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MM2 - plow blade not coming up

Discussion in 'Fisher Engineering Discussion' started by LTG, Jan 13, 2011.

  1. LTG

    LTG Junior Member
    Messages: 1

    Greetings... first time on this site. I have Fisher MM2 plow - 8 foot it is 6 years old. I had extreme electrical problems while plowing yesterday during the northeast blizzard. The electric motor would not stop " working " even on float. It finally starting hissing and and making a loud poping sound. I turned the ignition off and all the power in my 2006 Silverado 2500 HD - with plow package (beefed up alternator) drained. I quickly disconnected the main grill connection to the motor and the truck started up fine but reconnecting caused the same issue.

    Given the symptoms and some on line searching I figured out it was the motor relay. I purchased the " emergency repair kit" when I purchased the plow and it contained a new motor relay. I swamped it out and tested the plow and it worked perfectly. Headed out plowing again and was able to complete 1 account at 9 PM and when leaving the plow blade would not lift. I had side to side motion - but slow. Hydraulic fluid was fine, disconnected and reconnected the grill electric connections. Checked most of the electrical connections I could reach but no luck

    A fellow plow driver stopped and stated that it sounded like the electric motor was shot and did not have enough power to lift the blade. Before I purchase a new electric motor I was hoping someone on here could confirm that it is the electric motor and not something simple/obvious that I should check and fix.

    Any advice would be greatly appreciated.

    Thanks - LTG :help:
  2. Bmxdkj

    Bmxdkj Member
    Messages: 57

    It is possible that the electric motor has some burnt out brushes,. Also check and see if you have a bad cartdridge. There is a way you can bench test them to check. The Fisher website has all that information.