MDH1 (Stephen Cleverdon)
Locomotive numbers: MDH1-6
Model Number: HG6R
| Type | Diesel-Hydraulic |
| Introduced | 1958 |
| Number in class | 6 |
| Manufacturer | Clyde Engineering, Granville |
| Gauge | Standard |
| Axles | Co |
| Length | 9.35 m |
| Mass | 54 t |
| Engine | Maybach MD325 |
| Transmission | Mekydro K104U |
| Power | 405 kW / 543 HP |
| Tractive effort | 132 / 58 kN |
| Speed | 64 / 8 km/h |
The MDH class were also used as shunters at Port Augusta, Port Pirie, and Parkeston. Later, they were stored, and five scrapped. MDH1 later saw shunting use with the ETSA at their Playford power station at Port Augusta, along with a similar unit owned by the ETSA.
Preserved locomotives:
| MDH1 | Homestead Park Museum, Port Augusta |
Named locomotives:
| MDH1 | F J Shea |
Fred Shea was a former SAR Chief Mechanical Engineer.
| Loco | Serial # | In Service | Comments |
| MDH1 | 58-192 | 10/1958 | Preserved, Renumbered ETSA2 |
| MDH2 | 58-193 | 10/1958 | Scrapped |
| MDH3 | 58-194 | 11/1958 | Scrapped |
| MDH4 | 58-198 | 11/1958 | Scrapped |
| MDH5 | 59-199 | 5/1959 | Scrapped |
| MDH6 | 59-200 | 5/1959 | Scrapped |