Skip to main content

Tie rod tightness- SMC

  • Take all safety precautions, immobilzation etc. ..


  • Inform company and take permission.
  • Read and understand manuals and note down all clearance.
  • Carry out risk assessment
  • Check for special tools and spares.
  • Check last report and shop trial report.
  • Obtain immobilization certificate from port authority.
  • Debrief to all crew members (tool box meeting) n ensure every person involved on job are well aware about his duty.
  • After F.W.E. ensure telegraph on stop and fuel lever 0. Then take control to ECR.
  • Let the l.o. p/p run for approx. 30 min 4 cooling down of engine.
  • Lock the t/c rotor.
  • Shut off starting air supply at starting air receiver.
  • Open indicator cock.
  • Stop l.o. p/p after half an hour.
  • Take propeller clearance.
  • Engange turning gear.
  • Losen pinching screw of tie rod.
  • Remove protective caps.
  • Clean contact faces and mount hydraulic tool on a pair of stay bolt positioned opposite to each other on middle of engine.
  • Start retightening stay bolt and proceed working from middle towards one end of engine and then from middle again towards the other end.
  • Maintain  tightening press according to manual (900 bar) n retighten the bolt with tommy bar. Before relieving system press check with feeler gauge that nuts bears against contact face.
  • Reconnect hyd. Tool to pair of stay bolt first tightened. Raise press 10% less than given in manual (900 bar) and check if nut is loose.
  • If nut is not loose, tighten the stay bolt to 900 bar. If nut is loose, tighten all stay bolts once again to 900 bar.
  • After completion retighten the protective cover.


Popular posts from this blog

Differences between MC/MC-C and ME/ME-C engines

The electrohydraulic control mechanisms of the ME engine replace the following components of the conventional MC engine: Chain drive for camshaft Camshaft with fuel cams, exhaust cams and indicator cams Fuel pump actuating gear, including roller guides and reversing mechanism Conventional fuel pressure booster and VIT system Exhaust valve actuating gear and roller guides Engine driven starting air distributor Electronic governor with actuator Regulating shaft Engine side control console Mechanical cylinder lubricators. The Engine Control System of the ME engine comprises: Control units Hydraulic power supply unit Hydraulic cylinder units, including: Electronically controlled fuel injection, and Electronically controlled exhaust valve activation Electronically controlled starting air valves Electronically controlled auxiliary blowers Integrated electronic governor functions Tacho system Electronically controlled Alpha lubricators

Why is a man hole door elliptical in shape?

Any opening in a pressure vessel is kept to a minimum and for a man entry an elliptical hole  is lesser in size than the corresponding circular hole. More over it is prime concern to have a  smoothed generous radius at the corners to eliminate stress concentration. Hence other  geometrical shapes like rectangle and square are ruled out.  To compensate for the loss of material in the shell due to opening, a doubler ring has to be  provided around the opening. The thickness of the ring depends on the axis length along the  dirrection in which the stresses are maximum and the thickness of the shell. It is important to  align the minor axis along the length of the vessel, as the stress in this direction is  maximum. Longitudinal stress: Pd/2t where P= pressure inside the vessel, d= diameter of the arc, t=  thickness of the shell plating  Circumferential stress: Pd/4t  More over a considerable material and weight saving is achieved as minor is along the  direction of maximum stress.

Shell Expansion Plan

It is a two dimensional drawing of a three dimensional surface of the ship’s hull form. This plan is very useful for the following information:It is used for marking the location of a hull Damage on this plan by identifying the strake number , letter and frame number so that the exact location of the damage and also suggested repairs are marked in a localised copy. The shell expansion can be used for finding areas of painting surfaces such as topside, boot topping and bottom areas by applying Simpsons rules directly.  In the shell expansion the vertical scale used is different from the horizontal scale and a suitable adjustment has to be made when calculating areas. This becomes useful in solving disputes concerning areas of preparation and painting. It gives information on the thickness of the original strake which is indicated by the number in the circle shown in the strake.  The quality of steel used is also shown by letters A,B,D E and AH, BH,DH, EH.