MID/AN/38

Repairs to 3 cusec discharge HC pump unit 02 at LIS Kotgarhi L/L. The job involves decoupling of pump of unit no. 02 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. Providing and fitting of 2 nos. bearings (2 nos.) at driving and non-driving end as per sample. Providing and fitting of new bushes-2 nos. and applying enough grease to avoid excessive wear and tear. Fabrication of glands and studs with nuts. 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. 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.

Repairs to 100 HP oil immersed starter unit 03 installed at LIS Kotgarhi H/L. The job involves disconnecting the starter and shifting to workshop by mechanical transport. Thereafter dismantling of starter at workshop and replacement of worn-out G.M nuts and washers, copper fingers, contacts, (moving and fixed) as per sample. Shifting the starter to LIS. Replacement of worn out/burnt copper thimbles of cables by p/f of new thimbles duly crimped and taped. Topping of 12 litrs. T.oil Connecting power supply & testing on load. Complete job includes the cost of material, labour charges and other misc. charges at site.

Repair to the leaking portion of 300 mm dia delivery pipe at LIS Kotgarhi H/L. The Job involves dismantling of the delivery pipe by using manual labour and cutting the rusted nuts and bolts by gas cutter, suitable tools and tackles. There after repairs to delivery pipe by way of welding of leaking section in double layers from all around and providing / welding of M.S plate collar (suitable thickness) as overlap joint for strengthening. Welding with one root layer and two additional layers with 3.14 mm and 4mm I.S marked M.S welding electrodes to fill the grooves between the pipe, welding to be done by specialized skilled workman, handling with proper tools, tackles, employing semi-skilled workman and suitable tools /tackles. The weld should be spurt and gap free and to be done with good quality electrodes and slag material to be chipped off. Complete job includes cost of material, hire charges of welding set and diesel generator set, labour charges, manual handling, transportation charges and hiring charges of tools and tackles. Complete Job

Repairs to 7 cusec discharge HC pumping unit no. 2 at LIS Aryanpura. The job involves decoupling of pump of unit no. 2 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. Providing and fitting of 2 nos. bearings at driving and non-driving end as per sample. Providing and fitting of new bushes-2 Nos., neck rings (2 nos.) as per sample and applying sufficient amount of grease to avoid excessive wear and tear. Fabrication of glands and studs with nuts. 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. 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.

Repair to 100 HP 3 phase induction motor of pumping unit no.02 installed at LIS Aryanpura. The job involves dismantling the motor by unfastening the foundation nuts and bolts and decoupling from the pump and disconnecting the electrical connections from the main supply. Shifting of the motor to workshop by mechanical transport. Then complete dismantling of the motor involves extraction of rotor from stator followed by cleaning of stator and rotor using compressed air, organic solvent, CCL4 etc. to remove the dust particles /silt etc. Extraction of burnt winding from the stator, cleaning of stator with petrol. P/F of new winding wire of suitable gauge & size in the stator, varnishing the stator winding with superior quality of varnish. Drying the stator winding with hot air circulation process. Assembling of the motor. Shifting the motor back to LIS. Refitting the motor at its installed position and coupling with pump, making of electrical connections, alignment with pump, testing of motor on full load. Complete job includes the cost of material, labour charges, hiring charges of tools & tackles, transportation charges.