Class 90 (MacArthur) 2-8-2
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| Origin | U.S. Army Transportation Corps | Builder | Alco, Baldwin, Davenport (USA) |
| FMSR Class | n/a | Cylinder | 16 x 24 inches |
| FMSR Number range | Not allocated; ran with USATC numbers | Boiler Pressure | 185 psi |
| KTM Class | 90 | Driving Wheel Diameter | 48 inches |
| KTM Number range | 901.01-901.25 | Water Capacity | 4,168 galons |
| Introduced | 1944 | Weight Full | 52 tons |
| Extinct | c1973 | Tractive Effort | 20,100 lb |
The famous American "MacArthur" 2-8-2 heavy freight locos were introduced to the Far East during and after World War 2. They could be seen in many Asian countries including Burma, Thailand, India, and The Phillipines. Odd examples even found their way to Africa and New Zealand. A total of 48 examples worked in post-war Malaya under the ownership of the USA Transportation Corps. In 1946 28 were sold to the Malayan Railway, and 20 to Thailand. In 1948/9, 16 of the Malayan locos were sold to the Tanganyika Railway, subsequently part of East African Railways, leaving 12 in Malaya. Some of these lasted to the end of steam on KTM in the 1970s.