The Rolling Road to Recovery

After the challenges of wiring, and once the new decoder had been ordered, I cut the 4 pads on my soldering board to make 8 pads.  Next I soldered the wires in the tender to the pad.  They're a bit long but I can shorten them once I'm sure the plugs work as expected.  I am making this up as I go along using ideas I've seen elsewhere, tailored to fit this specific situation.

Next I decided to re-install the fireman's side valve gear.  I had left myself a note in the past on a punch list of tasks to shim the left side valve gear.  I wasn't very specific about why it needed shimming or where, so I just reinstalled it to find out.  Turns out it works great as-is.  Huh.  Maybe I fixed that issue years ago and forgot to check it off?  Or maybe it never was an issue.

Next I reinstalled the motor and put the engine on the test rollers - a tool I consider essential for working on steam engines.  Immediately the locomotive reminded me to set the angle of the eccentric, as the wheels wobbled and gahlumped.  After adjusting them the motion was indeed smoother with one major hitch in the gitalong once per revolution.  Hmm.  I'll spare you the troubleshooting thoughts; three of the teeth on the worm gear (that's the one on the axle, not the motor shaft) were chipped.  I briefly worried about finding a replacement until I remembered I had once shimmed the motor to bring the gears closer together.  That did the trick.  See the video below - this smooth low-speed running is on DC, with dry gears and joints.

Confident that the mechanism was working well I turned my attention to the male-half of the wiring.  I trimmed the pins ever so slightly to make that connection as short as possible then soldered wires to each pin.  A little heat shrink tubing and it was ready to install.  Feeding the wires through the holes in the locomotive frame wasn't as challenging as I'd expected though it did take some patient work with tweezers.  I joined the two halves of the connection and reattached the draw bar.

The thing worked well as long as you didn't want to go around any curves.  "Bending" the joint between loco and tender revealed that the friction of the holes on the loco frame was enough to pull the pins out of the sockets on the tender.  So, I tried feeding the wires through only the furthest hole on the locomotive frame, leaving slack beneath the cab.  Voila!  It works, and works well.  I trimmed away some of the loco frame, opening the second holes, and now it fits almost as if it was designed to be that way.  I'll need to leave a little slack in the wires between the motor and the backhead, but there's room for that.

 

With that established I can move on to completing the detail work on the sides of the firebox and in the cab.  That'll be the subject of the next post.