PROPELLER SHAFT REPAIRS/ROUTINES TO BE

Amount

VESSEL : INS JAMUNA WO.NO:22040 DL NOS : 20009.01,20311,20311,20008.03,20010,20011,20012,20013,20015.01 SUB:"PROPELLER SHAFT REPAIRS/ROUTINES TO BE UNDERTAKEN UNDER OEM SUPERVISION ON INS JAMUNA.”

Port and Stbd. propeller shaft drop to be taken and recorded (Before/After).Stern oil from both the Stern tube to be drained and new oil to be taken in (Ship supply).Required eye pads to be welded for withdrawal of shafts.clean and polish propellers( to be done soon after docking),examine propeller for damage and determine fitness for further use.ndt test to be carried out on propeller blades with qualified ndt technician in presence of class/nsry -10 blades.report to be submitted.ndt is under vendor scope.carry out visual check of all external bolts locking strips and wire.Propellers to be preserved with varnish/suitable preserving agent as per Indian Navy standard.

Stern bush & A-bracket clearances to be recorded and report to be submitted.

Propeller shafts (P & S) are to be decoupled using hydraulic power pack with suitable markings on sleeve/muff couplings , withdrawn completely for inspection. After DP/MP test on bearing areas and servicing, same to be fitted back in position including coupling, after inspection / survey. Propeller shaft Fwd & Aft Liners/bushes & shaft to be calibrated, renewed as required and seals is to be renewed (Liners, fwd & aft seal ship's supply). Satisfactory trials to be shown.NDT to be carried out by qualified level-3 technician in presence of IRS. NDT technician during class inspection to be arranged by the vendor along with necessary consumables like dp test kit,MP spray bottles etc.stern bush and shaft to be calibrated and report tobe submitted .Calibrated tools to be used for all measurements.certificates to be produced. Required chain blocks,lifting belts,slings,hydraulic powerpack & jacks, of suitable capacities with load test certificates only to be used and the same are to be produced.Sleeve coupling/muff coupling to be overhauled.alignment readings to be recorded (between gear box and shaft) before and after shaft routines.

Stern tube Fwd & Aft bearing bushes to be renewed (bearings hsl supply) (Bushes to be machined to match the interference fit). Machining of bushes is vendor scope.consumable required during fitment of bushes viz.,dry ice ,studs are to be arranged by vendor.jack load test of bearings to be carried out and report to be submitted

Jack-up load test of bearings (stern tube bearings,plummer blocks,stub bearings) to be carried out and report to be submitted .Necessary arrangement for jack -up load test to be arranged by vendor.Any correction to bring to original loading conditions by adding shims to be done by the vendor performing the test.

Propeller shaft line sighting to be done from Main engine gear box to A-bracket before and after fitment of stern tube bushes using LASER by competent person.Required LASER sighting arrangements by qualified technician with calibrated instruments to be arranged by vendor.The same to be offered to class/naval agencies

correction of shaft line to be carried out to achieve proper alignment of propeller shaft.Necessary machining /reaming/drilling of hole to shift the shaft lines to be carried out by vendor.Reports to be submitted.

Inspection of plummer bearings on each shaft line for scoring/corrosion by opening the covers.To be thoroughly cleaned and grease to be filled.Fresh grease to be filled.High heat resistant Grease to be supplied by vendor at no additional cost.

Renewal of plummer bearings(bearings HSL supply).Fresh grease to be filled.High heat resistant Grease to be supplied by vendor at no additional cost

Carry out sr routines of bulkhead glands. (maintop - 27428)an inspection be carried out every two years or during the shaft survey period when the diaphragm examined for evidence of wear.

Renewal of thordon bearings as per clearence reading of last docking.bearings hsl supply.during renewal necessary assistance to oem to be provided for fitment of the bearings.consumable required during fitment of bushes viz.,dry ice ,studs are to be arranged by vendor.

Carry out sr routines of stern tube seal of port and stbd shaft.overhauling of stern tube seals to be carried out ,spares hsl supply.forward and aft shaft seals are to be overhauled and tested before fitment onboard and after fitment .skimming of fwd and aft liners to be done under vendor scope.pressure test the stern tube seal and oil seal system as per simplex techinical instructions chapter 195-1.skimming of chrome liners during renewal of liners is under vendor scope cost inclusive.

Carry out sr routines of both stub bearing. open the top half of the bearing housing an examine the following: - (a) top and bottom bearing shell halves for wear and scoring. (b) dovel pin and the bearing shell securing ring. (c) bearing clearances. stub bearing seals to be renewed.seals HSL supply. consumables like lead wire and measuring instruments to be arranged by vendor.jack load test to be carried out and report tobe submitted, if any correction is required the same to be adjusted by adding shims and necessary reaming to be carried out to shift the position.Reaming arrangements to be made by vendor.Required New fit bolts tobe manufactured by the vendor .Jack-up load test to be carried out wherever required

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