click. They squirt oil in people's eyes! Lord tunderin bys be carful.
  4. ford4x4guy74

    ford4x4guy74 Junior Member
    Messages: 20

    Ok, thanks for the information...will do some testing and see what we find. Thanks again for the information!
  5. mishnick

    mishnick 2000 Club Member
    Messages: 2,353

    Here is the mechanic's guide for your Uni straight blade, see page 17 for hydraulic schematic. http://library.westernplows.com/westernplows/pdffiles/21936_121704.pdf
    Notice there that this model has fluid going through the quill valve both up and down. Quill is like a little needle valve you screw in to restrict the flow (making blade drop slower) or screw it out to make blade drop faster. In newer plows the fluid only flows through quill valve on the way down, up bypasses so they raise as fast as the pump can push them. But I still think your problem is the S2 stuck in the activated position.