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Oil Field Engines & Related Equipment

739 Fairbanks Questions


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  #1  
Old 02-15-2010, 10:14:48 PM
Pete Nichols Pete Nichols is offline
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Default 739 Fairbanks Questions

First I want to thank Chad for selling the engine to me .

Now for the ?'s :

Would this engine date with the standard Fairbanks serial # list ?
( the serial # is K 521699 )

Engine has brass Fairbanks Morse tag, then it has another small brass tag below it . This tag has the following info. on it : serial # 169 date 8-70 and bore 9.250 .

Is the small tag a rebuilders tag or something else ?

If I would buy a book for this engine would it show how to plumb engine for propane gas ?
Thanks for any help. I'm sure there will be more ?'s .

Thanks, Pete
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  #2  
Old 02-17-2010, 10:45:04 AM
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Doug Waggonner Doug Waggonner is offline
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Default Re: 739 Fairbanks ?'s

My 739 has a date cast into the cylinder casting. Your # of 521699 dates to 1922 Which is not correct. The K could stand for Kansas City

The smaller tag with the 8-70 date sounds like a rebuilders tag.

The ZC series of engines werent around before 1928, and I'm almost 100% sure that the ZC 739's didnt come into production untill after WWII

The parts book is available on line at www.arrowengine.com or give us a call and we will send you a copy of it.

If your engine has the origional carb on it, then your set for running on propane. There is a 3/4" NPT fitting on the side of the carb between the butterfly and the gasoline resivoir.
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  #3  
Old 02-18-2010, 08:44:04 AM
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Default Re: 739 Fairbanks ?'s

Mr. Pete,
want you please post some good pictures of the engine now sense all parts will be able to be seen..
it was a great pleasure to be able to meet you and your friend.
I hope there will times in the future that we will be able to get together again.
get the ole girl running and enjoy her for me...as i know you will.
Chad
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  #4  
Old 02-21-2010, 02:30:34 PM
Allan Wright Allan Wright is offline
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Default Re: 739 Fairbanks Questions

Pete, I did a little digging this morning and came up with some information. The 346, 503 and 739 came out in 1944. This information came from one of C.H. Wendel's books. I have a 1943-1944 Composite Oil Field book and it lists these engines in it.
Fairbanks moved their ZC line of operations from Beloit to Kansas City in 1953. So from that I would say your engine was made after this move in 1953.
Good luck with your engine and like Chad said, where's the pictures? Get the camera out Dude, we need to see.
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  #5  
Old 02-21-2010, 09:45:02 PM
Pete Nichols Pete Nichols is offline
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Default Re: 739 Fairbanks Questions

I got to mess with engine some today , Found some casting tags :

crankcase has 12-20-57 D
crankcase cover has 1-7-58 D
flywheels has 1-31-58 D
water hopper has 2-6-58 D

Looks like engine might be late '58 or early '59 .

I also noticed that all the part #'s have a KC just below them.

Also noticed the small tag that might be a rebuilders tag has GRAYCO along with serial# 169 date 8-70 bore 9.250 .
In my first post I had serial # as K 512699, but the serial # is K 521966.

I'm going to have to take the head off to get valves unstuck and clean the mice nest out !!!!!

Took the carb. apart to clean it out .( found a float and needle valve in the square part of body )

Is the carb. on these engine designed to start on gasoline and switch to propane?

After buying the engine don't have any money left for a camera !!!!!

Thanks for the help so far !!!!!!

Pete

Last edited by Pete Nichols; 02-21-2010 at 09:48:13 PM. Reason: add more
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Old 02-22-2010, 02:49:35 AM
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Default Re: 739 Fairbanks Questions

Yes, the factory carbs were set up so the operator could start them on gasoline then switch over to natural gas / propane. Do you see the 3/4" NPT threaded hole in the side of the carb? That is where you will plumb in your propane. Most charcoal/BBQ propanke regulators will work fine if your just wanting to run the engine as a display /no heavy load. The secret to making it run smooth as a clock is to use a real dial cock at the carb and the choke plate that goes inbetween the carb and air cleaner.
Once you switch it over from gasoline to propane, start choking off the air, and dialing down the propane with the dial cock. With a little fine tuning there you'll have that 739 running like a dream! You'll be surprised just how little propane it takes to make em run really slow.
Keep us posted on your progress!
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Old 02-22-2010, 06:50:59 AM
Pete Nichols Pete Nichols is offline
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Default Re: 739 Fairbanks Questions

Doug,
The carb, has a 1" npt hole for the propane. but there is no choke plate between carb. and air filter .

Pete
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Old 02-22-2010, 11:09:04 AM
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Default Re: 739 Fairbanks Questions

The part is # D-202-346 for the choke plate / air damper. The ZC346, ZC503 and ZC739 all use the same one. Arrow does not carry that one any more but you should not have any trouble finding a used one.
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Old 02-22-2010, 02:36:23 PM
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Default Re: 739 Fairbanks Questions

Ah, but Arrow still carries the 202-118 and it's the exact same thing. Grasshopper.
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Old 02-22-2010, 02:44:38 PM
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Default Re: 739 Fairbanks Questions

Quote:
Originally Posted by Reed Engine View Post
Ah, but Arrow still carries the 202-118 and it's the exact same thing. Grasshopper.
It is? I thought the D202 had larger bolt spacing? But I have been wrong once before......
But if Reed says its the same then, it's the same

Ok Pete, then thats what you need!
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Old 02-22-2010, 03:00:49 PM
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Default Re: 739 Fairbanks Questions

maybe but you can put any size vortox on the flange, remember the SA-78's on the C-66?
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  #12  
Old 02-28-2010, 07:55:01 PM
Pete Nichols Pete Nichols is offline
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Default Re: 739 Fairbanks Questions

Just wanted to do an update on this project !!!!

Got to work on engine a little bit today , got head took off of the engine .

Got it cleaned up and ready to put back on as soon as I get the parts that I ordered.

I don't think I'll have to do anything else to the engine because it looks really clean inside !!!!!!!

I still need to find a float for the gasoline side of the carb.

Pete
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Old 02-28-2010, 10:50:49 PM
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Default Re: 739 Fairbanks Questions

Which brings up a question, the floats and etc. for the carbs, are they still available anywhere? I have people call very so often asking and all I can tell them I've never seen any in my lifetime. Surely they were just some off the shelf item that was available at the time, like for a Pontiac or a Ford.
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  #14  
Old 02-28-2010, 11:13:11 PM
Pete Nichols Pete Nichols is offline
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Default Re: 739 Fairbanks Questions

Ed,
Float is no longer available from Arrow !(that is what Hit & Miss said)
My float is in real bad shape , I'm going to the auto parts store and look through their floats to see if I can find one that is about the same size !!!

What tight should I torque the head nuts to ? ( the studs are 1 inch )

Pete
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Old 02-28-2010, 11:45:29 PM
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Default Re: 739 Fairbanks Questions

You'll have to ask someone else, we never torque anything. We use a 3/4 breakover with a 3-4 ft swap pipe on it. Pull them down even is all.
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Old 03-07-2010, 09:34:20 PM
Pete Nichols Pete Nichols is offline
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Default Re: 739 Fairbanks Questions

Questions about valve guides:

I got some more cleaning done today and found that the exhaust valve guide is wore really bad with about 1/16th" side play !!!!!

Would brass or bronze be a good material to make a exhaust valve guide ?

Is the valve guides a weak spot for these engines ?

The head was replaced some time after 4-10- 84 ( found casting tag ).
The rocker arm stand has been replaced at some time also, has ARROW in the casting.
Both intake vales look like new !!!!!!!!!!!!!!!!

Thanks ,Pete

Last edited by Pete Nichols; 03-08-2010 at 07:33:10 PM.
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Old 03-07-2010, 11:24:25 PM
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Default Re: 739 Fairbanks Questions

New guides are available Arrow makes them. The exhaust valve is expensive!!! Intakes are 346 FM's.
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Old 03-07-2010, 11:31:49 PM
Pete Nichols Pete Nichols is offline
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Default Re: 739 Fairbanks Questions

Ed,
What does Arrow use to make their guides ?

Pete
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Old 03-08-2010, 08:33:42 AM
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Default Re: 739 Fairbanks Questions

Cast iron, all FM guides I've ever seen were cast iron. As to your question, the best guide material I know of is aluminum bronze or 9C. It would cost too much to build a guide out of, maybe an old one could be lined with it? Still would cost more than a new cast guide.
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Old 03-08-2010, 07:30:09 PM
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Default Re: 739 Fairbanks Questions

To put new guide in the head , is the old guide bored out to accept a bushing or is the old guide pressed out of head and replaced with new guide ?

About how much does the new guide cost ?

Also how much for new exhaust valve ?

My exhaust valve stem is about 8 thousands under size. I think it would last a long time ( for show only ) with a new guide !!!!!!!!!

Thanks Pete
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