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MM2 Frame

Discussion in 'Fisher Engineering Discussion' started by 2006Sierra1500, Dec 27, 2011.

  1. 2006Sierra1500

    2006Sierra1500 PlowSite.com Addict
    Messages: 1,758

    I noticed a couple days ago, that the frames on our 2 7'6" RDs are different. One plow is a 2004, one a 2006. On the 04, the frame is shorter heightwise, which in turn makes it look wider, while the 06 is taller making it look thinner.
     
    Last edited: Dec 27, 2011
  2. RepoMan207

    RepoMan207 PlowSite Fanatic
    from Maine
    Messages: 5,031

    Don't quote me on this, but I think that's when they did away with RD models. Either way, there is 3 or 4 different configurations to the 7.5' in the MM2's alone, it's just a matter of when you bought them.
     
  3. 2006Sierra1500

    2006Sierra1500 PlowSite.com Addict
    Messages: 1,758

    They both say RD on the blade, but the Sierras plow looks more like the modern HD series plows. Thanks for the reply!
     
  4. RepoMan207

    RepoMan207 PlowSite Fanatic
    from Maine
    Messages: 5,031

    Let me guess, the smaller of the two is the oldest? The larger of the two has a headgear part number of 27454, and a A Frame part number of 27598 making up Common attachment kit 27777, which they used for all plows right up through the EzV's.

    The Smaller size has a headgear of 27742 and an A Frame of 27995 making up common attachment kit 27750-1. This setup also had the two different 7.5' blades. This setup was only used for the 6.9' & 7.5' and is now the SD model line.

    I'm going out on a limb here without measurements to confirm........the larger setup has a 25 1/8" spread between the A Frame ears, and the smaller one is 25 1/2".
     
  5. 2006Sierra1500

    2006Sierra1500 PlowSite.com Addict
    Messages: 1,758

    They both have identical blades to todays HD series plows with 3 trip springs, not the 2 with the horizontal bar on the SD. You can see the smaller plow in my avatar.
     
  6. bob00

    bob00 Senior Member
    Messages: 143

    the blade dosten relly maters it came in kit at the dealer blade in one box head gear a frame in an other and some more for the hydrolic and electric stuff dealer just match box to build your kit
     
  7. 2006Sierra1500

    2006Sierra1500 PlowSite.com Addict
    Messages: 1,758

    Actually, if you compare the SD and HD blades, they're very different.
     
  8. RepoMan207

    RepoMan207 PlowSite Fanatic
    from Maine
    Messages: 5,031

    As it should be, according to the reference guide there was 4 different 7.5 blades used for the MM2's. I'm sure some, if not all are interchangeable. 2 of them I suspect were shorter then the others.
     
    Last edited: Dec 28, 2011
  9. 2006Sierra1500

    2006Sierra1500 PlowSite.com Addict
    Messages: 1,758

    Both blades are the same height.
     
  10. 2006Sierra1500

    2006Sierra1500 PlowSite.com Addict
    Messages: 1,758

    Heres a good picture I took last year showing the blade of the older plow.

    [​IMG]