Repair to 25 HP submersible motor and other allied works

Amount

Repairs to 25 HP submersible motor by way of decoupling of damaged 25 HP 3-phase 2900rpm submersible motor from the pump motor assembly at site. Shifting the decoupled motor from site to the workshop in a private load carrier arranged by the firm. At workshop the motor dismantled by way of opening all nuts, bolts, cover plates etc. and the damaged/burnt out windings extracted from all stator slots by special tools & tackles, skilled manpower. After extraction of the windings from the stator the same shall be rewound by using PVC insulated Cu-wire of proper gauge and specification and inserted back in the stator slots of the motor as per actual pitch and turns. The job includes insulation of the windings by proper insulating material, tape etc. and assembling back of rotor, stator, cover plates, all nuts and bolts of the motor. The repaired motor shall then be shifted back to site from workshop in a private load carrier arranged by the firm and at site the motor shall be recoupled with the pump. All power connections shall be reconnected with the motor and pump motor assembly lowered back into the bore well by refitting each of the column pipes one by one, tightening all the nuts and bolts & inserting the new flange washers in between the flanges where ever required. After complete lowering the unit shall be tested on full load. The old copper shall be retained by the firm & shall quote the rates with rebate on account of old copper scrap.

Providing, inserting & fixing/tightening of new bronze bushes in the lower and upper manifolds of the above repaired motor in place of damaged bushes by way of first extracting the old damaged bushes from the manifolds by means of tools and tackles, skilled technical manpower, making the inner surfaces of the manifolds smooth having high precision and accuracy by machining on lathe. The bush having ID =36mm, OD=46mm and length=40 mm. The job shall include casting, fabrication, machining & finishing of the new bronze bushes (04 in No.), before being fixed into the manifolds. The old damaged scrap of bushes shall be retained by the firm & shall quote the rates with rebate on account of old scrap.

Fabrication and providing at site GI reducer nipple out of 65mm dia GI pipe of 400mm in length with one end threaded and the other end fitted with 65mm dia flange of thickness 12mm over lapped by 100mm dia flange having thickness 12mm with the help of welding. The nipple shall be used to connect the submersible pumping unit with the 100mm dia column pipe. The job also includes providing of 100mm dia flange washers-06 No’s and 3” ,5/8’ nuts and bolts -03 Kgs.

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