repairing of 01 no. dipper trip drum assembly and its mounting base. ii ) repairing of 02 nos. retainer of crowd system as float. ( b ) repairing of 04 nos. track pad lug of undercarriage assembly and pump of chain case assy and its foundation of s2 p&h 1900al shovel. ( c ) i ) repairing of 01 no. main motor sprocket assembly and keyway od shaft. ii ) repairing of 01 no. pto sprocket shaft assembly , removal and fitting of coupling half. at ashoka ocp.-2 welder 3 fitter 4 helper 5 turner 6 material cost 7 da cylinder 8 oxygen cylinder 9 low hydrogen electrode 10 steel electrode 11 grinding disc 4 12 drill bit 19 mm 13 gauging electrode 14 gasket p / n-1020z5747 15 gasket p / n-1020z5750 16 gasket p / n-102z5748 17 seal assembly p / n-1018z6734 18 retaining spring p / n-1018z5735 19 spring p / n-1017z113 20 coupling motor p / n-1018z8689 21 o-ring p / n-1045z1713 22 hiring cost 23 welding machine 24 grinding machine 25 lathe machine 26 drill machine 27 hydraulic jack and fixture 28 contractors profit