ALCO DL420

ALCO DL420 (S-5 prototype)

Type and origin
Power type	Diesel-electric
Builder	ALCO
Model	S-5

Specifications
AAR wheel arr.	B-B
Gauge	4 ft 8 ¹⁄₂ in (1,435 mm)

Performance figures
Power output	800 hp (600 kW)

The ALCO DL420 was the prototype ALCO S-5 switcher diesel-electric locomotive.

It was built in August, 1951 using an early six-cylinder 251 engine rated at 800 horsepower (600 kW) and RS-3 subassemblies in its construction. It rode on two-axle trucks, having a B-B wheel arrangement, and was the first ALCO switcher with a front radiator opening. This one-of-a-kind unit spent its time at the Niskayuna, test facility and then at Schenectady as a shop switcher (#6). The unit was scrapped in the late 1950s.

References

Diesel-electric locomotives built by ALCO

Switchers	ALCO 300 ALCO 600 HH600 HH660 HH900 HH1000 S-1 S-2 S-3 S-4 DL420 S-5 S-6 T-6 SB-8/SSB-9

RS, RSC and RSD series	RS-1 RS-2 RS-3 RS-11 RS-27 RS-32 RS-36 RSC-1 RSC-2 RSC-3 RSD-1 MRS-1 RSD-4 RSD-5 RSD-7 RSD-12 RSD-15

Cab units	Rebel power car DL-103b DL-105 DL-107 DL-108 DL-109 DL-110 DL-202 DL-203 FA FB PA PB

Century series	C415 C420 C424 C425 C430 C628 C630 C636 C855

Diesel-hydraulics	DH643

Export locomotives	DL560C RSD-39

Unproduced locomotives	C428 C620 C624 C636F C636P C650DH

List of ALCO diesel Locomotives

Diesel and gas turbine locomotives built by MLW

Early switchers	S-2 S-3 S-4 S-7 S-10 S-11 S-12 S-13

Cab units	FA-1 FB-1 FA-2 FB-2 FPA-2 FPB-2 FPA-4 FPB-4

Roadswitchers	RS-1 RS-2 RS-3 RSC-3 RS-10 RS-11 RSD-12 RS-13 RSC-13 RSC-14 RSD-17 RS-18 RS-23 RSC-24 RSD-35

Century series	C-415 C-424 C-630M

M series	M-420 M-420B M-420R M-420TR M-420TR-2 M-424 M-630 M-636 M-640

Other designs	DL500S DL535E M420 TURBO LRC-2 LRC-3 E-1800

Bombardier designs	HR-412 HR-616

(See also: List of MLW diesel locomotives)

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ALCO DL420

See also

References