supply of carrying out maintenance schedulecarrying out maintenance schedule,rate contract for carrying out maintenance schedule ss ii (36 month) of automatic ic doo r make-prag polymers in one bu (8 doors) of vb train set rake at zonal railways for 2 years. work shal l include: 1. maintenance activities to be performed, 2.replacement of must change items listed below i. thk synthetic grease 70g afa-(part no 211100009) ii.silent block (part no 211100015) iii.nut with carrier ( part no 211100011) iv.any other must change item required and 3.replacement of condition based items on need basis.] [ warranty period: 30 months after the date of delivery ] ]