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Case Tractors Discussion Forum
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Will DC carb fit and work on SC

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Dave Fullmer (T

09-21-2004 18:43:41




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I have asked this question elsewhere, but I am hoping that the subject line question will alert someone who has tried it. I mean no offence to the couple of answers that I received but it almost sounded as if they might not have been positive that the carbs wouldn't interchange. How about it? Any one tried it?

Also, this SC was a dual fuel tractor with an intake manifold that has a lever to move to various spots for optimum usage (I assume) of the fuel. Obviously it has set up, but I wonder if it is worth freeing up and if so, what would be the best method? Is there anybody that attempts to still use both fuels? I know that the engine has to heat up before the kerosene will ignite. Probably the idea isn't worth monkeying with.
Thanks,
Dave

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another Will

09-22-2004 08:55:49




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 Re: Will DC carb fit and work on SC in reply to Dave Fullmer (TN), 09-21-2004 18:43:41  
Don"t sandblast the manifold. No way can you get all the sand out of the innerds. The stuff inbeds in the metal and will be sucked in to the engine. Not good on the cylinder walls.



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L.Lamp

09-21-2004 19:37:27




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 Re: Will DC carb fit and work on SC in reply to Dave Fullmer (TN), 09-21-2004 18:43:41  
Will the carburetors interchange from an SC to a DC or vice versa? No. To make it simple, the DC Carb is much larger and the intake side has a flange that bolts directly to the air cleaner box. The SC connects to the air cleaner with a short piece of radiator hose. I won't say it couldn't be done but you will be doing a powerful amount of modifying which wouldn't yield a satisfactory result. The all fuel question depends on what type of pistons are in the tractor and what head number it has. If your tractor has high compression aluminum pistons, forget about all fuel. If it has flat cast iron pistons and 5618 head with orifices in the intake ports, then you have a factory all fuel setup. If the head number is 5617, it is a high compression head for use with gasoline. Kerosene costs more than gasoline so why bother with the all fuel setup other than to say you have one. If you forget to switch to gas before you stop it, it will take you a while to get it to run again. Why aggravate yourself?

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Dave Fullmer (TN)

09-21-2004 20:00:07




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 Re: Will DC carb fit and work on SC in reply to L.Lamp, 09-21-2004 19:37:27  
Thanks L.,
Your info gives me specific reasons why the DC carb won't work.
The reason I asked about the dual fuel was more regarding showing. I get a lot of questions from folks on the 2 tanks on my 37 WC Allis and I explain to them why they were used. I just wondered if anyone ever tried to demonstrate at shows. Of course, show tractors don't really get much chance to work hard enough to heat up well enough to burn kerosene anyway. Also, your point about having a chance of having to start without burning up all the kerosene is a good one too. Makes me wonder what the old farmers did when they killed the engine. You would have to drain all the kerosene out of the carb to get it started again. You're right, it isn't even worth the trouble of thinking about it. Should I just sandblast the manifold the way it is and paint it?
Dave

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C. Amick

09-22-2004 14:20:15




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 Re: Will DC carb fit and work on SC in reply to Dave Fullmer (TN), 09-21-2004 20:00:07  
I wouldn't mess around with trying to free up the lever on that manifold. I also wouldn't sandblast it either. The metal may be already getting thin. I have one SC that has the dual fuel manifold that I run on kerosene. Does the tractor have working shutters on the radiator? It needs to start on gasoline and switch to kerosene at 180 degrees. Then switch back to gasoline before you shut it off. It will start on kerosene just fine if you kill it and the engine is still hot. I think you will find with the dual fuel manifold it will run better on kerosene than gasoline. If you want to convert to gasoline, I have a gasoline manifold that I will gladly trade you for the dual fuel one.

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Dave Fullmer (TN)

09-22-2004 15:58:10




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 Re: Will DC carb fit and work on SC in reply to C. Amick, 09-22-2004 14:20:15  
Thanks again C.,
The lever presently is all the way clockwise to the last detent. I would suspect that probably is the setting for gasolene. Are you saying that the tractor will run better on another manifold than this one even if the lever is in the correct position? This tractor has no shutters that I can detect. No levers or even a hole in the grill for a handle. Couldn'y you put a thermostat in to get the engine to 180 degrees?
Also, does the sleeves and rings wear better burning kerosene? I think this tractor probably was using gas because the tubing from the aux tank has been cut off. Of course with no carb, that might not mean much depending on how they disconnected the carb when they took it off.
Thanks,
Dave

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C. Amick

09-22-2004 18:03:52




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 Re: Will DC carb fit and work on SC in reply to Dave Fullmer (TN), 09-22-2004 15:58:10  
I think the lever on my tractor is pushed all the way counterclockwise. I think someone told me that all the way clockwise is the kerosene setting. I was afraid to try moving mine for fear of breaking something. I think it will probaqbly run on kerosene turned either direction. The lever probably just fine tunes it. Yes, a thermostat installed in the upper radiator will work as well as shutters for a quick warm up. There are removable cast iron restricters (make port smaller) in the intake ports of the head for kerosene running. I think that's mainly why my tractor runs better on kerosene. All the SC's that I've seen (at least 1949 and older) are set up to accept shutters. There is a slot in the instrument panel for the lever and a hole for a rod at the top of the radiator bracket. There are no holes in the grill for the shutter controls. I would think that the rings would have a shorter life using kerosene because there seems to be more carbon.

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