annual contract for mechanical maintenance electrical maintenance and operation of ash handling plant indure make stage ii 2x500 mw annual contract for mechanical maintenance electrical maintenance and operation of ash handling plant indure make stage ii 2x500 mw sgtpp for 06 months , annual contract for mechanical maintenance , electrical maintenance and operation of ash handling plant ( indure make ) , stage ii , 2x500 mw sgtpp . , mandatory job : mechanical maintenance work of ahp for 06 months , mandatory job : electrical maintenance work of ahp for 06 months , mandatory job : operation of ahp for 06 months , optional job : cleaning of economizer hopper ash by manual method ( including bagging & bag will be provived by the party ) or by water per hopper basis during shut down condition and disposal of ash at suitable location , optional job : cleaning of air-preheater hoper ash by manual method ( including bagging & bag will be provived by the party ) or by water per hopper basis during shut down condition and disposal of ash at suitable location , optional job : cleaning of clinkers , damaged refractory or resuadual ash from inside the bottom ash hopper during shut down condition and disposal of same at suitable location . , optional job : over hauling of ba clinker grinder including dismantling & reffiting of clinker grinder , chute , optional job : replacement of power cylinder for ba hopper feed gate , optional job : alignment of ba hopper feed gate during during shutdown condition . strengthening of different supports feed gate and if required replacement of guide rail , roller , wedge etc . , optional job : overhauling of vacuum pumps including dismantling & refitting of vacuum pump . , optional job : replacement of flushing apparatus including dismantling & refitting of flushing apparatus . , optional job : ht cable jointing work . , optional job : cable laying 185 sq . mm . 3core cu cable , hydra and trailer with driver