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Oil Field Engines & Related Equipment

Fairbanks Morse ZC oil pumpjack


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  #21  
Old 12-13-2012, 10:28:50 PM
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Default Re: Fairbanks Morse ZC oil pumpjack

You're not the first to think that. I sold a 118 to a customer one time and he didn't pay the bill. I called and ask what was wrong/etc. and he said "this engine isn't even put together right, there's some thing on the side that's not hooked up to anything. Just flops around". I said you've got to be kidding right? and explained what that "thing" was and it's purpose and informed him if payment didn't arrive soon I was going to repossess my engine. Bla bla bla, you get the idea. He paid up.
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  #22  
Old 12-14-2012, 04:31:02 PM
Gold Dredger Guy Gold Dredger Guy is offline
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Default Re: Fairbanks Morse ZC oil pumpjack

The regulator has a "Idle" screw, according to the booklet.
IT shows a spring, which I dont have , but ? is will it be used since these are fixed rpm. Where should it be screwed, closed or half or what.
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  #23  
Old 12-14-2012, 05:07:39 PM
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Default Re: Fairbanks Morse ZC oil pumpjack

This screw is where? The gas regulator or on the fuel mixer/carburetor? If it's on the gas regulator you can set it by putting the gas hose straight down into a bucket of water and then adjusting the spring up or down till the hose quits bubbling at about 5-10". That would be 3-6 oz of pressure or so. Close enough for the oil field.

If this screw is on the back of the carb, screw it shut and pretend it doesn't exist. Far too much trouble to get the gasoline part of that carb to work. Save yourself some real misery.
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  #24  
Old 12-14-2012, 11:28:05 PM
Gold Dredger Guy Gold Dredger Guy is offline
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Default Re: Fairbanks Morse ZC oil pumpjack

Its the slotted head screw that is on the left side of the pic above the 1/2" pipe that the gas hooks to, about the size of a nickel, the book calls it a idle screw?
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  #25  
Old 12-15-2012, 10:01:10 AM
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Default Re: Fairbanks Morse ZC oil pumpjack

OK, on an Impco simply ignore that. That only works on a multi cylider engine with consistent vacuum. A single cylinder pulses so much that screw does nothing. That carb is not the OEM FM (or Bell) carb.

Impco makes a generic carburetor that is grafted onto many different engines after the fact (same thing with magnetos). So you can find features on both that don't apply to your application.
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Last edited by Reed Engine; 12-15-2012 at 10:11:38 AM.
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  #26  
Old 12-17-2012, 07:15:16 PM
Gold Dredger Guy Gold Dredger Guy is offline
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Default Re: Fairbanks Morse ZC oil pumpjack

Quote:
Originally Posted by Reed Engine View Post
That's exactly how it is supposed to look (other than the rust etc).



It's purpose is to move the governor spring in and out on it's toothed lever. You hold the knurled end with your fingers and manipulate it to get the end of the rod (it's cupped) over the end of the spring. Then you can move the spring right (faster) or left (slower). You can do this while the engine is running, the little rod (whatever it's name is?) is to keep the flywheel from rubbing your hand.
Looking at the 2nd pic the spring looks to be tight, but there is about 3/8 to 1/2 inch that does not catch while its not running, My question for tonight is" Which way does the lever move as the engine speeds? Toward the rear or head end of engine. And should I get a slightly shorter spring to make it fit in the cradle?, Haven't really got it sped up yet due to a mount that has to be welded, so after that repair it might be clearer to me.
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  #27  
Old 12-18-2012, 12:01:59 AM
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Default Re: Fairbanks Morse ZC oil pumpjack

You have the correct parts. They may be worn out, maybe not. I'd say the internal governor shaft is bent, I'd go inside the engine and correct it. You want an even amount to travel for the external lever either side of 90 degrees to the engine. When I say correct it I mean bend the shaft till things line up. The shaft I speak of is a goose neck with a ball on the top of it. They are famous for being/getting bent. Just bend it back.


A question to the other forum-ites here, is there any benefit to a discussion like this online or should we go to PM's? Just wondering if this is of no value to the larger percent of the OFE guys. I know some of you guys don't really look at "modern" engines as what this forum is about. You tell me.
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Last edited by Reed Engine; 12-18-2012 at 09:06:43 AM.
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  #28  
Old 12-20-2012, 03:20:07 PM
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Default Re: Fairbanks Morse ZC oil pumpjack

No no- keep it public! I'm learning here!!!
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  #29  
Old 12-22-2012, 10:20:18 PM
Allan Wright Allan Wright is offline
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Default Re: Fairbanks Morse ZC oil pumpjack

I'm voting with dkamp on this one. I am one of those new engine guys.
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  #30  
Old 12-23-2012, 03:16:38 AM
Gold Dredger Guy Gold Dredger Guy is offline
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Default Re: Fairbanks Morse ZC oil pumpjack

So is a 1947 engine considered "NEW" ?,
Also allen Recieved the package today,Thanks again.
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  #31  
Old 12-23-2012, 09:32:21 AM
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Default Re: Fairbanks Morse ZC oil pumpjack

Bells were made by the Yarbrough family out of Bowie Texas during the 80's. I knew them well.
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  #32  
Old 01-04-2013, 09:51:57 PM
Jim Gorter Jim Gorter is offline
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Default Re: Fairbanks Morse ZC oil pumpjack

Dredger Guy, These oilfield engines are not really concidered antique, but they are a big part of oilfield history. They are heavily built, easy to work on, parts and good advice is available, and reliable if rebuilt correctly. Pay good attention to Mr. Reeds advice. He has helped me on several rebuilds and is fair and very informative. Have done a 118, 208, and will begin a 346 soon. Jim.
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  #33  
Old 01-05-2013, 12:12:55 PM
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Default Re: Fairbanks Morse ZC oil pumpjack

When wielding powerful words, file the words "antique" and "classic" under the column "ambuguous" and "relative".

The ZC, albeit not fuel injected, turbocharged, and computer controlled, has an enclosed crankcase, and a closed evaporative cooling system, an integral magneto, and frequently, an air filter. It was built with the intention that someone could set it up in an outdoor environment, start it up, engage it to a constant-duty load and walk away, and give it casual attention at most.

Engines to it's senior, would be usually enclosed within a site-built shanty, monitored constantly, with oil being added to the oilers, water added to cooling systems, and fuel, ignition, valve adjustments being regularly serviced.

Seein's how the earlier generation were very maintenance-dependant, they were frequently larger, and employed to drive several loads simultaniously, while the later generation was made small enough to be installed in larger numbers, on individual sites, and run independantly of eachother. This eliminated lots of linkages and mechanical hardware... it also meant that if a prime mover went down for repairs, the rest would continue operating just fine.

The differences in design, reflect the philosophy, which is a more modern attitude than earlier. The philosophy change is so well included, that the ZC engine can still be seen doing it's intended job in fields all over the US. Still employed after a half-century may make it well-aged, and conversion to electric motors on many sites bring us 'retired' ZCs to enjoy in our lives, but I certainly wouldn't call a newly-retired friend an 'antique'... both the ZC and the 65 year old have lots of good life in 'em, plenty of capacity for additional work, and they're both well-proven.

If it's so old that someone has to babysit it every moment, and so exotic or unique that the parts either were made one-at-a-time, or have to be replaced by handmade units... or it's so valuable to somebody that they're too skittish to fire it up and connect a belt to it, and perhaps even too fussy to bring it out into the daylight for the world to see, then I'd classify it as a 'static display antique', send flowers, visitation is at noon.

If it starts, and it barks, it might be a piece of history, but it's an iron-friend to me... and if it don't start and bark, then I put it in the "Work In Progress" category.
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  #34  
Old 08-30-2015, 07:49:38 PM
n8zl n8zl is offline
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Default Re: Fairbanks Morse ZC oil pumpjack

I am new to this hobby. I recently retired from the gas industry but before I left I was given an old pump jack engine. it is a Bell 16k7. My question is, is the 16k7 the same as a fm118?
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Old 08-30-2015, 08:34:58 PM
Allan Wright Allan Wright is offline
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Default Re: Fairbanks Morse ZC oil pumpjack

Welcome n8zl, this is exactly the same engine as a ZC-118 Fairbanks. I am pretty sure all of the parts will interchange.
Good luck with it.

---------- Post added at 06:34 PM ---------- Previous post was at 06:31 PM ----------

Can you post a picture or two of it?
You have to keep the mega bites down on pictures to get them to upload.
Will it run?
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Old 10-05-2015, 05:51:47 PM
n8zl n8zl is offline
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Default Re: Fairbanks Morse ZC oil pumpjack

Thanks Alan, we are in Fla for the winter so I can't send picture now. I am going to start the rebuild in April so I will post before and after pictures. Right now I think all I need is to clean up the carb, it was run on natural gas but I want to run it on gasoline. I also need new valve springs and the mag cleaned up. Seems like a really nice engine and I am wanting to hook it up to run something........Larry N8zl
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  #37  
Old 10-05-2015, 08:57:53 PM
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Default Re: Fairbanks Morse ZC oil pumpjack

You know, we sold our fair share of Bell engines back in the day and if I remember correct, they came with and aluminum carburetor that had a float bowl on it but I can't remember if it contained a functioning float for gasoline operation. Did they? If so maybe the floats and needles are available? Maybe I need to call Bill Yarbrough?
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Old 10-06-2015, 11:31:04 PM
Allan Wright Allan Wright is offline
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Default Re: Fairbanks Morse ZC oil pumpjack

So that's where the aluminum carbs came from.
Do the Bell folks still have parts?
Thanks Eddie.
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  #39  
Old 10-07-2015, 11:30:05 AM
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Default Re: Fairbanks Morse ZC oil pumpjack

Bell went bell-y up. They sold all the parts at auction years ago. Jimmy Bell bought some of it, mostly 52 stuff if I remember. Bill Yarbrough is now a banker, I have had no contact with his brothers.
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