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  1. #1
    Silver Member
    Join Date
    Jan 2011
    Posts
    103
    Location
    Central Wisconsin
    Tractor
    '65 IH Cub Lo-Boy, '13 Kioti DK50SE HST

    Default Questions about Mott LB flail mower

    I recently bought a hammer knife mower for my Cub, it turns out it's a Mott FHC. It mows pretty well, even with dull, rusty knives:



    It doesn't fit my lo-boy very well, I can't lift it off the ground very much without the PTO shaft hitting the fast hitch cross bar, and the PTO drive line angle is way too sharp. Exactly the reasons (as I've discovered) Mott made the LB model for the lo-boy.

    In doing a little research, it looks like the only difference between the two models is the driveshaft and driveshaft tube length, and possibly the driveshaft mounting height. I think I can modify the mount so that I can convert the mower to work on either a standard Cub or a lo-boy. I would just need to make a new driveshaft, driveshaft tube, and add another mounting bracket. Shouldn't be too difficult, I think.

    Can anyone with a Mott LB share the driveshaft tube length (between flanges) and driveshaft tube centerline height? Thanks!


  2. #2
    Elite Member
    Join Date
    Sep 2008
    Posts
    3,213
    Location
    NE USA
    Tractor
    JD LA115, WH 244, WH 525 hydro-pops,Original Troy Built Horse 8 HP

    Default Re: Questions about Mott LB flail mower

    Quote Originally Posted by nj gsp View Post
    I recently bought a hammer knife mower for my Cub, it turns out it's a Mott FHC. It mows pretty well, even with dull, rusty knives:



    It doesn't fit my lo-boy very well, I can't lift it off the ground very much without the PTO shaft hitting the fast hitch cross bar, and the PTO drive line angle is way too sharp. Exactly the reasons (as I've discovered) Mott made the LB model for the lo-boy.

    In doing a little research, it looks like the only difference between the two models is the driveshaft and driveshaft tube length, and possibly the driveshaft mounting height. I think I can modify the mount so that I can convert the mower to work on either a standard Cub or a lo-boy. I would just need to make a new driveshaft, driveshaft tube, and add another mounting bracket. Shouldn't be too difficult, I think.

    Can anyone with a Mott LB share the driveshaft tube length (between flanges) and driveshaft tube centerline height? Thanks!




    About your Mott Mower; DO you really need the fast hitch cross bar when mowing-if it is the one placed between the lower links?


    The two other issues are that the rear roller is gone and the 2 side skids are missing.

    Your mower needs some work and parts. the rear roller is what sets the cutting height,
    I think some of these mowers had wheels if they were not hung under the lowboy with chains too.

  3. #3
    Silver Member
    Join Date
    Jan 2011
    Posts
    103
    Location
    Central Wisconsin
    Tractor
    '65 IH Cub Lo-Boy, '13 Kioti DK50SE HST

    Default Re: Questions about Mott LB flail mower

    The roller is there - you just can't see it in the picture. The cross bar keeps the fast hitch draw bar from twisting when the mower is raised, so I think I probably need it.

    The bearing for the idler pulley is shot, it has a few cracks in the mower body that need welding, and it has some of the worst welds on it I've ever seen that will really need to be ground out & re-welded. I can easily make a new driveshaft tube & driveshaft, at least as long as it's keyed and not a spline. I can machine a spline too, but that's a lot more complicated.

  4. #4
    Silver Member
    Join Date
    Jan 2011
    Posts
    103
    Location
    Central Wisconsin
    Tractor
    '65 IH Cub Lo-Boy, '13 Kioti DK50SE HST

    Default

    So, nobody has a Mott LB flail they can measure for me? Guess I'll have to figure it on myself!

  5. #5
    Elite Member
    Join Date
    Sep 2008
    Posts
    3,213
    Location
    NE USA
    Tractor
    JD LA115, WH 244, WH 525 hydro-pops,Original Troy Built Horse 8 HP

    Default Re: Questions about Mott LB flail mower

    Sorry I did not think of theis earlier but you could call wengers in Myerstown, PA they might have one.

  6. #6
    Silver Member
    Join Date
    Jan 2011
    Posts
    103
    Location
    Central Wisconsin
    Tractor
    '65 IH Cub Lo-Boy, '13 Kioti DK50SE HST

    Default

    I know, this is an old post, but here's an update - I pulled apart the driveline yesterday and was going to replace the input shaft oil seal, but would have had to destroy the U joint spider to get the yoke off. So I just cleaned the gear case out and packed it with high temp grease. That oil seal might not keep oil it, but it should keep grease in. Turns out the belt idler was just loose in the pulley halves, so I staked it in. The pulley shaft is a spline, so I'm going to hold off on shortening or changing it. I raised the driveline up about 4" just by bolting on a couple of steel plates. Works pretty well. I also have a small farm in Wisconsin now, so I guess I should change my user name!
    Last edited by nj gsp; 06-01-2014 at 11:09 PM.

  7. #7
    Silver Member
    Join Date
    Jan 2011
    Posts
    103
    Location
    Central Wisconsin
    Tractor
    '65 IH Cub Lo-Boy, '13 Kioti DK50SE HST

    Default

    I ordered a full set of fine cut knives with some extra clevises and cotter pins from Flailmaster - they have very reasonable prices and everything is made right here in the USA. Gotta love it!

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