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  • Case front axle

    I have to re-fit the king pin bore on a 1972 Case 580 back hoe / loader front axle. It's an interesting design with needle roller bearings top and bottom that press into the bore on the end of the axle and the king pin rides directly on the roller bearings. This bore that holds the bearings is actually a machined tube that's welded onto the end of the axle. I want to cut this tube off the end of the axle, weld up the worn bearing bores, re bore them on my lathe and then re-weld the tube back onto the end of the axle. How do I tell what the axle and tube are made of to determine what rod to use to weld it back together? I called a Case dealer and nobody knew what kind of steel was used in manufacturing. Actually the people I talked to were as dumb as a bag of rocks.

    Bob H
    Michigan
    Equipment:
    Trailblazer 301G
    HF251D-1 Hi-Freq
    Dynasty 300DX
    Coolmate 3
    RCCS Hand control
    Spoolmatic 30A
    Hypertherm Powermax 600
    And sadly, a Lincoln SP-100 Mig
    (soon to be replaced!)

    Advice from Mark Twain: It is better to keep your mouth shut and appear stupid than to open it and remove all doubt.

  • #2
    Friend of mine with a general machine shop redoes axles sometimes. He bores them on his mill so he doesn't have to cut them apart. Has to use a forklift and overhead hoist when working on them because they are so heavy.

    I can see why you would want to know what metal to use. Lot of liability there! Backhoe going down the road 30MPH and the part you had welded on came apart might kill a few people when the front tire and spindle took off.

    I too, have ran into that problem when talking to dealerships. They would just rather sell you a new one.

    Good luck in figuring that out.

    Ken
    Click on the sig photo
    sigpic
    An Automotive Machine Shop

    Comment


    • #3
      I would use pre heat with 7018. Keep in mind that too much heat can affect the machined bores.
      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


      • #4
        Thanks for the input guys. What I'm concerned about is that the front axle might be made out of the same stuff as the back hoe booms that have "DO NOT WELD" embossed on them. Nodular iron? Unweldable in the field? What's that all about?

        Bob H
        Michigan
        Equipment:
        Trailblazer 301G
        HF251D-1 Hi-Freq
        Dynasty 300DX
        Coolmate 3
        RCCS Hand control
        Spoolmatic 30A
        Hypertherm Powermax 600
        And sadly, a Lincoln SP-100 Mig
        (soon to be replaced!)

        Advice from Mark Twain: It is better to keep your mouth shut and appear stupid than to open it and remove all doubt.

        Comment


        • #5
          I would line boring in place.
          Chad
          -----------
          Trailblazer 302
          Suitcase 12 RC
          S22P-12 Feeder
          HF-251-2
          Spoolmatic 30A
          Maxstar 200 DX
          Shopmaster 300
          S-22A Feeder
          Coolmate 3
          Trailblazer 250G

          Comment


          • #6
            weld and line bore in place or on a milling machine.

            Comment


            • #7
              Study up on the grind test, sparks will get you close to your material.

              John
              John


              Millermatic DVI
              Millermatic 375 xtreme
              And a brand new Syncro 200!!!

              Comment


              • #8
                In the original post you said it was a machined tube that was welded on. I would assume then that this can be cut off & then welded back on. Just my opinion.
                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


                • #9
                  If you are going to weld on the bore to resize it anyway then why not weld the tube back on? If you don't want to weld on it at all then remove axle & bore it oversize. Then machine bushings for a slight press fit & install with lock tight & reassemble.
                  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


                  • #10
                    1972? You just may well have a FIGMO part. I gotta make one. Weld it up and turn it down, either way If you weld it as good as they did, in the year 2044 you can do it again.

                    Comment

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