Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

My wife collects engines and attachments for the last 40  years or so.  She recently came across two Marklin engines.  A 4150 -91-D9 and  a 4160-91-D9.

I usually clean them up for her.  My approach is to basically leave them alone except for a good cleaning.  I make minor repairs to get them going.  She likes them in as found condition. 
I have a request on both of these if possible.  Does anyone have a link to or a source for the instructions?  I have done some searches but seem to come up blank.  I am guessing there must be Marklin sites in Europe but have not been able to find them.
The 4160 turns over nicely with a quick test so I set it aside its cleaning. 
The 4150 on the other hand turns over fine by hand, no binding.  However when air is applied it will not turnover and run. ( the underlined is a clarification edit). I also have not been able to check the dynamo.  The 4150 has a slip eccentric implying it should run in either direction.  When I apply air through the oiler it will flip the crank to top dead center and stop.  I have tried forcing it around but it just does the same, either direction.  When trying to turn it there is pressure trying to stop me from turning it.  It is almost as if the air is going into both sides of the piston at the same time.  I have a 2” scale Case Traction Engine that after 35 years of running had a really leaky valve and starting it was difficult since steam leaked into both sides.  I would get steam coming out of both cylinder cocks at the same time.    I am wondering if something like that is happening or if the eccentric has slipped somehow. 
Any thoughts on this would be appreciated, especially would like to hear from someone who has one of these.
Attached are some photos, the boiler is 3 1/2 “ x 10” on both of them, the height to the stack as about 22”. 
Bob


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Hi Bob, Nice to see you here.

First... WELCOME ABOARD...!!!

Both your Marklins have brass pistons and brass cylinders so getting the unstuck is usually requiring just penetrating oil and letting them soak it in for a week or two. Be sure to check the slide valve for freedom of movement as well. I once had a Jensen with a piston that freed in a couple days while the valve took an extra week. There are solvents that might free it quicker however you want to be careful to avoid solvent on your good original paint.

Best of luck with these. Your bride has acquired a couple of nice treasures.

Are you going to Cabin Fever?

Gil

Stoker, Gil, Maxwell

First, thank you for the responses and suggestions.

Second, unfortunately I was not clear in my description of the problem.  I changed  my message and underlined the changed context.  That first sentence describing the problem should have read:


The 4150 on the other hand turns over fine by hand, no binding.  However when air is applied it will not turnover and run. ( the underlined is a clarification edit).

Then the rest of the description of how it locks up will make more sense.

Bob

Gil

It has been awhile since I posted here.  No will not be at Cabin Fever getting to be a long drive and Gen just had a knee replacement and she lasts about an hour in car before needing to walk around for about 20 minutes.

I do have a posting question, when I added the pictures I made the first one a full size, all the rest I I clicked on the expandable thumbnail.  The post ended up with all of them large size.  I did not want to take up all that space, what did I do wrong for future posts.

Bob

Nice engines - wish I had'em!

If you ever want to part with one...

I'm with Michael.  That obnoxious looking 'thing' on top of
the oiler pot needs to go and something else put in its place.

Good Luck,
Wayne

Gil

It has been awhile since I posted here.  No will not be at Cabin Fever getting to be a long drive and Gen just had a knee replacement and she lasts about an hour in car before needing to walk around for about 20 minutes.

I do have a posting question, when I added the pictures I made the first one a full size, all the rest I I clicked on the expandable thumbnail.  The post ended up with all of them large size.  I did not want to take up all that space, what did I do wrong for future posts.

Bob

.....
Hi Bob, Your pictures are all of a very decent size. Most of them are around 115 kb and I only saw one just under 180 kb.

Please feel free to post all you want in these sizes without there being a space issue. We accept photos up to 5 MB. It is not required but if you do ever load photos approaching 5 MB, as a courtesy to those with slower connections, a thumbnail is good. This way the viewer can choose if he or she wants to load them. Again, yours are all of a fine size for easy viewing on our boards.

I really appreciate your courtesy and I pray that Gen has a speedy healing with her knew knees.
Please pass along to her my best and kindest regards.


Gil

I think Brent is right. It even looks messed up. High point on the eccentric should be 90 degrees off the crank arm in either direction.

Also check that the eccentric isn't just sticking between the directional stops. That could easily mess it up.

The eccentric can not be adjusted against the crank - it is lets say compulsion controlled.
- ergo - if the eccentric moves freely - it has to work
Arnold