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Western Uni mount MVP problem

Discussion in 'Western Plows Discussion' started by plowninja, Jan 11, 2013.

  1. plowninja

    plowninja Member
    from Iowa
    Messages: 35

    not sure of the year but I have a unimount mvp. The right wing will not move , it won't go into vee or scoop either . The left wing works just fine.

    What I have done
    -checked all cartriges- look to be working
    -checked coils- tested fine
    -readjusted the pressure releif valves
    -pulled out the P/O valves -seemed ok
    -pulled a part ram- looks fine just needed the wiper replaced

    it still won't work. If I click the right wing button it will move a couple of inches but if i hold down on the button it wont do anything. It will go left in straight mode but not right.

    I need help! did i over look something? any ideas would be appreciated

    Thanks
    Tony
     
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,994

    Did you make sure your getting the pwr signal when you press right ?
     
  3. plowninja

    plowninja Member
    from Iowa
    Messages: 35

    no sure what you mean by "power signal". do you mean the controller? I guess I haven't looked but just assumed because the pump works but nothing happens.
    Thanks
     
  4. snowplowparts

    snowplowparts Inactive
    Messages: 67

    As always, disconnect grill plugs, make sure they are clean re-connect

    You said it will go left,
    if this is correct, take jumper cable from + battery
    and connect to plow motor +.(stand clear!)

    The right wing will retract- no valves need to be energized just power to the motor!!

    Start with that to get a base line and lets go from there.
     
  5. plowninja

    plowninja Member
    from Iowa
    Messages: 35

    ok it doesn't retract. The ram then?
     
  6. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,994

    I was meaning pwr to the right wing solenoid when you press the controller to the right.
     
  7. snowplowparts

    snowplowparts Inactive
    Messages: 67

    If putting power direct to the motor and it did not retract,
    my best guess is a bad valve or pilot check valve.

    By going direct power it tkaes the controller,harness out of the picture.

    This would help- yes or no answer:

    up:
    down:
    left:
    right:

    scoop:if only one side works,note that
    vee: :if only one side works,note that

    L wing out:
    L wing in:

    R wing out:
    R wing in:
     
  8. plowninja

    plowninja Member
    from Iowa
    Messages: 35

    up - yes
    down - yes
    left -yes (kind of, right wing slowly creeps into position)
    right- no ( not the left wing either)

    scoop- no ( either left or right responds)
    vee- no (either wing doesn't respond)

    L wing - all function
    R wing - no function

    so if it was to retract when i put direct power then you think it prob would have been electrical? i just want to have further knowledge on your thought process

    thanks
    Tony
     
  9. plowninja

    plowninja Member
    from Iowa
    Messages: 35

    there is power to the 2 right extend but actually it looks like no solenoids power to retract right only motor functions
     
  10. plowninja

    plowninja Member
    from Iowa
    Messages: 35

    ok after looking at all the schematics it looks like P/O "D" is the common with all of the functions not working. am i correct?
     
  11. snowplowparts

    snowplowparts Inactive
    Messages: 67

    pilot valve b

    in common is right, right extend, right retract

    Im not saying d is not a problem just that b is more in common.
     
  12. plowninja

    plowninja Member
    from Iowa
    Messages: 35

    ok. I pulled those out and the o rings looked ok. Is there something else I should be looking for?

    I really appreciate your help. I was ready to burn that thing down
     
  13. snowplowparts

    snowplowparts Inactive
    Messages: 67

    i would start with S5 and S6 valves.

    Remember if the coil does not slide off the valve with no effort, look at valve
    extremely careful for bend, but more common swelling!
    the valve would be bad
     
  14. plowninja

    plowninja Member
    from Iowa
    Messages: 35

    Ok got it to move but still very slow and not responsive. Thinking going to just repace the check valves too.

    Thanks for the help
    (will order from your site snowplowparts for all the help)
     
  15. snowplowparts

    snowplowparts Inactive
    Messages: 67

    Anytime, if you need further help, pm your phone #, were available 7 days a week.
    Thanks SPW.