Pennsylvania Railroad Baldwin RT-624 8725 at Overbrook, Pennsylvania, October 26, 1952. Photographer unknown.

(Craig Garver, Public domain,



The BLH RT-624 was a twin-engine center-cab diesel-electric locomotive, built by Baldwin-Lima-Hamilton Corporation between August 1951 and February 1954.

The RT-624, an improved version of the former Baldwin DT-6-6-2000, was a center-cab transfer locomotive. Twenty-four locomotives were built using 6-cylinder turbocharged 606A prime movers during 1951–1954. Penn Central operated ex-PRR No. 8955, and was retired in October 1969, and scrapped in July 1970.

No examples of the RT-624 are known to survive.


MNS 25 a rare Baldwin RT-624 built July 1953, shown here on the Minneapolis, Northfield and Southern Railway, June 1964.

(© 2024 Marty Bernard, All Rights Reserved, Used by permission.


Original buyers

Railroad Quantity Road numbers Notes
Pennsylvania Railroad 23 8113, 8724–8731, 8952–8965
Minneapolis, Northfield and Southern Railway 1 25
Total 24

RT-624 Overview

Type and origin
Power type: Diesel-electric
Builder: Baldwin-Lima-Hamilton Corporation
Model: RT-624
Build date: August 1951 to February 1954
Total produced: 24
​• AAR C-C
• UIC Co′Co′
Gauge: 4 ft 8+1⁄2 in (1,435 mm)
Trucks: GSC 13-ft rigid bolster
Length over couplers: 74’
Locomotive weight: 354,000–375,000 lb (161,000–170,000 kg)
Power supply: 75 V
Prime mover: 606A × 2
RPM: ​Maximum RPM 625
Engine type: Four-stroke diesel
Aspiration: Turbocharger Elliott Company H503 (215 hp)
Generator: Westinghouse YG42B
Traction motors: Westinghouse 370DEZ (x 6)
Cylinders: 6 × 2
Performance figures
Power output: 2,400 hp (1,800 kW)
Tractive effort starting: 106,200 lbf (472.40 kN)
Tractive effort continuous: 72,900 lbf (324.28 kN)
Operators: Pennsylvania Railroad, Minneapolis, Northfield and Southern, Penn Central
Class: PRR- BS24m
Nicknames: Center Cab
Disposition: All scrapped