Dan's Rob roy rebuild

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Dan's Rob roy rebuild

Post by DLRdan » Thu Jun 20, 2013 10:46 pm

Back in Febuary I bought a slightly tired looking 3.5" gauge Rob Roy to Martin Evans popular design. The plan was to run it for a couple of years then repaint it. Unfortunatly thing didn't quite work out so I have decided to go for it. Yesterday afternoon was spent breaking it down into large lumps with a few suprises.

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The chassis as expected is pretty tired, there isnt a huge amount of wear but there is lots of play where things have worked loose or were badly machined to begin with. This is where the problems with the running lie and will be rebuilt fully with new axle boxes for a start.

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Next up is the boiler. Professionaly made to begin with this is still in really good condition if a little mucky. The boiler fittings are not that great so I am going to make or buy new ones along with making a new manifold which will give the option of adding an injector later. Incidentally, if any one knows of a boiler make with the initials TVM i would be interested.

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Finaly are the tanks and body work. I have not looked too closely at these just yet other to confirm a suspicion that the tank insides are infact glued in. There handpump lives in one of these tanks, while working fine it is small for the boiler so intend to replace it with something larger. The running boards have rusted to the point of non return so new ones will be made. On the under side of one though the builder has scratched his name into the paint. If you cant make it out it reads : John Lewis Jones Reed ESQ.          Built between 1977 and 1980 AD.

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Last edited by DLRdan on Fri Jun 21, 2013 11:01 pm, edited 2 times in total.
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Post by sstjc » Thu Jun 20, 2013 10:49 pm

Yes !
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Post by Lner fan Sam » Thu Jun 20, 2013 11:10 pm

I would be as I own a larger scale loco. :D
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Post by Dr. Bond of the DVLR » Fri Jun 21, 2013 11:31 pm

Great looking project on your hands Dan!
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Post by DLRdan » Sat Jun 22, 2013 8:59 pm

Bit more progresss today. removed the wheels and valve gear from the frames from the frames.

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Post by DLRdan » Sun Jun 23, 2013 10:46 pm

Last day of taking things apart today which did have a rather nasty suprise.

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As can be seen below there is a peice missing from one of the ports. This is where one of the steam passage ways was drilled at the wrong angle and broke into the valve face. The plan is to tap the hole and tread a piece of bar into it to make the port the correct length.

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Post by laurence703 » Mon Jun 24, 2013 4:14 pm

ahh! I see what you mean now! yeah that sounds like a good solution :)
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Post by Sir haydn » Mon Jun 24, 2013 4:28 pm

Have you not finished this yet? :lol:

Is the boiler in good condition? Are you going to replace any of the fittings while its in bits?

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Post by LnBmad » Mon Jun 24, 2013 8:18 pm

It's the age old one of measure it a million times and then only drill your steam ways when your 99.9% certain it's right! Good luck!
If it can be made full scale it can be made 16mm

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Post by DLRdan » Mon Jun 24, 2013 8:58 pm

Boiler looks in good condition. It hasnt been used that much, there are still machining marks on the valves. I am planning on replacing the fittings, they are home made and are soft soldered together.
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Post by Lner fan Sam » Tue Jun 25, 2013 5:44 pm

Would love to do a overhaul like this on my electric engine however the last owner built it so it couldn't be took apart... :(
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Post by DLRdan » Wed Jun 26, 2013 12:32 pm

Everything comes apart some how, have you got any pics ?
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Post by DolwyddelanLightRail » Wed Jun 26, 2013 12:42 pm

DLRdan:85223 wrote:Everything comes apart some how, have you got any pics ?
If in doubt, give it a clout! And if that doesn't work you aren't using a big enough hammer :lol:

Hat, coat....

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Post by Lner fan Sam » Wed Jun 26, 2013 7:29 pm

When do you see a loco that has the motion riveted to the wheels? :shock:
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Post by laurence703 » Wed Jun 26, 2013 7:37 pm

Ah well the solution is simple... drill the rivets out and replace with bolts
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Post by DLRdan » Thu Jun 27, 2013 5:17 pm

Progress from the past couple of days. Ive removed the piant from the cab roof, chimney and cleading and plugged the hole in the cylinder. The paint also come so I painted the dome as a test. Today I spent about an hour chipping away at what i think is decorators caulking on the side tank, turns out it wasnt just on the outside. Those with a nervous disposition look way now.



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Post by LnBmad » Thu Jun 27, 2013 5:20 pm

Holy *$!%!!!! What did they do?!? How was this expected to last?!? Dare I dream how much was sucked through the plumbing?!?
If it can be made full scale it can be made 16mm

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Post by williamfj » Thu Jun 27, 2013 5:34 pm

Good heavens! :shock:

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Post by Lner fan Sam » Thu Jun 27, 2013 9:49 pm

Good god man!!! :shock: :shock: :shock:
my first live steam engine build thread:
http://gardenrails.myfreeforum.org/about6685.html

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Post by Sir haydn » Thu Jun 27, 2013 10:08 pm

Do you want some big number '1's for the side tanks?

Seriously though, after the rebuild i think your going to instantly see improvment in running

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