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Unimount Plow dripping fluid near valve body

Discussion in 'Western Plows Discussion' started by 24v6spd, Feb 21, 2011.

  1. 24v6spd

    24v6spd Senior Member
    Messages: 615

    I have a unimount and noticed fluid dripping from near the valve body. What should I check, o-rings?
     
  2. mishnick

    mishnick 2000 Club Member
    Messages: 2,243

    Since it is a unimount there is no shrowd covering the valve body, clean the thing off reall good and then get someone to operate it while you (very carefully to avoid being crushed) watch for the source of the fluid. It could be just a loose fitting or a failing hose crimp. Your description of uni-mount doesn't say much to let us help you. Is it a V plow or straight blade? Old cable operated or a newer Isarmatic? It's pretty simple though to track a leak. It's like finding the source of a river, just look up stream. Clean off the unit so you can see where the oil is flowing and follow it up to the source. If it's coming from under the valve covers then take the cover off and see where, under there, it is coming from. Could be just a loose valve cartraige or a loose plug. Also be careful of high pressure fluid spray, wear glasses when looking for the leak.
     
  3. twinman326

    twinman326 PlowSite.com Addict
    Messages: 1,683

    it could be several things

    A) boss plug O ring leaking (bottom of the manifold)
    B) O rings leaking between the hydraulic unit and the manifold
    C) A 1/8 plug leaking between the manifold and the hydraulic unit
    D) Packing nut, the seal could be leaking fluid when the plunger (lift ram) raise or lower because of a bad wiper seal

    Those are the places I would check..

    diagram

    boss plug.jpg

    boss plug.jpg
     
    Last edited: Feb 21, 2011
  4. 24v6spd

    24v6spd Senior Member
    Messages: 615

    My plow has had 17 years of hard service. The wiper rings are leaking but the drip was coming from the bottom of the valve body. I have replaced the o-rings on the manifold once about 5 years ago. I just want to get through this seasons and then I should dismantle the power unit and replace all seals and o-rings Do they sell a complete seal and o-ring kit?
     
  5. 24v6spd

    24v6spd Senior Member
    Messages: 615

    How involved is it to replace the wiper packing and seal? I notice there is some corrosion on the bottom of the valve body is it aluminum? How do I tell if the valve body is a 2500 or 3500?
     
  6. twinman326

    twinman326 PlowSite.com Addict
    Messages: 1,683

    The last time I check with my plow part guy, they only sell the 3500..

    As for the leak it might be the "boss" plug O ring (bottom)

    Here a link for the 3500 valve body ($271.00).. It is bare..New and complete $700.00
    http://www.angelos-supplies.com/sno...h/49224/List/1/Default.aspx?SortField=EAN,EAN

    I just brought a kit last year..I was charge 40.00 (to me that was a lot), and it came with all the O rings..

    Here is a master seal kit (link)

    http://www.angelos-supplies.com/sno...oductID/145499/Default.aspx?SortField=EAN,EAN




    As for the wiper seal, I would just buy the complete seal set for the lift are..Not hard to do, just time consuming..Take the packing nut off (if not frozen), pull it straight up in out..Have you try tighten the packing nut down a little??

    You can pick up the wiper set between 10.00-15.00 either at Napa, or your local plow dealer..Here is a link
    http://www.equipmentspecialistsinc....ns=prodsearchp&ecom--prodsearch--string=25205

    Here is a part number diagram. This page is part of the one in post #3

    packwiper.jpg

    packwiper.jpg
     
    Last edited: Feb 22, 2011
  7. 24v6spd

    24v6spd Senior Member
    Messages: 615

    I tracked down the leak, it is coming from between the valve body and the power unit. Must be an o-ring, I am changing them tommorow. I have tried tightening the nut but it is still leaking. Thanks for all your help.
     
  8. twinman326

    twinman326 PlowSite.com Addict
    Messages: 1,683

    You have three "O" rings between the unit and the manifold.. Don't snap the 3 bolts when you tighten the manifold back to the pump housing...

    I would buy the "O" ring set so you have them on hand...
     
  9. 24v6spd

    24v6spd Senior Member
    Messages: 615

    Are those parts from Angelo's genuine Western parts or aftermarket?
     
  10. 24v6spd

    24v6spd Senior Member
    Messages: 615

    Mine only has 2 bolts. I am more worried about snapping bolts taking them out.
     
  11. Western1

    Western1 Senior Member
    from MI.
    Messages: 679

    There should be three bolts. Maybe thats the problem?
     
  12. 24v6spd

    24v6spd Senior Member
    Messages: 615

    I just went out and looked and there are 3 bolts. I didn't see the one under the swivel fitting.
     
  13. twinman326

    twinman326 PlowSite.com Addict
    Messages: 1,683

    Just take your time with the bolts...
     
  14. towpro570

    towpro570 Senior Member
    Messages: 241

    i have a leak at the boss o ring went to add fluid and when i opened the filler it pushed air out any ideas its a pro plow thanks :salute:
     
  15. twinman326

    twinman326 PlowSite.com Addict
    Messages: 1,683

    Towpro

    You have a "ultra" mount?

    or

    Unimount?
     
  16. towpro570

    towpro570 Senior Member
    Messages: 241

    uni mount
     
  17. towpro570

    towpro570 Senior Member
    Messages: 241

    bump bump
     
  18. towpro570

    towpro570 Senior Member
    Messages: 241

  19. twinman326

    twinman326 PlowSite.com Addict
    Messages: 1,683

    Towpro..If you want to play games, then do it somewhere else..Were here to help and be serious at the same time, not to play games
     
  20. 24v6spd

    24v6spd Senior Member
    Messages: 615

    Replaced the 3 o-rings but still noticed a slight drip. I think it's coming from the wiper seal. Does the packing nut have a seal contained in it? Do I have to replace the packing nut?