Why Would We Do This?

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JK
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Why Would We Do This?

Postby JK » Tue Nov 30, 2010 10:52 am

I have been going through our digital pictures looking for something that might match Big Pete's latest photo thread, when I came across a series of photos that start with this:

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Any thoughts as to what is going on here?

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The Dieselduck
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Re: Why Would We Do This?

Postby The Dieselduck » Tue Nov 30, 2010 7:53 pm

Looks like you're getting ready for a pretty serious lift. I like the attention to details, rubber on the beams' edges.
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Big Pete
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Re: Why Would We Do This?

Postby Big Pete » Wed Dec 01, 2010 12:43 am

Looks like a saddle has been fabricated and fitted over the beam. exactly over the rubber fenders, was the plan to put a wire over the beam to suspend a chain block?
If the so the saddle should not have had sharp edges but radiused ends so that the rope would not be damaged.
I also note the chain block being hoisted by a chain block, the lower block appears to be fouling the I beam and the chains the pipe. Probably not best practice, but I have had to do similar things in the past. No ship can carry all the lifting gear required for every possible job.
I also note that the exhaust lagging in the background has been painted a very fetching shade of Pink! but I don't suppose that is the reason you posted this.
Look forward to hearinbg more.

BP
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Re: Why Would We Do This?

Postby JK » Wed Dec 01, 2010 5:15 am

Good eye BP on the chainfall. I think, given where this is all located that they were using the 1st chainfall to haul the others up. New eyes on something sure surprises a person. I have been looking at that pink since 2002 without blinking! It is actually the faded red exhaust blankets on the silencer.
Yes, Martin it was a big lift. The beams are the former boiler exhaust supports that were left behind when the ship was converted to diesel. In order to avoid bending the flange, a channel bar was bent to a uniform shape around the top flange. The MaK engine block that was to be lifted had a dry weight, with the liners, of about 15,000kg.

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JK
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Re: Why Would We Do This?

Postby JK » Wed Dec 01, 2010 9:24 am

Here the block is being lifted and moved to one side:

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:


This is where the block is going to sit until the crankshaft and bedplate are removed:

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There is just enough room to set the block down alongside the aux.gen :

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The original crankshaft in the bedplate:

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JK
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Re: Why Would We Do This?

Postby JK » Wed Dec 01, 2010 9:38 am

The new bedplate being chainfalled in through the ships side. We have maanged to squeeze the hull entry hole between the icebelt and the deck above. Then though a compartment, an alleyway then the engineroom.

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Some exhaust manifolds being moved in. You can see the overhead eyes that have been installed and tested to safe working load:

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A look at where this is all taking place:

Wed 7th-5.jpg
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Looking out to the ships side-a little artistry:

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The block set down on the bedplate with the new crankshaft:

P4.jpg
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Re: Why Would We Do This?

Postby The Dieselduck » Wed Dec 01, 2010 12:18 pm

Jasus, That's some workout.
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Re: Why Would We Do This?

Postby JK » Wed Dec 01, 2010 12:31 pm

Gave me some grey hairs.
I'll post some more pictures, when I find them, on the rail system out the hull.

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Big Pete
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Re: Why Would We Do This?

Postby Big Pete » Thu Dec 02, 2010 12:53 am

It certainly looks like hard work chainblocking all that around!
Quite a feat of organisation and planning. I can see where the grey hairs came from!
If she was an old steamer that had been re-engined with a diesel engine, I would have thought she was so old that she would have been beyond economic repair when the crankshaft was destroyed.
What happened to the crankshaft by the way? There was probably a story behind that as well.

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Re: Why Would We Do This?

Postby JK » Thu Dec 02, 2010 2:11 am

The ships is aged, but the cost of replacing her is high. She'll be around after I am retired.
It is a MaK 16M453. The fuel pumps are designed for burning HFO and DFO and there are several different punch marks in the interior for alignment.
The pumps were rebuilt and the wrong punch used for alignment on 15 of the pumps. The pumps were set at 25% fuel at 0 rack. When it was started, it went into overspeed and threw a counterweight through the base and the crank was bent.
The oiler who was in the area when it was started, crawled under the deckplates to shut the fuel off. The engine could not be shut off by the controls or tripped locally. The counterweights are bolted on, when the torsional stress became too great the bolts failed. The Chief reported that he could feel the vibration in his cabin 4 decks up from the engine.
I went down 12 hours later after an extensive cleanup effort by the crew and oil was still rolling out of crevices everywhere. Everyone was very shaken, to say the least.
I will post more pictures as I get the chance.

And the chainfalls-LOL, I am so glad it wasn't me! The laborers labored very hard! As you know, a lot of pulling on the chain only lifts the hook a few inches and they were big chainfalls! They worked 6, 12 hour, days a week for 13 weeks, to strip the engine, move things in and out and rebuild the engine. The engine mfr rep retired not soon after with health issues. I have always believed that this job just about did him in.

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Re: Why Would We Do This?

Postby Big Pete » Thu Dec 02, 2010 6:25 am

The fuel pump markings sound dangerous, an accident waiting to happen.
The Oiler was very brave and competent to shut the fuel valve off, the only way it could be stopped in that situation, I hope he was rewarded, if he hadn't done what he did the damage could have been far worse.
The old "Pully Haully" method of hoisting big lumps like that has largely been supplanted with power hoists, which is progress, but also reflects high labour costs and reducewd workforces everywhere. Few unskilled jobs like that left now.

BP
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Re: Why Would We Do This?

Postby JK » Thu Dec 02, 2010 1:04 pm

It was incredibly brave what the two men did in that engineroom, one tried to shut it down locally and the other shut the FO off. The engine and directly coupled generator would have disintegrated in a rather dramatic fashion without their coolness. They both were recognized for their actions.
The Contractor who did the job had 6 fitters and they did everything from chainfalls to reaming.

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Re: Why Would We Do This?

Postby JK » Fri Dec 03, 2010 9:00 am

A couple of more:

Looking down into the engineroom along the railings:

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Support at the engineroom bulkhead. The rails lay on the hull on the outboard end and were braketed:

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The damaged bedplate being chainfalled out:

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The new crankshaft going in. The bracket is bolted to the crankshaft at the web, where the counterweight is fitted. By the persons hand you can see the machine rollers which was fitted under both the brackets and the bedplate to make things smoother.

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Re: Why Would We Do This?

Postby JK » Fri Dec 03, 2010 9:06 am

The remnants of the counterweight bolts and pins. One bolt failed due to the torsoinal stess and the second twisted off:

bolt.jpg
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Re: Why Would We Do This?

Postby offshoresnipe » Sat Dec 04, 2010 1:49 pm

JK,
Thanks for the post, great pictures and information.


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