annual maintenance contract for providing contract for operation and maintenance of dozer make beml hydra make escorts and pay loader make bem l and maintenance of fire tender at chp sgtpp for one 01 year , amc for providing contract for o&m of dozer ( make: beml ) , hydra ( make: escorts ) , pay loader ( make: beml ) & maintenance of fire tender at chp sgtpp for one ( 01 ) year . , contract for both operation & maintenance of four ( 4 ) nos . bd-355 dozer ( make: beml ) , one ( 01 ) no . 12 ton hydra ( make: escorts ) , two ( 02 ) nos . of pay loader ( make:beml ) & maintenance of three ( 03 ) nos . fire tender at chp , sgtpp , 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 .