WAGR Y class

Western Australian Government Railways
Y1114 at Picton Yard in December 1986
Type and origin Power type Diesel-electric Builder British Thomson-Houston at Clayton Equipment Company Serial number 1011–1028 Model British Thomson-Houston 1850 Build date 1953–1955 Total produced 18
Specifications Configuration: ​  • AAR B-B  • UIC Bo-Bo, Bo′Bo' Gauge 1,067 mm (3 ft 6 in) Length 10.02 m (32 ft 10 in) Loco weight 39 t (38 long tons; 43 short tons) Fuel type Diesel Prime mover Paxman 12RPHL Generator British Thomson-Houston RTB8844 Traction motors British Thomson-Houston 124PV, 4 of
Performance figures Power output 306 kW (410 hp)
Career Operators Western Australian Government Railways Number in class 18 Numbers Y1101-Y1118 First run November 1953 Preserved Y1101, Y1102, Y1107, Y1108, Y1114, Y1115, Y1116 Disposition 7 preserved, 11 scrapped

The Y class was a class of diesel locomotives built by British Thomson-Houston and Clayton Equipment Company for the Western Australian Government Railways between 1953 and 1955. British Thomson-Houston supplied the electrical control equipment but the mechanical work, assembly and testing was carried out by Clayton Equipment Company at their workshops in Hatton, Derbyshire.

They were used as shunters, primarily in Perth and Fremantle although some did haul freight services in the Geraldton and Pinjarra areas. They were withdrawn by 1990 with seven being preserved.