Electrical And Mechanical Disconnection Of 3-Phase Locomotives Types Wap-7 & Wag-9; Dismantling Of Motorized Axle From Bogie And Disassembly Of Tm And Gear Case And Cleaning Of Gear Case, Removal And Fitment Of Elastic Ring Of Wap- 7/Wag-9 Locomotive During Major/Minor Schedule, Removal And Fitment Of Spheri Blocs Of Axle Guide And Torque Arm Of Wap-7/Wag-9 Locomotives And Disassembly Of Wap-7/Wag-9 Locomotives Motorized Bogies During Toh/Ioh/Moh Schedule