Southern Pacific No. 7546

Southern Pacific No. 7546 was an SD45R diesel locomotive built by the Electro-Motive Division (EMD) for the Southern Pacific Railroad in January 1970. 
==History==
Southern Pacific No. 7546 was built in January 1970 and entered service on the Southern Pacific Railroad the same year in 1970.
When it was first built, it was first built as SD45 #9134 and given the classification of EF636-6, but due to the massive 20-cylinder engines causing them to have a very bad fuel mileage and coupled with the crankshaft failures, it was rebuilt into an EMD SD45R and renumbered from 9134 to 7546 in May 1985, it would be reclassified as EF636LR-3.
It had lasted into the days of Union Pacific when Southern Pacific and its parent company Rio Grande Industries had merged into Union Pacific.
It would be retired from service on the Union Pacific and was offered to Montana Rail Link (MRL) where it was renumbered by Montana Rail Link as #320.
Category:EMD SD45R
Category:EMD SD45
Category:Southern Pacific locomotives
Category:Locomotives
Category:Diesel locomotives
Category:4 foot 8 1⁄2 inch gauge
Category:Standard gauge locomotives
Category:Built in 1970
Category:Six-axled diesel locomotives
Category:United States
Category:American locomotives
Category:MRL Locomotives
Category:Preserved diesel locomotives
Category:Union Pacific
Category:Freight locomotives
Category:EMD locomotives
Category:Union Pacific locomotives
Category:Standard gauge locomotives of the United States
Category:Southern Pacific Class EF636-6
Category:Montana Rail Link
Category:C-C locomotives
Category:American diesel locomotives
Category:Diesel-electric locomotives