Lehigh Valley 630 and 631, both Alco Century 628s, at Newark, NJ yards, November 8, 1969.

(Roger Puta, courtesy Marty Bernard, Public Domain, via Wikimedia Commons)


Alco logo


The ALCO Century 628 was a six-axle, 2,750 hp (2,051 kW) diesel-electric locomotive. A total of 186 C628s were built between December 1963 and December 1968. There were 135 C628s built for US railroads, 46 C628s built for Mexican railroads, and five C628s for Australia.

The C628 replaced the C624 (DL600C/RSD-41) as a part of ALCO's 'Century' line of locomotives. The C624 was intended to replace the earlier RSD-15 model, but was never built. The C628 was offered instead in August 1963.

Hamersley Iron purchased five to haul iron ore services in the Pilbara region of Western Australia. Two were built in Schenectady and three by AE Goodwin in Sydney. All had been retired by 1982, with one preserved on a plinth in Dampier.

The Southern Pacific purchased the four demonstrators in 1964, and an additional 25 C628s were delivered in 1965.


Hamersley Iron 20 class locomotive at 7 Mile Yard entrance, Dampier, Western Australia. Date 31 July 2003.

(Nachoman-au, CC BY-SA 3.0 <http://creativecommons.org/licenses/by-sa/3.0/>, via Wikimedia Commons)



No. 2000 has been preserved by the Pilbara Railways Historical Society.
North America
Ferrocarriles Nacionales de Mexico 606, formerly Ferrocarril de Pacifico 606, is preserved at the Yucatán Railway museum in Mexico.


Southern Pacific Alco C628 3133 at Colton, California, August 1, 1975. Photographer: Peter Arnold.

According to one source, these soon went from heavy haul status to switching duties.

(Craig Garver, Public domain, https://www.flickr.com/photos/digitalrailartist/51589228662/in/dateposted/)


Original Owners

Railroad Quantity Road Numbers Phase Notes
Atlantic Coast Line 4 2000-2003 I Delivered without d/b, installed 1966-67; to SCL same Nos., then L&N 7513-7516.
Atlantic Coast Line 7 2004-2010 I to SCL same #s, then L&N 7517-7523
ALCO 4 628-1 to -4 I to SP 4870-4873, re# 7100-7103(1965), re# 3110-3113 (1972-74)
Ferrocarril Chihuahua al Pacífico 3 901-903 IIb
Ferrocarril Chihuahua al Pacífico 1 904 IIb
Delaware & Hudson 1 601 I leased, then sold to NdeM(1978)
Delaware & Hudson 3 602-604 I leased, then sold to NdeM(1978)
Delaware & Hudson 2 605, 606 I leased, then sold to NdeM(1978)
Delaware & Hudson 3 607-609 I leased, then sold to NdeM(1978)
Delaware & Hudson 9 610-618 IIa leased, then sold to NdeM(1978)
Ferrocarril del Pacifico 6 601-606 IIb
Ferrocarril del Pacifico 4 607-610 III
Hamersley Iron (Australia) 3 2000-2002 IIa
Hamersley Iron (Australia) 2 2004, 2005 IIb
Louisville & Nashville 8 1400-1407 I
Louisville & Nashville 4 1408-1411 I
Louisville & Nashville 3 1412-1414 IIa
Lehigh Valley 7 625-631 IIb to CR 6721-6727
Lehigh Valley 1 632 IIb to CR 6728
Monon 9 400-408 I traded in on C420s(1967); resold to LV 633-641, to CR 6729-6737
Ferrocarriles Nacionales de México 10 8300-8309 IIb
Ferrocarriles Nacionales de México 12 8310-8321 III
Ferrocarriles Nacionales de México 10 8322-8331 III
Norfolk & Western 10 1100-1109 IIb high short hood; sold to C&NW 6701-6710(1973)
Norfolk & Western 20 1110-1129 IIb high short hood; sold to C&NW 6711-6730(1973)
Pennsylvania Railroad 10 6300-6309 I to PC same #s, then CR 6738-6747
Pennsylvania Railroad 5 6310-6314 IIa to PC same #s, then CR 6748-6752
Southern Pacific 25 4845-4869 IIa Re# 7104-7128(1965); re# 3114-3136 (1972-74); 7121 rblt to slug 1000; 7115 rblt to slug 1001.
Total 186

Legend - Phases:
I - Rain shield over central air intake, angled cab across entire width, shorter length 51" door set on engineer's side below exhaust stack.
IIa - No rain shield, angled cab, shorter length 51" door set on engineer's side below exhaust stack.
IIb - No rain shield, angled cab, 74" door set on engineer's side below exhaust, same height as engine compartment doors.

III - No rain shield, cab angled only in center windshield section (like C630 and C636) resulting in slightly longer cab walls.

Source: Sarberenyi, Robert. Alco C628 Original Owners



Type and origin
Power type: Diesel-electric
Builder: ALCO
Model: DL628
Build date: December 1963 - December 1968
Total produced: 186
​• AAR C-C
Gauge: 4 ft 8+1⁄2 in (1,435 mm)
Prime mover: Alco 16-251C
Generator: 586A4 or 586C1R
Traction motors: 752E6A
Performance figures
Power output 2,750 hp (2,051 kW)