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How much play in Uni Mount at pivot?

Discussion in 'Western Plows Discussion' started by dcwn.45, Feb 18, 2011.

  1. dcwn.45

    dcwn.45 Member
    Messages: 45

    I broke the A frame of my unimount, it was already welded once by previous owner, I re welded and reinforced it.
    My question is how much wobble should it have?
    If I bolt it up and shim it with a washer I can get it very smooth with not much wobble.
    Should there be some wobble to avoid stressing the A frame?
  2. twinman326

    twinman326 PlowSite.com Addict
    Messages: 1,683

    Here is some info regarding your question


  3. dcwn.45

    dcwn.45 Member
    Messages: 45

    Great info! Thanks
  4. Andy's Beast

    Andy's Beast Member
    Messages: 31

    So if i have some play in mine, I should replace bolt and just shim it with a washer? Igot my bolt a 1/16th of a turn tighter, but I did not want to force any more. This helped a little with play. I had a Western dealer recommend that i replace the A frame or have it welded. So welding will eliminate all play, but it will break sooner than later, right?
  5. twinman326

    twinman326 PlowSite.com Addict
    Messages: 1,683

    What I should of also post in #2 was
    if your nose plate or the quadrant pivot hole is "oblong" then you should repair both parts before proceeding to secure or tighten the quadrant and "A" frame together.

    As for your question Andy Beast
    If the two need repair work, have the welder weld a flat washer on the top and bottom holes of the quad were the pivot bolt goes through after he repair the holes.. This will strengthen the holes...

    I also thought about using washers, instead I order the following parts ( if you have a western pro)

    Tube spacer # 63492 (here is the link) 1.06 long (had to grind mine down a little)


    Bolt # 63573 (link..you might be able to get this at any hardware store) 3/4-10x4" flange grade 8


    Nut #63574 (link..you might be able to get this at any hardware store) 3/4 -10 flange nut


    and a 3/4 flat washer..
    Last edited: Feb 18, 2011
  6. mishnick

    mishnick 2000 Club Member
    Messages: 2,353

    I have rebuild numerous a-frames & quadrants and have found that when you do "too good" a job and eliminate the play completly then they tend to shear off the pivot bolts. When you remove the quadrant from the a-frame then you may find that you need a lot more than a washer. Often the a-frame tip is completly broken away on the top plate. Just welding usually isn't enough, I generally install a bit of pipe on both the a-frame and the quadrant but it's not a ten minute job.