EMD SD40

The EMD SD40 is a model of 6-axle diesel-electric locomotive built by General Motors Electro-Motive Division between January 1966 and August 1972. 1,268 locomotives were built between 1966 and 1972. In 1972, an improved version with new electronics was developed and marketed as a new locomotive, the SD40-2.

Design

Like its predecessor in EMD's catalog, the SD35, the SD40 is a high-horsepower, six-axle freight locomotive. The SD40 is a member of EMD's long-running Special Duty class of locomotives, which all are built with 6 axles.
In 1966, EMD updated its locomotive catalog with entirely new models, all powered by the new 645 diesel engine. These included six-axle models SD38, SD40, SDP40 and SD45. All shared standardized components, including the frame, cab, generator, trucks, traction motors, and air brakes. The primary difference was the power output: SD38 = from a non-turbocharged V16, SD40 = from a turbocharged V16, and SD45 = from a turbocharged V20.

Original owners

856 examples of this locomotive model were built for American railroads, 330 were built for Canadian railroads, 72 were built for Mexican railroads, 6 were built for the Guinea-Boke Project, and 4 SD40Ms riding on gauge trucks were exported to Brazil. They were manufactured at McCook, Illinois.

Built	Serial	Phase	Railroad	Road numbers	Quantity	Notes
6/66	31766	Ia2	ASAB	506	1	No d/b
3/66-5/66	32036-32055		ATSF	1700–1719	20	1708/5008 preserved
10/71-11/71	5801-1 - 5801-25	IIc	BN	6300-6324	25
5/67	33161-33173	Ic	B&O	7482-7494	13	Drop grabs on nose, 7482–7490 to CNJ
4/69	34775-34778	IIb_	B&O	7497-7500	4
8/66-9/66	32092-32100	Ia2	CGW	401-409	9
1/66-2/66	31263-31282	Ia1	CNW	867-886	20	No d/b, 867 first SD40 built
4/66	31760-31765	Ia2	CNW	887-892	6	No d/b
9/66	32314	Ia2	CNW	893	1	No d/b
2/67	32686-32688	Ib2	CNW	894-896	3	No d/b
7/66-8/66	31929-31948	Ia2	C&O	7450-7469	20
5/67	33154-33160	Ic	C&O	7475-7481	7	Drop grabs on nose
4/69	34779-34784	IIb_	C&O	7501-7506	6
6/70	36696-36705	IIb2	C&O	7507-7516	10
7/70	36746-36755	IIb2	C&O	7517-7526	10
3/71	37204-37213	IIc	C&O	7527-7536	10
10/67	33516-33519	IIa2	C&S	875-878	4	To Burlington Northern Same numbers.
4/68	33918-33926	IIb1	C&S	879-887	9	To Burlington Northern Same numbers. 879 to BNSF.
9/66	32141-32148	Ia2	CRR	3000-3007	8
9/68	34177	IIb_	CRR	3008	1
9/68	34742-34747	IIb_	CRR	3009-3014	6
6/71	37417-37422	IIc	CRR	3015-3020	6
6/71	37538-37541	IIc	CRR	3021-3024	4
4/70	36124-36129	IIb2	DE	001-006	6	Numbers out of sequence
7/72	5817-1 - 5817-2	III	DE	013-014	2
7/72	5818-1 - 5818-3	III	DE	015-017	3
6/66	31799	Ia2	GM	10	1	No d/b
2/66	31007-31018	Ia1	GM&O	901-912	12
9/66	32161-32169	Ia2	GM&O	913-921	9
8/69	35184-35195	IIb_	GTW	5900-5911	12	No d/b
1/70	35831-35839	IIb2	GTW	5912-5920	9
9/70	36887-36895	IIb2	GTW	5921-5929	9	No d/b
12/67	33244-33249	IIa2	IC	6000-6005	6	No d/b
8/69	34939-34951	IIb_	IC	6006-6018	13	SD40A: frame, fuel tank
1/70	35685-35689	IIb2	IC	6019-6023	5	SD40A: frame, fuel tank
10/66-11/66	32101-32114	Ib1	KCS	600-613	14	Some equipped with Locotrol
8/68	33958-33965	IIb_	KCS	614-621	8	Some equipped with Locotrol
6/70	35493-35498	IIb2	KCS	622-627	6	Some equipped with Locotrol, numbers out of sequence
3/71	35840-35847	IIc	KCS	628-635	8	Some equipped with Locotrol
3/71	38363	IIc	KCS	636	1
6/66-9/66	32088-32091	Ia2	L&N	1225–1228	4
4/69	34758-34762	IIb_	L&N	1229–1233	5
4/70	35948-35952	IIb2	L&N	1234–1238	5
8/70-9/70	36809-36818	IIb2	L&N	1239–1248	10
5/71	38203-38212	IIc	L&N	1249–1258	10
1/68-2/68	33771-33784	IIb1	MP	720-733	14	No d/b
2/69	34504-34523	IIb_	MP	734-753	20	No d/b
1/70	35725-35740	IIb2	MP	754-769	16	No d/b
3/71-4/71	37543-37562	IIc	MP	770-789	20	No d/b
3/67-4/67	32968-32987	Ib2	MP	700-719	20	No d/b
5/66-6/66	31899-31928	Ia2	NW	1580–1609	30	High short hood
5/71	35605-35619	IIc	NW	1610–1624	15	High short hood
12/70-1/71	36896-36926	IIb2	PC	6240-6270	31
1/71-2/71	36997-37010	IIb2	PC	6271-6284	14	To Conrail same numbers; Various units wrecked and retired
2/66-3/66	31285-31349	Ia12,Ia2	PRR	6040-6104	65	To Penn Central same numbers.
4/69-5/69	34889-34898	IIb_	SOO	736-745	10	No d/b
3/70	36099-36102	IIb2	SOO	746-749	4	No d/b
5/71	37425-37431	IIc	SOO	750-756	7	No d/b
4/71	37355-37370	IIc	SOU	3170-3185	16	High short hood; To Norfolk Southern same numbers
12/71-1/72	7375-1 - 7375-15	III	SOU	3186-3200	15	High short hood: To Norfolk Southern same numbers
1/66-5/66	31491-31569	Ia1,Ia2	SP	8400-8478	79	Numbers out of sequence
4/68-6/68	33671-33680	IIb_	SP	8479-8488	10
10/66-12/66	32400-32434	Ib1	UP	3048-3082	35
4/66	31414-31438	Ia2	UP	3000-3024	25
4/66	31575-31589	Ia2	UP	3025-3039	15
8/71-9/71	37639-37653	IIc	UP	3083-3097	15
9/71-10/71	37904-37928	IIc	UP	3098-3122	25
8/66	32134-32138	Ia2	WM	7470-7474	5
11/68	34104-34105	IIb_	WM	7495-7496	2
7/69	34967-34971	IIb_	WM	7445-7449	5

Built by GMD at London, Ontario

Built	Serial	Phase	Railroad	Road numbers	Quantity	Notes
10/71	A2561-A2563		AC	180-182	3
9/67	A2246-A2253		CN	5000-5007	8
10/67-12/68	A2260-A2327		CN	5008-5075	68	No d/b. 5062 destroyed in the 1986 Hinton train collision.
2/69-11/69	A2335-A2369		CN	5076-5110	35	No d/b. 5104 destroyed in the 1986 Hinton train collision.
11/69-12/69	A2370-A2391		CN	5111-5132	22
12/69-4/71	A2392-A2434		CN	5133-5175	43	No d/b
4/71-11/71	A2493-A2542		CN	5176-5225	50	No d/b
11/71-12/71	A2588-A2602		CN	5226-5240	15	No d/b
7/66	A2133-A2164	Ia2	CP	5500-5531	32	Nose brakewheel
12/66	A2177-A2209		CP	5532-5564	33
7/68	A2328-A2333		QNSL	200-205	6
6/71	A2543-A2557		QNSL	206-220	15

Export SD40's Built by EMD at McCook, Illinois or GMD at London, Ontario

Built	Serial	Phase	Railroad	Road numbers	Quantity	Notes
4/67	32228-32231		RFFSA	3701-3704	4	Brazil, Broad gauge, model SD40M on a shortened 60 ft 10 in frame
5/68	33385-33403		NdeM	8503-8521	19
3/68	33895-33897		NdeM	8500-8502	3
12/71	38893-38932	III	NdeM	8536-8575	40
8/72	37894-37899		BOKE	101-106	6	Companie de Bauxite du Guinea
1/72	A2603-A2612		NdeM	8576-8585	10	Low-nose headlight, bell between number boards

Phases are as listed by Robert Sarberenyi.