supply of coh / aoh of tg-set of unit no. 1, 2, 3 & 4 sgtps, mppgcl, birsinghpur-1 part-a 1.1 bearing inspection work of tg , casing roll check, bump check, centering, horn drop test, rotors cro checks, alignment, coupling, oh of mop & barring gear including eot crane operator 1.2 hp turbine overhaul 1.3 ip turbine overhaul 1.4 lp turbine overhaul 1.5 inspection and revisioning of ipt & lpt gland box ( front & rear ) 1.6 overhauling of hydraulically operated valves ( complete package including f1 to f8 ) 1.61 esv & hp control valves and its servomotors 1.62 iv & ip control valves and its servomotors 1.63 lpbp stop & control valves and its servomotors 1.64 lpbp water injection valves and its servomotors 1.65 crh nrv and its servomotors 1.66 hpbp steam control valves & hpbp spray control valves 1.67 gs & leak steam cvs 1.68 overhauling of extraction nrv 1.7 overhauling of ms strainer / hrh strainer ( 04 nos ) 1.8 coh of generator and exciter ( with rotor thread out ) 1.9 general aoh of generator & exciter along with seal body inspection 2 part-b- on site refining and machining work of hpt module ( inner casing & rotor inter stage sealing fins, rotor balance drum & gland seals, shaft seal segments ) during aoh / coh of tg set of unit no. 1, 2, 3 &4 ( ph-i & ii ) at sgtps , mppgcl, birsinghpur 2.1 refining and machining work of hpt rotor interstage sealing fins, rotor balance drum & gland seals, shaft seal segments, ( for unit 1, 3 and 4 ) 2.2 refining and machining work of hpt module inner casing ( for unit 1, 2, 3 and 4 ) 2.3 slow speed balancing of hp rotor ( for unit 1, 3 and 4 )