CM39-8 Class
5630 (Kevin Dunk)

Locomotive numbers: 5630-5633
Model Number: CM39-8/CM40-8
| Type | Diesel-Electric |
| Introduced | 1988 |
| Number in class | 4 |
| Manufacturer | Goninan, Welshpool |
| Gauge | Standard |
| Axles | Co-Co |
| Length | 21.54 m |
| Mass | 195 t |
| Engine | GE 8FDL-16 / 7FDL-16 |
| Generator | GE GMG187 |
| Traction motors | GE 752AG |
| Power | 3060 kW / 4100 HP |
| Tractive effort | 628 / 485 kN |
| Speed | 112 / 17 km/h |
These were the first new locos on the Newman line since the
completion of the C636s, around 15 years previously.
They are later re-engined with '7FDL' engines, as per the rebuilds.
Named locomotives:
| 5630 | Zeus |
| 5631 | Apollo |
| 5632 | Poseidon |
| 5633 | Hephaestus |
All the locos have been named after Greek gods.
| Loco | Serial # | In Service | Comments |
| 5630 | 5831-9/88-79 | 12/1988 | |
| 5631 | 5831-10/88-80 | 12/1988 | |
| 5632 | 5831-11/88-81 | 12/1988 | |
| 5633 | 5831-12/88-82 | 1/1989 |