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Record: 71951 (21/04/2026)
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GNR/LNER Ivatt "J4" Class 0-6-0


Class Types
GNR Class J5
LNER Class J4

General
Designer Henry Ivatt
Introduced 1873
Pre-Grouping Company Great Northern Railway
Grouping Company London and North Eastern Railway
Description (1957) Class J4. Stirling and Ivatt 5'2" 0-6-0's with smaller 4'4" diameter boilers. No less than 302 of these engines were built by the G.N.R. between 1873 and 1901 and another 12 were constructed for the Midland & Great Northern Joint Railway in 1900 to the same design. These were absorbed into L.N.E.R. stock in 1937. The Stirling engines originally had domeless boilers and round-top cabs. Nos. 64160/2/7 were formerly M. & G.N.J.R. Nos. 85, 87 and 92. The last J4, No. 64112, was scrapped in 1951.
Wheel Arrangement 0-6-0
Number Built as J4 315
Conversions to other classes 165
Last in Service 25/11/1950
Manufacturers
ManufacturerTotal
Dübs & Co 105
Doncaster Works 170
Kitson 25
Vulcan Foundry 15
Orders
BuilderSponsorOrder #DateSize
Doncaster Works  n/a 1873 2
Doncaster Works  n/a 1874 5
Doncaster Works  n/a 1875 9
Doncaster Works  n/a 1876 2
Doncaster Works  n/a 1878 5
Doncaster Works  n/a 1879 7
Doncaster Works  n/a 1880 5
Doncaster Works  n/a 1881 3
Dübs & Co  n/a 1882 20
Vulcan Foundry  n/a 1882 15
Doncaster Works  n/a 1886 10
Doncaster Works  n/a 1887 8
Doncaster Works  n/a 1888 8
Doncaster Works  n/a 1889 8
Doncaster Works  n/a 1890 7
Doncaster Works  n/a 1891 16
Doncaster Works  n/a 1892 11
Doncaster Works  n/a 1893 2
Doncaster Works  n/a 1894 2
Doncaster Works  n/a 1896 10
Dübs & Co  n/a 1896 15
Dübs & Co  n/a 1897 4
Dübs & Co  n/a 1898 6
Dübs & Co  n/a 1898 2
Doncaster Works  EO208 1898 10
Dübs & Co  n/a 1899 33
Doncaster Works  EO217 1899 20
Doncaster Works  EO220 1900 20
Kitson  n/a 1900 25
Dübs & Co  n/a 1901 25
Classification Southern Area 2
Route Availability 3
BR Power Class 2F
Engine Diagrams
DiagramDetails
Section N, 1924 2,800 gallon tender. Amended 12/1939 to show alternative boiler pressure of 175 as well as 170 lb. per sq. in.
Section N, 1939 M. & G.N. engines converted to J4. 3,170 gallon tender, lower chimney and dome heights, extended smokebox.

Illustration
Copyright: John Sutters c/o Phil Seaford
Power
Variant Introduced 1873
Tractive Effort 18,560lbs
Inside Cylinders 17.5" x 26" (2 off)
Inside Valves Slide
Inside Motion Stephenson

Wheels
Drivers 5' 2"
Locomotive Wheelbase 15' 6"
Tender Wheelbase 13'
Total Wheelbase 36' 111⁄2"
Descriptive Wheelbase 7' 3" + 8' 3" + 8' 5½" + 6' 6" + 6' 6" = 36' 11½"

Dimensions
Length (over buffers) 49' 2"
Weight (in running order) 76t 3cwt
Weight (loco only) 41t 5cwt
Adhesive Weight 41t 5cwt
Maximum Axle Load 15t 4cwt
Water Capacity 2,800gal
Coal Capacity 5t 0cwt

Boiler & Firebox
Boiler Diagram 11
Boiler Max Diameter 4' 5"
Boiler Barrel Length 10' 1"
Boiler Pressure 175lbs
Boiler Pitch 7' 33⁄4"
Firebox Length 5' 6"
Firebox Grate Area 16.25ft2
Firebox Heating Surface 103ft2
Tube Number 213
Tube Diameter 13⁄4"
Tube Area 1016ft2
Total Evaporative Area 1119ft2