work contract for various work of btg, bop of emd 4 during aoh of unit no. 11, stps sarni - 1.011 cleaning work of shaft insulator and replacement of defective insulator if any, with complete painting of housing inside and outside 1.012 dismantling, removal & testing of shaft insulator heater, refitting, replacing the defective if any. 1.013 dismantling, removal & testing of hopper heater & support insulator heater, refitting , replacement of the defective if any. the work includes cleaning of heater pockets & packing / sealing 1.014 overhauling & painting of disconnecting boxes of hvr transformer 1.015 complete overhauling work of emitting & collecting, gas distribution rapping motors including disconnecting , shifting & re-installation. 1.016 repairing, painting of rapping motor covers by standard quality paint. 1.017 cleaning of support insulators and support insulator boxes.work include opening and closing of box covers and their repairing & painting.