List of MLW diesel locomotives Switchers (S series) Switchers (S series)

| Model | Specification | Build_date | Total_produced | Wheel_arrangement | Prime_mover | Power_output |
|---|---|---|---|---|---|---|
| S-2 | E1540 | 1940–1950 | 40 | B-B | 6-539T | hp (kW) |
| S-3 | E-1530A | 1950–1957 | 163 | B-B | 6-539 | hp (kW) |
| S-4 | E-1540A, E-1540B | 1949–1957 | 146 | B-B | 6-539T | hp (kW) |
| E-1800 | E-1800 | 1951 | 2 | B-B | none | yard slug |
| E-1800 | E-1800a | 1957 | 2 | B-2 | none | yard slug |
| S-7 | DL-1000 or ME-1000 | 1957 | 29 | B-B | 6-539T | hp (kW) |
| S-10 | DL-066 | 1958 | 13 | B-B | 6-539 | hp (kW) |
| S-11 | DL-406 | 1959 | 10 | B-B | 6-539 | hp (kW) |
| S-12 | DL-410 | 1958 | 11 | B-B | 6-539T | hp (kW) |
| S-13 | DL-411, DL-411A | 1959–1967 | 56 | B-B | 6-251C | hp (kW) |