Tender For dredger drum disc (disc for tumbler/turret gear box), plasser part no. 61.04.519 as per rd so drawing no. rdso/tm/13/21 and rdso specification no. tm/hm/6/498. warranty: 30 km of deep screen ing or 30 months from date of supply whichever is earlier. [ warranty period: 30 months after the date of delivery ]