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mm2 grinding noise

Discussion in 'Fisher Engineering Discussion' started by CAT420, Feb 21, 2010.

  1. CAT420

    CAT420 Senior Member
    Messages: 182

    I am not sure what year mm2 it is. its an 8 foot hd. Its a company truck i plow with. My boss has replaced everything with the motor and pump except the block. Lifting and angling left to right it makes a horrible grinding noise in the pump you can hear it over the diesel engine and radio going clearly. It still lifts fine and functions normally just a horrible noise and im sure it cant be ok. any suggestions?
  2. cubicinches

    cubicinches PlowSite.com Addict
    Messages: 1,415

    If the bushing (they call it a bearing sleeve) in the valve block that the motor shaft goes into is worn, the motor will sound horrible. They sell a kit with the tool to pull the old one out and install the new one.


    See page six. Item #39.
  3. DeereFarmer

    DeereFarmer PlowSite Veteran
    Messages: 3,296

    Also check to make sure the shaft itself isn't rusted up. Mine was making a whirling and loud grinding noise earlier this year and the shaft in the motor was rusted out really bad.