Failure to Lift
Last night bill and I began loading up the trailer to take the Mikado out to the track for it's first fire up. We moved the Crab and it's trainset over to another track in the trailer so the Mike could be in the center. Using the lift, we brought the tender out of the basement. Both Bill and I rode up with the tender. The new lally column supports at the base kept the chains nice and tight during the lift; it was the quietest I've heard the lift operate since building it.
We put the big Mikado on the stand and started lifting it. The motor barely changed pitch as it picked it up and kept going. The chains kept taut, and quiet. Bill and I stepped onto the lifting stand along with the Mike and leaned on the engine for the 10 minute ride. Half way up the motor stalls without warning. Just stopped moving. No thumps, bangs or squeals. Climbing down and checking the motor, worm drive and chain/sprockets out, we could find nothing wrong. Not even hot.
I took a 30" Stilsen wrench and grabbing on the #1 screw sprockets started rotating the drive down. It was hard to turn, even with all the leverage the large pipe wrench afforded. A dozen turns later I had backed the screws down enough to reveal the culprit: Seized lifting nut on #1 screw.
After some more oil and backing things down by hand; we hooked the motor back up and it was able to lower everything back down again. On the way down, the damaged nut continued to scrape and peel metal off the screw.
Only the one screw had this issue. The others look good. We'll have to replace the nut and screw, which will take some time to procure and fabricate. So the big Mikado will be in the basement a while longer.

