| Alco/MLW S4 |  | |||
|---|---|---|---|---|
| Revised: 3 September 2024 | GTW 8084 photo by: R. Craig | |||
| - | Info from: John Komanesky | |||
| Original owner | Road Numbers | Qty. | Bldr Numbers | Bldr Dates |
| Algiers Winslow & Western | 1, 2 | 2 | 79818, 79819 | 4/1953 |
| Angelina & Neches River | 12 | 1 | 82006 | 9/1958 |
| Armco Steel | E111, E112 | 2 | 81095, 81100 | 12/1954 |
| E113, E114 | 2 | 81334, 81335 | 5/1955 | |
| E115 | 1 | 81839 | 4/1956 | |
| E116 | 1 | 82009 | 5/1960 | |
| Atchison Topeka & Santa Fe | 1500 - 1509 | 10 | 78767-78776 | 5-6/1951 |
| 1510 - 1519 | 10 | 78805-78814 | 7/1951 | |
| 1520 - 1525 | 5 | 79809-79814 | 7/1952 | |
| 1526 - 1529 | 4 | 80059-80062 | 7-8/1952 | |
| 1530 - 1537 | 8 | 80613-80620 | 6/1953 | |
| Baltimore & Ohio | 468 - 474 | 7 | 81320-81326 | 4/1955 |
| 534 - 539 | 6 | 80954-80959 | 11-12/1953 | |
| 540, 541 | 2 | 80962, 80963 | 12/1953 | |
| 542 - 545 | 4 | 81327-81330 | 4/1955 | |
| 9078 - 9097 | 20 | 81860-81879 | 4-6/1956 | |
| 9098, 9099 | 2 | 81971, 81972 | 6/1956 | |
| 9100 - 9114 | 15 | 81985-81999 | 2-8/1957 | |
| Bessemer & Lake Erie | 291, 292 | 2 | 80054, 80065 | 7/1952 |
| Boston & Maine | 1266 - 1273 | 8 | 78021-78028 | 8/1950 |
| Central Vermont | 8015, 8027 | 2 | 79227, 80467 | 10/1951, 5/1953 |
| 8080, 8081 | 2 | 81400, 81401 | 9/1955 | |
| Chesapeake & Ohio | 5100 - 5104 | 5 | 80622-80626 | 7-8/1953 |
| 5105 - 5113 | 9 | 80629-80637 | 8-9/1953 | |
| Chicago & North Western | 1077 - 1079 | 3 | 81397-81399 | 8/1955 |
| 1093 - 1099 | 7 | 78828-78834 | 8/1951 | |
| Chicago Milwaukee St. Paul & Pacific | 1863 - 1867 | 5 | 78421-78425 | 11/1950 |
| 1868 - 1872 | 5 | 78718-78722 | 4/1951 | |
| 1873 - 1884 | 12 | 78844-78855 | 10/1951 | |
| 1885 - 1887 | 3 | 79216-79218 | 10/1951 | |
| 1888 - 1891 | 4 | 80083-80086 | 10/1952 | |
| 1892 - 1896 | 5 | 80969-80973 | 12/1953-1/1954 | |
| Chicago St. Paul Minneapolis & Omaha(C&NW) | 101 | 1 | 80621 | 7/1952 |
| Cincinnati New Orleans & Texas Pacific(Southern) | 6074, 6075 | 2 | 78337, 78338 | 9/1951 |
| Delaware & Hudson | 3033 - 3036 | 4 | 78029-78032 | 9/1950 |
| 3037 - 3046 | 10 | 78231-78240 | 9/1950 | |
| 3047 - 3050 | 4 | 78406-78409 | 10/1950 | |
| Erie | 526, 527 | 2 | 78716, 79530 | 4/1951, 1/1952 |
| 528, 529 | 2 | 80089, 80090 | 10/1952 | |
| Fairport, Painesville & Eastern | 105 | 1 | 79225 | 10/1951 |
| Ford Motor Co. | 10008 - 10011 | 4 | 81102-81105 | 12/1954 |
| 10012 | 1 | 81126 | 12/1954 | |
| Genesee & Wyoming | 35 | 1 | 82008 | 6/1959 |
| Georgia Port Authority | 101 | 1 | 80091 | 10/1952 |
| Grafton & Upton | 1001 | 1 | 79805 | 6/1952 |
| Grand Trunk Western | 8026 | 1 | 80466 | 5/1953 |
| 8034, 8035 | 2 | 81331, 81332 | 5/1955 | |
| 8082 - 8084 | 3 | 81402-81404 | 9/1955 | |
| 8085 - 8090 | 6 | 81436-81441 | 10/1955 | |
| 8196 - 8205 | 10 | 81973-81982 | 7-9/1956 | |
| Hammond Lumber Co. | 101 | 1 | 78140 | 6/1950 |
| Houston Belt & Terminal | 20, 21 | 2 | 78723, 78724 | 4/1951 |
| Ideal Cement Co. | 55 | 1 | 81442 | 10/1955 |
| Illinois Northern | 29 - 31 | 3 | 78413-78415 | 10/1950 |
| 32, 33 | 2 | 79228, 79229 | 10/1951 | |
| 34 | 1 | 79500 | 12/1951 | |
| Kaiser Steel | 1011 | 1 | 78815 | 8/1951 |
| 1012, 1013 | 2 | 79806, 79807 | 6/1952 | |
| 1015, 1016 | 2 | 81983, 81984 | 10-11/1956 | |
| 1017 - 1019 | 3 | 82001-82003 | 8/1957 | |
| Lehigh Valley | 166, 167 | 2 | 78725, 78766 | 5/1951 |
| Longview Portland & Northern | 112 | 1 | 79226 | 10/1951 |
| Los Angeles Junction | 6, 7 | 2 | 78410, 80628 | 10/1950, 8/1953 |
| Louisville & Nashville | 2225 - 2232 | 8 | 79492-79499 | 11-12/1951 |
| 2350 - 2365 | 16 | 80067-80082 | 8-9/1952 | |
| 2366 - 2369 | 4 | 80453-80456 | 5-6/1953 | |
| Maine Central | 311, 312 | 2 | 78008, 78020 | 8/1950 |
| 313 | 1 | 79502 | 12/1951 | |
| 314 - 317 | 4 | 81096-81099 | 9/1954 | |
| Manufacturers RR | 212 | 1 | 78835 | 8/1951 |
| Massena Terminal | 11 | 1 | 79219 | 10/1951 |
| Michigan Limestone & Chemical | 115 | 1 | 78420 | 11/1950 |
| Minnesota Transfer | 100 - 105 | 6 | 78796-78801 | 6/1951 |
| Monongahela Connecting | 139 - 143 | 5 | 78339-78343 | 9/1951 |
| Morristown & Erie | 14 | 1 | 79786 | 4/1952 |
| National Lead Co. | 9 | 1 | 81101 | 10/1954 |
| New Jersey Zinc Co. | 23 | 1 | 80638 | 9/1953 |
| New York Central | 8590 | 1 | 79531 | 2/1952 |
| 8591 - 8607 | 17 | 79542-79558 | 2/1952 | |
| 8608 - 8618 | 11 | 79561-79571 | 3/1952 | |
| 8619 - 8629 | 11 | 79775-79785 | 3-4/1952 | |
| 8630 - 8632 | 3 | 79788-79790 | 5/1952 | |
| New York Chicago & St. Louis (Nickel Plate) | 46 - 52 | 7 | 78697-78703 | 1/1951 |
| 53 - 60 | 8 | 78704-78711 | 3/1951 | |
| 61 | 1 | 79520 | 1/1952 | |
| 65 - 73 | 9 | 79521-79529 | 1/1952 | |
| 74 - 77 | 4 | 80468-80471 | 5/1953 | |
| 78 - 83 | 5 | 80447-80452 | 5/1953 | |
| Northeast Oklahoma | 705, 706 | 2 | 77041, 80066 | 2/1950, 8/1952 |
| Northern Pacific | 713 | 1 | 79230 | 10/1951 |
| 714 - 716 | 3 | 79331-79333 | 10-11/1951 | |
| 717 - 719 | 3 | 80462-80464 | 5/1953 | |
| 720 - 724 | 5 | 80964-80968 | 12/1953 | |
| Northern Pacific Terminal | 42, 43 | 2 | 79559, 79560 | 3/1952 |
| 44, 45 | 2 | 80297, 80298 | 1/1954 | |
| Pennsylvania | 8430 - 8432 | 3 | 80975-80977 | 1/1954 |
| 8433, 8434 | 2 | 80295, 80296 | 1, 2/1954 | |
| 8487 - 8499 | 13 | 79792-79804 | 5-6/1952 | |
| 8886 - 8899 | 14 | 78683-78696 | 11-12/1950 | |
| 8900, 8901 | 2 | 78779, 78780 | 6/1951 | |
| Piedmont & Northern | 1000 - 1005 | 6 | 81089-81094 | 10/1954 |
| Pittsburgh & Lake Erie(NYC) | 8633 - 8638 | 6 | 80639-80644 | 9/1953 |
| 8639 - 8643 | 5 | 80645-80649 | 10/1953 | |
| 8644 - 8653 | 10 | 80930-80939 | 10/1953 | |
| 8654 - 8667 | 14 | 80940-80953 | 11/1953 | |
| Portland Terminal (Maine) | 1055 - 1058 | 4 | 78416-78419 | 11/1950 |
| Schafer Bros. Logging Co. | 20 | 1 | 78412 | 10/1950 |
| Seaboard Air Line | 1482 - 1486 | 5 | 79820-79824 | 4/1953 |
| 1487 - 1491 | 5 | 80457-80461 | 4-5/1953 | |
| South Buffalo | 92 - 95 | 4 | 78824-78827 | 8/1951 |
| 96, 97 | 2 | 79518, 79519 | 1/1952 | |
| 98, 99 | 2 | 79787, 80063 | 5, 7/1952 | |
| Southern Pacific | 1464 - 1470 | 7 | 79339-79345 | 11/1951 |
| 1471 - 1485 | 15 | 79503-79517 | 12/1951 | |
| 1514 - 1525 | 12 | 80092-80103 | 3/1953 | |
| 1526 - 1528 | 3 | 79815-79817 | 4/1953 | |
| 1551 - 1557 | 7 | 81129-81135 | 3/1955 | |
| 1558 - 1567 | 10 | 81310-81319 | 3-4/1955 | |
| Tennessee Copper | 106 | 1 | 80465 | 5/1953 |
| Terminal Ry-Alabama State Docks | 511, 521 | 2 | 78804, 80088 | 8/1951, 10/1952 |
| 541, 571 | 2 | 80974, 82000 | 1/1954, 8/1957 | |
| Texas & New Orleans(SP) | 95 - 99 | 5 | 79220-79224 | 10-11/1951 |
| 100 - 104 | 5 | 79334-79338 | 11/1951 | |
| Texas & Northern | 10, 11 | 2 | 78802, 78803 | 6/1951 |
| Texas City Terminal | 33 | 1 | 80627 | 8/1953 |
| Toledo Terminal | 109, 110 | 2 | 78712, 78713 | 4/1951 |
| 111 | 1 | 80087 | 9/1952 | |
| Union Pacific | 1154 - 1162 | 9 | 81336-81344 | 6/1955 |
| 1163 - 1173 | 11 | 81385-81395 | 6-7/1955 | |
| 1174 - 1186 | 13 | 81443-81455 | 11-12/1955 | |
| 1187 - 1198 | 13 | 81825-81836 | 12/1955-3/1956 | |
| Union RR | 536, 537 | 2 | 78714, 78715 | 4/1951 |
| U.S. Steel | 1 | 1 | 81396 | 6/1955 |
| Wabash | 322 - 324 | 3 | 80610-80612 | 6/1953 |
| Weirton Steel | 210, 211 | 2 | 78836, 79808 | 9/1951, 6/1952 |
| 212, 213 | 2 | 81837, 81838 | 11/1956 | |
| 214 | 1 | 82007 | 6/1959 | |
| Western Maryland | 145, 146 | 2 | 78681, 78682 | 1/1951 |
| Western Pacific | 563, 564 | 2 | 78777, 78778 | 5/1951 |
| Wisconsin Central(Soo Line) | 2116 | 1 | 79791 | 5/1952 |
| Youngstown & Northern | 222, 223 | 2 | 78411, 79501 | 10/1950, 12/1951 |
| CANADA (built by MLW) | ||||
| Abitibi Power & Paper | 80 | 1 | 77585 | 6/1950 |
| Alma & Janquiere | 101, 102 | 2 | 76469, 77589 | 8/1949, 7/1951 |
| Asbestos & Danville | 46, 47 | 2 | 76495, 77587 | 11/1949, 9/1950 |
| 48, 49 | 2 | 77294, 81258 | 8/1953, 8/1956 | |
| Canadian National | 7995 - 7999 | 5 | 76481-76485 | 8-9/1949 |
| 8000 - 8005 (Orig. # 7600 - 7605) | 6 | 76486-76491 | 9-10/1949 | |
| 8006, 8007 (Orig. # 7606, 7607) | 2 | 76493, 76494 | 10/1949 | |
| 8008 - 8011 (Orig. # 7608 - 7611) | 4 | 76496-76499 | 10-11/1949 | |
| 8012 - 8015 | 3 | 77581-77584 | 12/1949-1/1950 | |
| 8016, 8017 | 2 | 77596, 77597 | 12/1951 | |
| 8018 - 8025 | 8 | 77598-77605 | 9-11/191952 | |
| 8028 - 8033 | 6 | 76443-76448 | 1-3/1954 | |
| 8036 - 8038 | 3 | 79193-79195 | 8-9/1955 | |
| 8039 - 8050 | 12 | 81217-81228 | 9-11/1955 | |
| 8051 - 8077 | 27 | 81231-81257 | 12/1955-2/1956 | |
| 8078, 8079 | 2 | 81229, 81230 | 11/1955 | |
| 8163 - 8170 | 8 | 81259-81266 | 8-9/1956 | |
| 8171 - 8180 | 10 | 81549-81558 | 9-10/1956 | |
| 8181 - 8190 | 10 | 81573-81582 | 10-12/1956 | |
| 8191 - 8195 | 5 | 81653-81657 | 12/1956-2/1957 | |
| Canadian Pacific | 7099 - 7105 | 7 | 76469-76475 | 6/1949 |
| 7106 - 7108 | 3 | 76476-76478 | 7/1949 | |
| 7109 - 7114 | 6 | 77590-77595 | 7-8/1952 | |
| 7115 - 7118 | 4 | 77290-77293 | 3-5/1953 | |
| Falconbridge Nickel Mines | 108 | 1 | 76449 | 1/1955 |
| Ontario Northland | 1203 | 1 | 77586 | 12/1950 |
| Quebec Iron & Titanium (Romaine River Ry.) | 1, 2 | 2 | 76480, 76492 | 8, 10/1949 |
| 4 | 1 | 77588 | 5/1951 | |
EXPORT MEXICO |
||||
| Altos Hornos Mexico S.A. | 111 | 1 | 78717 | 4/1951 |
| 115 | 1 | 81333 | 5/1955 | |
| 117, 118 | 2 | 82004, 82005 | 8/1957 | |
| 121 | 1 | 82010 | 3/1961 | |
| National de Mexico | 5523 - 5530 | 8 | 78816-78823 | 7-8/1951 |
| Secretaria de Marina Nacional | 101, 102 | 2 | 81127, 81128 | 1/1955 |
Sources of information: Extra 2200 South, Diesel Era, The Short Line and The Canadian Trackside Guide. Additional info provided by R. Craig. |
||||
| Technical Data |  |
|---|---|
| Data Sheet and drawing by: JEAN-DENIS BACHAND | |
| -- | -- |
| Engine Builder: Alco | Engine: 4-cycle Model 539 6L |
| Bore & Stroke | 12.5" X 13.0" |
| RPM (Maximum / Minimum) | S4 740/275 |
| Main Generator: S4: GT 563 | Horsepower: 1000 |
| Gear Ratio: 75:16 | Speed: 60 mph |
| Trucks: 4-Wheel | Configuration: B-B |
| Traction Motor Blowers: Mechanical Driven (2) | Model: ? |
| Weight: 229,700 lbs | Traction Motors: S2: GE 731 (Four) / S4: GE 731D |
| Tractive Effort (starting) 72,400 lbs @ 30% | Tractive Effort (continuous): 34,000 @ 8 mph |
| Multiple Unit Capability: Yes | Dynamic Braking: Yes |
| Auxilary Generator: GE SMG139 | Alternator: -- |
| Air Brake: Westinghouse | Model: 14EL |
| Compressor: Westinghouse | Model: 3CD |
| Quantity Built: S4: 651 (Dates: 6/1950 to 1/1961) | |
| - | - |
| Drawing by: JEAN-DENIS BACHAND | |
| Total Length | 44'-05" |
| Pilot to Pilot | 37'-00" |
| Wheel Diameter | 40" |
| Truck Wheel Base | 8'-00" |
| Height to Top Engine Hood | 12'-01" |
| Height to Top Cab Hood | 14'-05" |
| Cab Width | 10'-00" |
| Walkway Width | 4'-01" |
| Engine Hood Width | 6'-10" |
| Center Bolster | 22'-00" |
| Center Front Truck to Front Pilot | 7'-06" |
| Center Rear Tucrk to Rear Pilot | 7'-00" |
| Distance between Truck Centers | 30'-00" |
| Minimum Turning Radius | ? degrees |
| - | - |
| Fuel Oil: 635 | Lubricating Oil: 80 |
| Engine Cooling Water: 200 | Sand Capacity: 27 cu. ft. |
Options: Dynamic Brakes
| |
| - | - |
| Drawing by: JEAN-DENIS BACHAND | |
Reference Sources:
New: 15 Auugust 2005 | |