There is a manual on the Lionel support site (it's a bit of a poor scan, but it has the info).
The answer seems to be yes, though you have to re-wire it yourself, there is not a simple switch or anything like that included. Scroll down to page 4, near the end.
Thanks Dave. Are these cars 15" long ?
I'm afraid I don't know for sure (while I've seen/played with these at some point, I don't have a set here with me to check), but being they were from 1992 or so, that seems likely.
Larger 18" passenger cars came about later from Lionel, to the best of my knowledge. I'm not sure if even the TMCC versions of MU's that were referenced above were 15" or 18". Did Lionel ever make 18" MU's?
I have the SP single unit version that I recall buying a pair of them from JC Penney when they closed them out, but that was around early 2003, so probably the same as the other TMCC ones (like the set Dick mentioned), but not sure if it would be the same as the 1992 ones in PRR and Lackawanna.
I simply looked up the number you asked for. POTRZBE indicates they work OK on O31, so that was your main concern, right?