Six units – built by GE. B-B trucks.
Nos. 1,2,6 – 380 hp.
Nos. 3-5 – 400 hp.
Tractive effort: Nos. 1-2: 1,300 lbs.
Nos. 3-6: 1,700 lbs.
Weight – Nos. 1-2: 91,000 lbs.
Nos. 3-5: 88,000 lbs.
Nos. 6: 92,000 lbs.
| Road no. | Class | Built date | Builder’s no. | Original road no. | Renumbered | Second road no. | Renumbered | Notes / disposition |
| 1 | ER-4a | May 47 | 28349 | 7751 | Was to be renumbered to No. 1501 but renumbering was not done. To Greater Winnipeg Water District No. 103 Dec 66, to Ontario Southland, to Port Stanley Terminal Railway No. L-3 1994. | |||
| 2 | ER-4a | May 47 | 28350 | 7752 | 1501 | To Bowater-Mersey Paper (Liverpool, NS) No. M-563, to Musquodoboit Harbour Railway Museum 1991 | ||
| 3 | ER-4b | Sep 56 | 32654 | Planned to be No. 1503 but delivered as No. 3 To International Minerals & Chemicals (Yarbo, SK) No. 2 May 62 | ||||
| 4 | ER-4b | Sep 56 | 32655 | Planned to be No. 1504 but delivered as No. 4 To STELCO (Edmonton, AB) No. 4 May 67 | ||||
| 5 | ER-4b | Sept 56 | 32656 | Planned to be No. 1505 but delivered as No. 5 To STELCO (Welland, ON) No. 5 Jun 30 69, to Port Stanley Terminal Railway 1994 | ||||
| 6 | ER-4c | Sep 42 | 15124 | M&St.L No. 11 | Originally Minneapolis & St. Louis No. D-842, re # No. 11. To CN Feb 57, rebuilt with MU by GE. To Indusmin Ltd. (Pine Grove, ON) Apr 70, to Andrew Merrillees (D) AMLX No. 6 |