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by Big Pete
Thu Jul 30, 2009 5:35 am
Forum: The Workshop
Topic: pv fiassco
Replies: 11
Views: 4081

Re: pv fiassco

Hi again, Further to my earlier post I have had problems in the past with totally spurious cards caused by blockages or leakages of the indicator cock, or leakages on the screw thread on the cock connection to the indicator machine. If everything has been overhauled, all the fuel rack standouts on t...
by Big Pete
Thu Jul 30, 2009 2:18 am
Forum: The Workshop
Topic: Crankshaft Deflection
Replies: 22
Views: 16964

Re: Crankshaft Deflection

Hi Diesel Dame, Taking leads is a way of measuring bearing clearances. Open up the bearing, and place lengths of lead wire (hence the name) across the bearing journal, refit the top half of the bearing and tighten down according to makers instructions. The lead wire will then be flattenned down to t...
by Big Pete
Wed Jul 29, 2009 2:12 am
Forum: The Workshop
Topic: pv fiassco
Replies: 11
Views: 4081

Re: pv fiassco

Hi,

This may be a stupid question, but have you tried changing or overhauling the indicator cock itself?
Big Pete.
by Big Pete
Wed Jul 29, 2009 2:00 am
Forum: The Workshop
Topic: Crankshaft Deflection
Replies: 22
Views: 16964

Re: Crankshaft Deflection

Hi Sorry I have not answered before, As fitted the crankshaft is perfectly aligned with the bearings, usually deflections are small except where they are influenced by the mass of the flywheel, hanging off the end of the crankshaft which will cause the the end of the crankshaft to droop. Try to visu...
by Big Pete
Sat May 09, 2009 8:39 am
Forum: The Workshop
Topic: Corrosion pieces
Replies: 6
Views: 4955

Re: Corrosion pieces

Hi Guys, Thanks for your replies, they confirmed the way I was thinking. In the drawings the corrossion pieces are just short lengths of pipe, in the middle of the pipework between the sea inlet and the cooler and between the cooler and the overboard discharge. On the drawings we have a total of 6 p...
by Big Pete
Mon Apr 27, 2009 10:31 am
Forum: The Workshop
Topic: Corrosion pieces
Replies: 6
Views: 4955

Corrosion pieces

Can anyone help me? According to the drawings of the sea water system on my ship, Corrossion pieces were fitted in the pipe systems. Most of the system is made of 90% Copper, 10% Nickel Alloy, with chemical dosing pipes in stainless steel. There are some pipes in Galvanised steel, which I suspect mu...
by Big Pete
Sat Apr 25, 2009 1:07 am
Forum: The Workshop
Topic: Lyngsö PCS2200
Replies: 3
Views: 2654

Re: Lyngsö PCS2200

I am not familiar with this system either, but in many systems where temperatures are measured electronically from a PT100 sensor, or similar, the system has to be calibrated. Probably somewhere in the instruction manual there will be instructions for this. In some systems you place the sensor in a ...
by Big Pete
Sat Apr 25, 2009 12:44 am
Forum: The Workshop
Topic: Crankshaft Deflection
Replies: 22
Views: 16964

Re: Crankshaft Deflection

Crankshaft deflections will not reveal any problems with the crankshaft or the bearings. Even if the crankshaft is bent. They will reveal a problem with the alignement of the main bearings, this can be caused by a failure of the chocking arrangements or distortion of the Hull. This is why, in order ...
by Big Pete
Sat Apr 25, 2009 12:36 am
Forum: The Workshop
Topic: Fittings and Threads
Replies: 11
Views: 5507

Re: Fittings and Threads

It all depends on what you have got. BSP ( British Standard Pipe Threads) are the same as metric pipe threads. If you try to screw a BSP pipe thread to an American NPT (National Pipe thread) fitting, they will screw together perfectly for one turn then lock solid (different TPI), trying to force the...
by Big Pete
Sat Apr 25, 2009 12:20 am
Forum: The Workshop
Topic: Cut Backs
Replies: 10
Views: 4188

Re: Cut Backs

Think things through, I remember back in the early eighties I was 2/E on a Panamanian flag ship, managed from London and we received a circular letter from the company which copied some energy saving practices of a German Chief Engineer in the company. They included, switching off all the engine roo...

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