Skip to main content

Tie rod tightness- SMC

  • Take all safety precautions, immobilzation etc. ..

Procedure:

  • 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.

Labels:

Comments

Post a Comment

If you have any doubts.Please let me know

Popular posts from this blog

Manganese bronze is not typically used as a propeller material .Why

1. High cost: Manganese bronze is a costly alloy, making it less economical for large propellers. 2. Low strength-to-weight ratio: Compared to other propeller materials like nickel-aluminum bronze or stainless steel, manganese bronze has a lower strength-to-weight ratio. 3. Susceptible to corrosion: Manganese bronze can corrode in seawater, especially when exposed to high velocities and turbulence. 4. Poor cavitation resistance: Manganese bronze is more prone to cavitation damage than other materials. 5. Difficult to cast and machine: Manganese bronze is challenging to cast and machine, making it less desirable for complex propeller geometries. 6. Limited weldability: Manganese bronze has poor weldability, making repairs and modifications difficult. Nickel-aluminum bronze or stainless steel are commonly used for propellers due to their: - High strength and durability - Excellent corrosion resistance - Good cavitation resistance - Ease of casting and machining - Weldability
107 comments
Read more

MAN B&W MC Engine VIT Pump

The pump is basically a jerk type with a plunger moving in a matched barrel, using two helical grooves machined in the plunger to control the end of injection by uncovering spill ports and causing the discharge pressure to drop rapidly, thus causing the needle valve in the injector to close. Oil is supplied to the barrel via the spill ports and a suction valve. The suction valve, situated at the top of the barrel opens when the pressure in the  barrel falls below the supply pump pressure; i.e. during downward stroke of plunger, while spill ports are covered by plunger. Replaceable erosion plugs  are fitted in the pump housing opposite the spill ports. The high pressure oil, spilling back, as the edge of the helix uncovers the s...
Post a Comment
Read more

Main engine interlocks

Interlocks are provided so that the engine can be started or reversed only when certain conditions have been fulfilled. When there is a remote control of engines, it is essential to have interlocks. This reduces the possibility of engine damage and any hazards to the operating personnel. Turning gear Interlock . This device prevents the engine from being started if the Turning gear is engaged. Running Direction Interlock . This prevents the fuel from being supplied if the running direction of the engine does not match the Telegraph. Starting Air Distributor in end position . This prevents starting from taking place if the shifting of the Distributor has not been completed. Main Lube. oil pressure, Piston cooling pressure, Jacket water pressure, and important parameters must be above the required minimum. Auxiliary Blower Interlock . The Auxiliary Blower is provided in case of Constant pressure turbo charging. Air Spring pressure Interlock . In case of the present generation...
9 comments
Read more