Periodic maintenance of 900 VM-2 ,60 Cusecs, discharge, 32.30 mtr Head VT pump of pumping Unit No 05 Installed at Tawi Pump House Jammu.

Amount

Transportation charges for shifting of worn-out components of the VT pump of 900 VM-2 ,60 Cusecs, discharge,32.30 mtr Head VT pump of pumping Unit No 05 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. 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 2nd 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 shaft and 2nd line shafts of VT pump by way of rebuilding of worn-out seat portion of bearing of the Shafts. Rebuilding top shaft by way of extracting worn out sleeve of the shaft and turning shaft to remove unevenness in surface and providing and fitting new shaft sleeve fabricated out of Gun metal /SS material and fitting and locking sleeve at seat portion of bearing. 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 within the prescribed limit of +0.03 mm. Rebuilding of 3rd line shaft of pump at seat portion of bearings by way of welding with SS welding electrodes conforming AISI-410 grade, 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 within the prescribed limit of +0.03 mm. 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 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 suitable S.S. electrodes and turning, finishing, polishing of the welded portion to the required size. The job further involves back carriage of the repaired column assembly and bowl assembly parts i.e. shaft enclosing tubes, SS line shaft and Muff coupling 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 manual labour .The job involves replacement of thrust pad of other 02 No.s guide spider- (06 Nos). Assembling and lowering of extracted VT pump and column assembly involves complete wiping ,cleaning repaired parts, lowering of complete bowl assembly , column assembly in proper sequence by fitting of column pipes and fitting further, lowering fitting of shaft enclosing tube along with line shaft 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 the Deptt.) bottom rubber bearing 1No., HT column bolts with nuts 120 x20 mm (reputed make) 12 Nos., HT shaft enclosing tube bolts with nut 110x16 mm 12 Nos. HT bolts with nuts 110x25 mm (reputed make) 12 Nos., HT bolts 65x16mm 15 Nos. , HT bolts 45x16 mm 06 Nos., HT Allen key bolts 40x12 mm 10 Nos., spring washers-16mm 24 nos., spring washers 12mm 24 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” 2kg, hacksaw blade double edge 6 Nos., HT bitumen tape roll, emery cloth 7 mtr. Grease -10 kg and servo system 46-15 litre for topping of motor (Grease and servo system46, provided by 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 & MECHANICAL WORKS

BEE AAR ENTERPRISES