The Unofficial Mamod and Other Steam Forum

davejw · Posted: Fri Dec 23, 2011 3:21 pm Post subject: M122 end cap problem

I bought an M122 recently and although in very good condition overall
I knew there was a problem with the end cap because of the amount of solder attached.
I have removed the solder, (great tip using wire wool with flux on it)
and it's revealed what looks like an old overflow hole.
There is no sign of any corrosion although it is slightly dinged
There is a something loose inside the boiler, might be the old collar.
I am not sure of what to do next. Any idea's. Fit a plug ? A bottom overflow ? A new end ?
I would appreciate your comment's. Attached some photographs.

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DaveJW

Stitch1615 · Posted: Fri Dec 23, 2011 3:25 pm Post subject:

Obviously a new end cap for an absolute restore,
but then a blow down valve might be nice.
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Stitch

Hot Tip: Never kick a fresh turd on a hot day.

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Les · Posted: Fri Dec 23, 2011 4:16 pm Post subject:

If you have the confidence to take the endcap off you could then either fit another plug or solder a piece on the inside off the endcap to seal it.
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Les - Don't panic - it's your round next.

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Atticman · Posted: Fri Dec 23, 2011 4:48 pm Post subject:

I suspect someone fitted something to refil via a pump while steaming at sometime.

Advice as above- you can either resite a water pump or restore/ make a new endcap
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You cant get an engine for that anymore unless you are lucky

Steve_S · Posted: Sat Dec 24, 2011 12:29 am Post subject:

I think I'd make a new endcap for it if it were mine. While the endcap is off the boiler you can clean it out and remove any scale or other bits and pieces that might be in there.

Mamodman123 · Posted: Sat Dec 24, 2011 12:05 pm Post subject:

Steam Models · Posted: Sat Dec 24, 2011 4:01 pm Post subject:

Which ever way you go you'll need to remove the endcap.

If you want to use the hole for a new ferrule, (blow down valve or a water feed) then fine.

But if you don't.

Then don't play with it, make a new endcap.
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Cheers,
Les

Atticman · Posted: Mon Dec 26, 2011 8:02 am Post subject:

There are options though, a small disc of brass with a smaller area that size machined on a lathe then soldered in with the endcap off wouldnt look too bad and be a talking point

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You cant get an engine for that anymore unless you are lucky

davejw · Posted: Mon Dec 26, 2011 8:43 am Post subject: M122 end cap problem

Thank you very much for your replies.
I have a friend who will make me hardwood formers and, following a thread on the forum, I feel fairly confidant that I can make a new end.
If I am not happy with the result I know that I can solder a new insert in place and fit a plug in the existing end cap.
Can any let me know the thickness of brass I need ( I have seen 0.016" ) and the best place to buy it.
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DaveJW

Steam Models · Posted: Mon Dec 26, 2011 2:27 pm Post subject:

Quote
"Can any let me know the thickness of brass I need"

Easy ... about 20% thicker than the brass of the boiler barrel.
If you have a mic, simply measure what it is.
At a guess you will need .8 mm (but could be wrong, as it might be as thin as .6 mm)

As for buying the brass, I don't know where you live.
But if I were you I would try to buy it locally first,
either from a plumber or a Plumbers Supply House or an outlet suppling non Ferrous Products.

If you haven't made an endcap before you will be surprised at just how easy it really is.

Good luck with everything,
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Cheers,
Les

davejw · Posted: Sun Mar 11, 2012 10:40 am Post subject: M122 end cap problem

It's been a while since I started the thread, but holidays and a bout of 'flu have delayed things.
However, I took the forums advice and replaced the end cap.
A friend turned me some formers but then a met someone who turned me one on his lathe, the formers might come in use sometime.
As a complete novice,the thoughts of ruining the boiler made me very nervous but I need not have been because by following the threads on the forum the job went very well.
The only snag was that I damaged the end cap by tearing it slightly on the rim when I was removing it. I did not know how thin Bowmans boilers are !! It was not going back, so it did not matter
I used a slice of one of the formers to make a template to correctly position overflow hole on the new cap which was very handy.
I also tinned inside the new cap to ensure a steam proof seal, then fitted the over flow plug.
I have added some photographs of the old and new end cap and template, plus the end cap in place and, of course the finished job
I just need to make some oilers, again I will follow the threads
Thanks again to the forum for all the great advice

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DaveJW

MrDuck · Posted: Sun Mar 11, 2012 11:10 am Post subject:

Very nice resto

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Et in Arcadia Ego

flywheel61 · Posted: Sun Mar 11, 2012 11:12 am Post subject:

That turned out really nicely, in a couple of years you won't know that it's been replaced, well done. It's great having friends who can help/do things for you.

Cheers

Chris

Les · Posted: Sun Mar 11, 2012 5:24 pm Post subject:

Steve_S · Posted: Sun Mar 11, 2012 10:23 pm Post subject:

You've done a great job there. Well done!

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