supply of modified brush holdermodified brush holder, modified brush holder revolving ring assembly for hitachi traction motor type hs-15250a as per following drawings and mo difications: ( i ) 10q-750-249 alt.h. ( ii ) 10q-750-317 alt.e. ( iii ) 10q-750-320 alt.h. ( iv ) rdso modification wag-5 / 27 ( new wag5 / 240 ) . ( v ) rdso modification elrs / ms / 0347 rev. 0 ( vi ) rdso modification sheet no. elrs / ms / 0329 ( rev.0 ) dtd. 18-04-2004 amendment 1. note.: all accessories should to be procured from clw approved sources. [ warranty period: 30 months after the date of delivery ]