GER Class T77

The GER Class T77 was a class of twenty-five 0-6-0 steam locomotives designed by A. J. Hill for the Great Eastern Railway. They all passed to the London and North Eastern Railway at the 1923 grouping and received the classification J19.

GER Class T77 LNER Class J19
Down (westbound) freight on the North London line at Finchley Road & Frognal. The train was probably from Temple Mills Yard (Leyton), heading for the SR with a Gresley rebuild of ex-GE J19 No. 64657. 7 May 1955
Type and origin Power type Steam Designer A. J. Hill Builder Stratford Works Build date 1916–1920 Total produced 25
Specifications Configuration: ​  • Whyte 0-6-0  • UIC C h2 Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 4 ft 11 in (1.499 m) Wheelbase 38 ft 7 in (11.76 m) Length 52 ft 2 in (15.90 m) over buffers Loco weight 47 long tons 7.5 cwt (106,100 lb or 48.1 t) Firebox: ​  • Grate area 21.6 sq ft (2.01 m2) Boiler pressure 160 lbf/in2 (1.10 MPa) Heating surface 1,501.1 sq ft (139.46 m2) Cylinder size 20 in × 28 in (508 mm × 711 mm) Valve gear Stephenson
Performance figures Tractive effort 25,817 lbf (114.84 kN)
Career Operators Great Eastern Railway → London and North Eastern Railway → British Railways Class GER: T77 LNER: J19 Power class BR: 5F Axle load class LNER/BR: RA 5 Withdrawn 1959–1962 Disposition All scrapped

History

These locomotives were a development of the GER Class E72, and shared the same 20-by-28-inch (508 mm × 711 mm) cylinders, 4-foot-11-inch (1.499 m) wheels, and Belpaire firebox-fitted boiler. Changes included vacuum brakes from new, and the abandonment of cylinder tail rods.

Table of orders and numbers^[1]

Year	Order	Manufacturer	Quantity	GER Nos.	LNER Nos.	1946 Nos.	Notes
1916–17	T77	Stratford Works	10	1140–1149	8140–8149	4650–4659
1917–18	H80	Stratford Works	5	1260–1264	8260–8264	4660–4664
1918–19	X80	Stratford Works	5	1265–1269	8265–8269	4665–4669
1920	A81	Stratford Works	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).^[1] 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.^[2]

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.^[1]

Table of withdrawals^[3]

Year	Quantity in service at start of year	Quantity withdrawn	Locomotive numbers	Notes
1959	25	8	64651/58/61–62/65/68/70/72
1960	17	6	64650/54/56/59–60/63
1961	11	7	64652–53/55/66–67/69/74
1962	4	4	64657/64/71/73