operation and comprehensive maintenance of ems at te bldg and staffs quarter chhapra , operation & comprehensive maintenance of the following electro- mechanical services as per specifications and details of services etc . attached . a ) e . i . & fans b ) pumps c ) compound-lighting d ) lightning conductor e ) sub-station f ) avr g ) e . a . set h ) fire extinguishers . i ) split a/c unit , window a/c units , water coolers . j ) package ac plant- k ) geysers . l ) lifts- m ) staff quarter note :1]the agency shall maintain the defect free services & shall submit report while raising the due payments . , 1st year , 2nd year , servicing & routine maintenance ( b check ) of 2x250 kva [m/s . koel make] capacity of dg set complete with cleaning of air cleaner element , replacement of engine lube oil of proper grade ( seal pack of reputed make ) , replacement of lube oil filter elements , replacement of fuel filter elements , check & reset injector pressure , check & reset injector pump timing , retighten cylinder head nuts , adjust engine valve clearance , replacement of radiator water by fresh distilled water with addition of coolant additive concentrate , cleaning of radiator fins , drain sediments from water separator , check inlet air restriction , check air piping , belt tensions i/c cleaning & dedusting of alternator , control panel , fuel tank , tightening & maintaining of all hose connections , electrical connections , battery connections etc & actual load testing of dg set after servicing etc as directed . [b check once in 12 months . servicing should be done from authorised dealer only] , supplying & fixing of fully charged 12 volt , 180ah lead acid semi maintenance free battery for starting of 250 kva dg set complete with end sockets etc . as reqd . note-1 ) the battery ( s ) of each dg set shall be replaced once during currency of contract & agency shall consider rebate for old battery while quoting of rates .