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naval dockyard, mumbai - Irfc-nausena.nic.in

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DEPT: QC(E) C. No<br />

74<br />

SHIP: FC MADHUR<br />

NAVAL DOCKYARD, MUMBAI<br />

QUALITY ASSURANCE PLAN<br />

REV DATE: 23 May 12 FORM Q C E 0 7 4 R E 0 1 0<br />

No:01<br />

NO<br />

JOB TITLE :REFIT<br />

QAP No : QCE74 ­245 QAP DATE : 11­JUL­12 PAGE 5 OF 22<br />

E­20009 Defect Description<br />

Overhaul and clean both hydraulic rudder<br />

motor(Type­ HSG TK 70), renew top & bottom oil<br />

seals, piston seals, “O” r<strong>in</strong>gs as per sample and refit<br />

relief valves(set pressure­40 kg/cm2). Prove the<br />

system on board and offer trials. (Make­ Geeta Engg<br />

Works P ltd, Thane). Qty 02<br />

1 3 3<br />

Activity Description<br />

Dra<strong>in</strong> Oil from the motor. Disconnect all the<br />

associated hydraulic pipes, disconnect the<br />

potentiometer and feed back l<strong>in</strong>kage. Remove p<strong>in</strong><br />

and tie rod. Open all the fasteners hold<strong>in</strong>g the cover.<br />

Hold the rudder stock on the cha<strong>in</strong> block if tak<strong>in</strong>g<br />

whole load of the rudder stock. Loosen the nut<br />

hold<strong>in</strong>g the rudder stock. Remove the tiller block.<br />

Remove the oscillator piston along with the piston<br />

seal. Check the hous<strong>in</strong>g for scor<strong>in</strong>g if so follow the<br />

<strong>in</strong>struction by the QC(E) rep. check the bottom seal<br />

journal surface if scor<strong>in</strong>g the same must be mach<strong>in</strong>ed<br />

/ renew the sleeve. Check the centre bush for the<br />

clearances if excessive the same must be renewed.<br />

Renew bottom seal. Check the top seal journal and<br />

renew as above. Renew piston seal of OEM make. Fit<br />

all the components and pressure test for leakages if<br />

sat go for performance trials.<br />

DYT/INCOD/12­13/106(a)/PL­YCM/MADHUR­REFIT/420 87/127

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