AT&SF Alco RS-2 No. 2098 built in 1949, shown here at San Diego, California.

(By Original uploader was Mr Snrub at en.wikipedia - Transferred from en.wikipedia, GFDL, https://commons.wikimedia.org/w/index.php?curid=5051586)

 

Alco logo.

ALCO DIESEL-ELECTRIC LOCOMOTIVES

List of ALCO diesel locomotive classes

The American Locomotive Company (ALCO), based in Schenectady, New York, United States produced a wide range of diesel-electric locomotives from its opening in 1901 until it ceased manufacture in 1969. This is a list of ALCO locomotive classes.

For individually notable locomotives, please see List of locomotives. There are numerous individual ALCO locomotives that are preserved in museums or heritage railways. In particular see List of preserved locomotives.

 

A 6-cylinder Alco 251 diesel is installed on a locomotive frame at Schenectady.

(American Locomotive Works, W. Lenheim Collection)

 

Boxcab locomotives

60-ton
100-ton
66-ton

 

Switchers

ALCO 300
ALCO 600
HH600
HH900
HH660
HH1000
S-1
S-2
S-3

S-4
S-5 (1951) 
S-5 (1954
S-6
SB-8/SSB-9 
T-6

 

Four-axle road switchers

RS-1
RS-2
RS-3
RS-11
RS-27 
RS-32
RS-36

 

Six-axle road switchers

RSC-1 
RSD-1 (1946) 
RSD-1 (1942-1943) 
RSD-1 (1944–1945)
RSC-2 (1946–1950) 
RSC-2 (1950)
RSC-3 
RSD-4
RSD-5 
RSD-7 (1954)
RSD-7 (1955–1956) 
RSD-12 (1956–1963)
RSD-15

 

Century series

ALCO announced its "Century Series" of diesel locomotives in 1963 as a leap forward in power and reliability, an attempt to compete more aggressively with GM-EMD and GE in the marketplace.

C415
C420
C424 
C425 
C430 
C628
C630
C636
C855 
C855B

 

Diesel-hydraulic locomotives

DH643

 

Military locomotives

MRS-1 or RSX-4