ALCO T-6

The Alco T6 is a diesel-electric switcher locomotive rated at, that rides on two-axle trucks, having a B-B wheel arrangement.
The 'T' stands for 'Transfer', meaning this locomotive is capable of faster transition and higher sustained speeds than the regular 'S' - type yard switcher series. A major difference underlying this shift is the use of the heavier GE 752 traction motors, as used on road locomotives, in place of the GE 731 traction motors used on nearly all Alco's preceding switchers. The 752 motors give the T-6 a very substantial increase in continuous tractive effort, which greatly improved its slow-speed lugging performance.
The T-6 was the last series of locomotives built by Alco. The last T-6 built in 1969, the same year that the company had left the locomotive business. This last locomotive is Newburgh and [South Shore Railroad|Newburgh and South Shore] #1017 which survives today in operation on the West Michigan Railroad.

Survivors

The Delaware Coast Line Railroad, the Ohio Central Railroad System and the Arkansas and Missouri Railroad operate the T-6. Ohio Central's T-6 is unique because it was the only one built with Hi-Ad trucks. 14 T-6's survive in all.
Pennsylvania RR 8427 survives as Georges Creek Railway 101. It was that railroad's first locomotive acquisition and is often used to switch the NewPage paper mill at Luke, Maryland.
Newburg and South Shore Railroad 1017 survives on the West Michigan Railroad.
Newburg and South Shore Railroad 1016 survives as Middletown and Hummelstown Railroad 1016.
Norfolk and Western Railway #40 survives as a static display in the Virginia Museum of Transportation. It has been restored to Chesapeake and Western #10 paint.
Norfolk and Western Railway #41 is operated by the Roanoke Chapter, NRHS. It has been restored to Norfolk and Western lettering and makes operating appearances at the Virginia Museum of Transportation.