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  1. #1
    Gold Member
    Join Date
    Jul 2009
    Posts
    433
    Location
    Central Illinois
    Tractor
    JD 4120

    Default MX and the JD 4120

    Does anybody here run a MX6 on a 4120? I'm looking to get a new rotary mower and just can't deside on a 5 or 6.

  2. #2
    Super Member
    Join Date
    Feb 2008
    Posts
    9,194
    Location
    somewhere usa
    Tractor
    Deere 110tlb, 4520, x749, L130

    Default Re: MX and the JD 4120

    I purchased the MX6 prior to the 4520 tractor and used it behind my older 820. So I have used it with a 35 hp tractor and the 60 hp tractor. Used it a couple of times behind my 110tlb as well which has similar power as the 4120.


    All three machines handle the mower's weight without problems but obviously the 4520 can be driven faster through heavy brush and still maintain top speed.

    For your 4120 I would recomend the MX6 over the MX5 as long as you have the proper ballast this would be a good match for you.

  3. #3
    Silver Member
    Join Date
    May 2006
    Posts
    241
    Location
    Illinois
    Tractor
    4310 JD 2003

    Default Re: MX and the JD 4120

    I agree with previous poster. I have a 4310 32hp. and it cuts great. You have I thinf a wider wheel base that the MX6 should cover.

    -Mike-
    JD 4310
    Stuff, lots of stuff

  4. #4
    Gold Member
    Join Date
    Jul 2009
    Posts
    433
    Location
    Central Illinois
    Tractor
    JD 4120

    Default Re: MX and the JD 4120

    I want to move the rears out from the stock position. They are only less than 2" from the fender wells now (the closest in). I think just switching sides with the tires will put them about 2" farther out per side. FWIW, I mow with the loader on.

  5. #5
    Veteran Member
    Join Date
    Nov 2005
    Posts
    1,121

    Default Re: MX and the JD 4120

    I use a Rhino SE6 which I think is similar in size and weight to that JD mower. The 4120 has more than enough power for this mower and can cut as fast as I can safely move, even in thick stuff. You definitely want a 6-footer with that tractor as a 5 will not quite cover the width of the tractor, even with the rear wheels at the narrowest setting.

  6. #6
    Gold Member
    Join Date
    Oct 2007
    Posts
    429
    Location
    North Central Mississippi
    Tractor
    JD 5075E Cab

    Default Re: MX and the JD 4120

    I use a mx-6 on a 4320. I would definitely recommend the mx-6 over the mx-5. Just make sure you have a lot of front weights or FEL on the tractor. The MX-6 is a heavy brush cutter!

  7. #7
    Veteran Member
    Join Date
    Nov 2005
    Posts
    1,121

    Default Re: MX and the JD 4120

    I leave the loader frame on but drop the quick-release bucket (1 minute job). This totally eliminates the bounce that you get at high speed with the bucket on, greatly improves forward visibility and air flow to the radiator, compared to leaving the bucket on, and leaves the tractor ballasted just about perfect for the heavy rear mower.

  8. #8
    Gold Member
    Join Date
    Jul 2009
    Posts
    433
    Location
    Central Illinois
    Tractor
    JD 4120

    Default Re: MX and the JD 4120

    Does anybody use a HF quick hitch w/ the mx6? I have one on my ford 641 that I'm thinking about setting up on the 4120.

  9. #9
    Elite Member
    Join Date
    Aug 2004
    Posts
    3,193
    Location
    Red Oak, Texas
    Tractor
    JD 5525 and 5093e Kubota SVL75

    Default Re: MX and the JD 4120

    Quote Originally Posted by whitedogone View Post
    Does anybody here run a MX6 on a 4120? I'm looking to get a new rotary mower and just can't deside on a 5 or 6.
    MX-6 works fine on a 4120.

    D.

  10. #10
    Elite Member
    Join Date
    Jul 2006
    Posts
    3,015
    Location
    midwest
    Tractor
    JD 4520, Toolcat 5610, Bobcat S300, Case-IH 125 Pro, Case-IH 245, IH 1086, IH 806

    Default Re: MX and the JD 4120

    I easily ran a 6' mower on a JD 3000 series and now on a JD 4000 series. Definitely go with 6' on the 4000 series. You can alway mower narrower but never wider.

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