The New York, Ontario & Western Railroad took delivery of four (road
numbers 401 through 404) 4-8-2s from the American Locomotive Company in
1922. These locomotives were designated as Class Y and had 27 x 28
cylinders, 69" drivers, a 200 psi boiler pressure, a tractive effort of
50,300 lbs and each weighed 317,000 pounds.
Another six "Mountains" (road numbers 405 through 410) followed from ALCO in 1923.
They were designated as Class Y-1 and were essentially duplicates of
the four Class Ys.
In 1929, ten more 4-8-2s were delivered from ALCO that were designated
as Class Y-2 and assigned road numbers 451 through 460. These
locomotives had 27 x 30 cylinders, 69" drivers, a 225 psi boiler
pressure, a tractive effort of 60,620 lbs and each weighed 360,000
The original Mountains had short tenders. The photo of 403 below shows it
with the tender of an ex X class 2-10-2 locomotive. The 2-10-2s were scrapped
because they were hard to maintain and hard to run -- they required two
firemen. Instead of getting rid of the 2-10-2 tenders, the mountain type
inherited the X's tenders and the mountain tenders went to a number of W
class 2-8-0 locomotives. The 2-8-0s were remodeled with air pumps and many
other things and were called W-2 class locomotives.
There are no surviving NYO&W "Mountains".
Class Y-2 (Locobase 218)
Data from 1930 Locomotive Cyclopedia tables. See William D. Edson's roster in Railroad History Bulletin 175 for builder's numbers. (Thanks to Chris Hohl for providing valve gear ID.) The class was built as a single batch from 67986-67995 in July 1929.)
These were the only new locomotives the NYO&W bought during its last few decades of operation. They were identical to the New York Central's L-2s and possessed a similar "superpower" boiler layout featuring the Type E superheater.
Five (452, 454-455, 459-460) were sold to the Bangor & Aroostook in June 1945 as class M-2, but they barely outlasted the five that were scrapped by the NYO&W in 1947-1948.
Class Y/Y-1 (Locobase 9010)
Data from NYO&W 1 - 1943 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. (Thanks to Chris Hohl for his 11 November 2012 email querying the proper class ID for these two batches.) Works numbers were 63254-63257 (four Y in May 1922) and 64735-67740 in October 1923.
Compared to other Mountains of the time, these were relatively small and light engines. Still they were modern power and equipped with a generous amount of superheater surface.
In June 1945, when the NYO & W was beginning to dieselize, it sold five of the class (401, 404, 406-407, and 409) to the Savannah & Atlanta as that railroad's 445-449. 410 was scrapped in February 1947 and the others went in April and August 1948.