CPP PROPELLER SHAFT,RUDDERS,STERN TUBE BEARINGS AND TAIL SHAFT PORT and STARBOARD WORKS ON SCI SABARMATI

Amount

CPP PROPELLER SHAFT ,STERN TUBE BEARINGS AND RUDDERS (PORT & STARBOARD ) MAKE: KAMOME PROPELLER CO. LTD CPP TYPE: CPR-80AVCA 4 BLADED

CPP PROPELLER SHAFT REMOVAL Rope guards to be removed, cleaned and refitted after completion of the job. Propeller drop to measure with ME unit one at TDC,before and after renewal of seals.Stern tube system oil to be drained. Collected in empty drums. Complete withdrawal of tail end shaft by disconnecting the muff couplings. All fitted bolts to be removed from muff coupling. While withdrawing tail shaft care should be taken for the temperature sensors provided in the stern tube in both aft and fwd bushes. After withdrawal the tail end shaft to place on support on dock floor safely with all locking.stern tube to be thoroughly cleaned and stern tube bushes to be polished. Propeller’s blades to buffed/polished and surface finished, apply grease/varnish. Blade roots and tips (both sides) to be checked for cracks using dye penetrant test by competent team and shown to surveyor.Calibration of tail shaft and stern tube bushes(FWD & AFT),Port & stbd tail end shafts (propeller shafts) along with propeller hub & blades to be produced for survey,required NDT tests(DP,MPI.ect..) to be carried out to fulfil class requirements and After completion of survey same to fit in place along with propeller and accessories as per procedure. All clearances to measure and restored to class recommendation. After fitting of tail shaft, stern tube fresh oil to be taken in the system and rechecked for any leakages for 12 hrs before undocking of the vessel.All activities to be carried out in the presence of Suptd /Surveyor/CEO.Rope guard zinc anode to be replaced with new. All consumables,Rope guard zinc anodes, grease, varnish, sealant putty, adaptors, ss rope net cutter, wrapping sheets, copper washers,ss lashing wires, polishing rolls,ss fasteners,DP test kits are procure,supply and fitment in contractor scope. All machining works, hydraulic power packs, hydraulic jacks, hydraulic torque tightening machine, pullers, certified lifting tools and slings,eraction of staging and materials, eye pad welding and testing, all welding and gas cutting works are in contractor scope. After completion of all repairs, Propeller pitch operation to check and zero pitch calibration to carried out for both units and satisfactory trials(Dock trials and Sea trials) to be shown to ship staff/surveyor/superintendent.

RUDDERS ( port and stbd) The port and stbd rudder drop and jumping clearances to be taken and inspection to be carried out,Rudders to be removed from position and kept on dock blocks,Survey to be showned to class and ship staff, post completion of survey the Rudders to be fitted in position.All bolts to be locked and cemented. For above work all Consumables like cement/ sealing puttey,grease are procure,supply and fitment in contractor scope.eye plate welding works, Gas cutting works and Certified Lifting tools and Tackles are in Contractor scope

ROPE GUARDS Fabrication of new ROPE GUARDS, Size: 500 mm dia x 400 mm width X 14mm thick, GRADE -A STEEL,supply of materials and consumables are within contractor scope.

PROPELLER BLADES SEALS RENEWAL Remove the propeller blades from Hub,Cleane the blade foot area thoroughly,Dismantle and remove the existing foot rings and seals,DP test carried out on blades foot area and provide NDT reports,Refitment of propeller blades with new seals(ship supply) and blade bolts to be tightened required torque as per makers procedures and bolts to be locked in presence of ships staff, arranging of hydraulic torque tightening machine in contractor scope.

PROPELLER HUB OVERHAULING Propeller Hub complete unit to be dismantled & overhauled using new spares(ship supply). Servo cylinder, push pull rod, cross head etc.. as per maker's procedure, required NDT tests(DP,MPI.ect..) to be carried out with competent person and provide NDT reports,After completion of overhaul, Hub complete unit to be assembled, pressure tested and fitted back in position.all bolts to be tightened required torque as per makers procedures and bolts to be locked in presence of ships staff, arranging of hydraulic torque tightening machine in contractor scope.

PROPELLER SHAFTS TRUENESS CHECKS Trueness checks of both propeller shafts to be checked and report submitted.For truness checks,Provision of transportation,loading and unloading of shafts shell be with in the contractor's scope.

PROPELLER SHAFT BEARING JOURNAL AREA MACHINING AND POLISHING The new port propeller shaft being supplied by OEM fabricated to rough dimensions. Require shaft machining to final dimensions in way of CPP unit, OD box connections, stern tube bearing areas, seal units (fwd & aft), trueness check of shaft, flange coupling bolt holes to be reamed & polished and bolts to be torque tightened as per OEM procedures under OEM service engineer supervision. The STBD Propeller shaft to be skimmed and polished at bearing journal areas under OEM service engineer supervision. Provision of transportation,loading and unloading of shafts shell be with in the contractor's scope.

AFT & FWD STERN TUBE SEAL UNITS Aft & forward seals to be renewed with new seals(new seals ship supply), seals systems to be checked under static head for leakages post assembling of new seals.Chrome liners to be renewed(ship supply), chrome liners to be calibrated,machined and skimmed to the size,chrome liners machining works are within contractor scope.All plugs to be fitted with new copper washers and wire lashed with ss lashing wires.After fitment of Seal unit,system to checked for leakages and shown to ship staff.

PORT FWD STERN TUBE BEARING Remove old stern tube bearings and clean the housing thoroughly. Inspect stern tube bore and check for scoring, corrosion, or ovality. All necessary tools and materials are in contractor scope Fitment of new bearing into the stern tube housing. Insert bearings carefully into the stern tube without damaging surfaces. For Chock fasting Process, Position bearing liners inside the stern tube, cantering jigs or hydraulic jacks to simulate operational alignment. Install formwork/mold around the bearing housing. Remove jigs and all accessories after Chock fast has bonded correctly without cracks. All required materials and consumables are in contractor scope. All machining works, hydraulic jacks,pullers, certified lifting tools and slings,eraction of staging and materials, eye pad welding ,welding and gas cutting works are in contractor scope.

PORT AFT STERN TUBE BEARING Remove old stern tube bearings and clean the housing thoroughly. Inspect stern tube bore and check for scoring, corrosion, or ovality. All necessary tools and materials are in contractor scope Fitment of new bearing into the stern tube housing. Insert bearings carefully into the stern tube without damaging surfaces. For Chock fasting Process, Position bearing liners inside the stern tube, cantering jigs or hydraulic jacks to simulate operational alignment. Install formwork/mold around the bearing housing. Remove jigs and all accessories after Chock fast has bonded correctly without cracks. All required materials and consumables are in contractor scope. All machining works, hydraulic jacks,pullers, certified lifting tools and slings,eraction of staging and materials, eye pad welding ,welding and gas cutting works are in contractor scope.

CHOCK FASTING OF PORT STERN TUBE BEARINGS Chock fasting Process, After Positioning of stern tube bearings inside the stern tube. Mix and pour Chock fast resin carefully to avoid air entrapment. verify Chock fast bonding correctly without cracks or voids and shown to surveyor and ship staff.Chockfast batch certification and sample reports to be submitted to IRS and ship staff. All required materials like Chock fasting tins(6.8 kgs each) along with accessories and consumables are supply and fitment in contractor scope. eraction of staging and materials, Dam preparation for chock fasting, all welding and gas cutting works are in contractor scope.Additional Chock fasting tins if requried HSL will be provided at an extra charge on pro rate basis.

LASER ALIGNMENT OF PORT SHAFT LINE Laser Alignment for new stern tube bearings fitment in port Shaft line, mount laser alignment equipment on the shaft and align targets on both buses and bearing centres. Measure offsets and angular misalignments. Adjust shaft supports to achieve precise alignment within tolerances as per class requirements. After completion of above works system to be showned to IRS and Ship staff. Provide alignment reports.

MAN POWER ASSISTANCE Provide the Man power Assistance to Service engineer for Alignment of Stern tube bearings(FWD &AFT),Propeller shaft machining etc.. Skilled manpower per day 9 mandays.

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