Although Alco had ceased US locomotive production in 1969, many of the company's products were passed on to Conrail on April 1 1976. Conrail continued to use these locomotives into the 1980s. This album also includes Conrail's slug units made from Alco products, and the RS3m, Penn Central and Conrail's rebuilt RS3 roadswitchers.
Conrail's yard slugs, the 4 axle MT4 and 6 axle MT6 were rebuild from ALCO units to perform low speed switching duties. Most of the MT4s were retired by the end of Conrail's era, but, after a truck swap, the MT6s served on for their new owners.
ALCo built the 3,000hp C630 from 1965-1968. Conrail got 15 of the ALCo 251E V16-powered units from Penn Central and 12 from the Reading. Conrail assigned them the numbers 6753 to 6779.
Built from Feb 1956 to June 1961, the 1800hp 251B-powered ALCO RS11 gave strong competition to EMD's GP-9.
Even with it's quicker acceleration and higher tractive effort, the versatile RS-11 wasn't ultimately as successful as EMD's GP-9, and as a result Conrail inherited fewer of them than their GM counterparts. Being from a defunct manufacturer, they also became candidates for earlier retirement than the geeps as well.
Four RS11's were painted CR blue: 7630, 7644, 7651 and 7652.
ALCO built the 1,500hp RS-2 from October, 1946 -May, 1950 and the 1,600hp RS-3 from May, 1950 -August, 1956. The ALCO 12-cylinder 244B prime mover powered the RS-2 while the 244D powered the RS-3. The initial CR roster listed RS-2's as 5200-5217 for inherited EL and LV units, and listed RS-3's as 5229-5593 for inherited CNJ, EL, LV, and PC units. These units were all either rebuilt as RS3ms, or retired by the early 1980s.
Conail's RS3ms were products of a rebuilding process started by Penn Central. They were ALCO RS3s that had their prime movers and electrical equipment replaced with that from EMD units, causing their distinctive looks.
Conrail inherited 25 ALCo RSD-12's built for the PRR, with the PC number series 6855-6879. Their ALCo 251B V12 prime movers produced 1,800hp.
Conrail inherited 6 ALCo RSD-15's built for the PRR, with the PC number series 6811-6816, but placed only 6812-6816 on the April, 1976 roster. Their ALCo 251B V16 prime movers produced 2,400hp.