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Unimount hydraulic question

Discussion in 'Western Plows Discussion' started by Mister Plow, Feb 3, 2016.

  1. Mister Plow

    Mister Plow Senior Member
    Messages: 139

    I have a unimount that seems to be struggling to move the blade around. I think I have it figured out, but would like some input as to if I'm on the right path.

    Background:
    I put the plow on a different truck this year..(not important).... and flushed the fluids out and cleaned the intake filter. I did remove the 4-way (S-3) solenoid because it was sticky and not allowing the plow to go left. I got it freed up and running decent, but not great.

    Now, when ever I move it, it seems to struggle against it self...

    When moving left or right, it also pushes forward with both rams. I can see the plow tilt forward as it moves, and straighten back up when the movement stops. It also tilts forward when lifting it up, then straightens when I stop lifting it up. Again, like both rams are getting pressure whenever the pump is engaged.

    I think I need a new 4-way solenoid (S-3)

    If fluid is leaking from one side of the spool to the other, instead of being separated, it seems to me that it would be appyling pressure to both rams......... Does this sound like it is my problem??
     
  2. Western1

    Western1 Senior Member
    from MI.
    Messages: 679

    It sounds like a good place to start. It wouldn't hurt to remove all the valves and check them for movement and condition especially the orings.
     
  3. Mister Plow

    Mister Plow Senior Member
    Messages: 139

    Ahh..... the O-rings......... I hadn't thought about that, but that makes sense, too.. (where is the face-palm emoji?)
    And a lot cheaper to try. :)

    If I do need an S-3 valve, where is the most econimical (cheap) place to buy one??
     
  4. Mister Plow

    Mister Plow Senior Member
    Messages: 139

    I figured out that I can take the coil from the S-1 valve, and with the plow in the float mode (solenoid coil energized) I can slip it on and off the other valves and hear the "click" of the spool moving back and forth. That's how I determined the S-3 was not moving.

    Anyways, is there an 0-ring kit you can purchase for these valves? Pulling them out and measuring them up is not a big deal, but if there is a kit, it would make it easier.
     
  5. Western1

    Western1 Senior Member
    from MI.
    Messages: 679

    You can try Angelo's or cpw. They will ship.
     
  6. Western1

    Western1 Senior Member
    from MI.
    Messages: 679

    Pretty sure if you went to a dealer you can get just the orings.
     
  7. mishnick

    mishnick 2000 Club Member
    Messages: 2,243

    Western does not sell o ring kits for valves but we have gone to a local hydraulics specialty shop and aquired them. Just take the valve so they can get the number off of it.