bids are invited for custom bid for services - 2122 123 job 1 maintenance jobs of air preheater of boilers job 1 a leveling of rotor and inspection repair replacement of top bottom sealing strips housing seal angles of boilers qty 6 nos , custom bid for services - job 1 b replacement of top guide bearing of air pre heater qty 1 no , custom bid for services - job 1 c replacement of bottom support bearing of air pre heater qty 1 no , custom bid for services - job 1 d replacement of speed reducer assembly of air preheater of boilers qty 1 no , custom bid for services - job 2 maintenance job of id fd fans job 2 a removal dismantling assembly installation of id fd fan assembly qty 2 nos , custom bid for services - job 2 b checking and rectification of alignment of idfd fans of boilers qty 24 nos