NZR D class (1874)

NZR D class
D 140, preserved and in operation at the Ferrymead Railway
Type and origin Power type Steam Builder Dübs and Company (5), Neilson and Company (19), Scott Brothers (11) Build date 1874–1890
Specifications Configuration: ​  • Whyte 2-4-0T  • UIC 1B nt Gauge 3 ft 6 in (1,067 mm) Driver dia. 36 in (914 mm) Length 21 ft 6 in (6.55 m) Adhesive weight 11 long tons 10 cwt (25,800 lb or 11.7 t) Loco weight 14 long tons 14 cwt (32,900 lb or 14.9 t) Fuel type Coal Fuel capacity 0 long tons 11 cwt (1,200 lb or 0.6 t) Water cap. 300 imp gal (1,400 L; 360 US gal) Firebox: ​  • Grate area 7.3 sq ft (0.68 m2) Boiler pressure 130 psi (0.90 MPa) Heating surface 392 sq ft (36.4 m2) Cylinders Two, outside Cylinder size 9.5 in × 18 in (241 mm × 457 mm)
Performance figures Tractive effort 4,693 lbf (20.88 kN)
Career Operators Public Works Department New Zealand Railways Department Number in class 35 Numbers 6, 16, 18, 46-51, 108-9, 130-1, 137-145, 149, 169-171, 195-98, 221-2, 240, 315, 578 First run May 1874 Last run March 1927 Disposition Seven preserved, one converted into diesel-mechanical, remainder scrapped

NZR D class steam tank locomotives operated on New Zealand's national railway network. The first entered service in 1874 all had been withdrawn by the end of 1927, which allowed the D classification to be used again in 1929.