operation & comprehensive maintenance of electromechanical services for wtr earth satellite station yeur ( thane ) ., comprehensive maintenance and round the clock operation of various electromechanical services as per details given in relevant sections by deploying the required / by automation means including specialized manpower and by arranging required tools and plant etc to keep all the services operational upto the required standards except item nos . 2 & 3 below which shall be paid extra as per running hours of dg sets . , a ) services included are 1 ) ei & fans 2 ) compound lighting 3 ) lightning conductor 4 ) pumps 5 ) 2 x 315 kva ( 22 kv outdoor ) substation 6 ) 2 x 125 kva ea sets 7 ) fire detection and alarm system 8 ) ( 3+1 ) x 10 tr package type a c plant 9 ) window & split a / c units 10 ) fire extinguishers , contractors to take all steps to undertake preventive / special maintenance and testing to keep the system at optimum working condition . size of various services is given in section - i , servicing & routine maintenance ( b check ) of following 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 . , i ) 2 x 125 kva dg sets , supplying & fixing of fully charged 12 volt , 180ah lead acid maintenance free battery for starting of 125 kva e / a sets complete with end sockets etc . note- 1 ) the battery ( s ) of each dg set shall be replaced ( measurable basis ) once during currency of contract & agency shall consider rebate for old battery while quoting of rates . additional requirement to be borne by agency without extra cost .