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Getting the old Bearing out

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  • Getting the old Bearing out

    The problem. Have a two cylinder air compressor that has eaten the rear bearing. Needel bearing in a blind hole at the back of the crank case. No way to get any kind of puller in.
    The solution. Heat some grease you have on hand and fill bearing with grease. Take a brass rod and hit with BFH. Grease just gets expelled between bar and old bearing shell. Machine rod to tight fit to shell. Don't want to stink up the shop more heating grease again. Fill with heavist oil I have hit with BFH again. Oil squrts out between rod and bearing shell.
    Takd break have dinner ponder what do I have that will deform when I hit it with the BFH but is thick enought not to just squrt out.
    Light bulb comes on. I have modeling clay that I have been using when making molds for lost wax patterns.

    Heat up a lump of clay in my hands till soft, form a plug and set it in the hole. Place brass bar in place and hit with BFH hit again, and again. Take a look and it is moving the bearing shell up out of the hole. Add some more clay and keep hitting. Shell come out of hole. YES

    Here are some photos after the fact.

    Dave






  • #2
    Great solution to th problem. Did you get all the clay out after?
    Thanks for sharing this idea.
    Dave

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    • #3
      well done, a cunning plan sir, so cunning you could put a tail on it and call it a weasel
      mark

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      • #4
        To quote our friends from down under, "Good on you mate"!



        Dave

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        • #5
          Thanks guys

          Yes because there was oil and grease remains in to hole the clay could not stick to anything. I took a piece of flat stock and shoved it down into the remaining clay, gave it a twist and out it came.
          The whole repair of the compressor was pending on getting the old bearing out of the hole. Now I can proceed.

          Dave

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          • #6
            Just curious Dave, but why did you heat the grease? I've always used the stiffest stuff I could find and did the job cold.

            Gordon
            Southwest Utah

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            • #7
              Gordon

              My thought was that if I heat the grease then I can pour it into the hole and have a minumum of air. The grease I had on hand was way to thin.

              Dave

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              • #8
                Good idea. Never had much luck with the grease trick myself. Surprised that anyone here would admit to owning much less using a BFH though.

                Comment


                • #9
                  Clay was a great idea! I'll have to put that in my memory banks in case I ever need it. Using grease works well when removing pilot bearings when you change a clutch. That's one I have done. But clay? Good thinking.

                  Comment


                  • #10
                    If one can get at it, just run a couple of beads of weld inside the old bearing outer race and it will shrink enough to be easily removed.

                    Comment


                    • #11
                      That was good thinking to hydraulically remove the bearing. I had the same problem on my old Campbell Hausfeld compressor. Torrington bearings in a blind hole can be tricky to remove especially after you chip away the rim. I made a T bolt that just fit inside the bearing and tigged a blob on each end and slide hammered it out. The only problem with your method is you have to be careful you don't poke a hole through the casting when your pounding the rod.

                      JL....................

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                      • #12
                        In a pinch creamy peanut butter works about as well as the clay does.
                        James

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                        • #13
                          Originally posted by x39
                          If one can get at it, just run a couple of beads of weld inside the old bearing outer race and it will shrink enough to be easily removed.
                          I've not heard that one before. Thanks for sharing!


                          I use cold grease all the time. In fact, every time I load the grease gun again, I keep the old spent tubes. There's usually a dab of grease left over. I wipe it out with my finger and glob it in a tin cup. This is the grease I use to remove bearings. Yes, I am a cheap, tight-fisted b*stard.

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                          • #14
                            out of curiosity i put a pressure guage on a greasegun, i got 9000psi!
                            mark

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                            • #15
                              Originally posted by Fasttrack
                              I've not heard that one before. Thanks for sharing!
                              My pleasure! Works good, I learned it from an old farmer down the road from me.

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