ALCO Century 636

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**ALCO Century 636**
Power type	Diesel-electric
RPRX 78, now NYSW 3660 is on the point of SU-100 at Ridgefield Park, New Jersey, September 2005. (Photo by John Eric Durant)
Builder	ALCO
Model	Century 636
Build date	1967 – 1968
Total production	34
AAR wheel arr.	C-C
Gauge	4 ft 8½ in (1435 mm)
Power output	3600 hp (2.7 MW)

The ALCO Century 636 was the most powerful single-engine diesel locomotive constructed by ALCO. The locomotive had a C-C wheel arrangement and 3600 horsepower (2.7 MW). The locomotive rested on a pair of trucks of all-new design, known as the Hi-Ad, standing for 'high adhesion'. Visually, it is almost identical to the Century 630.

Alco Products' 'HiAd' truck design, all new for the Century 636 model. (Photo by Alco Products, Inc.)

1 Production
2 Original Owners
3 Current usage
4 References

[edit] Production

The production of only 34 Alco C636s, built in 1967 and 1968 reflected Alco's dwindling locomotive market share. Dispite many new and innovative features, the C636 couldn't hold its own. 3 demonstrators were built using about $5.5 million 2006 of Alco's own money. 636-2, ironically the only ex-Demo operating, was a factor in repelling potential customers. During evaluation on the Santa Fe Railway, the same traction motor blower on 636-2 failed (which causes engine shutdown) and was replaced on three of four runs, and had other unsatisfactory results while testing on the Southern Pacific Railroad.

A.E. Goodwin in Australia built 29 C636s between May 1968 and October 1970 for the Pilbara Iron Ore railroads. Hamersley Iron purchased 12 units in 5 separate orders. Bechtel purchased 5 C636s to aid in the construction of the Mt. Newman Mining facilities. The latter company ordered 12 C636s of their own a year later and bought Bechtel's locomotives.

[edit] Original Owners

Railroad	Road #.
Alco Products (demonstrator units)	636-1—636-3
Illinois Central Railroad	1100-1105
Penn Central	6330-6344
Spokane, Portland and Seattle Railway	330-335, 340-343
Hamersley Iron	2006-2017
Bechtel	001-0001—001-0005
Mt. Newman Mining	5457-5468

[edit] Current usage

As of 2006, the Delaware-Lackawanna Railroad (DL) and the New York, Susquehanna and Western Railway (NYSW) own ALCO C636s. The Delaware-Lackawanna C636, number 3642, is formerly Conrail 6792. The New York, Susquehanna and Western Railway owns 2 ALCO C636s assigned numbers 3660 and 3662. The 3660 is former Quebec Cartier Mining number 78 and had been temporarily numbered RPRX 78. NYSW 3662 is former Quebec Cartier Mining number 77. The 3662 has yet to be renumbered and has been out of service due to freeze damage as of 2005. Both the Delaware-Lackawanna and the New York, Susquehanna and Western Railway also own MLW M636s built by the Montreal Locomotive Works in Montreal, Canada.^{[citation needed]}

[edit] References

Sarberenyi, Robert. Alco C636 Original Owners.

v • d • e Diesel-electric locomotives built by ALCO
Switchers:	HH series, S-1, S-2, S-3, S-4, S-5, S-6, T-6, SB-8/SSB-9
RS series:	RS-1, RS-2, RS-3, RS-11, RS-27, RS-32, RS-36
RSC series:	RSC-2, RSC-3
RSD series:	RSD-1, RSD-4, RSD-5, RSD-7, RSD-12, RSD-15
Cab units:	DL-103b, DL-105, DL-107, DL-109, DL-110, DL-203, FA, FB, PA, PB
Century series:	C415, C420, C424, C425, C430, C628, C630, C636, C855
Diesel-hydraulics:	DH643