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Trailer Cracked Frame Repair

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  • Trailer Cracked Frame Repair

    My latest welding job was to repair the cracked frame of my friendís landscape trailer. I believe that the hanger wasnít welded in the proper position on the frame, which would have allowed the shackle to be vertical in the unloaded condition. This most likely caused the high forces in the hanger, and caused it to break. Ever since the hanger broke, the eye of the spring functioned as a slipper spring and rubbed on the frame. Unfortunately the frame wasnít thick enough so the eye of the spring eventually dug a slot in the frame. Eventually the slot was deep enough for the eye of the spring to be trapped by the hook that it created in the side of the slot of the frame. When the trailer was loaded it caused the spring to lengthen, which put high forces on the hook of the slot. This caused the metal to be raised on the hook side of the slot and eventually caused the frame to crack.

    This repair should get my friend through his busy fall leaf clean up season. In the spring I would like to replace the frozen pins and weld a pipe into the frame to serve as a hanger for the shackle. This will allow the fore and aft degree of freedom that the spring requires, without raising the trailer height too much. The heavy duty axle and truck tires already make the trailer on the high side. A torsional axle might be a better solution to minimize the trailer height, as wrench bender pointed out in a previous post.

    http://www.redneck-trailer.com/2009/A/A26-A29.pdf
    Attached Files
    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport
    Miller Spectrum 375 Plasma Torch

  • #2
    More Pictures:
    Attached Files
    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport
    Miller Spectrum 375 Plasma Torch

    Comment


    • #3
      Having a 200 dx why not stick weld this with 7018-3/32 seems like it would have been easier/faster then tigging that frame.Don,t know if those sharp corners on your reinforcing plates was a good idea also?Just my opinion,everyone does things different.
      BB402D
      TB300D
      DIMENSION652
      MM250X
      MAXSTAR140
      S-32 FEEDER W/1260 IRONMATE FC/GUN
      HT/PWR-MAX1250 PLASMA

      Comment


      • #4
        Originally posted by Don52 View Post
        More Pictures:
        Nice repair!
        I certainly don't expect this one to break again.
        Maybe somewhere else, but not at the repair
        pg
        Dynasty 200 DX_set up on 3 phase
        Coolmate 3
        MM 251 w/ Spoolmatic 30A
        HTP 625 Micro Cut Plasma Cutter
        Victor O/A Rig
        Bridgeport Mill_3 phase (w/ Acu-Rite 4 axis DRO)
        10 inch South Bend Lathe_3 phase
        Baldor Double Cup Tool Grinder_3 phase
        Baldor 10 inch Buffer
        Rockwell 12 inch Disc Sander
        Cyclone 2ft X 3ft Bead Blast Cabinet
        Quincy 325 2stg- Air Compressor_3 phase
        Graymills Built-in Parts Washer
        Rockwell/Delta Planer, HD Shaper, Uni-Saw etc.

        Comment


        • #5
          Originally posted by admweld View Post
          Having a 200 dx why not stick weld this with 7018-3/32 seems like it would have been easier/faster then tigging that frame.
          The frame is only 1/16 inch thick and I have better control with TIG. Plus I didn't want to get sparks on me as I was lying on my back under the frame to weld the horizontal, vertical, and overhead weld positions. It did take me a long time to weld it -- Stick would have been faster.

          Don,t know if those sharp corners on your reinforcing plates was a good idea also?
          You are right I should have chamfered or used a radius on the corners to reduce the stress concentration.

          I appreciate you taking the time to comment.

          Don
          Miller Thunderbolt
          Smith Oxyacetylene Torch
          Miller Dynasty 200DX
          Lincoln SP-250 MIG Welder
          Clausing/Coldchester 15" Lathe
          16" DuAll Saw
          15" Drill Press
          7" x 9" Swivel Head Horizontal Band Saw
          20 Ton Arbor Press
          Bridgeport
          Miller Spectrum 375 Plasma Torch

          Comment


          • #6
            Originally posted by piniongear View Post
            Nice repair!
            I certainly don't expect this one to break again.
            Maybe somewhere else, but not at the repair
            pg
            I agree that it most likely won't fail where I welded it. For my last repair I painted the entire outside of the trailer with the Rustoleum conversion coating and then a glossy black top coat. It held up very well. In some of the pictures you can see some rust on that inside of the frame. I think that I will paint it in the spring to stop this failure mode.

            Thanks for your comments,
            Don
            Miller Thunderbolt
            Smith Oxyacetylene Torch
            Miller Dynasty 200DX
            Lincoln SP-250 MIG Welder
            Clausing/Coldchester 15" Lathe
            16" DuAll Saw
            15" Drill Press
            7" x 9" Swivel Head Horizontal Band Saw
            20 Ton Arbor Press
            Bridgeport
            Miller Spectrum 375 Plasma Torch

            Comment


            • #7
              Originally posted by Don52 View Post
              I agree that it most likely won't fail where I welded it. For my last repair I painted the entire outside of the trailer with the Rustoleum conversion coating and then a glossy black top coat. It held up very well. In some of the pictures you can see some rust on that inside of the frame. I think that I will paint it in the spring to stop this failure mode.

              Thanks for your comments,
              Don
              Yes sir, I like it!
              With a thickness of only .0625, using the DX200 Tig was the thing to do in my opinion.
              It sure made a nice clean repair.
              pg
              Dynasty 200 DX_set up on 3 phase
              Coolmate 3
              MM 251 w/ Spoolmatic 30A
              HTP 625 Micro Cut Plasma Cutter
              Victor O/A Rig
              Bridgeport Mill_3 phase (w/ Acu-Rite 4 axis DRO)
              10 inch South Bend Lathe_3 phase
              Baldor Double Cup Tool Grinder_3 phase
              Baldor 10 inch Buffer
              Rockwell 12 inch Disc Sander
              Cyclone 2ft X 3ft Bead Blast Cabinet
              Quincy 325 2stg- Air Compressor_3 phase
              Graymills Built-in Parts Washer
              Rockwell/Delta Planer, HD Shaper, Uni-Saw etc.

              Comment


              • #8
                In some of the pictures you can see some rust on that inside of the frame. I think that I will paint it in the spring to stop this failure mode .
                Too good,,,,, especially since it looks like the operator just kept driving this long after an obvious problem developed.

                Comment


                • #9
                  Originally posted by Sberry View Post
                  Too good,,,,, especially since it looks like the operator just kept driving this long after an obvious problem developed.
                  You are correct. I brought the formation of the slot to my friends attention several years ago, and suggested that we fix it. We only observed the formation of the crack about three weeks before I repaired it. Once the crack formed it really took off. The frame was entirely cracked on both sides and 25% across the top. There was very little holding the frame together! Once the slot got deep enough the spring must have applied a huge force to the frame to crack it so quickly.

                  Don
                  Miller Thunderbolt
                  Smith Oxyacetylene Torch
                  Miller Dynasty 200DX
                  Lincoln SP-250 MIG Welder
                  Clausing/Coldchester 15" Lathe
                  16" DuAll Saw
                  15" Drill Press
                  7" x 9" Swivel Head Horizontal Band Saw
                  20 Ton Arbor Press
                  Bridgeport
                  Miller Spectrum 375 Plasma Torch

                  Comment


                  • #10
                    Your friend must have a Guardian Angel

                    www.facebook.com/outbackaluminumwelding
                    Miller Dynasty 700...OH YEA BABY!!
                    MM 350P...PULSE SPRAYIN' MONSTER
                    Miller Dynasty 280 with AC independent expansion card
                    Miller Dynasty 200 DX "Blue Lightning"

                    Miller Bobcat 225 NT (what I began my present Biz with!)
                    Miller 30-A Spoolgun
                    Miller WC-115-A
                    Miller Spectrum 300
                    Miller 225 Thunderbolt (my first machine bought new 1980)
                    Miller Digital Elite Titanium 9400

                    Comment


                    • #11
                      Gardian Angel is right!!

                      Someone lost a small trailer on I85 here in SC a month ago while towing it. Killed 2.

                      http://www.independentmail.com/news/...derson-county/

                      While looking up that story, there were pages after pages on the web of the same thing.

                      Prompted me to have a good look at my boat trailer. I need to add a safety chain from the winch to the boat.

                      Oh nice repair!!!!

                      Comment


                      • #12
                        I checked out your link. Loose trailers can be a real hazard!

                        For this cracked frame, the trailer would still stay together even with the frame completely cracked because the crack is behind the rear spring support and the wood of the trailer would have held it together. I made the time time to repair it because once the frame crack went completely through the ends of the tube would bang together and make the repair a lot more difficult.

                        Last year I was more concerned with the hitch falling off, but fortunately my friend replaced his tow vehicle and the hitch this past spring. See more on the hitch below:

                        http://www.millerwelds.com/resources...ighlight=hitch
                        Miller Thunderbolt
                        Smith Oxyacetylene Torch
                        Miller Dynasty 200DX
                        Lincoln SP-250 MIG Welder
                        Clausing/Coldchester 15" Lathe
                        16" DuAll Saw
                        15" Drill Press
                        7" x 9" Swivel Head Horizontal Band Saw
                        20 Ton Arbor Press
                        Bridgeport
                        Miller Spectrum 375 Plasma Torch

                        Comment


                        • #13
                          Nice repair don. I see you are from MI, I am also. Howell. There are far more trailers driving around in this sort of condition than people know. I have a friend with a lawn service with a 28" enclosed R&R, and we have fixed it more times than I can count. It was pretty much broken in half a couple times. Thankfully, he just finally retired it. I looked at your other thread about the trailer hitch. Salt is **** on things here in MI, especially vehicle frames and trailer hitches. I had a 95 E-150 van, and it had a class 3 hitch on it that was paper thin by the time I got rid of it. I think they use the cheapest garbage chineese steel on these hitches, those step bars and grille guards for pickup trucks. How many of those step bars have you see where all that is left is the curved part and the bracket that bolts to the frame?!

                          Rudy
                          T-4 Paraplegic, Runnin' the Pedal With my elbow, now trying to get used to a momentary switch.......

                          Journeyman Millwright, Local 1102, Detroit, Michigan (Disabled)

                          Syncrowave 200
                          Coolmate 1

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