Southern Pacific 1518

Southern Pacific 1518

1518 in operation at Illinois Railway Museum in 2005

Type and origin Power type Diesel Builder General Motors Electro-Motive Division (EMD) Model SD7 Build date May 1951

Specifications Configuration: ​  • AAR C-C Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Length 60 ft 8 in (18.49 m) Width 10 ft 8 in (3.25 m) Height 14 ft 1 in (4.29 m) Prime mover 645CE Engine type V16 diesel Cylinders 16

Performance figures Power output 1,500 hp (1,100 kW)

Career Operators Southern Pacific Railroad Class DF-116 Numbers 1518 Delivered October 1952 Current owner Illinois Railway Museum Disposition operates in excursion service

Southern Pacific Railroad's (SP) number 1518 is an EMD SD7 diesel locomotive. It was built originally in May 1951 as General Motors Electro-Motive Division's (EMD) Demonstrator #990. It was the first "SD" series locomotive ever built. Its road number 990 is in reference to its EMD Engineering Department Project Number: 15990. It demonstrated on several roads before being sold to Southern Pacific on 10/10/52 and sent back to EMD for refurbishing and repainting in SP's tiger stripe paint and renumbering as #5308. It was classified in one-unit class DF-116 as it was slightly different from all the other SD7s. It entered service at Ogden, UT on 10/23/52 and was immediately sent to work on SP subsidiary Northwestern Pacific Railroad alongside SP's other SD7s.

As delivered, it had dual control stands, a winterization hatch over the forward fan and two single A-200 "blat" horns mounted on the roof of the long hood directly behind the cab. SP added a steam generator inside the short hood and a large "beer barrel" or "trash can" Mars signal light above the headlight on the front of the short hood. In the mid-1950s SP repainted it in the "black widow" paint scheme, then into the scarlet and grey scheme about 1959. Since it still had dual control stands, the painted feathers were applied to both ends. It was the only SD7 to have feathers at both ends denoting two control stands for bi-directional operation, similar to the San Francisco-San Jose, California commute GP9s.

In the early 1970s it was repainted without the rear feather, although it retained its dual control stands. SP renumbered the locomotive to #2715 in 1965, then to #1415 in 1/74 when the EMD MP15AC deliveries approached the 27xx numbers. In the late Sixties, the two A-200 horns were replaced by a Nathan P3 on the right side and a Nathan M5 on the left side. Also at some point during the late Sixties, the large Mars signal light was replaced with an end mounted Pyle National sealed-beam Gyralight.

The locomotive was rebuilt at the Sacramento General Shops as an SD7R in 1980 and renumbered to #1518, and was released for service on 2/5/80. In this rebuild, it lost its dual control stands, dual horns and winterization hatch.