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| 1 | Rudder clearencesRudder drop, Jumping clearance,bush clearances and pintle bush clearance are to be measured and recorded.same to be offer to IRS and ship staff.Examine rudder pintle bearings and lubricated with greasebefore undocking. |
| 2 | RudderRudder to be removed from its position,cleaned,pressure tested and float coated and offer to IRS and ship staff.After survey same to be fitted back and plam bolts to be locked and cemented.Lifting eye pads fabrication,welding,testing and removal after completion of works.all consumables like grease, fish oil,sealant putty,cement, copper washers,drain plugs are to be supplied in contractor scope. all machining works,hydraulic jacks and hydraulic power pack, certified chain pulleys and slings,welding and gas cutting works arein contractor scope |
| 3 | Laser sightingLaser sighting and alignment to be carried out for both upper and lower bearing housing,Measure offsets and angular misalignments,showned to OEM and IRS,reporrts to be submitted. |
| 4 | Rudder stockRudder stock,Tiller unit,carrier bearing,gland unit and hydraulic acuator unit along with hydraulic rams to be reomved,Rudder stock,carrier bearing unit, upper and lower bearing bushes calibrated and offer to IRS andship staff,rudder stock NDT to be carried out,after completion of survey rudder stock to be fitted back along with new gland packing.Lifting eye pads fabrication,welding,testing and removal after completion of works.allconsumables and machining works, hydraulic jacks and hydraulic power pack, certified chain pulleys and slings,welding and gas cutting works are in contractor scope |
| 5 | Lower bearing bushRemove Lower bearing bush and clean the housing thoroughly.Inspect housing bore and check for scoring, corrosion, or ovality. All necessary tools and materials are in contractor scope.new bearing to be machined asper laser alignment report.Fitment of new bearings (usually by dry ice or liquid nitrogen) to shrink-fit into the tube housing. Insert bearings carefully into the housing without damaging surfaces. Allow the bearings to reach ambient temperature and achieve a tight interference fit and locked with screws.and bearingclearances showned to OEM and IRS .Satisfactory operation trials to be showned.All required consumables like dry ice or liquid nitrogen,and all machining works, hydraulic power packs, hydraulic jacks,pullers, certified lifting tools and slings, eye pad welding and testing, all welding and gascutting works are in contractor scope.Bush dimensions approx : ID=812mm,OD=871mm,L=930 mm |
| 6 | Upper bearing bushRemove Upper bearing bush and clean the housing thoroughly.Inspect housing bore and check for scoring, corrosion, or ovality. All necessary tools and materials are in contractor scope.new bearing to be machined as per laser alignment report.Fitment of new bearings (usually by dry ice or liquid nitrogen) to shrink-fit into the tube housing. Insert bearings carefully into the housing without damaging surfaces. Allow the bearings to reach ambient temperature and achieve a tight interference fit.and bearing clearances showned to OEM and IRS .Satisfactory operation trials to be showned.All required consumables like dry ice or liquid nitrogen,and all machining works, hydraulic power packs, hydraulic jacks,pullers, certified lifting tools and slings, eye pad welding and testing, all welding and gas cutting works are in contractor scope.Bush dimensions approx : ID=500mm,OD=550mm,L=550 mm |
| 7 | Carrier bearing/Thrust bearingRemove Thrust bearing and clean the housing thoroughly and new bearing to be fitted.All necessary tools and materials are in contractor scope. satisfactory operation trials to be showned to OEM and IRS.All required consumables and all machining works, hydraulic power packs, hydraulic jacks,pullers, certified lifting tools and slings, eye pad welding and testing, all welding and gas cutting works are in contractorscope.Approx.dia= 1800 mm |
| 8 | Rudder stock lower bearing sleeveRemove exsiting rudder stock lower bearing sleeve and clean thoroughly and new sleeve to be mechined as per required dimensions and fitted in position(usually by electric heating or oil bath) to shrink-fit . All necessary tools and materials are in contractor scope.Satisfactory operation trials to be showned.All required consumables and all machining works, pullers, certified lifting tools and slings,all welding and gas cutting works are in contractor scope.Sleeve dimensions approx : ID=770mm,OD=820mm,L=1000 mm |
| 9 | Rudder stock upper bearing sleeveRemove exsiting rudder stock upper bearing sleeve and clean thoroughly and new sleeve to be mechined as per required dimensions and fitted in position(usually by electric heating or oil bath) to shrink-fit . Allnecessary tools and materials are in contractor scope.Satisfactory operation trials to be showned.All required consumables and all machining works, pullers, certified lifting tools and slings,all welding and gascutting works are in contractor scope.Sleeve dimensions approx : ID=450mm,OD=500mm,L=600 mm |
