Alco PA & PB roster

Alco PA & PB
Quantity Built: 250 PAs and 47 PBs	Production Run: June 1946 to December 1953
Info Supplied by: John Komanesky	Photograph by: John Mech
Revised: 8 Oct. 2011	New: 5 Jan. 2005
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PA-1 Production
Drawing and Data by: Jean-Denis Bachand
Original owner	Road Numbers	Qty.	Bldr Numbers	Bldr Dates
Alco (American Freedom Train)	1776	1	74696	8/47
Alco (Demo)	9077, 9078	2	75791, 75792	12/49
Atchison Topeka & Santa Fe	51L, 51B	2	75000, 75002	9/46
	52L, 52B	2	75003, 75005	12/46
	53L, 53B-55L, 55B	6	75315-75320	4-6/47
	56L, 56B	2	74688, 75322	7/47
	57L, 57B	2	75321, 74689	7/47
	58L, 58B	2	74690, 74691	8/47
	59L, 59B-62L, 62B	8	76535-76542	10-12/48
	70L-73L	4	76087-76090	2-3/48
Denver & Rio Grande Western	6001, 6003	2	74684, 74685	1, 2/47
Denver & Rio Grande Western	6011, 6013	2	74686, 74687	4/47
Erie	850-854	5	76908-76912	4/49
	855-857	3	77103-77105	9/49
	858, 859	2	77501, 77502	9/49
	860, 861	2	75793, 75794	11/49
Gulf Mobile & Ohio	290, 291	2	74682, 74683	11, 12/46
Lehigh Valley	601. 602	2	75458, 75459	3/48
	603-606	4	75460-75463	4/48
	607-612	6	75775-75780	4/48
	613, 614	2	75781, 75782	5/48
Missouri-Kansas-Texas	151A, 151C	2	76917, 76918	4/49
Missouri-Kansas-Texas	152A, 152C	2	76919, 76920	5/49
Missouri Pacific	8001-8008	8	77503-77510	10/49
New York Central	4200, 4201	2	75328, 75329	1/47
	4202	1	76086	1/48
	4203	1	76307	12/48
	4204-4207	4	76913-76916	4/49
New York Chicago & St. Louis(Nickel Plate)	180-186	7	75330-75336	12/47
New York Chicago & St. Louis(Nickel Plate)	187-190	4	75454-75457	3/48
New York New Haven & Hartford	760-769	10	76076-76085	8-9/48
	770-784	15	76312-76326	1-3/49
	785, 786	2	76906, 76907	3/49
Pennsylvania	5750A-5754A	5	74697-74701	10-11/47
Pennsylvania	5755A-5759A	5	75323-75327	11-12/47
St. Louis-Southwestern	300, 301	2	77511, 77512	11/49
Southern Pacific	6005A, 6005C	2	75783, 75784	5/48
	6006A, 6006C	2	76072, 76073	6/48
	6007A, 6007C	2	76074, 76075	7/48
	6008A,C-6010A,C	6	77097-77102	8/49
Texas & New Orleans (SP)	200A,B-202A,B	6	77085-77090	6/49
	203A, 203B	2	77091, 77092	7/49
	204A,B-205A,B	4	77093-77096	8/49
Union Pacific	604-607	4	76308-76311	1/49
Union Pacific	994A-997A	4	74692-74695	8/47
Wabash	1020, 1020A	2	77081, 77082	5/49
Wabash	1021, 1021A	2	77083, 77084	5/49
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PA-2 Production
Drawing and Data by: Jean-Denis Bachand
Alco ("More Power for America")	8375	1	75790	3/50
Erie	862, 863	2	78732. 78733	4/51
Missouri-Kansas-Texas	154A, 154C	2	78349, 78350	11/50
Missouri-Kansas-Texas	155A,C-157A,C	6	78726-78731	3-5/51
Missouri Pacific	8009-8012	4	78135-78138	4/50
	8013-8018	6	78734-78739	5-6/51
	8019-8022	5	79042-79045	5-6/52
	8023-8026	4	78208-78211	6/52
	8027-8030	4	78957-78960	7-8/52
	8031-8036	6	80045-80050	8-9/52
New York Central	4208-4211	4	78204-78207	6/50
New York Central	4213, 4214	2	79040, 79041	5/52
Southern Rwy	6900-6903	4	80846-80849	10-11/53
Southern Rwy	6904, 6905	2	81081, 81082	12/53
Southern Pacific	6019, 6020	2	77999, 78000	8/50
	6021, 6022	2	78001, 78002	9/50
	6023	1	78740	4/52
	6024-6027	4	79036-79039	4-5/52
	6028-6033	6	80434-80439	5-6/53
	6034	1	80443	9/53
	6035-6045	11	80835-80845	9-10/53
EXPORT BRAZIL
Paulista Railway	900-902	3	80440-80442	10/53
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PB-1 Production
Drawing and Data by: Jean-Denis Bachand
Atchison Topeka & Santa Fe	51A, 52A	2	75001, 75004	10, 12/46
	53A-56A	4	75337-75340	4-6/47
	57A, 58A	2	74704, 74705	7, 8/47
	59A-62A	4	76543-76546	10-12/48
	70A-73A	4	76091-76094	2-3/48
Denver & Rio Grande Western	6002, 6012	2	74702, 74703	2, 4/47
New York Central	4300, 4301	2	75605, 75606	1/48
New York Central	4302, 4303	2	75610, 75611	12/48
Pennsylvania	5750B, 5752B	2	75343, 75344	10/47
	5754B, 5756B	2	75345, 75346	11/47
	5758B	1	75347	12/47
Southern Pacific	6005B-6007B	3	75607-75609	5-6/48
Southern Pacific	6008B-6010B	3	75786-75788	8/49
Union Pacific	604B-606B	3	75612-75614	1/49
	607B	1	75785	1/49
	998B, 999B	2	75341, 75342	9/47
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PB-2 Production
Drawing and Data by: Jean-Denis Bachand
Alco ("More Power for America")	8375B	1	75789	3/50
Southern Pacific	5918, 5919	2	78219, 78220	8-9/50
	5920, 5921	2	78212, 78213	4/52
	5922-5924	3	80607-80609	5-6/53
Roster information: Extra 2200 South
The first PA-1 and PB-1 were released by ALCO for testing on the Lehigh Valley on June 26, 1946. Photos of the first PA-1 and PB-1 testing on the Lehigh Valley in Black Demo paint are in Richard Steinbrenner's ALCO A Centennial Remembrance pp255-258. Steinbrenner documents the ceremony for the "ALCO 6000" at Schenectady on September 18, 1946 and then more ceremonies at New York City September 22-24, 1946. The three new Santa Fe units of #51L, A, B were turned over to the New York Central for movement to Chicago on September 25, 1946. According to Early Diesel Daze by John McCall the Santa Fe did not receive these units until October 1946. McCall on p167 notes that #51 left Chicago for Los Angeles with #7 the Fast Mail and Express on October 4, 1946. (Footnote provided by Ed Cooper.)
PA roster corrections and additions by: Martin Baumann and R. Craig
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PA-4 Remanufacturing
Drawing and Data by: Jean-Denis Bachand
Delaware & Hudson	16	1	76535	10/48
	17	1	76537	11/48
	18	1	76541	12/48
	19	1	75318	5/47
Heritage #16 - Santa Fe 59L #17 - Santa Fe 60L #18 - Santa Fe 62L #19 - Santa Fe 66L, nee 54B

* * * Technical Data * * *

Alco PA / PB (DL304,B,C,D / DL305,B,C,D) Technical Data
Drawings and Data by: Jean-Denis Bachand
Engine	244 V-16 (4-cycle)	Alco PA-1: 2000 hp vvvv PA-2: 2250 hp	Bore & Stroke: 9.0" x 10.5"	RPM (Max. / Min.): 1000 / 400	Wgt: PA: 303,500 lbs. vvv PB: 300,700 lbs.
Powertrain	Main Gen.: GT566C1 vvvv PA-2: GT586	Traction Motors: vvvGE-746A2 (four)	Tractive Force (starting): 50,865 lbs @ 25%	Tractive Force (continuous): 30,500 lbs @ 20 mph	T/M Blowers: Stuart (Mech. - two)
Trucks	A1A-A1A (3 axles)	Wheel Dia: 42"	Speed: 100 mph / Gear Ratio: 62:21	Turning Radius (min): ? degrees	Wheelbase: 15'-4"
Operation	M/U Capability	Dyn. Braking	Auxillary Generator: GE DC56	Air Comp.: Westinghouse 3CD	Air Brake: West. 6L
Capacities	Fuel: 1000 gal.	Lub Oil: 192 gal.	Cooling Water: 250 gal.	Sand: 22 cubic feet	Steam Gen.: Vapor - 3000 psi
Dimensions	PA Length: 65'-8"vvvv PB Length: 63'-8"	Bolster: 34'-2""	Pilot-to-Pilot (distance) PA: 63'-3" vvvvvvvvvvvvvvvvvvvv PB: 60'-6"	Engine Hood Heighth *: 15'-2"	Cab Heighth*: 14'-0"
Dimensions	Cab Width: 10'-6.5"	--	Length over handrails: --	Distance between Truck Centers: 49'-8""
* Distance is from top of railhead. Reference Sources: A Centennial Remembrance: by Richard T. Steinbrenner Early Diesel Electric & Electric Locomotive by Rail Heritage Train Shed Cyclopedia #64
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PA-4 Rebuild (by Morrison-Knudsen) Technical Data
Drawing and Data by: Jean-Denis Bachand
Engine	251F V-12 (4-cycle)	2400 hp	Bore & Stroke: 9.0" x 10.5"	RPM (Max. / Min.): 1025 / 400	Wgt: PA: 317,900 lbs.
Powertrain	Main Gen.: GT566E5	Traction Motors: vvvGE-752E6 (four)	Tractive Force (starting): 79,475 lbs @ 25%	Tractive Force (continuous): 33,600 lbs @ 19 mph	T/M Blowers: Stuart (Mech. - two)
Trucks	A1A-A1A (3 axles)	Wheel Dia: 42"	Speed: 100 mph / Gear Ratio: 62:21	Turning Radius (min): ? degrees	Wheelbase: 15'-6"
Operation	M/U Capability	Dyn. Braking	Auxillary Generator: GE GY27A3	Air Comp.: Westinghouse 3CDB	Air Brake: West. 6L
Capacities	Fuel: 1260 gal.	Lub Oil: 250 gal.	Cooling Water: 280 gal.	Sand: 22 cubic feet	Steam Gen.: Vapor - 4625
Dimensions	PA Length: 65'-8"vvvv PB Length: 63'-8"	Bolster: 34'-2""	Pilot-to-Pilot (distance) PA: 63'-3" vvvvvvvvvvvvvvvvvvvv PB: 60'-6"	Engine Hood Heighth *: 14'-8"	Cab Heighth*: 14'-11"
Dimensions	Cab Width: 10'-6.5"	--	Length over handrails: --	Distance between Truck Centers: 49'-8""
* Distance is from top of railhead. Reference Sources: PA-4 Locomotive: by N.E. Anderson & C.G. MacDermot			Notes: Locomotives were remanufactured by Morrison-Knudsen at the Boise, Idaho shops.

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