Lima 750 and 800 hp switchers

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Lima LS-750 and LS-800
Cincinnati Union Terminal 25, Lima A-3149 (LS-750).JPG
Cincinnati Union Terminal railroad number 25, a Lima LS-750 (A-3149)
Type and origin
Power type Diesel-electric
Builder Lima Locomotive Works
Model A-3149 (LS-750)
A-3171 (LS-800)
Build date November 1949 – June 1951
Total produced LS-750: 6
LS-800: 23
AAR wheel arr. B-B
UIC class Bo′Bo′
Gauge 4 ft 8 12 in (1,435 mm)
Prime mover Hamilton T69SA
Engine type 4-stroke diesel
Aspiration Turbocharged
Displacement 4,580 cu in (75.1 l)
Cylinders Inline 6
Cylinder size 9 in × 12 in (229 mm × 305 mm)
Transmission DC generator,
DC traction motors
Loco brake Straight air
Train brakes Air
Performance figures
Power output 750 hp (559 kW) or
800 hp (597 kW)
Locale United States

The Lima 750 and 800 hp switchers were diesel-electric switching locomotives built between November 1949 and June 1951, by Lima Locomotive Works of Lima, Ohio, U.S.A.. The LS-750 is a 750 horsepower (560 kW) switcher. It was later upgraded to 800 hp (600 kW) by changing fuel rack settings. Both models used the same turbocharged Hamilton T-69-SA four-stroke, six cylinder inline diesel engine, a Westinghouse generator and 4 Westinghouse traction motors.

All six LS750s were sold to a single railroad, with two being sold after the LS-800 had been introduced. The 23 LS-800s were sold to just two railroads.

Lima-Hamilton did not assign model numbers to their models but referred to them by specification numbers. Model designations such as LS-750 or LS-800 were a railfan invention. Lima-Hamilton assigned A-3149 as the specification number for the 750 hp model, and A-3171 as the specification number for the 800 hp model.

Original owners[edit]


Railroad Qty Road Numbers Notes
Cincinnati Union Terminal (Whitewater Valley Railroad)


Railroad Qty Road Numbers Notes
Chicago, Rock Island and Pacific Railroad
Chicago River and Indiana Railroad
(subsidiary of New York Central Railroad)


The last extant LS750, former Cincinnati Union Terminal 25, is operated by the Whitewater Valley Railroad