operation , maintenance , repairs and replacement for electrical and mechanical equipment to 147 mld capacity raw water pumping station at mohone and pure water treatment plant at barave for the period of two year . , item no . :-1operation , maintenance , repairs & replacement for electrical & mechanical equipment , to operate 147 mld capacity water works of barave water treatment plant at barave & water head works at mohane including all spare parts , labour for operating 24 x 7 , repair / replacement within stipulated time period , day to day maintenance of machinery , cost of all labour , material etc . as directed by the engineer incharge . under this item the work of operation ( including raw water pumps , chemical dosing , washing of filters , testing of water as per norms & pure water , wash water , recirculation pumps etc . ) , periodical & routine maintenance & repair of electrical & mechanical equipments with material , , reguler cleaning ( raw water chanel , raw water sum , areation fountain , clarifacculetor , filters , recirculation well , chlorine contact tank & pure water sump , sweeping & keep clean the premises of raw water pump house & barve wtp . , item no . 2overhauling with repairing 1250 kva /1600 kva transformer: dismantling the existing 1250 / 1600 kva , 22 kv/0 . 433 kv crompten greaves make on load tap changer type transformer by means of hydra/ crane of suitable capacity , cleaning all healthy parts , laminations ( in assembly ) , tank , insulating sleeves etc . overhauling the transformer with replacement of damaged parts and rewound coils and reassembling of top yoke including brazing , soldering , sleeving and insulating as required , vacuum oven drying of assembled core . reassembling of complete transformer by tanking the dried core , cleaning all gaskets , making terminal connections , oil filling , filtration , rewinding of hv & lv coils , using new copper coil with new insulation including internal & external painting of transformer with rebate for damaged material , to & fro transportation charges loading/ unloading making connections with all required materials , testing , commissioning with six month guarantee etc complete . , item no . 3overhauling with repairing 500 kva transformer: dismantling the existing 500 kva , 22 kv/0 . 433 kv volt amps make off load tap chane type transformer by means of hydra/ crane of suitable capacity , cleaning all healthy parts , laminations ( in assembly ) , tank , insulating sleeves etc . overhauling the transformer with replacement of damaged parts and rewound coils and reassembling of top yoke including brazing , soldering , sleeving and insulating as required , vacuum oven drying of assembled core . reassembling of complete transformer by tanking the dried core , cleaning all gaskets , making terminal connections , oil filling , filtration , rewinding of hv & lv coils , using new copper coil with new insulation including internal & external painting of transformer with rebate for damaged material , to & fro transportation charges loading/ unloading making connections with all required materials , testing , commissioning with six month guarantee etc complete . , item no . 4overhauling with repairing 1800 kva transformer: dismantling the existing 1800 kva , 22 kv/3 . 3 kv volt amps make off load tap chane type transformer by means of hydra/ crane of suitable capacity , cleaning all healthy parts , laminations ( in assembly ) , tank , insulating sleeves etc . overhauling the transformer with replacement of damaged parts and rewound coils and reassembling of top yoke including brazing , soldering , sleeving and insulating as required , vacuum oven drying of assembled core . reassembling of complete transformer by tanking the dried core , cleaning all gaskets , making terminal connections , oil filling , filtration , rewinding of hv & lv coils , using new copper coil with new insulation including internal & external painting of transformer with rebate for damaged material , to & fro transportation charges loading/ unloading making connections with all required materials , testing , commissioning with six month guarantee etc complete .