New South Wales Z26 class locomotive

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New South Wales Z26 class
NSWGR Class Z26 Locomotive.jpg
Class Z26 Locomotive
Type and origin
Power type Steam
Builder Dübs and Company
Total produced 20
 • Whyte 2-6-2T
 • UIC 1'C1'nt
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Driver dia. 4 ft 0 in (1.219 m)
Adhesive weight 88,000 lb (39,916 kg; 40 t)
Loco weight 146,000 lb (66,224 kg; 66 t)
Fuel type Coal
 • Firegrate area
21 sq ft (2.0 m2)
Boiler pressure 150 psi (1.03 MPa)
Heating surface 1,345 sq ft (125.0 m2)
Superheater None
Cylinders Two, outside
Cylinder size 18 in × 26 in (457 mm × 660 mm)
Performance figures
Tractive effort 22,380 lbf (99.6 kN)
Factor of adh. 3.49
Operators New South Wales Government Railways
Class I17, Z26 from 1924
Numbers 17-22, 103, 127-129, 292, 293, 391, 394, 397-402
(2601–2620 from 1924)
Disposition 2 preserved, 18 scrapped

The 26 class (formerly I.17 class) was a class of steam locomotives built by Dübs and Company for the New South Wales Government Railways of Australia.[1][2][3]


Dübs and Company were contracted to supply 20 large mineral tank locomotives, the design of which included the fitting of a Webb radial axle[4] at the bunker end. The locomotives were delivered in the early months of 1892.

Originally intended for assisting freight trains over the Blue Mountains line, they were found unsatisfactory due to insufficient water capacity and inflexibility around tight curves. Several were sent to Waterfall for working coal and blue metal trains. Shunting at Darling Harbour and Alexandria goods yards was the duty of the remainder of those based in Sydney. Others were stationed at the old Hamilton locomotive depot for working trains from the interchange with the South Maitland Railway at East Greta to Newcastle.[5]

Although replaced in 1905 by larger locomotives between Waterfall and Sydney, they continued to haul coal hopper wagons to Waterfall and, additionally were used to assist northbound trains through Otford Tunnel. At holiday times, some of these locomotives were transferred to working picnic trains to The National Park.[2]

During the 1920s most of the class was withdrawn. After several years out of use, were returned to traffic as shunters, particularly at western centres such as Lithgow, Bathurst and Orange. Several were sent to Albury to assist at this busy break-of-gauge station and others to Port Kembla.[2]

From 1942 until 1956 two of the class were engaged in shunting carriages at Sydney Central Station. They were removed when overhead wiring was installed as using the water columns was a hazard owing to the location of the inlet.[2]

The first was withdrawn in September 1956 with only nine remaining by 1961.[6] The final two representatives of the class in service were 2604 and 2606, which were to be found at Bathurst until 1970.[2]


Preserved Z26 Class Locomotives
No. Description Manufacturer Year Current Organisation Location Status Ref
2605 2-6-2ST mixed traffic Dübs and Company 1891 Lithgow State Mine Heritage Park & Railway Lithgow Undergoing Working Restoration
2606 2-6-2ST mixed traffic Dübs and Company 1891 New South Wales Rail Transport Museum Broadmeadow Locomotive Depot stored NSW Locomotive, Steam 2606


See also[edit]


  1. ^ Preston, Ron G (1984). Tender into Tank. Sydney: New South Wales Rail Transport Museum. pp. 11–57. ISBN 0 909862 18 4. 
  2. ^ a b c d e Grunbach, Alex (1989). A Compendium of New South Wales Steam Locomotives. Sydney: Australian Railway Historical Society, NSW Division. pp. 41–45. ISBN 0 909650 27 6. 
  3. ^ New South Wales Railways 1855-1955. Published by Department of Railways
  4. ^ See Glossary of Terms
  5. ^ Grunbach, Alex (1989). A Compendium of New South Wales Steam Locomotives. Sydney: Australian Railway Historical Society, NSW Division. pp. 108–111. ISBN 0 909650 27 6. 
  6. ^ Oberg, Leon (1984). Locomotives of Australia 1850's - 1980's. Frenchs Forest: Reed Books. p. 71. ISBN 0 730100 05 7.