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The Class 4F 0-6-0 was a family of 0-6-0 steam locomotives[1] originally designed and built by the Midland Railway; 5 were also built for the MR's jointly owned Somerset and Dorset Joint Railway, and the MR's successor the LMS continued to build the basic design until 1941, giving a grand total of 772 engines.
The Midland Railway 3835 Class (192 engines), Nos (4)3835-4026, S&DJR Class 4F (5 engines, Nos (4)4557–61), LMS Fowler Class 4F 0-6-0]] (575 engines Nos (4)4027-4556, (4)4562-4605). A grand total of 772 engines were therefore built, numbered 3835-4605.
The main difference between the Midland built engines and the LMS built engines was that the former were right hand drive, the latter left hand drive. But, as their boilers were swapped freely between Midland and LMS built engines, some Midland engines carried left hand drive boilers, and LMS engines right hand drive boilers.
The S&DJR engines were taken into LMS stock in 1930. They were given the LMS numbers 4557-61.
Withdrawal
editAll 772 engines were withdrawn between 1954 and 1966.
| Year | MR 3835 | S&DJR 4F | LMS 4F | Total |
|---|---|---|---|---|
| 1954 | 1 | 0 | 0 | 1 |
| 1955 | 5 | 0 | 0 | 5 |
| 1956 | 8 | 0 | 0 | 8 |
| 1957 | 19 | 0 | 0 | 19 |
| 1958 | 3 | 0 | 0 | 3 |
| 1959 | 36 | 0 | 44 | 80 |
| 1960 | 8 | 0 | 41 | 49 |
| 1961 | 15 | 0 | 23 | 38 |
| 1962 | 20 | 2 | 74 | 96 |
| 1963 | 21 | 1 | 134 | 156 |
| 1964 | 35 | 0 | 151 | 186 |
| 1965 | 21 | 2 | 97 | 120 |
| 1966 | 0 | 0 | 11 | 11 |
| Total | 192 | 5 | 575 | 772 |
- ^ The Class designation here refers to the power classification rather than the engineering classification