bids are invited for repairing of rig drive head of rotary gear, gear pulley, guide plates, left side and right side shall be replaced. , floating-sub shall be repaired. , pull down cylinder oil leakage found in rest position, rectify the same. , drill rod changer loaded only three drill rods and rod lock shall be repaired. , drill rod changer operating cylinder bracket shall be replaced. , power tong leg right side and left side cylinder seals and leg stopper plate with legs shall be changed with allen bolts. , new sprockets, pins and bearings shall be replaced. , table bush lock broken drill rod bush size enlarged. , new water injection pump shall be fitted. , hammer oil lubricator system shall be provided. , hydraulic oils all strainers and filters shall be replaced. , welding set and motors shall be replaced. , hammer opening device shall be provided. , wherever required, hydraulic hoses should be replaced with new hoses. , alignment and setting of all hydraulic hoses shall be made. , gauges shall be replaced , micro feed valves and direction valves shall be replaced. , additional micro feed valve shall be provided for mast raising cylinders. , rig mast and body painting shall be carried out. total quantity : 19