| Class | Max No. of class | Nos. |
| 1951 - CR GM class (Diesel-electric) | 12 | GM 10, GM 12, GM 14, GM 18 - GM 19, GM 22, GM 25 - GM 27, GM 33, GM 35, GM 41 |
| 1952 - B Class (Diesel-electric) | 1 | B 75 |
| 1955 - T Class (Diesel-electric) | 7 | T 372 - T 373, T 376 - T 377, T 381, T 386, T 345 |
| 1957 - 44 class (Diesel-electric) | 4 | 4468, 4471, 4477, 4483 |
| 1957 - S Class (Diesel-electric) | 1 | S 317 |
| 1962 - 45 class (Diesel-electric) | 4 | 4501 - 4502, 4528, 3532 |
| 1966 - WAGR J class (Diesel-electric) | 4 | J 102 - J 105 |