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Head gear doesn`t fully retract.

Discussion in 'Fisher Engineering Discussion' started by danno, Oct 20, 2005.

  1. danno

    danno Senior Member
    Messages: 401

    I have the 7 1/2 MM 1 (SEPH). I rigged up a spring, similar to the newer MMs where it would pull the headgear down after the weight of the plow is grounded. After the service was done, it doesn`t do it anymore. I called them and said its an adjustment, to bring it in.

    Where is the adjustment, and what do I do to do it myself ?
     
  2. danno

    danno Senior Member
    Messages: 401

    Anybody have a Fisher plow ?
     
  3. Frozen001

    Frozen001 Senior Member
    from Rome NY
    Messages: 908

    When the plow was serviced did the over tighten the packing nut on the lift cylinder???
     
  4. danno

    danno Senior Member
    Messages: 401

    Yeah, I know thats possible. Is that the only adjustment there is ?
     
  5. alamarc

    alamarc Member
    Messages: 67

    Yeah im gonna say that its the packing nut also-- what did they service?

    Just wondering if that was something that they handled when they serviced it.


    I was looking into doing the same thing with my father-in-laws old mm1. Do you have a pictures of how you set it all up? I just cant find a heavy duty enough spring for the job yet.

    Thanks email me if you want alamarche325@hotmail.com
    andrew
     
  6. danno

    danno Senior Member
    Messages: 401

    They changed the oil and a general inspection. Nothing that needed repair.

    The spring I used is from a trampoline. It looks like the same size as the new MMs use.

    The way I did it was bought plastic coated cable and ran it across between the A-frame where there`s holes already drilled next to the chain U-bolt.

    Using u-bolts, I ran a cable up to the head gear and used another U-bolt. Very easy.
     
  7. Arc Burn

    Arc Burn PlowSite.com Addict
    Messages: 1,138

    The cylinders used in the new MM's are "low friction",the packing nuts and seals are a little different from the old SEHP.The best you can do is loosen your packing nut and wipe it down with hyrdo fluid and snug it back up, a spring will not last long on that set-up.
     
  8. danno

    danno Senior Member
    Messages: 401

    It worked pretty good last year. As far as adjusting it, that would be the only spot that it can be adjusted ? If so, what`s the amount you should turn it at a time ?
     
  9. Arc Burn

    Arc Burn PlowSite.com Addict
    Messages: 1,138

    It's not really an adjustment per say but typically,run it down hand tight then another quarter turn with a wrench and check for excessive leakage as a small amount will be normal to lube the packings.
     
  10. danno

    danno Senior Member
    Messages: 401

    Thanks Arc Burn ;)