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mm 2 will lift for a bit then stop all together

Discussion in 'Truck & Equipment Repair' started by gskate6, Feb 17, 2015.

  1. gskate6

    gskate6 Junior Member
    from Mass
    Messages: 2

    mm2 will lift for a while when in use but then get sluggish and stop all together. Have replaced, plow motor, valve body, valves, solenoid, wiring harness to motor both truck side and plow side. Also replaces both batteries and altinator on truck. Plow lights will dim when the plow is under power. Seems to angle left and right fine. All connections have been wire brushed and cleaned as well. I just don't know what to do at this point, have been fighting with this for over a week. :mad: Help!!! Thanks!!!
  2. kimber750

    kimber750 PlowSite Veteran
    Messages: 4,681

    Pressure test.
  3. gskate6

    gskate6 Junior Member
    from Mass
    Messages: 2

    how would I do a pressure test?
  4. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,400

    Why bother with a psi test at this point. Just replace the pump, he already replaced everything else. So what's throwing more darts at the board at this point.
  5. H.M.R

    H.M.R Junior Member
    Messages: 15

    Sounds like it may have a short on the ground. How is the 2 pin plug?
  6. gtmustang00

    gtmustang00 Senior Member
    from Berlin
    Messages: 752

    If it angles side to side great but struggles lifting it probably needs a pump. Pressure test the system first. Should be 1800-2000 give or take.