The GER Class T77 was a class of twenty-five 0-6-0

0-6-0

Under the Whyte notation for the classification of steam locomotives, 0-6-0 represents the wheel arrangement of no leading wheels, six powered and coupled driving wheels on three axles, and no trailing wheels...

 steam locomotives designed by A. J. Hill for the Great Eastern Railway

Great Eastern Railway

The Great Eastern Railway was a pre-grouping British railway company, whose main line linked London Liverpool Street to Norwich and which had other lines through East Anglia...

. They all passed to the London and North Eastern Railway

London and North Eastern Railway

The London and North Eastern Railway was the second-largest of the "Big Four" railway companies created by the Railways Act 1921 in Britain...

 at the 1923 grouping

Railways Act 1921

The Railways Act 1921, also known as the Grouping Act, was an enactment by the British government of David Lloyd George intended to stem the losses being made by many of the country's 120 railway companies, move the railways away from internal competition, and to retain some of the benefits which...

 and received the classification J19.

History

These locomotives were a development of the GER Class E72

GER Class E72

The GER Class E72 was a class of ten 0-6-0 steam locomotives designed by S. D. Holden for the Great Eastern Railway. They all passed to the London and North Eastern Railway at the 1923 grouping and received the classification J18.-History:...

, and shared the same 20 by 28 in (508 by 711.2 mm) cylinders, 4 in 11 in (1.5 m) wheels, and Belpaire firebox

Belpaire firebox

The Belpaire firebox is a type of firebox used on steam locomotives. It was invented by Alfred Belpaire of Belgium. It has a greater surface area at the top of the firebox, improving heat transfer and steam production...

-fitted boiler. Changes included vacuum brakes from new, and the abandonment of cylinder tail rods.

Table of orders and numbers

Year	Order	Manufacturer	Quantity	GER Nos.	LNER Nos.	1946 Nos.	Notes
1916–17	T77	Stratford Works Stratford Works Stratford Works was the locomotive-building works of the Great Eastern Railway situated at Stratford, London, England. It was opened in 1847-1848 by the GER's predecessor, the Eastern Counties Railway...	10	1140–1149	8140–8149	4650–4659
1917–18	H80	Stratford Works Stratford Works Stratford Works was the locomotive-building works of the Great Eastern Railway situated at Stratford, London, England. It was opened in 1847-1848 by the GER's predecessor, the Eastern Counties Railway...	5	1260–1264	8260–8264	4660–4664
1918–19	X80	Stratford Works Stratford Works Stratford Works was the locomotive-building works of the Great Eastern Railway situated at Stratford, London, England. It was opened in 1847-1848 by the GER's predecessor, the Eastern Counties Railway...	5	1265–1269	8265–8269	4665–4669
1920	A81	Stratford Works Stratford Works Stratford Works was the locomotive-building works of the Great Eastern Railway situated at Stratford, London, England. It was opened in 1847-1848 by the GER's predecessor, the Eastern Counties Railway...	5	1250–1254	8250–8254	4670–4674

All were still in service at the 1923 grouping, the LNER adding 7000 to the numbers of nearly all the ex-Great Eastern locomotives, including the Class T77 locomotives. Between 1934 and 1939 all were rebuilt with round-top fireboxes, and the cylinder bore was reduced to 19 inches (483 mm). The rebuilt locomotives were reclassified J19/2, while the yet-to-be rebuilt locomotives reclassified J19/1. The J19/2 classification also included the rebuilt former Class E72 locomotives.

At nationalisation in 1948, British Railways added 60000 to their LNER numbers. They all continued in service until 1959, when the first was withdrawn; all were gone by the end of 1962.

External links

• E72 and T77 class 0-6-0 – Great Eastern Railway Society
• The Hill J18 & J19 (GER Classes E72 & T77) 0-6-0 Locomotives – LNER Encyclopedia