GE UM12C

The UM12C is a type of diesel-electric locomotive manufactured by GE for Southeast Asian rail companies. It is currently in service with the State Railway of Thailand. It was also operated by the Manila Railroad Company (later the Philippine National Railways) from 1956 until the late 1990s. While the units for both companies feature a shovelnose layout, the MRR locomotives were single-ended and had a cowl unit cab,[5] the SRT locomotives are double-ended cab forward units.

GE UM12C[1][2]
Type and origin
Power typeDiesel-electric[3]
BuilderGE Transportation Systems[1][2][3]
Serial number32454-32463 (2001-2020; PNR)
34850-34889 (4001-4040; SRT)[1][2]
35947-35956 (4041-4050; SRT)[1][2]
ModelUM12C[1][2]
Build date1956
1963,1966[1][2]
Total produced20 (PNR)
50 (SRT)[1][2]
Specifications
Configuration:
​
 • AARC-C[2]
 • UICCo'Co'[3]
Gauge1,067 mm (3 ft 6 in) (PNR)
1,000 mm (3 ft 3 3⁄8 in) (SRT)[1][2]
Wheel diameter914 mm (36.0 in)[3]
Length16,288 mm (53 ft 5.3 in)[3]
Width2,794 mm (9 ft 2.0 in)[3]
Height3,753 mm (12 ft 3.8 in)[3]
Loco weight70.178 ton (empty)[3]
75.00 ton (in working order)[3]
Prime moverCummins KT38L (SRT)
Cooper Bessemer (PNR)
RPM range2,000 RPM[3]
CylindersV12[2]
Train brakesCombined air brake[3] and vacuum brake[3]
Performance figures
Maximum speed103 km/h (64 mph)[3]
Power output1,320 hp (0.98 MW)[3]
Career
OperatorsPhilippine National Railways
State Railway of Thailand[1][2]
Numbers2001-2020 (PNR)
4001-4050 (SRT) [1][2][3]
Official nameGE[3]
LocalePhilippines
Thailand[1][2]
DeliveredFebruary - June 1956 (PNR)
1964 (SRT)[3]
DispositionAll Scrapped (PNR)
45 in service, 5 retired (SRT)[4]

References
  1. Dave Dallner (November 20, 2010). "General Electric UM12C Production Roster".
  2. Phil's Loco Page (July 4, 2015). "GE Export".
  3. "SRT Diesel locomotive". September 6, 2013. Archived from the original on December 19, 2016. Retrieved July 4, 2015.
  4. ฝ่ายช่างกล การรถไฟแห่งประเทศไทย (July 3, 2015). "รายงานสถานการณ์รถจักร ของการรถไฟแห่งประเทศไทย ประจำเดือนกรกฏาคม 2558".
  5. "1956 0421 MRR Roadswitchers". Retrieved February 15, 2020.
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