This week I have another new replacement part to share with you for an N Gauge Bachmann (Graham Farish) Peppercorn A1.
These locomotives, as pictured below (Bachmann stock photo), are fairly new and therefore not a lot goes wrong with them. They are fantastic runners.
But from time to time parts can come off and get lost, and that’s what happened to this one. Where the eccentric rod connected to the bell crank Beckman have secured the rod with a plastic molded part with two pegs as shown below. These parts are opp-handed so they are different for each side.
Drawing the part is fairly simple, as I had one to copy, and I’ve joined both parts together to make them cheaper to print and keep them in pairs.
The new parts, which being transparent are very hard to photograph, came out very well and are almost identical to the original.
On the locomotive below you can see the eccentric rod hanging down. The two holes under the running board receive the pegs on the bell crank cover. The hole nearest the front of the loco pins the eccentric rod. At the end of the rod is a plate with three holes; the middle hole is oversized to allow the plate to rotate in on the pin.
With the original cover fitted, as shown below, you can see how it all fits together.
On the other side the new 3D printed part fits in the same way.
This 3D printed part has one of the pegs ever so slightly, and I mean 0.3mm, too low on the cover. This causes it to appear to be at an angle. I’ve corrected this in the model file.
Once painted with a matte acrylic black, the new cover fits right in with the locomotive.
For symmetry I changed the other side for a 3D printed part as well and again it fits right in.
Upon test running, the locomotive is as smooth as when it was new. A pair of replacement N Gauge Bachmann (Graham Farish) Peppercorn A1 bell crank covers can be found here.
Next week I’ll have another new replacement part to share with you and then it’s back to the projects in hand.