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Author Topic: Marklin sight glass help.  (Read 1253 times)

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Marklin sight glass help.
« on: April 24, 2021, 06:36:52 pm »
I'm cleaning up a Marklin 4112/ 10 with tile base to run and was resealing the sight glass. I have 7mm glass tube but this is smaller and tin walled tube. I think it's the original. My 7mm tube is too big and 6mm is too small. The fittings are the original Marklin square blocks with the weird little inserts. I of course I broke the old glass.
Has anybody run across this glass size ? I've done Marklin sight glasses before but haven't run into this glass size. Thanks for any help.
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Cheers Bob, I collect mostly German steam stationary engines.

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Re: Marklin sight glass help.
« Reply #1 on: April 25, 2021, 05:46:26 pm »
 I think I have this sorted or on the way. The right size glass is the key. I have replaced these sight glasses a few times but this engine is older and the sight glass is just a little smaller in diameter @ 6.35 mm and thin walled so none of my glass stock would work. I'll post my fix when it happens. 
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Cheers Bob, I collect mostly German steam stationary engines.

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Re: Marklin sight glass help.
« Reply #2 on: April 26, 2021, 06:36:52 pm »
Great news on sorting this out.

Looking forward to seeing your handiwork.
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Re: Marklin sight glass help.
« Reply #3 on: April 29, 2021, 08:10:24 pm »
Well I got some glass tube today from North Carolina and while it was better it wasn't a perfect fit. Ideally you want to be able to drop the sight glass down from the top passing through the block fitting that holds it, but it was just a little too big in diameter. I had to slip it in while tightening the fittings. The sight glass goes in bottom fitting before it's completely tight then turn the fittings together to get it to slip into the top. If that makes sense ?
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I tried to post a photo but didn't have any luck..... I'll figure it out later.
 
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Cheers Bob, I collect mostly German steam stationary engines.

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Re: Marklin sight glass help.
« Reply #4 on: April 30, 2021, 12:36:58 pm »
Make sense to me.  Were you able to put a gasket on each end on the outside of the sight glass inside the fitting?
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Re: Marklin sight glass help.
« Reply #5 on: April 30, 2021, 03:49:53 pm »
Quote from: txlabman on April 30, 2021, 12:36:58 pm
Make sense to me.  Were you able to put a gasket on each end on the outside of the sight glass inside the fitting?


I put an O Ring in the top fitting otherwise that little nipple thing that centers the sight glass would be just floating loose. I just used high temp silicone on the bottom. I think the old glass was original and it looked like it was sealed with some kind of caulking ? I'll try to post a video.

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Cheers Bob, I collect mostly German steam stationary engines.

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Re: Marklin sight glass help.
« Reply #6 on: April 30, 2021, 04:19:03 pm »
  Heres another video of the little Marklin and me talking to myself.

 
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Cheers Bob, I collect mostly German steam stationary engines.

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Re: Marklin sight glass help.
« Reply #7 on: April 30, 2021, 05:38:44 pm »
I found that 7 mm, while slightly larger than the original, could be fit after doing a real good clean out of residue on the site glass parts.
Bob, my Marklins may have been a little newer than yours.
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Re: Marklin sight glass help.
« Reply #8 on: April 30, 2021, 06:36:13 pm »
Quote from: RedRyder on April 30, 2021, 05:38:44 pm
I found that 7 mm, while slightly larger than the original, could be fit after doing a real good clean out of residue on the site glass parts.
Bob, my Marklins may have been a little newer than yours.


 Hi Gil, I never had this problem before that I recall ? When I ordered glass I bought two different brands thinking one might be a little smaller. I ordered 1mm standard wall thickness which helped as my older glass tube must have had a thicker wall, 1.5mm ? 
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Re: Marklin sight glass help.
« Reply #9 on: April 30, 2021, 06:46:34 pm »
Quote from: Earlytimes on April 30, 2021, 04:19:03 pm
  Heres another video of the little Marklin and me talking to myself.

 

Oh my.  What a beautiful engine. 

Thanks for posting the video and it is great to see no leaks in the sight glass.
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Re: Marklin sight glass help.
« Reply #10 on: April 30, 2021, 06:58:52 pm »
"Oh my.  What a beautiful engine. 

Thanks for posting the video and it is great to see no leaks in the sight glass." 

  Thanks Charlie,  :) I made the last glass by just going slow and fitting it as I went.
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Cheers Bob, I collect mostly German steam stationary engines.

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Re: Marklin sight glass help.
« Reply #11 on: April 30, 2021, 07:13:13 pm »
Quote from: Earlytimes on April 30, 2021, 06:58:52 pm
"Oh my.  What a beautiful engine. 

Thanks for posting the video and it is great to see no leaks in the sight glass." 

  Thanks Charlie,  :) I made the last glass by just going slow and fitting it as I went.

You did a great job!

I love patterned base engines and this one is at the top of the list.

It was great to see it running.

Thanks!
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