NIT NO. 19, ITEM NO.03 (2023-24)

Closing of suction and delivery valve of pump set by manual labour.

Renovation of electric connection from the motor & removing of motor flange connection from the pump body and taking out the complete impeller and along with motor with the help of H.O.T. crane and put inside at pump house in safer side.

Impeller Nut (as per sample).

Dynamically balancing of impeller.

S.S. Sleeve fitted on impeller neck ring (as per sample).

Repairing of Gland housing by machining on heavy duty machine and fixing of new C.I. Bush on gland housing. (as per sample).

Making and fixing of bronze cooling ring for gland) arrangements (as per sample).

Replacement of GM distance ring between bearing & impeller.

Fixing of taper ring on the distance rings for stopping of water from impeller side to bearing side.

Removing of rotor by dismantling of side cover of motor by opening/cutting of nut-bolts etc. with proper safety of winding of rotor and stator.

Repairing of motor side cover by machining of bearing housing seal to enlarge the bore for fixing of new bearing no. NU 328 on heavy duty boring machine with proper alignment etc. as required.

Fabrication of new bearing housing as per Bearing No. NU 328 & motor covered as required.

Cleaning of stator winding with petrol, insulating the jumper, tightening the stator slot wedges with Dr. beck epoxy jet coat. Varnishing of stator winding with Dr. beck varnish and balancing the same.

Cleaning of rotor winding with high pressure dry air (nitrogen) and high pressure air and final cleaning to remove the dirt / dust and petrol out of rotor winding in temperature controlled oven of IR/PI value. Varnishing of rotor winding with First class epoxy varnish, backing the same as required by job.

Repairing of Rotor shaft as per ID of bearings on DE and NDE side with suitable L&T Make CGS Welding electrodes, machining and grinding as per ID complete as required by job.

Replacement of Bearings of both sides i) Bearing No. NU 328. Make-SKF

ii) Bearing No. 6322 Make-SKF

Replacement of Bearing Cover made from CI with casting, machining, drilling, oil seal arrangements & drilling, making for greasing arrangement for lubrication of bearing.

Assembling of complete assembly on motor shaft with impeller new key and impeller nut.

Removing of broken studs bolt in base frame by drilling, welding & heating with gas cutter & taken out 4 Nos, bolts from the foundation base frame.

Foundation bolts (as per sample).

Fixing of C.I. body in M.S. base frame by new nut bolts with H.O.T. crane and heavy labour with complete delivery side & suction side with new rubber packing, new nut bolts & fixing of rotator assembly in body with motor flange bolt & foundation bolts etc. & making proper alignment etc.

Loading/Unloading and transportation of complete motor from site to workshop and back to site including hiring of cranes at site and workshop including heavy labour arrangement etc. as per site requirement.

Making of electric connection with cables and stator and taking trial run on no load & on load

M.B. Enterprises