Most of the engines were modified by fitting larger water tanks. This increased the total capacity from 1371 gallons to 1630 gallons. Three engines still had their original tanks at the 1923 Grouping.
Air brakes were fitted to 10 locomotives between 1900 and 1923. The same engines received vacuum brakes as well, between 1928 and 1931.[1]
Use
The N9s were used on local goods trains.
Numbering
This section needs expansion. You can help by adding to it. (December 2014)
Seventeen locomotives passed into British Railways ownership in 1948 and their BR numbers are shown in the table below.[2]
NER
LNER
BR
1617
9410
69410
1618
9411
69411
1640
9412
-
1641
9413
69413
1642
9414
69414
1643
9415
69415
1644
9416
-
1645
9417
-
1646
9418
69418
1647
9416
69419
1648
9420
69420
1649
9421
69421
1650
9422
69422
1651
9423
69423
1652
9424
69424
1653
9425
69425
1654
9426
69426
1655
9427
69427
383
9428
69428
1705
9429
69429
Withdrawal
Withdrawals took place between 1946 and 1955. None were preserved.