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intermittent problem with lift unit

Discussion in 'Western Plows Discussion' started by rjcichino, Jan 3, 2011.

  1. rjcichino

    rjcichino Junior Member
    Messages: 1

    I have a old style convent mount proplow with a electric control. last season had a problem with the lift unit and it seemed to fix itself until 15hrs into this last storm. Here's what happens. if I try to raise the ploe , the motor runs and lifts to a point where the slack in the chain tighens up and then it seems as if it has no pressure to lift and motor seems to struggle. If I try to angle it sounds like the motor/pump runs freewheel (with no load or sucking air) plow does not angle at all. Fluid is full. After the storm was over I checked for power to the proper sol valves and all checked out good. I removed the valves and they seem to operate. put it all back togehter and it started to work for 10-15 lifts and angles then same problem??
  2. Yooper75

    Yooper75 Senior Member
    Messages: 324

    Sounds like you have ice in the bottom of the resivior. Drain the unit, take the motor off and remove it from the truck, take it inside and hang it upside down over a bucket over night. I had a similar problem on a cable operated plow quite a few years ago and that's what it took to cure the problem.
  3. twinman326

    twinman326 PlowSite.com Addict
    Messages: 1,683

    Sounds like you have a suction problem..I would do a complete system flush..Check the suction filter on the pump,and clean the filter with brake cleaner.. Clean the pump housing also out with brake cleaner. Use the "blue hydraulic" fluid when you are ready. I would also change the motor gasket..