List of ALCO diesel locomotives

The American Locomotive Company (ALCO) produced a wide range of diesel locomotives until it ceased manufacture in 1969. This list is broken out of the main article to prevent it growing unwieldy.

Table of contents

1 Early switchers (HH series)
2 Later switchers (S series)
3 Early roadswitchers (RS, RSC, RSD series)

3.1 RS series (B-B)
3.2 RSC series (A1A-A1A)
3.3 RSD series (C-C)

4 Cab units
5 Century series

5.4 4-axle units
5.5 6-axle units

6 8-axle units
7 Miscellaneous

Early switchers (HH series)

HH600

Later switchers (S series)

S-1 and S-3 (identical but for trucks)
S-2 and S-4 (identical but for trucks)

Early roadswitchers (RS, RSC, RSD series)

RSC series (A1A-A1A)

RSC-1
RSC-2
RSC-3

RSD series (C-C)

RSD-1
RSD-4
RSD-5
RSD-7

Cab units

DL-109 - early A1A-A1A primarily passenger locomotives
FA - (FA-1,2,3) B-B cab (primarily) freight units
PA - (PA-1,2,3) A1A-A1A passenger locomotives

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 in the marketplace.

4-axle units

Century 415
Century 420
Century 424
Century 425
Century 430

6-axle units

Century 628
Century 630
Century 636

8-axle units

Century 855 - Twin-engined 5500 hp locomotive for Union Pacific, 3 built

Miscellaneous

DH643 - experimental diesel-hydraulic locomotive for the Southern Pacific Railroad.