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Specifications
Specifications
Configuration:;
• Whyte	4-6-2
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Leading dia.	36 in (914 mm)
Driver dia.	80 in (2,032 mm)
Trailing dia.	50 in (1,270 mm)
Wheelbase	13 ft 10 in (4.2 m) between driving axles
Length	83 ft 6 in (25.5 m)
Axle load	66,500 lb (30,200 kg; 30.2 t)
Adhesive weight	199,500 lb (90,500 kg; 90.5 t)
Loco weight	304,500 lb (138,100 kg; 138.1 t)
Tender weight	212,725 lb (96,490 kg; 96.490 t)
Total weight	517,225 lb (234,609 kg; 234.609 t)
Fuel type	Coal
Fuel capacity	22 short tons (20 t)
Water cap.	11,300 US gallons (43,000 L)
Firebox:
• Grate area	69.89 sq ft (6.49 m2)
Boiler pressure	205 psi (1,413 kPa)
Heating surface	4,041 square feet (375 m2)
Cylinder size	27 in × 28 in (686 mm × 711 mm)
Valve gear	Walschaert
Valve type	Piston valves

Type and origin
Type and origin
Power type	Steam
Builder	Altoona Works
Serial number	2825
Build date	May 1914

Pennsylvania Railroad 1737
Pennsylvania Railroad 1737
	PRR No. 1737 builder's photo in May 1914
Power type
Type and origin
Power type	Steam
Builder	Altoona Works
Serial number	2825
Build date	May 1914
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-2
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Leading dia.	36 in (914 mm)
Driver dia.	80 in (2,032 mm)
Trailing dia.	50 in (1,270 mm)
Wheelbase	13 ft 10 in (4.2 m) between driving axles
Length	83 ft 6 in (25.5 m)
Axle load	66,500 lb (30,200 kg; 30.2 t)
Adhesive weight	199,500 lb (90,500 kg; 90.5 t)
Loco weight	304,500 lb (138,100 kg; 138.1 t)
Tender weight	212,725 lb (96,490 kg; 96.490 t)
Total weight	517,225 lb (234,609 kg; 234.609 t)
Fuel type	Coal
Fuel capacity	22 short tons (20 t)
Water cap.	11,300 US gallons (43,000 L)
Firebox:
• Grate area	69.89 sq ft (6.49 m2)
Boiler pressure	205 psi (1,413 kPa)
Heating surface	4,041 square feet (375 m2)
Cylinder size	27 in × 28 in (686 mm × 711 mm)
Valve gear	Walschaert
Valve type	Piston valves
Tractive effort
Performance figures
Tractive effort	44,460 lbf (197,770 N)
Factor of adh.	4.54
Operators
Career
Operators	Pennsylvania Railroad
Class	K4s
Numbers	PRR 1737;
Delivered	1914
First run	1914
Retired	1957
Disposition	Scrapped in 1960

Pennsylvania Railroad 1737 was a 4-6-2 Pacific type K4 class steam locomotive built in 1914 as the first of its class and would haul heavier passenger trains that the smaller E class 4-4-2 Atlantics could not handle such as the PRR's flagship passenger train, the Broadway Limited. In the 1930s, as the PRR had increased passenger service time tables, the trains became longer and heavier than a single K4s could handle, necessitating double-heading with a second engine. The "Standard Railroad Of The World" made attempts to replace the 1737 and its classmates with larger, more powerful classes including: K5, S1, and the T1, none of which were successful; thus, the K4s continued hauling passenger trains until the Pennsylvania Railroad replaced steam locomotives with the increasingly-popular and less-costly diesel-electric locomotives in 1957.

Commuter service

The 1737 was no stranger to commuter service. The New York and Long Branch Railroad in South Amboy, New Jersey used the K4s to haul commuter trains. When the famous electric Pennsylvania Railroad class GG1 would bring the trains from New York City's Penn Station, the K4s would take over the train and make the run from the South Amboy station to Bay Head, New Jersey.

Fate

No. 1737 was originally slated to be preserved as part of the PRR's Historical Collection at a roundhouse in Northumberland, Pennsylvania.^[2] However, by the late 1950s, No. 1737 had deteriorated to the point where the PRR deemed the locomotive in very poor condition to be preserved.^[2] Instead, the PRR quietly took another K-4, No. 3750, and renumbered it to represent No. 1737 while the real No. 1737 was broken up for scrap in 1960.^[3]