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GWR 2-8-0 2857
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hearn_p



Joined: 15 Nov 2003
Posts: 5849

PostPosted: Thu Apr 07, 2016 10:21 am    Post subject: Reply with quote

Ivan Whitehouse on Unofficial Facebook (and so closed) has posted an image of changing the steam heating pipe on 2857 on 6.4.2016 due to a fractured casting

Patrick
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xpc smooth



Joined: 22 Jun 2007
Posts: 323
Location: in front of a computer...obviously

PostPosted: Tue Apr 12, 2016 8:51 pm    Post subject: Reply with quote

sharpo wrote:
I noticed a strange noise from 2857 today when I saw it at Arley, sounded like flats on a tender wheel?

Just watched my video and the noise can be heard.


You are quite right, Sharpo. 2857's tender has a wheel flat, caused by the handbrake being left on for an indeterminate time ten days or so ago. I had it all last week and it did seem to be working its way out by the end of the week.

The engine performed superbly last week.

Regards,

John
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xpc smooth



Joined: 22 Jun 2007
Posts: 323
Location: in front of a computer...obviously

PostPosted: Tue Apr 12, 2016 8:56 pm    Post subject: Reply with quote

hearn_p wrote:
Ivan Whitehouse on Unofficial Facebook (and so closed) has posted an image of changing the steam heating pipe on 2857 on 6.4.2016 due to a fractured casting

Patrick


Ivan was with us on Wednesday. The steam heat bag blew as we were coming into Highley, so we shut it off and I arranged to phone forwards, via the Highley signalman.

A Bridgnorth fitter replaced the bag on arrival at Bridgnorth. The casting had fractured.

By the by, Ivan fired a double trip on the 28 - not bad for a 74 - year old!

And he didn't break sweat.

Regards,

John
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Graham



Joined: 21 May 2011
Posts: 1119
Location: The banks of the River Severn as it meanders through the sun dappled leafy glades of Worcestershire

PostPosted: Tue Apr 12, 2016 10:02 pm    Post subject: Reply with quote

Regarding the wheel flat, I've been told that the brake wasn't on hard enough to lock the wheels, so it wasn't actually a flat spot on the tyres.
however, the brake was on enough to heat at least one shoe to the point where it was starting to friction weld itself to the wheel, so the noise was these lumps of metal going round.
I don't know if they were ground off or just left to wear away naturally.
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Graham Phillips
Acting deputy assistant junior under minion, Bewdley Wagon Department.
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sharpo



Joined: 19 Feb 2006
Posts: 3711
Location: Dark Side

PostPosted: Thu Apr 14, 2016 8:01 pm    Post subject: Reply with quote

xpc smooth wrote:
sharpo wrote:
I noticed a strange noise from 2857 today when I saw it at Arley, sounded like flats on a tender wheel?

Just watched my video and the noise can be heard.


You are quite right, Sharpo. 2857's tender has a wheel flat, caused by the handbrake being left on for an indeterminate time ten days or so ago. I had it all last week and it did seem to be working its way out by the end of the week.

The engine performed superbly last week.

Regards,

John

Thanks for that reply, John. I was beginning to think I was imagining noises. The noise can be heard on this video:-

https://youtu.be/vIYswvlfOSA
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Sharpo (happily avoiding fakebook & twitter)

Check the blog for all the latest sightings, photos or videos:-
http://www.sharpos-world.co.uk/blog/

Or links from calendar -
http://www.sharpos-world.co.uk/blog/?page_id=5050
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hearn_p



Joined: 15 Nov 2003
Posts: 5849

PostPosted: Fri May 27, 2016 11:11 am    Post subject: Reply with quote

SVR website shows a Class 20 on the AN1 first departure today vice 2857

Patrick
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cherry_p



Joined: 17 Sep 2003
Posts: 1976
Location: Solihull

PostPosted: Fri May 27, 2016 2:29 pm    Post subject: Reply with quote

hearn_p wrote:
SVR website shows a Class 20 on the AN1 first departure today vice 2857

Patrick
yes - broken tender spring; 4566 on AN1 second departure.
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threelinkdave



Joined: 22 Dec 2010
Posts: 702
Location: Stratford-upon-Avon

PostPosted: Fri May 27, 2016 10:07 pm    Post subject: Reply with quote

The discovery of the broken spring caused much delay. A class 20 was already scheduled for AS2 so a second 20 was run up and a driver found. AS1 start was delayed for 30 mins to allow the light engine to reackh Bridgnorth and furthur time dropped during journey waiting for other trains.

AN1 second run was as stated 4566 but the 20 stayed attached on the rear so as to return it to Kidderminster.
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oliver



Joined: 26 Mar 2007
Posts: 911
Location: Bridgnorth

PostPosted: Sun Jan 08, 2017 12:14 pm    Post subject: Reply with quote

Quite a lot of work is planned for 2857 over the next few weeks/months. In addition to mechanical work, the loco is to receive a partial re-paint. Yesterday, the loco and tender were split in readiness for entry into the paint shop. The tender is to receive a patch up and re-varnish along with the cab sides, and the boiler barrel will get a full repaint.
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hearn_p



Joined: 15 Nov 2003
Posts: 5849

PostPosted: Sun Jan 08, 2017 12:49 pm    Post subject: Reply with quote

Thank you, 2857 is one of the locos where not much info is put out to the public. Do you know what are the planned mechanical works?

Patrick
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oliver



Joined: 26 Mar 2007
Posts: 911
Location: Bridgnorth

PostPosted: Sun Jan 08, 2017 9:43 pm    Post subject: Reply with quote

Can't remember specifically what this work involves now, but I will let you know if I find out when I am down next.
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Graham



Joined: 21 May 2011
Posts: 1119
Location: The banks of the River Severn as it meanders through the sun dappled leafy glades of Worcestershire

PostPosted: Sat Jan 14, 2017 7:21 pm    Post subject: Reply with quote

From the 2857 Society chairman,
2857 will be having its cylinders bored out and liners fitted to take it back to standard size. This will be the first time in preservation it has run with standard sized pistons and cylinders.
The X on the cab sides denotes it as being higher powered than the standard E power rating. This was, in part at least, due to the larger cylinders.
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Graham Phillips
Acting deputy assistant junior under minion, Bewdley Wagon Department.
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cherry_p



Joined: 17 Sep 2003
Posts: 1976
Location: Solihull

PostPosted: Sun Nov 12, 2017 4:39 pm    Post subject: Reply with quote

Interesting video posted on Facebook today of 2857's cylinder re-bore.

On the "Unofficial Severn Valley Railway Facebook group"

https://www.facebook.com/groups/2360466988/?multi_permalinks=10155087154371989&notif_id=1510501051880374&notif_t=group_activity
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madderlake



Joined: 22 Jul 2007
Posts: 311
Location: Bridgnorth

PostPosted: Fri Mar 23, 2018 11:17 am    Post subject: Reply with quote

The cylinder liners were shrink-fitted on Thursday.

This is always a day of considerable bustle and excitement as it is an extremely time-critical process. The liner is a cast iron tube, a few thousandths of an inch larger in diameter than the size that the cylinder has been bored out to. It has to be dunked in a bath of liquid nitrogen and then shoved home in the cylinder bore. Once the liner is touching the bore of the cylinder, there are only seconds available before the liner takes up enough heat to lock in place, or, of you are unlucky, not in the right place. As well as pushing it home against the back cover, it has to end up with the correct angular alignment of the port cut-outs. You don't get a second chance and if it goes wrong the liner will be scrapped in the process of getting it out again.

If I understood correctly, it is the first time the SVR has fitted liners as big as these, and the preparations were greater than I have seen before. These included the construction of an insulated rectangular steel bath big enough to immerse the liner, a new pair of guide bars to be fitted to the front flange of the cylinder, each equipped with a line of rollers, and a quickly removable lifting device for use with a fork-lift in crane mode.

So the fork-lift is positioned facing the side of the engine, between the cylinder and the front buffer beam, and with the liner suspended from a hook at each end, lined up as well as possible. The nitrogen bath is trundled into place below the liner, which is lowered into the bath. When deemed cold, the liner is lifted out, and the bath pulled out of the the way. The fork truck moves in and lowers the liner, white with CO2 frost, onto the guide bars, the liner is unhooked, alignment checked, and pushed down the bore. Everyone says "phew" and then sets up to do the other side. Actually, I didn't watch, as this is the kind of job where an audience does not assist.
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Danny252



Joined: 01 Oct 2009
Posts: 1198

PostPosted: Tue Mar 27, 2018 11:00 am    Post subject: Reply with quote

How was the fitting of liners done "back in the day"? Whilst liquid Nitrogen might have been available in industrial quantities during the later part of the steam era, I find it hard to believe that such methods would have been achievable for much of the 19th century.

Of course, part of the explanation may be that cylinder liners only came into use once this method could be used!
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