25/05/2026
O Scale brass repair. Sometimes, it just is.
With certain brass (and not much of it left circulating) I'm not taking a shortcut to save you 30c, I'm not your repairer.
Point in case, O Scale PSC AC-5. This is a larger job than many, granted.
First step in any repair I do is always disassemble to the frame, no exceptions. This came to me "with a funny knocking sound" (we know what that means)...
A complete replacement set of gears is the first job. One set is cracked, the rest were made at the same time, and won't be far behind. To get the gearbox/combined tower off the front engine, you must press the gearbox axle (and one wheel) off the gearbox to release out of the frame, it can't be removed by just unscrewing the cover plate (I think this catches many out, and why the idler is never replaced). There is risk in moving an axle pressed in place for 30 or 40 odd Years, if I break wheel centres or whatever, it's on me to find replacement, it's not happening. The risk isn't free of charge.
Every single solder join is inspected, and redone where necessary, in this case, I will be re-doing almost every one. PSC used minimal solder in a lot of spots, these models have movable hatches and doors and typically the hinges fail first. These repairs must be done now, you (I) don't want to find a loose part after the first paint goes down. Too many times over many Years I have seen brass partly repaired, pretty obvious a part did come loose at some point only to be glued back on, no thanks and not here. I warrant my work for for as long as the piece stays with the owner at the time of repair (that maybe 20+Yrs and also I need to remain vertical, of course), no one else I know of offers this.
Like alot of brass, the model has a clear protective coat, this must come off prior to any brass repair. I can already see previous solder attempts through the clear varnish, it just doesn't work.
The steps are many with an enormous inventory of parts to go with it. The four bags pictured are about half the total hardware. We haven't even gone near the tender yet, along with new motor, electronics, full lighting including the monkey porch light, custom decals, 3D printed crew...
It's been really great. I appreciate you following and looking at the photos and hopefully you pick up an idea or tip to use in your own work, that's tops. I often show these repairs to help customers (both existing and new) to understand why a repair costs as much as it does.
Muchas gracias.
Best,
Jurgen