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Western Isarmatic - Motor Stuck On

Discussion in 'Western Plows Discussion' started by swa, Dec 25, 2007.

  1. swa

    swa Junior Member
    Messages: 10

    Hi-

    I have a Western Isarmatic Mark 3a on an 86 Suburban.

    Yesterday, I was plowing my driveway, cleaning up from the nasty drifts we received on Sunday. I had made a couple of passes, enough to get through when the motor on the pump stuck on. It responded to the joystick, meaning it would go up, down, left or right, but the motor would stay engaged.

    I finally stopped it by disconnecting the lead from the battery.

    I have no idea what to to try looking at, any ideas would be much appreciated.

    Thanks,
    Scott
     
  2. wild bill

    wild bill PlowSite.com Addict
    Messages: 1,239

    stuck

    i think the motor solenoid under the hood is stuck!!!!!!!!!!!!!!!!!!
     
  3. Sawdust Bob

    Sawdust Bob Junior Member
    from Il
    Messages: 24

    Replace the solenoid under the hood! A cheap fix.:waving:
     
  4. swa

    swa Junior Member
    Messages: 10

    Stuck

    Thanks guys.

    I'll give that a shot and let you know how it turns out.

    Scott
     
  5. swa

    swa Junior Member
    Messages: 10

    Stuck Motor

    Well, I got the solenoid replaced, but the motor is still running. Any other thoughts on what to look at?

    Thanks for the help,
    Scott
     
  6. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Does it stop if you disconnect the small wire from the solenoid? If so then either the wire is grounded out somewhere or the switch contact is stuck in the joy stick controller..
     
  7. RAZOR

    RAZOR Senior Member
    Messages: 342

    Could your new solenoid be defective also?
     
  8. swa

    swa Junior Member
    Messages: 10

    Motor Stuck

    B&B -

    I assume that you mean the small wire running from the solenoid to the joystick. I removed that wire and reattached the lead to the motor. The motor started running. Maybe my replacement solenoid is bad.

    Scott
     
  9. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Yes the small wire was the one I was referring too..

    If it runs even with the wire off then either you have a defective solenoid or the solenoid is incorrect and it's a self grounding type, which would make the solenoid activate if you have it attached to something metal on the truck.

    If it is attached to a metal part of the truck. unbolt it and place a rag or shop towel under it to isolate it from being grounded through the mounting bracket. Momentarily re connect the power cable and see if the motor now runs... if it still does, then the solenoid is defective. If it doesn't, then you have the wrong solenoid...
     
  10. itsgottobegreen

    itsgottobegreen PlowSite.com Addict
    Messages: 1,351

    Did you buy a plow solenoid or a regular car solenoid. Because you need one that can handle 200 amps. If not, you will melt it the first or 2nd time you use it.
     
  11. swa

    swa Junior Member
    Messages: 10

    Motor Stuck

    I bought one from the auto parts store. I found out quickly that a Suburban doesn't have the fender mount style solenoid. I guess every car that I had from that era was a Ford and I just made the connection that I could get one there.

    So, now that I fried the solenoid, what other information do I need to get the right kind? Or is knowing that it needs to be a 200 amp solenoid enough?

    Thanks,
    Scott
     
  12. swa

    swa Junior Member
    Messages: 10

    Motor Stuck

    Since it looks like I'm going to need to remove this one, I'll try your test. I suspect that I have the wrong kind of solenoid.

    Thanks,
    Scott
     
  13. sechracer

    sechracer Senior Member
    Messages: 478

    Dunno if you have one there, but Tractor Supply co. sells plow stuff, and they carry the western solenoids...
     
  14. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    A Ford starter solenoid won't work on the old cable controlled pumps because they're activated by 12V, not ground as in the case of the cable controlled pumps.. that's why it's stuck "on".... you need an actual plow solenoid.
     
  15. Runner

    Runner Senior Member
    Messages: 957

    Advance Auto sells the S.A.M. brand of parts and have those solenoids, also. you DO need the self grounding type solenoid. If you are still getting current back to the solenoid and the pump still runs when you hook your battery back up, then you COULD have an issue with the inside of your controller (it is always simple). Something such as you tab plate might be bent and not breaking the connection or something. These metal plates wear out after a while.
     
  16. swa

    swa Junior Member
    Messages: 10

    Motor Stuck

    The replacement that I first bought was from Advance, but I am sure that it wasn't the right one.

    I just picked up a Western from Northern Tool. It is a 3-post instead of a 4-post. It was the only Western solenoid that Northern had. Is that still going to work?

    Scott
     
  17. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    The activation wire coming out from the controller is GROUND, NOT 12V...that's why you can't use a self grounding solenoid.. the the controller is what needs to ground it in order to activate it. If it's already grounded (like a self grounded one) it's gonna be activated as soon as you install the small 12V jumper wire from the big batt cable terminal to one of the small terminals on the solenoid...so if course the motor is going to run as soon as you connect the cable from the motor.

    With the small 12V jumper already on it, it now has 12V, if you do that to a self grounded solenoid, what's it going do?...it's going to activate even without the controller wire connected.

    Install the correct NON SELF GROUNDING solenoid.
     
    Last edited: Dec 30, 2007
  18. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Scott, I think it's also going to be a self grounding 12V activated relay as that's how all the Westerns were after the cable pumps, (although they were also 4 post not 3) so I'd think that's what they'd sell since they'd be the most common.
     
  19. swa

    swa Junior Member
    Messages: 10

    So based on what you put in your previous post, this one is not going to work either?
     
  20. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Without knowing the exact part # I can't say 100% but with only 3 posts, more than likely it's a 12V activated solenoid, not ground activated.. Do you have a part # for it? I might be able to cross refrence it to see exactly what it is.