MID/AN/23

Carriage of the dismantled 06 cusec 56 m head HC pump set, to the nearest roadside using manual labour, head load to nearest road side, loading in transport vehicle, carriage to the workshop in the Mechanical Transport for repairs, re-assembling at workshop and then back carriage to the LIS after carrying out necessary repairs. Fitting/ reinstallation at the base frame and testing on part/full load at site.

Repair/Restoration of 6cusec discharge 56 m head HC pump of pumping Unit No. 3 installed at LIS Ambaran. The Job involves removing the top cover, extraction of shaft and impeller assembly together with bearing brackets. Shifting the impeller shaft assembly together with bearing brackets to workshop by using mechanical transport. Complete dismantling of impeller shaft assembly. Repair/rebuilding of impeller by way of brazing, turning and finishing to accurate size including making of new key way of the same size and specifications. Repairs/rebuilding of pump shaft at damaged spots by applying new material so the shaft should be balanced then finishing it to true size. Providing/ fitting of new set of bearings (6310 and NU 310) and bushes (2 nos.) As per sample. Fabrication of neck rings as per sample. Re-assembling of impeller shaft assembly and shifting back to site. Providing/fabrication of new set of coupling as per sample. 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 4 cusec discharge 60m Head H.C pump no. 02 installed at LIS Seripalai. The job involves de-coupling of pump from the motor and removing the top cover extraction of shaft and impeller assembly together with bearing bracket and shifting to workshop by using manual labour and mechanical transport. Complete dismantling of impeller assembly. Repair to key ways. Rebuilding of impeller by using good quality electrodes. Repairs to pump shaft at damaged spots by using good quality electrodes. Turning/machining of impeller and pump shaft for proper size. Providing/fabrication of one no. Sleeve as per sample. Making necessary repairs to bearing housing. Providing/ fitting of DE and NDE bearings (6310- 2nos.) & bushes (2nos) in lieu of worn out ones. 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 new nuts and bolts and studs coupling with motor. P/F of gland packing etc. and testing on load. The Job includes cost of material; labour (skilled and unskilled) loading charges hire charge of tool and tackles To and transportation charges. Complete job

Repairs to 200 mm foot valve assembly of pumping unit no. 2 installed at LIS Seripalai. The job involves disconnecting / dismantling of the foot valve assembly from the suction pipe by deploying manual labour and allied tools & tackles. Shifting / transporting to the workshop. Cleaning by washing with water to make the foot valves completely silt free. After drying them completely. Dismantling of damaged foot valve mechanism. Fabrication of new flap plate as per the sample Providing / fitting of new leather washer cut as per size of the flap plate. Reassembling the foot valve and transporting back to the installation site at LIS. Fitting the valves to the respective suction line with replacement of damaged rubber gaskets of flanged joints and worn-out nuts, bolts etc. Complete job including cost of material, labour charges, transportation charges and hire charges for tools & tackles.

R K Electrical and Engineering Works

Chargotra Trading Co.