| Western Australian Government Railways B class | |
| Powertype: | Diesel-hydraulic |
| Builder: | Commonwealth Engineering |
| Builddate: | 1962-1965 |
| Totalproduction: | 10 |
| Aarwheels: | 0-6-0 |
| Uicclass: | C |
| Locoweight: | 39.2LT |
| Fueltype: | Diesel |
| Fuelcap: | 340impgal |
| Primemover: | Cummins VT-12-BI |
| Enginetype: | Four-stroke V12 diesel |
| Aspiration: | Turbocharged |
| Cylindercount: | 12 |
| Transmission: | Twin Disc CF11,500 series MS450 hydraulic torque converter Wiseman 15 RLGB/H final drive |
| Maxspeed: | 260NaN0 |
| Poweroutput: | 473-1NaN-1 |
| Tractiveeffort: | 23000lb-f (starting) 18000lb-f (continuous) |
| Operator: | Western Australian Government Railways |
| Numinclass: | 10 |
| Fleetnumbers: | B1601-B1610 |
| Firstrundate: | 21 March 1962 |
| Lastrundate: | 28 September 1984 |
| Disposition: | 4 preserved, 6 scrapped |
The B class were a class of diesel locomotives built by Commonwealth Engineering for the Western Australian Government Railways between 1962 and 1965.
The first five B class units entered service in 1962. Three years later, a second batch of five was delivered.[1]
The second batch differed from the first only in having sloping cab sides, to enable the second batch to pass underneath the limited clearance cranes on the Fremantle wharves.[1]
All members of the class spent the whole of their working lives in the Perth metropolitan area, and were written off as a group in September 1984.[1] [2] Some of them have since been preserved.[3] [4]