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 please see sublists List of preserved locomotives in the United States and List of preserved locomotives in Canada.

Boxcab locomotives ModelBuild dateTotalproducedWheelarrangementPrime moverPower outputImage 60-ton 1925–1928 26 B-B Ingersoll-Rand 100-ton 1925–1928 7 B-B Ingersoll-Rand 10 × 12 (×2)  × 2 New York Central 1525 1928 1 B-B Ingersoll-Rand /batteries/3rd rail 66-ton 1931 6 B-B McIntosh & Seymour 9½ x 10½

Switchers ModelSpecificationBuild dateTotalproducedWheelarrangementPrime moverPower outputImage ALCO 300 — 1931–1938 11 B-B M&S 6-330 ALCO 600 — 1931 1 B-B 6-531 HH600 — 1931–1939 78 B-B 6-531 HH900 — 1937–1939 21 B-B 6-531T HH660 — 1939–1940 43 B-B 6-538 HH1000 — 1939–1940 34 B-B 6-538T S-1 E-1530 1940–1950 543 B-B 6-539 S-2 E-1540 1940–1950 1,462 B-B 6-539T S-3 E-1530A 1950–1953 137 B-B 6-539 S-4 E-1540A 1949–1957 651 B-B 6-539T S-5 DL420 1951 1 B-B 6-251 S-5 DL-421 1954 7 B-B 6-251A S-6 DL-430 (1st) 1955–1960 126 B-B 6-251B SB-8/SSB-9 DL-431/DL-461 1956 2 sets B-B+B-B 6-251B × 2 × 2 T-6 DL-440 1958–1969 57 B-B 6-251B

Cab units ModelSpecificationBuild dateTotalproducedWheelarrangementPrime moverPower outputImage Rebel power cars — 1935, 1937 3 2-B 6-531 — DL-103b 1939 1 A1A-A1A 6-538T × 2 × 2 — DL-105 1940 3 A1A-A1A 6-539T × 2 × 2 — DL-107 1940–1941 8 A1A-A1A 6-539T × 2 × 2 — DL-108 1941 3 A1A-A1A 6-539T × 2 × 2 — DL-109 1941–1945 62 A1A-A1A 6-539T × 2 × 2 — DL-110 1942 1 A1A-A1A 6-539T × 2 × 2 — DL-202 1945 2 B-B 12-241 — DL-203 1945 1 B-B 12-241 FA-1 DL-204, DL206, DL-208, DL-208A, DL-208B 1946–1950 396 B-B 12-244A, B FA-1 DL-208C 1950 21 B-B 12-244C FB-1 DL205, DL-209, DL-209A, DL-209B 1946–1950 213 B-B 12-244A, B FB-1 DL-209C 1950 16 B-B 12-244C FA-2 DL-212, DL-212A 1950–1956 308 B-B 12-244D, G FPA-2 DL-212, DL-212A 1950–1951 54 B-B 12-244D FB-2 DL-213, DL-213A 1950–1956 181 B-B 12-244D, G FPB-2 DL-213, DL-213A 1950–1956 25 B-B 12-244D PA-1 DL-304, DL-304A, DL-304B 1946–1949 169 A1A-A1A 16-244 PB-1 DL-305, DL-305A, DL-305B 1946–1949 39 A1A-A1A 16-244 PA-2 DL-304C, DL-304D 1950–1953 81 A1A-A1A 16-244 PB-2 DL-305, DL-305D 1950–1953 8 A1A-A1A 16-244

Four-axle road switchers ModelSpecificationBuild dateTotalproducedWheelarrangementPrime moverPower outputImage RS-1 E-1641A 1941–1960 469 B-B 6-244T, 6-539T RS-2 E-1661, E-1661A, E-1661B 1946–1950 338 B-B 12-244 RS-2 E-1661C 1950 30 B-B 12-244 RS-3 E-1662, E-1662A, E-1662B 1950–1956 1,272 B-B 12-244 RS-11 DL-701 1956–1961 433 B-B 12-251 RS-27 DL-640 1959–1962 27 B-B 16-251 RS-32 DL-721 1961–1962 35 B-B 12-251 RS-36 DL-701XAP 1962–1963 40 B-B 12-251

Six-axle road switchers ModelSpecificationBuild dateTotalproducedWheelarrangementPrime moverPower outputImage RSC-1 1946 4 A1A-A1A 6-539T RSD-1 E-1641 1946 6 C-C 6-244T, 6-539T E-1645 1942-1943 57 C-C 6-244T, 6-539T E-1646 1944–1945 100 C-C 6-244T, 6-539T RSC-2 E-1661, E-1661A, E-1661B 1946–1950 86 A1A-A1A 12-244 E-1661C 1950 5 A1A-A1A 12-244 RSC-3 E-1662, E-1662A, E-1662B 1950–1955 99 A1A-A1A 12-244 RSD-4 E-1663, E-1663A, E-1663B 1951–1952 36 C-C 12-244 RSD-5 E-1664, E-1664A, E-1664B 1952–1955 204 C-C 12-244 RSD-7 DL-600 1954 2 C-C 16-244 RSD-7 DL-600A 1955–1956 27 C-C 16-244 RSD-12 DL-702 1956–1963 171 C-C 12-251B RSD-15 DL-600B 1956–1960 75 C-C 16-251B

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.

ModelSpecificationBuild dateTotalproducedWheelarrangementPrime moverPower outputImage C415 DL-415 1966–1968 26 B-B 8-251F C420 DL-721A 1963–1968 131 B-B 12-251C C424 DL-640A 1963–1967 98 B-B 16-251B C425 DL-640B 1964–1966 91 B-B 16-251C C430 DL-430 (2nd) 1967–1968 16 B-B 16-251E C628 DL-628 1963–1968 186 C-C 16-251C C630 DL-630 1965–1968 133 C-C 16-251E C636 DL-636 1967–1968 63 C-C 16-251E C855 DL-855 1964 2 B-B+B-B Dual 16-251 C855B DL-856 1964 1 B-B+B-B Dual 16-251

Diesel-hydraulic locomotives ModelSpecificationBuild dateTotalproducedWheelarrangementPrime moverPower outputImage DH643 DH-400 1964 3 C-C Dual 12-251C

Military locomotives ModelSpecificationBuild dateTotalproducedWheelarrangementPrime moverPower outputImage MRS-1 or RSX-4 E-1670 1953–1954 83 C-C 12-244D

Export and narrow gauge locomotives ModelSpecificationBuild dateTotalproducedWheelarrangementPrime moverPower outputImage FCA-3 DL212 1951-1953 23 A1A-A1A 12-244D FD-3 DL500 1953 3 C-C 12-244D FD-3 DL500A 1955 16 C-C 12-244D FPD-5 DL500A 1955–1956 12 C-C 12-244 Renfe Class 316 DL500A 1957 25 C-C FD-6 DL500B 1958–1968 141 C-C 12-25112-251B DL500B1 - SEK class A-301 DL500C C-C 12-251B FD-7 DL500CI 1957-1958 99 C-C 12-251B DL500CP 1957-1959 59 - FD-9 DL500D C-C 12-251b FP-9 DL500G 1965–1973 131 C-C 12-251B FPD 9 DL500S 1964-1966 23 C-C ALCO 251-C DL503S - DL510 - DL515 - DL515I - DL521 - DL522G - DL530 - RSD-8 (NSW 48) DL531 1959–1970 295 C-C 6-251D RSD-8 DL531A 1958–1959 57 C-C 6-251D DL531B - DL531G - RS-8 DL532 1966–1974 104 B-B 6-251D SEK class A-201 DL532B 1961–1962 10 B-B 6-251D DL533 - DL534 - RSD-35 DL535 1963 40 C-C 6-251D RSD-35 DL535 1963 70(MLW) C-C 6-251D RSD-39 DL535-S/DL535-T 1965–1967 76 C-C ALCO 251-D YDM-4 RSD-30 DL535A 1961–1969 100 (#6020-#6049 and #6105-#6129) C-C 6-251D ENAFER RSD-35 DL535B 1963, 1969, 1974 26 C-C DL535C - DL535E DL535E 1969completed by MLW 10 C-C 6-251D DL535M 1963 115 - DL535S A1A-A1A DL535T - RSD-36 DL536 1978 20 C-C 6-251D Tunisian Railways 040-DK DL536B - RSD-37 DL537 1965 12 C-C 6-251D SEK class A-9101 DL537 1965 C-C 6-251D DL539 - RSD-16 DL540 1957–1959 130 C-C ALCO 12-251B RSD-16 DL541 1960–1968 77 C-C 12-251B DL542 - SEK class A-321 DL543 1961–1970 117 C-C 12-251C DL543A - DL543SPAP - DL544 - DL550DL550K 1964 1 - DL551 - DL551B - DL-560 DL560DL560A 1963–1964 12 C-C 12-251B DL560B 1966 3 - WDM-2/ALCO RSD-29 DL560C 1962-1997 2962, 18040 – 18079 (1962), 18112 – 18232 (1962 – 1963), 18245 – 18298 (1964 – 1965), 18337 – 18361 (1965) C-C 16-251B DL560D 1974 15 -

Montreal Locomotive Works Export locomotives

ModelSpecificationBuild dateTotalproducedWheelarrangementPrime moverPower outputImage MX615 1972–1979 74 C-C-1 MLW 8-251A MX620 1973–1980 145 C-C MLW 12-251C MX624 1975–1983 69 C-C MLW 12-251E MX626 1972–1982 32 C-C MLW 12-251E OSE class A-451 MX627 1972–1978 33 C-C MLW 12-251C OSE class A-501 MX636 1974–1980 10 C-C MLW 16-251E MXS620 1973–1982 100 C-C MLW 12-251E Double End Cab Units MXS624 1973–1983 33 C-C MLW 16-251E Double End Cab Units MXS627 1978–1980 10 C-C MLW 16-251C Double End Cab Units MXS630 1978–1982 33 C-C MLW 16-251E Double End Cab Units

References

External links

ALCOWorld