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I just purchased an expensive but "used" engine from a leading seller, who shall remain nameless.

Upon opening the box, first a small screw fell out, not a good sign!. Next, I noticed no brass bell, just a cable that was still looped thru two supports. Further, I discovered another small plastic part. I might add that none of this was mentioned in engine description.

Inside a small bag was the front coupler, a spare tire and low and behold the bell. The bell had the yoke/clapper inserted. However, each end of the yoke was broken so the bell could not be positioned between the support arms on the engine body.

The yoke is tiny and easy to break. The other small part turns out to be the lever for the cable.

So I went to Lionel Parts, it's new and improved.  Of course , any small part that is easy to break is and was "OUT-OF-STOCK. It's a $2.00 item so why stock them! In fact, almost all of the bells and yokes were Out-of-stock.  BUT there was a picture of the the one I needed listed. That's a score!

I opened Rhino 7, imported the picture and designed the yoke, clapper and lever. Since I have most of the broken yoke,  I used my digital caliper ( everyone who wants a detailed part made, should have digital caliper) to measure the parts I had to recreate within .001" .

Picture in Lionel Parts:

bell yoke

Using Picture and the broken parts to design a replacement

3D bell yoke

this is 3D print view.

bell yoke in Pre

For a $2.00 part that Lionel has little incentive to stock, Lionel should just attach a 3D (.stl) print file to the parts list.  Then I could make them for any of you.

I know,  fat chance!!

Attachments

Images (3)
  • bell yoke
  • 3D bell yoke
  • bell yoke in Pre
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@AlanRail posted:


For a $2.00 part that Lionel has little incentive to stock, Lionel should just attach a 3D (.stl) print file to the parts list.  Then I could make them for any of you.

I know,  fat chance!!

It's not a bad idea. Lionel should consider hiring you to print the parts! haha

Great job as usual though! My FDM will never touch something like that. It's so impressive what the resin printers can do! Great stuff!

I've had this on my mind ever since I acquired a starter-set Black Cave Flyer 0-4-0 (6-8212) that was missing its boiler front and drawbar, plus a broken siderod guide. This was an oddball MPC-era steamer that only ever appeared in three sets, the ultra-cheapo (i.e. plastic drivers) Workin' on the Railroad, the Rock Island Line (significantly better with a Pullmor motor), and the Black Cave Flyer (cheapened again with a DC-only drive)

I considered duplicating one of my good boiler fronts from a 6-8601 (the same engine) using silicon rubber molds, but it turns out this part, 8300-40 might be available through someone on the Forum (this was from a 2016 post, so my milage may vary)

I have, however always puzzled over the siderod guide, which attaches to the front of the motor unit and also holds down the front half of the boiler, and is nowhere to be found on any parts list (I got this from an ancient Spanish Ebay listing) :

600-8601-070

I do have digital calipers and a rudimentary knowledge of SketchUp Make, a cut-down free version of a $600-ish 3D application from which I've seen people create files exportable to 3D printer compatible formats, so maybe building a 3D model from my one good example is an option for at least that part, since its structure really does need some beefing-up in certain areas, most notably the siderod supports.

---PCJ

Attachments

Images (1)
  • 600-8601-070
Last edited by RailRide

here is a completed print of several Bell yokes; note this was printed using mini-rafts;

didn't need the full raft as shown above.

Bell yoke group

Close up showing lever with hole from pull wire.

bell yoke group 2

yoke attached to BELL

Bell yoke side 1

better view of lever with hole and clapper

Bell yoke side lever

just have to paint yoke  black

insert into bell and

place on bell support arms attached to the engine. DING_DING!

Attachments

Images (4)
  • Bell yoke group
  • bell yoke group 2
  • Bell yoke side 1
  • Bell yoke side lever
Last edited by AlanRail

Alan,

I believe that 3D printing can offer a potential solution for improved coupling of the new Lionel Acela cars. In the current design, an eyeglass-size screw holds the train together starting from the lead engine. As reported in this forum, some screws have either been coming loose or stripping. Seems to me a very smart 3D modeler can create a small coupling piece using a more substantial screw and hosted into a strong, metallic-like material. Just a thought.

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