spares for making readiness of stand by scrapper feeder for all the three units bottom ash hopper , supply of spares for making readiness of stand by scrapper feeder for all the three units bottom ash hopper , main drive gear box , main drive sprocket with shaft complete assembly , carrying side idler wheel complete assembly set , return side idler wheel (tension wheel) complete , holeset coupling for scrapper feeder , hydraulic motor , chain with paddles connector and ht bolt and nut , chain tension adjusting assembly , submersible idler wheel with bearing housing assembly , flight bar for scrapper feeder , scrapper feeder overflow ss 316 pipe with end flange