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The EMD GT46MAC was the first freight dedicated locomotive with AC electric transmission made by General Motors and was classed the 4th generation freight dedicated diesel locomotive of Indian Railways. In the beginning, WDG 4 series EMD locomotives were 4000 HP but after refinement in the newer editions called WDG '4B' series was made stronger to 4500 HP with a capability of operating at maximum speed limit of 105kmph.
WDG FORTH GENERATION MAINLINE DIESEL LOCOMOTIVES
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B ABR 70138
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B ABR 70189
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B BNDM 12959
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B BNDM 70034
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B GOC 12610
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B GOC 12827
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B GY 12570
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B GY 12999
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B KJM 12426
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B KJM 12637
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B KYN 70181
MAINLINE DIESEL LOCOMOTIVE NO. WDG 4B LDH 12838