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Super Duty Straight blade won't lower

Discussion in 'Boss Plows Discussion' started by famouslee99gt, Jan 13, 2015.

  1. famouslee99gt

    famouslee99gt Member
    Messages: 68

    I just started having an issue this season with the plow not lowering. It comes and goes. When it does it, I'll have left & right action and can get the pump to engage to raise it, but it will not lower. Sometimes it'll finally break loose and drop, other times I have to crack open the hydraulic line to the lift cylinder to drop pressure. Today I finally got a chance to get the cover off and look at it. The coil on the lift/lower cartridge looked like it had smoke coming off it. It was so hot you couldn't touch it with bare hand. I would think that it's the coil, or would it be the cartridge valve itself? I also noticed it only seemed to act up when pushing into a pile and I had raised the plow all way and maybe the held it with the pump running just a touch after it was raised all the way possibly over pressuring the system?
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,391

    If the coil that hot, start there. Replace it first, IF you want remove the valve but I doubt it'll look bad