They have the 12 banger…
http://www.thedieselshop.us/PTRR.HTML
is a list of the locomotives, and what frames they were built on.
So far, they have been pretty good locomotives.
On their 10th year, and entering a rebuild/overhaul program here…in a lot of cases, the diesel is pulled out, refurbished and re-installed…while the prime mover is out, they are cleaning and inspecting all other system, replacing worn wires, ducts and such, repainting all the interiors in the long hood and the cab.
For what we do with them, they have held up quite nicely…because the majority of our work is flat switching and industry, they get pretty banged up, but they seem up to the task.
The only major failures have been a head on collision with a loaded grain train, which bent the frame beyond repair, and the 9601 got speared by a piece of drill stem(pipe) that rolled off the top of a gondola in the next track, and stabbed the locomotive as it was passing by.
Managed to go through the cab floor under the engineers seat, the A/C unit, then the back wall, alternator and out the other side by ten feet.
The head on was sent back to Bosie(MK) for a new frame, they swapped all the rest, cab, long hood, diesel and alternator over, and it was back in service within a year.
The 9601 was repaired here, at our shop, after a lot of photos were taken!
Ed