Periodic maintenance of 900 VM-2 ,60 Cusecs, discharge,32.30 mtr. Head VT pump of pumping Unit No 1 Installed at Tawi Pump House Jammu

Amount

Transportation charges for shifting of worn out components of the VT pump of pumping unit no.1 for repairs to the workshop by way of loading in mechanical transport from Tawi pump house and unloading the same at the workshop with the help of E.O.T crane and manual labour. Complete dismantling of bowl assembly of VT pump, servicing, greasing and re-assembling the bowl assembly including replacement of HT bolts/studs along with minor repairs to bowl assembly by way of welding worn out portion with welding electrodes. grinding and finishing to required size Repairs to one number guide spider by way of welding of damaged/worn out seat portion of guide spider with suitable C.I. electrodes and finishing the welded portion as required making the surface even. Extraction of broken/damaged bolts by drilling and rethreading the drilled holes for fitment of counter sunk bolts. P/F of rubber pads with counter sunk bolts in all the three arms of guide spiders. Repairs to 4rth shaft enclosing tubes of VT pump by way of checking of face to face alignment and eccentricity developed in the enclosing tube at different off-sets with the help of dial gauge on lathe machine. Removing of eccentricity developed after welding /patching at the cracked portion with suitable M.S. welding electrodes and also welding of the cracked stiffeners of the flanges of the enclosing tubes. Repairs to top lineShaft of VT pump by way fabrication and fitting of new shaft sleeve of suitable material SS,AISI 410/Gun metal in place of worn out shaft sleeve after extraction of old damaged shaft sleeve from the top shaft. Turning ,finishing, polishing to required size. Checking of eccentricity developed at the different off-sets of the shaft during operation and removing the eccentricity developed by means of press bench. The tolerance limit be kept with in the prescribed limit of +0.03 mm and 4rth line shafts of VT pump by way of rebuilding worn out seat portion of the bearing on the line shaft with suitable S.S. electrodes conforming to AISI-410 grade. Turning ,finishing , polishing of the rebuilt portion to required size. Rebuilding damaged threads of top shaft. Checking of eccentricity developed at the different off-sets of the shaft during operation and removing the eccentricity developed by means of press bench. The tolerance limit be kept within the prescribed limit of +0.03 mm then repairs to shaft holes /pin holes/key ways including fabrication and fitting of SS pins and SS keys as per sample. . Repairs to 01 Nos. Muff coupling by extraction of broken/damaged bolts from both the halves of the S.S. coupling by drilling and rethreading the drilled holes for 16 mm dia. Allen bolts. Repairs/rebuilding damaged /worn out portion of the muff coupling by way of welding with the suitablesS.S.electrodes and turning, finishing, polishing of the welded portion to the required size . The job also include repair to 01 No. line shaft bearing holder by way of rebuilding of the worn out/damaged inner portion of bearing holder using suitable machinable C.I electrodes. Turning, finishing and polishing the welded portion to the required size of the outer dia. of the line shaft rubber bearing .The job further involves back carriage of the repaired column assembly and bowl assembly parts i.e. guide spiders, shaft enclosing tubes, and SS line shaft, etc. to the site of Tawi pump house by way of loading in mechanical transport at workshop and unloading at site of Tawi pump house , Jammu with the help of E.O.T. crane and manual labour .Assembling and lowering of extracted VT pump and column assembly it involves complete wiping and cleaning of repaired parts, lowering of complete bowl assembly , column assembly in proper sequence by fitting of column pipes and further lowering fitting of line shaft along with shaft enclosing tubes one by one to discharge head and Tee joint fitting with rising main of 36” dia. P/F of consumables items during lowering of the VT pump like line shaft rubber bearing 7 Nos ( provided by Deptt) bottom rubber bearing-. 1No.,thrust pads-06 nos, HT column bolts with nuts 120 x20 mm (reputed make) 16 Nos., HT shaft enclosing tube bolts with nut 110x16 mm 18 nos. HT bolts with nuts 110x25 mm(reputed make) 06 Nos., HT bolts 95x20 mm 10 Nos., HT bolts 65x16mm 6 Nos., HT Allen key bolts 45x16 mm 06 Nos., HT Allen key bolts 40x12 mm 06 Nos., HT Allen key bolts 40x5mm 12 Nos., spring washers 16mm & 12mm 48 Nos., fire fly sheet 1/32” 6 kg, fire fly sheet 1/16” 7.5 kg., rubber insertion sheet 1/18” 12 kg, gland packing ¾” 2 kg, hacksaw blade double edge 5 Nos., HT bitumen tape roll, emery cloth 7 Nos., grease – 10Kg and Servo system46-12 litre( grease and servo system 46 provided by the deptt,) fitting of pump and motor half coupling, checking alignment of pump and motor using dial gauge , making all the electrical connection , tightening bolts , providing of gasket, electrical thimbles and then testing on full load . skilled person shall be provided by the firm for extraction /fitting /assembling of parts during lowering of VT pump. Complete job includes cost of materials and labour charges.

M/S TRIKUTA ELECTRICAL AND MECHNICAL WORKS

M/S K S ENGG WORKS