NIT No-26 EE (SDW) II/ (22-23) Item No. 08

Dismantling of Motor and complete Gear Box unit from its installed position after removing the coupling with the help of lowering/ lifting, tools & tackles and gas cutter for cutting the rusted and corroded nut bolt etc. Removing the propeller, propeller shaft and base frame with the help of required tools & tackles and men power after making suitable plate-form in 20’ deep aeration tank taking all safety majors as per requirement at site.

Switch off the power supply of motor from the main control panel one by one as per instructions of engineer-in-charge. Dismantling the damaged/ rusted motor covers, damaged plastic fans and removing the damaged nut bolts help up in motor by spanner, wrench, cutter, drilling etc and making of holes and taping to accommodate new nut-bolts accordingly.

Dismantling of existing damaged connection plates from motors by disconnecting the cables with proper safety and by duly removing the nut bolts by spanner, wrench, and cutter, drilling etc and making of holes and taping to accommodate new nut-bolts accordingly.

Providing/Fixing of new motor fan cover made of MS sheet of suitable size duly holed as per motor tapped holes and having 6 holes of 2inch dia. on top of the motor for air circulation with a second MS sheet of suitable size at a gap of 3inch duly welded with four nos.

Providing/Fixing of new connection box with cover plate made of CI/MS sheet (6mm) duly holed as per motor tapped holes suitable for 50 HP Vertical Aeration Motors and painting the same with putting one coat of epoxy primer and two coats of epoxy paint of phirozicolour.

Providing/Fixing of new hooks to lift motors made of CI suitable for 50 HP Vertical Aeration Motors as per sample and painting the same with putting one coat of epoxy primer and two coats of epoxy paint of phirozicolour.

Providing of S.S High Tensile Harden foundation bolt as per sample size 50 mm dia. x 450 mm long approx. with 4 Nos. nuts & washers etc.

Fixing of above foundation bolt by welding machine, gas cutter& required civil work as per requirement at site.

Re-installation of the complete gear box unit, motor, propeller & propeller shaft with the base frame after fixing/ grouting foundation bolt in RCC slab i/c cutting suitable size holes with power drill and pouring suitable strength Cement concrete mortar with the help of chain pulley block, man power, tools & tackles as required at site.

Cartage to & fro from site to workshop. The job includes hiring of heavy labour for loading & unloading.

Testing & commissioning of complete unit on load satisfactorily.

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