The Contractor Has To Provide Services Required For “Reconditioning, Overhauling And Commissioning Work Of Loco No-3. The Following Works Has To Be Carried Out On 700 Hp Diesel Twin Power Pack, Bo-Bo With Cummins Nta 855L Engine Bhel Make Loco.1.Total Dismantling Of Both Side Engine Hoods.2.Decoupling Generator From Engine.3.Removing The Engine And Generator.4.Overhauling Of Traction Generators Involving Cleaning Commutator Veer Ring For Any Copper Beads, Examination Of The Brush Gear And Cleaning Insulation Of Brush Arms, Checking Brush Ring Alignment, Checking Carbon Brush For Wear And Tear, Inspection Of Carbon Brush Holder, Examination Of Belt Drive For Proper Tension, Cleaning Grease Escape Drains, Dismantling, Cleaning , Visual Inspection Of Bearing And Lubrication, Visual Observation To Check Decolourization Of Winding If Any Varnishing The Same , Terminal Box Connection Checking, Cooling System Inspection , Electrical Testing On Motor ( Insulation Resistance, Winding Resistance Etc), Refitting And Alignment Of The Generator. Running The Machine On No Load And Checking Bearings Vibration And Rough Commutator.5.Lifting The Upper Frame, Removing Under Truck Bogies , Removing Four No’S Of Traction Motors.6.Overhauling Of Traction Motor Involving Cleaning The Commutator Veer Ring For Any Copper Bead, Examination Of The Brush Gear And Cleaning Insulation Of Brush Arms, Checking Brush Ring Alignment, Checking Carbon Brush For Wear And Tear, Inspection Of Carbon Brush Holder, Dismantling Of Motors, Cleaning Armature, Baking Armature To Remove The Moisture If Required , Visual Inspection Of Bearing And Lubrication , Checking Of All Brush Gear Bolts, Checking Tightness Of Bolts Securing Axle Caps And Gear Case , Checking Of Air Inlet Bellows, Checking The Leakage From The Gear Case And Suspension Bearings, Checking Suspension Of Suspension Bearing. If Required Replacement With New Bearing. Checking Wear Of Tooth Pinion And Gear Wheel, Visual Observation Of Winding, Reconditioning The Winding With Insulating Varnish, Checking All The Components For Distortion, Wear And Tear, Checking Terminal Box Connection, Electrical Testing On Motor (Insulation Resistance, Winding Resistance Etc.), Refitting And Alignment Of Motor.7.Fixing Of Four No’S Traction Motor Junction Boxes, Motor Power Cable Termination And Dressing.8.Refitting The Under Truck Bogies, Engine And Generator , Alignment Of Generator And Engine9.Coupling The Engine And Generator, Cable Termination In Generator, Connecting All The Solenoids In Engine Side10.Overhauling And Refitting Of All Relays , Power Contactors And Auxillary Contactors It Includes Cleaning , Checking Auxillary Contacts, Coil Condition, Refitting The Contactors And Relays, If Wear And Tear Appears Replacing It With New Spares11.Rewiring Of Control Circuits Involves Wiring Of Protective Devices Such As Wheel Slip Relay(Wsr), Overload Relay(Olr), Ground Relay(Gr) , High Temperature Protection, Low Oil Level Protection, Battery Charging Indication, Low Air Protection As Per Bhel Drawing (Drawing Enclosed) With Ferules .12.Rewiring Of Lighting And Fan Circuits As Per Bhel Drawing (Drawing Enclosed) With Ferules.13.Rewiring Of Power Circuits Involving Battery Circuit, Cranking Circuit, Propulsion Circuit And Notching As Per Bhel Drawing (Drawing Enclosed) With Ferules.14.Coupling The Engine And Generator And Refitting Them In Loco.15.Fixing The Engine Hoods.16.Testing And Functional Check Of The Electrical Related System.17.Commissioning And Checking The Operations Of Loco.
