Diesel Electric Locomotive - Model CM636
Heavy duty diesel electric Co-Co hood-type freight locomotive rated at 2909/2686kW (3900/3600HP)
These locomotives were a rebuild of some units built by the original Alco licensee in Australia - A. E. Goodwin Ltd up until 1974 when Goodwin's closed and the license passed to Comeng.
These locomotives were powered by an Alco 251F engine is coupled directly to the main generator .
"The full width air-conditioned cab is at one end only, and provides the driver with an 180 degree range of vision ... Acess is via a central door at the front, or by either of the two side doors off the walkway alongside the hood.
The spacious layout of the cab includes a small washroom and toilet."
The cab on these rebuilt locos was a local design known as the Pilbara cab. They were designed to give the crews added comfort in the extreme conditions that these locos had to operate in.
| Gauge | 1435mm |
| Tractive effort at 30% adhesion | 561kN |
| Tractive effort at 20% adhesion | 374kN |
| Continuous tractive effort at 18.6km/h | 403kN |
| Continuous tractive effort @ 60km/h | 170kN |
| Maximum speed | 113km/h |
| Engine | Alco 251F Vee formation 16 cylinder, 4 stroke, turbo-supercharged |
| Engine speed - Idle | 400rpm |
| Engine speed - Max | 1100rpm |
| Engine power | 2909kW (3900HP) |
| Power for traction | 2686kW (3600HP) |
| Traction alternator | Type 5GTA11 |
| Traction motors | Type 5B752 |
| Gear ratio | 74:18 |
| Axle load | 31.8 tonnes |
| Total weight | 190 tonnes |
| Fuel oil | 20,000 litres |
| Cooling water | 1513 litres |
| Sand | 1.7 cubic metres |