Pennsylvania Railroad Lima Centercab 5676 at Indianapolis, Indiana, March 24, 1966. Photographer unknown.

(Craig Garver, Public domain,


Lima Hamilton logo.

Lima LT-2500 - A-3177 (1950–1951)

The A-3177 (LT-2500) was a diesel-electric transfer-unit locomotive, built by the Lima-Hamilton Corporation between 1950 and 1951. The A-3177 was the final locomotive model produced by Lima-Hamilton before the company merged with the Baldwin Locomotive Works in September 1951 to form the Baldwin-Lima-Hamilton Corporation (BLH).

All twenty-two units were ordered by the Pennsylvania Railroad, with the last one, No. 5683, completed on September 12, 1951, the day after BLH was formed. All were scrapped, with the last three being retired by 1967. The PRR ordered 22 more but agreed to receive 23 RT-624s from BLH instead.


Lima-Hamilton locomotive No. 5671 built for the Pennsylvania Railroad in 1950. The locomotive had 2500 hp.

(Lima Locomotive Works, Public domain, via Wikimedia Commons)



Type and origin
Power type: Diesel-electric
Builder: Lima-Hamilton Corporation
Model: A-3177 (LT-2500)
Build date: May 1950 – September 1951
Total produced: 22
โ€‹• AAR C-C
• UIC Co′Co′
Gauge: 4 ft 8+1⁄2 in (1,435 mm)
Length: 73’ 0”
Prime mover: Hamilton Engines and Machinery T89SA (2)
Engine type: 4-stroke diesel
Aspiration: Turbocharged
Displacement: 6,107 cu in (100.08 L) each
Generator: Westinghouse 480C
Traction motors: Westinghouse 370G (6)
Cylinders Inline 8 (2)
Cylinder size: 9 in × 12 in (229 mm × 305 mm)
Locomotive brake: Straight air
Train brakes: Air
Performance figures
Power output: 2,500 hp (1,860 kW)
Operators: Pennsylvania Railroad
Class: LS25m
Numbers: 5671–5683, 8943–8951
Disposition: Scrapped