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  • Bent brush hog disc

    This came in today to straighten. 35" dia x 1/4" thick. One of two on the mower. Looks like fun. Tall grass and weeds with a hidden stump, snapped it clean off. New one is $900 from John Deere. Probably won't get to it for awhile but I'll follow up. I think most of the damage was after this shaft broke the other disc beat on it.
    Click image for larger version

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Views:	180
Size:	1.73 MB
ID:	611462
    Click image for larger version

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Views:	168
Size:	1.59 MB
ID:	611463
    MM250
    Trailblazer 250g
    22a feeder
    Lincoln ac/dc 225
    Victor O/A
    MM200 black face
    Whitney 30 ton hydraulic punch
    Lown 1/8x 36" power roller
    Arco roto-phase model M
    Vectrax 7x12 band saw
    Miller spectrum 875
    30a spoolgun w/wc-24
    Syncrowave 250
    RCCS-14

  • #2
    That sucker is mint! Bang on it a little bit, shoot some John Deere green paint, good as new!

    Comment


    • #3
      walk your field before mowing.............

      Comment


      • #4
        Been raining all week so catching up on shop work. First remove blades and shaft stub. The pc of shaft was stubborn. Took a few heating sessions. Next get the blade holder straight. Then start on the pan. Sliced it in two spots to make it easier to straighten. Was tougher than I thought but it's plenty good enough. Last pic is the final heating session to remove any stress.
        Click image for larger version

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Size:	1.87 MB
ID:	611545 Click image for larger version

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Size:	1.74 MB
ID:	611546 Click image for larger version

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Views:	98
Size:	1.82 MB
ID:	611547
        MM250
        Trailblazer 250g
        22a feeder
        Lincoln ac/dc 225
        Victor O/A
        MM200 black face
        Whitney 30 ton hydraulic punch
        Lown 1/8x 36" power roller
        Arco roto-phase model M
        Vectrax 7x12 band saw
        Miller spectrum 875
        30a spoolgun w/wc-24
        Syncrowave 250
        RCCS-14

        Comment


        • #5


          Click image for larger version

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Views:	112
Size:	1.51 MB
ID:	611549
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ID:	611550
          final heating/shaping I thought.
          Click image for larger version

Name:	20201029_190217.jpg
Views:	101
Size:	1.95 MB
ID:	611551
          MM250
          Trailblazer 250g
          22a feeder
          Lincoln ac/dc 225
          Victor O/A
          MM200 black face
          Whitney 30 ton hydraulic punch
          Lown 1/8x 36" power roller
          Arco roto-phase model M
          Vectrax 7x12 band saw
          Miller spectrum 875
          30a spoolgun w/wc-24
          Syncrowave 250
          RCCS-14

          Comment


          • #6
            This is the final. Had to flip it, block it up and clamp/heat the blade holder one more time. I'll do a quick blade sharpen and bolt them on, ready to go. 5-1/2 hrs.
            Click image for larger version

Name:	20201030_104041.jpg
Views:	113
Size:	1.52 MB
ID:	611553
            MM250
            Trailblazer 250g
            22a feeder
            Lincoln ac/dc 225
            Victor O/A
            MM200 black face
            Whitney 30 ton hydraulic punch
            Lown 1/8x 36" power roller
            Arco roto-phase model M
            Vectrax 7x12 band saw
            Miller spectrum 875
            30a spoolgun w/wc-24
            Syncrowave 250
            RCCS-14

            Comment


            • #7
              Very nice

              Comment


              • #8
                Heatin’ and a beatin’!

                Nice repair.

                Comment


                • #9
                  Originally posted by MMW View Post
                  ... ready to go. 5-1/2 hrs.
                  Don't get me wrong, as I'm opposed to the disposable society, but what's the cost comparison between the materials and labor on the repair versus a replacement part? Or is lack of replacement parts a greater issue?

                  Comment


                  • #10
                    The shaft broke? There should have been a shear pin to save the shaft ? Did you buy new shaft ??

                    Comment


                    • #11
                      First I was mistaken on pan thickness, it is 3/16". Next customer told me a new disc/blade holder from John Deere costs $900. I took a quick look on the interenet for one, used or after market and came up with nothing. I figured about 4 hours to do this, so I am below the 50% mark that is kind of my benchmark for repair or replace on things like this that probably won't come out like new or close to it. Didn't plan on 3/4 hour to remove the old shaft or 20 minutes to straighten one blade. Straightening just took a little bit longer. This is the only pc. the customer dropped off, he is going to get a new shaft and replace it himself, hope he can. No shear pin on the parts I have. Lastly the finished picture looks better than it really came out however it should be fully functional.
                      MM250
                      Trailblazer 250g
                      22a feeder
                      Lincoln ac/dc 225
                      Victor O/A
                      MM200 black face
                      Whitney 30 ton hydraulic punch
                      Lown 1/8x 36" power roller
                      Arco roto-phase model M
                      Vectrax 7x12 band saw
                      Miller spectrum 875
                      30a spoolgun w/wc-24
                      Syncrowave 250
                      RCCS-14

                      Comment


                      • #12
                        In retrospect since about 1/2 of the blade holder welds were cracked already I should of just cut it off and straightened it and the pan seperately, then welded them back together at the end. They kind of fought against each other while straightening plus then I could of straightened the blade holder in the press vs using heat.
                        MM250
                        Trailblazer 250g
                        22a feeder
                        Lincoln ac/dc 225
                        Victor O/A
                        MM200 black face
                        Whitney 30 ton hydraulic punch
                        Lown 1/8x 36" power roller
                        Arco roto-phase model M
                        Vectrax 7x12 band saw
                        Miller spectrum 875
                        30a spoolgun w/wc-24
                        Syncrowave 250
                        RCCS-14

                        Comment


                        • #13
                          The shear pins are usually at the gear box PTO shaft .
                          It sounds like he had used wrong grade bolt for shear pin.
                          My JD brush hog has two swinging blades. I replaced them a few years ago and are 1/2" thick.
                          Depending on bend damage, I would be concerned about balance and vibration. The blades on mine spin at 160 MPH according to manual.

                          Comment


                          • #14
                            I thought about balance vibration issues. Made sure the blade holder was even at both ends relative to center hub. Also since I didn't really add or subtract any material from the pan it should be ok plus the pan od is pretty equal to the center hub with small variations. The mower is I think 10 foot? It has two discs. Hopefully the other one is undamaged as I did not see it but I will make sure he checks it. I've seen a few of these that are being used in much worse shape than this one when I finished it so I assume it will be fine.
                            MM250
                            Trailblazer 250g
                            22a feeder
                            Lincoln ac/dc 225
                            Victor O/A
                            MM200 black face
                            Whitney 30 ton hydraulic punch
                            Lown 1/8x 36" power roller
                            Arco roto-phase model M
                            Vectrax 7x12 band saw
                            Miller spectrum 875
                            30a spoolgun w/wc-24
                            Syncrowave 250
                            RCCS-14

                            Comment


                            • #15
                              When I do a job where everything cracked and bent up ,I tell them it’s not going be perfect but I’ll get as good as I can. If you want it perfect you’ll have to get new. Most are good with that

                              Comment

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