MD #9 Question

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  • May 11, 2009 at 10:18 pm #40544
    Does’ Leap
    Participant

    I purchased the “easy cut” system of guards and knives for my MD #9 mower mentioned by Don and others in the past (http://www.schumacherlc.com/). One of the modifications I need to make is to raise up the ledger plates on the beginning and end of the cutter bar. The very first knife cuts against a ledger with no guard and the last knife cuts on a ledger attached to what I think is called the rock guard. I need to come up around 3/32 of an inch. Any ideas on the best approach to raising these ledgers so that they are on the same plane as the new guards?

    George

    May 12, 2009 at 1:00 am #52301
    Mark Cowdrey
    Participant

    George,
    When I rebuilt my cutter bar I replaced the knives I believe you are referring to, located on the “inner shoe” and the “outer shoe”. Instead of using rivets to hold the knew ones in, I went to the hardware & got 28 or 32 gauge machine screws w flat heads & tapered shoulders, configured like what I know as a “stove bolt”. I put them on W self locking nuts. That way, regardless of what you use to shim (lead or aluminum flashing come to mind as possibilities), if you don’t get it the way you want it the first try, its not too big a production to make an adjustment.
    Good luck, let us know how that fancy system works!

    Mark

    May 12, 2009 at 1:11 am #52300
    ngcmcn
    Participant

    Sheet metal,vinyl siding(my personal favorite) maybe even the old ledgers with machine screw like Mark says to attach them. 3/32 is a bit.

    Did you get the flywheel off George?

    Neal, Maine.

    May 12, 2009 at 10:02 am #52303
    Does’ Leap
    Participant

    Thanks for the replies. Any tips on getting those rivets off that hold down the ledger? I can reach two of the four rivets with a grinder.

    Neal, the flywheel is off! I rapped on the pinion gear, alternating the teeth I was hitting to break it lose and was finally able to free it up with a wrench.

    George

    May 12, 2009 at 10:13 am #52305
    Donn Hewes
    Keymaster

    George, congrats on getting the fly wheel off. I am not sure which rivets you are trying to reach. It sounds like it will be a great machine when you are done. Maybe NEAPFD material? Good luck, Donn

    May 12, 2009 at 10:42 am #52302
    Mark Cowdrey
    Participant

    George,
    I went at it from the bottom. To get access you neeed to remove the height adjusting feet or skid plates or shoes or whatever they are called. Center punch the rivets and carefully drill out w incrementally bigger bits. Ideally you will just have to drill off the head or peening and then drive out the rivet shaft w a straight punch. If it is seized, you may have to drill the shaft some to relieve some pressure. be careful because I rarely manage to drill the exact center so you risk distorting your hole. I messed mine up a little & it was still OK.

    Good Luck.

    Mark

    May 13, 2009 at 10:39 am #52304
    Does’ Leap
    Participant

    Mark:

    I used the same approach and distorted a couple of holes, but I don’t think it will be too much of a problem. Both plates are off and ready for shimming!

    George

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