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Steam Stationary Engines, Traction Engines, Steam Boats

Rebuilding Marsh Steam Pump


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  #1  
Old 06-13-2018, 10:52:04 AM
Sid Pileski Sid Pileski is offline
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Default Rebuilding Marsh Steam Pump

Good morning All.
I've been a long time lurker. I've been involved in steam and IC engines for a long time, mainly model building.
I'm currently working on a Marsh simplex steam pump for a friend. It worked when I got it (at lease it moved on air, I don't know yet about the pump side).
Taking it apart to clean and inspect it, I saw that the rings were stuck. I tried for some time to free them,but no luck. I eventually had to break them out.
So, now I need a set of rings.
The bore is 2.50, the ring cross section is .125 x .125. Who/where might be the best option to find a set of the shelf (with a lot of luck) of the best place to get them made for a reasonable cost and time frame?

Thanks in advance for any help.

Sid
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Old 06-13-2018, 11:18:56 AM
GreasyIron GreasyIron is offline
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Default Re: Rebuilding marsh steam pump

I'm not certain whether either will have exactly what you need, but a couple places to call:

Flywheel Supply

Hit N Miss Enterprises

Good luck with your pump! And welcome to SmokStak!
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Old 06-13-2018, 11:30:16 AM
Sid Pileski Sid Pileski is offline
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Default Re: Rebuilding marsh steam pump

Thank you. I'll look into both of these.

Sid
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Old 06-13-2018, 11:49:27 AM
Glenn Gieszler Glenn Gieszler is offline
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Default Re: Rebuilding marsh steam pump

Purely out of curiosity are the rings truly .125 all the way around
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Old 06-13-2018, 12:59:34 PM
Sid Pileski Sid Pileski is offline
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Default Re: Rebuilding marsh steam pump

Quote:
Originally Posted by Glenn Gieszler View Post
Purely out of curiosity are the rings truly .125 all the way around
No! As a matter of fact! I did notice that they taper like the drawing.
They are definitely not .25 wide like the drawing.
So, please educate me, why are they like that?
Where did you happen to come across that drawing?
While I'm at, I've been truing to identify this pump and approximate year.

Sid
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Old 06-13-2018, 02:35:57 PM
Glenn Gieszler Glenn Gieszler is offline
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Default Re: Rebuilding marsh steam pump

While I am not an expert on marsh pumps, I have a bunch too rebuild, at one time I contacted American marsh pumps as they are still in business but now located in Tennessee, they were very helpful and stated that when they bought the company they sold the steam pump division off and gave me their contact info, however when contacting them they were like talking to a coffee table and I got no where and they gave the appearance that they did not care about representing that style of pump anymore, in any case I believe the drawings and possible patterns may still exist. The drawing given came from JI case drawings to help identify your pump casting numbers or pictures always helps, thankfully you can still down load the patents that was associated with the pump and in the description it explains the reasons for resistance within the pump to control the action of the pump without the additional use of a governor controlling the RPM of the pump
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Old 06-13-2018, 03:00:03 PM
Joe K Joe K is offline
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Default Re: Rebuilding marsh steam pump

Quote:
Originally Posted by Sid Pileski View Post
No! As a matter of fact! I did notice that they taper like the drawing.
They are definitely not .25 wide like the drawing.
So, please educate me, why are they like that?
Where did you happen to come across that drawing?
While I'm at, I've been truing to identify this pump and approximate year.

Sid
Can't help you with the pump or year, but rings were made "tapered" in an attempt to create a uniform pressure radially.

Split at one place, rings tend to have their greatest pressure at the split, the point opposite the split having NO pressure against the sidewalls. If tapered, one makes a circular cantilever beam which tends to "even out" the radial pressure.

Halsey's Handbook (McGraw-Hill 1916) gives suggestions for proper construction of "tapered" rings. (p.431) The technique involves removing the segment, compressing the ring, machining to size, and then releasing the ring to expand BEYOND the actual size. Thus a ring is formed which when re-compressed to the proper diameter, assumes a circle and presents uniform radial pressure.

Hope this helps. See https://archive.org/details/handbookformachi00halsrich for online.

Joe K
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Old 06-13-2018, 03:47:14 PM
Sid Pileski Sid Pileski is offline
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Default Re: Rebuilding marsh steam pump

That makes sense. I probably won't bother trying to find that type of ring.
And will consider myself lucky to find a "standard" ring of the correct diameter and cross sectional dimensions.

Sid

---------- Post added at 03:41:42 PM ---------- Previous post was at 03:38:15 PM ----------

Thanks. That makes sense.
I probably will not worry about trying to find a ring of that configuration, and consider myself lucky to find the right diameter and cross sectional shape.

Sid

---------- Post added at 03:47:14 PM ---------- Previous post was at 03:41:42 PM ----------

Thanks.
That makes sense. I probably won't worry about trying to find a ring of that style. I'll consider myself lucky to find the right size and cross sectional dimensions.

Sid
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Old 06-13-2018, 10:58:26 PM
halcon halcon is offline
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Default Re: Rebuilding marsh steam pump

Small piston rings such as those were used in automatic and power shift transmissions. I have seen them in open stock in some of those shops years a go. It might be a good place to start looking.
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Old 06-14-2018, 11:58:30 AM
Sid Pileski Sid Pileski is offline
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Default Re: Rebuilding Marsh Steam Pump

I was able to get a set from Dave Reed @ Otto.
He had them in stock and is sending out.

Now I just have to get the water pump side leather cups made.
I made one a couple of weeks ago that turned out well. If I could find a source for them, that would save some time too.

Anyone know a good source for those? The diameter is 1.437.
Couldn't be a nice number like 1.375 or 1.5!!

Thanks for all the help!

Sid
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