Total Number of Engines Built	55
First Engine Built	1950
Last Engine Built	1958
First Engine Written Off	1967
Last Engine Written Off	1970

31/12/50	31/12/60	31/12/66	31/12/67	31/12/68	31/12/69	31/12/70
–	55	55	53	44	11	–

31/12/67	31/12/68	7/10/69
37	17	10

Notes

This design was an improvement on earlier successful B18¼ incorporating modern appliances. Some modifications to the original design were suggested by Vulcan Foundry and subsequently adopted. A number of features, including the mounting of WH pump on fireman’s side, stainless steel rather than brass boiler bands, SCOA-P coupled wheels and pressed steel sand box, distinguished these engines from the earlier B18¼ class. Engines constructed by Walkers Limited used electricity for the light on the rear of the tender, for side lamps and to illuminate the motion. All were fitted with Roller Bearings and chime whistles. The engines were painted green when introduced.

The first batch was constructed by Vulcan Foundry and the last 20 by Walkers Ltd, Maryborough. Contracts were let to both manufacturers in 1948 but Walkers did not deliver its first engine until 1955 due to shortages of materials. Delays in these deliveries resulted in the last of the order, N°1089, not entering service until March 1958 and thus becoming the last mainline steam locomotive to be built and placed in service in Australia. In fact Walkers had delivered some diesels to QR before completing this order.

Several members of the class that were overhauled in the final years were repainted black. In the 1950’s a “standard” boiler was designed to be suitable for both this class and B18¼ engines.

They proved to be a most successful design and were popular with crews. Initially they were used on mail trains, long distance passenger and goods trains and northside suburban services. The introduction of diesels saw them gradually relegated to lesser duties and ultimately cut short their careers.

Last engines in service were N°1012, 1030, 1037, 1039, 1070, 1073, 1081 and 1084 at Mackay and N°1088 at Ipswich.

Abbreviations

Vulcan – Vulcan Foundry, Newton-le-Willows, Lancs.,
Walkers – Walkers Limited, Engineers, Maryborough, Qld
ZZR – Zig Zag Railway Lithgow NSW

Main lines

Main Line: UP to Toowoomba, DOWN to Roma Street.

Southern Line: UP to Wallangarra, DOWN to Toowoomba.

South Western Line: UP to Dirranbandi, DOWN to Warwick.

Western Line: UP to Cunnamulla, DOWN to Toowoomba.

Great Western Line: UP to Quilpie, DOWN to Westgate.

North Coast Line: UP to Roma Street, DOWN to Cairns.

Central Western Line: UP to Winton, DOWN to Rocklands

Moura line: UP to Gladstone, DOWN to Moura

Goonyella line: UP to North Goonyella, DOWN to Hay Point

Great Northern Railway:

Branch lines

Ebenezer branch: UP to Ebenezer, DOWN to Yarrowlea

Millmerran branch: UP to Millmerran, DOWN to Wyreema

Jandowae branch:

Glenmorgan branch:

Wandoan branch:

Kingaroy branch:

Monto branch:

Boundary Hill branch:

Biloela branch:

Callide branch:

Goovigen branch:

Theodore branch:

Brisbane Suburban Area:

Gold Coast Line (Beenleigh Line): UP to Robina, DOWN to Roma Street.

Cleveland Branch: UP to Cleveland (and Fisherman Islands), DOWN to Park Road.

Yeerongpilly-Corinda Branch: UP to Corinda, DOWN to Yeerongpilly.

Acacia Ridge Branch: UP to Acacia Ridge, DOWN towards (Salisbury Junction).

Main Line: UP to Rosewood, DOWN to Roma Street.

Box Flat branch: UP to Box Flat/Swanbank, DOWN to Bundamba

North Coast Line: DOWN to Caboolture, UP to Roma Street.

Exhibition Loop: UP to Roma Street, DOWN to Mayne Junction.

Ferny Grove Branch: DOWN to Ferny Grove, UP to Bowen Hills.

Pinkenba Branch: DOWN to Pinkenba, UP to Eagle Junction.

Airport Branch: DOWN to Domestic, UP to Airport Junction.

Shorncliffe Branch: DOWN to Shorncliffe, UP to Northgate.