MID/AN/67

Repairs to 6 cusec discharge HC pump unit 01 at LIS Nazla chak . The job involves decoupling of pump of unit no. from the motor and removing the top cover, extraction of shaft and impeller assembly together with bearing bracket by using suitable tools & tackles and skilled technicians. Carriage of the impeller shaft assembly by using manual labour, loading in transport vehicle, carriage to the workshop in the mechanical transport for repairs. Repair to impeller shaft assembly at workshop by way of dismantling and extraction of damaged parts. Job includes repairs to pump shaft and impeller at damaged spots by way of re metaling then finishing to proper size so the shaft and impeller should be balanced. Repair to bearing brackets. Re-assembling of impeller shaft assembly and shifting back to site and there after lowering at proper position, placement of oil seal and closing the top cover along with P/F of new nuts ,bolts and studs. Providing and fitting of new bushes-2 Nos., and applying sufficient amount of grease to avoid excessive wear and tear. Fabrication of glands and studs with nuts.. Coupling the pump with the motor . P/F of gland packing .Priming the pump .Testing the pump on full load . The Job includes cost of material, labour (skilled and unskilled), loading charges, hire charge of tool and tackles, to and fro carriage charges. Complete Job Repair to 135 HP three phase induction motor at LIS Nazlachak.. The job involves decoupling the motor from the HC pump and unfastening the foundation nuts and bolts by using suitable tools and tackles and labour . Lifting the motor out of pump house to the roadside by using manual labour. Loading the motor in the vehicle and shifting the motor to the workshop . Unloading of the motor in the workshop .The job further involves dismantling of end covers, extraction of rotor from motor. Extraction of damaged winding from the stator. Cleaning of stator with compressed air and requisite chemical cleanser/CCL4. Complete rewinding by way of providing and fitting of new good quality winding wire of gauge and size (as per old sample) in the stator together with replacement of damaged /worn out wedges/strips and p/f of f-class insulation, Application of superior quality varnish (Red Becktol etc.) by spray impregnation process and drying the stator winding with hot air circulation process and thereafter checking the IR value. Re-assembling the motor after greasing. Shifting the motor to LIS . Installation of the motor over the base frame by providing / fitting of nut bolts, washers etc., making of electrical connections, replacing worn out nuts, bolts for the electrical connection. Alignment & coupling with pump .Complete testing of the pumping unit. Job includes cost of all material, transportation charges, head load and labour charges for skilled / semi skilled labour, hire charges for tools & tackles at the LIS. Complete Job

N B Engineering and Electric Works

JAI MAA BHAGWATI ELECTRICAL AND MECHANICAL WORKS