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  • Topic: How to Repair Pivot Boss on Bottom of Plastic Cars?

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    • November 11, 2017 11:27 PM EST
      • Streamwood, IL
         
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      How to Repair Pivot Boss on Bottom of Plastic Cars?

      As the title mentions, the plastic boss that sticks out on the bottom of a car that the truck mounts to. What's the best way to fix it? I had one crack in half on the bottom of a Bachmann tender.

    • November 12, 2017 5:09 AM EST
      • Ohio
         
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      I have drilled them out and used a plastic dowel before. 

    • November 12, 2017 7:20 AM EST
      • Pittsburgh, Pennsylvania
         
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      I fixed one by putting tubing over the existing pin, and then sanding it down to size.

      https://largescalecentral.com/forums/topic/24272/worn-out-lgb-boxcar

      But since yours cracked, replacing it with a plastic pin like Travis said, is probably your best option.

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    • November 12, 2017 8:02 AM EST
      • Eastern Massachusetts
         
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      Round computer mother board standoffs are great.  I have found some large ones in both plastic and metal.  These are already taped for screws!!

    • November 12, 2017 9:23 AM EST
      • Ottawa/Nepean, Ontario, Canada
         
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      The plastic wheel sets, offer a bit of help...take one apart, by removing the metal rod, then use the plastic rod part of the half wheel set as a replacement part. Just drill out the broken pin, and insert the replacement pin, after cutting it to size. Since, in most cases, the parts are "Polystyrene", you can "Weld" the pin in place with lacquer thinner, if you have used the correct sized drill, to give a snug fit.  Just proves that plastic wheel sets can have an afterlife use...!!!

    • November 12, 2017 10:50 AM EST
      • Spokane Valley, Washington St.
         
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      I've glued a tube, brass or plastic, very thin walled, over the cracked mount. Then glued very small wooden slivers in the cracked hole. Sand them off level after they have dried. Then drill a small hole in the center. Gently thread your screw in to cut new threads in the repaired hole. You will prolly have to ream the truck mounting hole to fit over your new mount. Easy Peasy fix.

    • November 12, 2017 10:53 AM EST
      • Candlewood Valley, Connecticut
         
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      Lots of good ideas here, any one of them will work for you. This is how I fixed the same problem with a T-Nut, machine screw and washer on an Aristo Classic car. Details are in this thread.

       

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    • November 12, 2017 12:53 PM EST
      • Curmudgeon at Large, Lynn Haven, FL
         
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      Fred Mills. said:

      The plastic wheel sets, offer a bit of help...take one apart, by removing the metal rod, then use the plastic rod part of the half wheel set as a replacement part. Just drill out the broken pin, and insert the replacement pin, after cutting it to size. Since, in most cases, the parts are "Polystyrene", you can "Weld" the pin in place with lacquer thinner, if you have used the correct sized drill, to give a snug fit.  Just proves that plastic wheel sets can have an afterlife use...!!!

      Interesting and resourceful solution. I will have to keep that in the tool box for future reference.

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    • November 12, 2017 6:07 PM EST
      • Streamwood, IL
         
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      Thanks Gents for the tips!  I found some superglue, clamped it with a clothespin, and redrilled the hole, but I like the use of the t-bolt, that's a great idea!

      This post was edited by Mike Wlez at November 12, 2017 6:10 PM EST
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