| Power Classification | 4MT |
| Introduced | 1932 |
| Designer | Churchward |
| Company | GWR |
| Weight – Loco | 65t 6cwt |
| Tender | 40t 0cwt |
| Driving Wheels | 5ft 8ins |
| Boiler Pressure | 2000psi superheated |
| Cylinders | Outside – 18.5in x 30in |
| Tractive Effort | 25,670lbf |
| Valve Gear | Stephenson (piston valve) |
These locomotives were a variation of the 4300 class with altered weight distribution and side window cabs.
The 9300 class was built new with the same weight modifications as the 8300 class and in addition they had side window cabs and outside steam pies. Between 1956 and 1959 they had their ballast weights removed and they were renumbered 7322-7341.
Preservation
9303 is the only one of the original 9300 class which has been preserved as 7325. See 4300 class for details.
