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Author Topic: 1948 Mamod minor II (restoration process)  (Read 111 times)

St Paul Steam

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1948 Mamod minor II (restoration process)
« on: May 12, 2022, 03:11:48 pm »
Hi folks, just finished restoring my 1948 Mamod Minor II with an abundance of help from "Alan UK"  I needed to fabricate a cylinder assembly, safety valve & 2 wick burner, Alan helped me with the dimensions on all those items & I knocked them out to what you see here. it came together very well & started running at 8 psi & is now down to around 3 psi before stalling, for a single acting cylinder I am happy with that.
As recieved
https://youtu.be/dNLjFJbO1Yk







https://youtu.be/aWQNLSrK6Pc

finished plant

https://youtu.be/GRiv_mB4Yjs
Bruce
St. Paul Indiana , USA

txlabman

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Re: 1948 Mamod minor II (restoration process)
« Reply #1 on: May 12, 2022, 03:40:28 pm »
Well done Bruce.

It looks better than new.

I look forward to seeing the painted burner in Mamod Green.

Kudos to Alan for his assistance.

Woe is me

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Re: 1948 Mamod minor II (restoration process)
« Reply #2 on: May 12, 2022, 04:25:45 pm »
Nice job Bruce, that really does look, oh oh oh look over there, to the left.
I see a chicken and a chicken, chicken, chicken. He's got the whole flock in
there. Good for you.
"Steam it, like you mean it."        Tommy.

St Paul Steam

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Re: 1948 Mamod minor II (restoration process)
« Reply #3 on: May 12, 2022, 09:20:57 pm »
Thanks Charlie & Tommy, I've had this bare bones plant since last November and have entirely to many labor hours in it to sell it on ,so it'll just sit on a shelf for years until I forget how many hrs (18) I have into it's restoration... Lol. I'm just happy to have saved it.
Bruce
St. Paul Indiana , USA

ShadetreeMotorcycle

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Re: 1948 Mamod minor II (restoration process)
« Reply #4 on: May 13, 2022, 06:25:46 am »
Hello Bruce, I enjoyed this thread a bunch. I myself would have a hard time covering that attractive self made Meths burner with paint, but I also understand the desire to make like original.

In the video you spoke of lining the firehouse with a heat resistant material to help save the paint, I was wondering if you could elaborate on that a little? Things like how you secure in place or what the material is or possibly a link to purchase?
Thanks for making such high quality posts!

tenniV11

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Re: 1948 Mamod minor II (restoration process)
« Reply #5 on: May 13, 2022, 08:03:55 am »
Great job, it is always good to see - that other members
also help to prevent these old engines.
Congrats, Arnold  :D

St Paul Steam

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Re: 1948 Mamod minor II (restoration process)
« Reply #6 on: May 13, 2022, 01:25:35 pm »
Hello Bruce, I enjoyed this thread a bunch. I myself would have a hard time covering that attractive self made Meths burner with paint, but I also understand the desire to make like original.

In the video you spoke of lining the firehouse with a heat resistant material to help save the paint, I was wondering if you could elaborate on that a little? Things like how you secure in place or what the material is or possibly a link to purchase?
Thanks for making such high quality posts!
the flame resistant material is 1/8" flame resistant sheet that can be bought nearly anywhere , the stuff I used probably came from China as I bought it years ago, I cut the 2 vent holes on either side a little large as to not be seen & with the 1/2' band that holds the boiler secure on this particular model I simply tucked the heat shied between the band & firebox which worked nicely....that was it.
Bruce
St. Paul Indiana , USA

ShadetreeMotorcycle

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Re: 1948 Mamod minor II (restoration process)
« Reply #7 on: May 13, 2022, 05:09:38 pm »
Sounds easy enough, thanks for the info!

IndianaRog

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Re: 1948 Mamod minor II (restoration process)
« Reply #8 on: May 13, 2022, 07:36:11 pm »
It may have been a lot of hours Bruce, but you did it proud!

Rog
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St Paul Steam

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Re: 1948 Mamod minor II (restoration process)
« Reply #9 on: May 13, 2022, 08:11:48 pm »
Finished , painted burner and logo's

https://youtu.be/9tQ22OBy1aE

running Baker fan

https://youtu.be/8Wn42lmB-1U

One for Tommy 😄👍

https://youtu.be/UWzleU-aCsY
Bruce
St. Paul Indiana , USA

St Paul Steam

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Re: 1948 Mamod minor II (restoration process)
« Reply #10 on: May 13, 2022, 08:17:45 pm »
It may have been a lot of hours Bruce, but you did it proud!

Rog
Thanks Rog , I don't think I've ever tackled making a complete piston & cylinder assembly from scratch before , so that was a challenge for me and with Alans good technical specifications it was much easier.
Bruce
St. Paul Indiana , USA

classixs

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Re: 1948 Mamod minor II (restoration process)
« Reply #11 on: May 14, 2022, 12:57:51 am »
It came out great, very well done Bruce!

How did you make the steamchest on the cylinder...
Did you drill and split a solid block of brass, or did you happen to have a fitting ball nose end mill?
Cheers
Jan
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St Paul Steam

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Re: 1948 Mamod minor II (restoration process)
« Reply #12 on: May 14, 2022, 06:36:29 am »
It came out great, very well done Bruce!

How did you make the steamchest on the cylinder...
Did you drill and split a solid block of brass, or did you happen to have a fitting ball nose end mill?
I do have several ball nose end mill bits , none were a perfect diameter for the cylinder , so I used a slightly undersized bit & "crept" up on the cradle fit. I made it just a little loose to compensate for the solder fill , I got lucky because it worked well . I had made 2 cylinder cradles, but only needed the 1st one. the pivot post is threaded into the cradle & the whole thing (cylinder & all) was soldered together at one time. the cylinder is one piece Brass. the piston connecting rod is threaded into the piston , so I had about 1/8" adjustment to fine tune the fit for optimum running. the piston was such a tight fit that although it would go into the bore ....I couldn't get it in very far , I hadn't drill the steam port into the rear of the cylinder & it was compressing air when I tried to push in & it would just pop right back out, until I drilled the steam port...lol.
Bruce
St. Paul Indiana , USA

 

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