service contract for mechanical maintenance for a period of two months for stgi and ii under chp mm sgtpp wbpdcl through elt => limited- 1 maintenance contract for mechanical at chp,sgtpp 2 mandatory job 3 roller screen overhauling 4 crusher overhauling 5 conveyor major servicing (conveyor-3a/b, 5a/b, bcn-12a/b, 15a/b, 16a/b, 17a/b) 6 replacement of drive pulley of conveyor including apron feeder 7 replacement of gearbox of stage i (conveyor 3a/b, 5a/b, 6a/b, boom, intermediate, slew drive ofs/r) 8 compressor overhauling of stage i 9 paddle feeder drive end(travel gear side) track wheel bearing replacement), stage i 10 dust extraction system overhauling & allied job 11 hydraulic pipeline area major cleaning of conveyor hydraulic drive, stage ii 12 track hopper ,wagon tippler, bunker floor gratings major repairing 13 hydraulic system flushing & allied jobs during any major hydraulic pump & motor failure, stageii 14 conveyor belt replacement (above 25 mtr.)