GP16

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GP16
GP16
Seaboard System Railroad #1786, a GP16 rebuild in its original paint scheme -- Mulberry, Florida.
Power type Diesel-electric
Builder General Motors Electro-Motive Division (EMD);
rebuilt by the Seaboard Coast Line Railroad
Model GP16
Build date June 1979 —
November 1982
Total production 156
AAR wheel arr. B-B
Gauge 4 ft 8½ in (1,435 mm)
Length 56 ft 0 in (17.07 m)
Locomotive weight 258,000 lb (117,000 kg)
Prime mover EMD 645
Engine type 2-stroke diesel
Transmission DC generator,
DC traction motors
Top speed 65 mph (105 km/h)
Power output 1,600 hp (1,194 kW)
Tractive effort 64,500 lbf (287 kN)
Locomotive brakes straight air
Train brakes 26L air
Locale North America

The Uceta GP16 was a series of rebuilt diesel-electric locomotives. Initiated by the Seaboard Coast Line Railroad in an effort to spare the cost of purchasing new motive power in the late 1970s. This involved the rebuilding of their aging fleet of 156 EMD GP7, GP9, and GP18 road switchers (many of which were over twenty years old).

Contents

[edit] The Program

The required modifications, which took nine weeks per unit on average to complete. The program resulted in a cost savings of almost 50% over buying new locomotives.

Included in the program:

  • Rebuilding the underframe assembly;
  • Remanufacturing the Blomberg B two-axle trucks, generators, and traction motors (all GP16s were configured with a B-B wheel arrangement);
  • Replacing the existing 567 prime mover with a new EMD 645 series diesel engine, which boosted the horsepower rating to 1,600 in the case of the former GP7 locomotives. This gave rise to the 16 designation.
  • Removal of the dynamic brakes, and installation of a new type 26L air brake system.
  • Installation of a new high-voltage cabinet.
  • Lowering the front nose of the carbody to improve visibility, and retrofitting with a new cab and standard AAR control stand.

Ancillary benefits included a lowered engine idling speed and increased fuel efficiency. SCL committed over 100 of its personnel to the conversion program. The first GP16 emerged from SCL's Uceta (Tampa) shop in June, 1979 while the last was placed into service during November, 1982.

[edit] In service

The rebuilt locomotives saw service throughout the system, engaging in a variety of duties from local switching to main-line freight hauling. Though SCL became part of the CSX Transportation system in the 1980s, the majority of the units remained active until 1992, when the bulk of the roster was retired and sold-off. Many GP16s remain in active service today on short line railroads around the country, far exceeding their 15-year projected lifespan.

A plate Conrail put on USAX 4635, a GP16 at Fort Eustis, Virginia. This locomotive was "remanufactured" in 1993.
A plate Conrail put on USAX 4635, a GP16 at Fort Eustis, Virginia. This locomotive was "remanufactured" in 1993.

In 1993 the U. S. Army bought a small number of GP16s from CSX, which lead some people to think the Army built it. The locomotives were sent to Conrail's Junita Locomotive shops to be 'remanufactured' under contract with the Army. When they were completed, Conrail put a GP9M plate on them.


Former Seaboard Coast Line Railroad #1821, a GP16 conversion, wears CSX colors after the 1986 merger.

CSX sold many GP16's to the U. S. Army (AAR reporting mark USAX) and today #4635 serves at Fort Eustis, VA.

Rail Link, Inc. #444, a GP16 rebuild, works on the Commonwealth Railway in Suffolk, Virginia.

Buckingham Branch Railroad #2, a GP16 rebuild, rests at Dillwyn, Virginia.


[edit] Footnote

In the late 1960s through the early 1970s, the Missouri Pacific Railroad repowered their entire roster of high-hood ALCO RS-11s with EMD 567 series diesel engines. These converted units were designated by the MP as "GP16s" presumably to reflect their new horsepower rating.

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