Between 1923 and 1930, the New South Wales Government Railways took delivery of 37 of the 42-Foot (CPH) rail motors and 5 similar 42-Foot trailers to replace locomotive-hauled passenger trains on lightly trafficked lines with a low patronage.

The main problem standing in the way of development was finding a suitably sized internal combustion engine to power this larger vehicle.

In 1949, BPH 38 was reallocated to Narrandera where it operated with 400 class rail motors on services to Hay and Tocumwal connecting with the Riverina Express.

[1] With the replacement of many branch line services by road coaches, CHP 38 became surplus to requirements and was condemned in April 1983 and sold to the Dorrigo Steam Railway & Museum.

Following the electrification of the line to Waterfall in July 1980, it was stored, then condemned in April 1983 and sold to the Dorrigo Steam Railway & Museum.