KLW SE24B

The KLW SE24B or KLW SE20B is a low-emissions diesel switcher locomotive built by Knoxville Locomotive Works (KLWX). It is powered by a single MTU Series 4000 12V R54 (TIER 3) diesel engine which develops a total power output of 2,400 horsepower (1,790 kW). To date, one SE20B locomotive has been produced for KLWX, and it operates on the Gulf and Ohio Railways.^[2] Furthermore, at least 6 SE24B locomotives have also been produced, including for the San Joaquin Valley Railroad.^[3]

KLW SE20B KLW SE24B[1]
Type and origin Power type Diesel-electric Builder Knoxville Locomotive Works Model SE20B SE24B Build date 2011 – present Total produced 1 SE20B demonstrator 6+ SE24Bs
Specifications Gauge 4 ft 8+1⁄2 in (1,435 mm) Prime mover MTU Series 4000 12V R54
Performance figures Power output SE20B: 2,250 hp (1,680 kW) SE24B: 2,400 hp (1,790 kW)
Career Operators See list

Original buyers

SE20B

Railroad	Quantity	Road numbers	Notes
Knoxville Locomotive Works[4]	1	KLWX 2250	Demonstrator. Rebuilt from ex-NS EMD GP38 2002[2]
Total	1

SE24B

Railroad	Quantity	Road numbers	Notes
San Joaquin Valley Railroad[3]	6	2405-2410	Acquired beginning in 2019. Rebuilt from ex-CSX NRE 3GS21B and 2GS14B locomotives
California Northern Railroad	3	2401-2403	Acquired beginning in 2019. Rebuilt from ex-CSX NRE 3GS21B locomotives
Total	+9

See also

• Knoxville Locomotive Works
• National Railway Equipment, which originally manufactured the locomotives used to produce the SE24Bs