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Case Tractors Discussion Forum

930CK LP questions?

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12-19-2005 19:18:07

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I've found a real nice 1967 Case 930 Comfort King Propane tractor. Tractor has sat more in the last 10 years than been used. At times, it runs very good and idles well, other times it sputters and dies. The regulator develops frost on it quickly on a 30 degree day. Is this normal and could the regulator or it's appendiges need cleaning or adjusting? Also, where the LP versions good tractors and problem free for the most part? Thanks in advance for any input.

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12-22-2005 06:06:17

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 Re: 930CK LP questions? in reply to A.Sellars, 12-19-2005 19:18:07  
will it freeze up every time you start it

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Roger in Ks

12-20-2005 20:15:08

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 Re: 930CK LP questions? in reply to A.Sellars, 12-19-2005 19:18:07  
Does the whole vaporizer freeze up or just a small plug in the middle of the vaporizer? You need to know the brand of carburetion on the tractor. If it is Ensign and it frosts around the plug in the middle, don't worry about it this is common. If it is Impco or Century and it is frosting around the primary or fuel inlet the primary valve needs to be replaced. If the entire vaporizer is frosting or "freezing off" then you are not getting good water flow. This could be caused by several things. Cold weather and not enough Anti-Freeze in the radiator. Before the motor warms up it will freeze the water in the back of the vaporizer blocking water flow. If the tractor has set for 10 years the water passage on the back could be plugged and water will not flow through the passages. Disconnect the water lines and blow air through the vaporizer. If the water passage is plugged you have problems. The screws that hold the back plate on are usually rusted into the main body and will twist off. You will need a "drive" screw driver. Try to tighten the screws first, then take them out. This is an act of deseration as the vaporizer should probably be rebuilt. Not sure which vaporizer you have but make sure the water is connected correctly. It works just like a radiator, hot water in the top and cold out the bottom. This is not critical but can cause problems sometimes.

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12-21-2005 19:14:42

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 Re: 930CK LP questions? in reply to Roger in Ks, 12-20-2005 20:15:08  
Roger, I will check out the type vaporizer it is, but the entire unit "frosts up" after it runs for only a minute or so. Then it will not start at all until the frost is gone. I thank you for any help you can provide me. The tractor has sat alot in the last few years but is otherwise an excellant, straight original low hour tractor. I would really like to find an operator's manual for this 930 CK LP tractor.

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Roger in Ks

12-21-2005 19:57:27

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 Re: 930CK LP questions? in reply to A.Sellars, 12-21-2005 19:14:42  
If the entire vaporizer is freezing up the water is not flowing through it. The water passage on the back is a maze. The passage ways are small and curve around the back. Either the passage is plugged, poor water circulation - thermostat, low Anti-Freeze level. If the anti-Freeze is low the water will freeze in the passage ways and not move. As the LP Gas vaporizes it will freeze the water very quickly. You have to have water flow, even if it is cold water to keep the vaporizer from freezing. You can poor hot water over the vaporizer to thaw it out. Be careful and don't get any in an open vent on the front of the vaporizer.

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Dairy Boy Tom

12-20-2005 10:33:23

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 Re: 930CK LP questions? in reply to A.Sellars, 12-19-2005 19:18:07  
i wouldn't open that regulator if i was you, because you cant get parts for thoose anymore,, i opened one of those and it never worked right. i just had to buy a whole in set up.

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12-20-2005 10:18:43

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 Re: 930CK LP questions? in reply to A.Sellars, 12-19-2005 19:18:07  
I had the same problem with my 900 the thermastat was sticking and not allowing the hot water to go through the regulater/asperater so then it would freeze up. It got so bad that the carb had frost on too.The water pipes that go through the asperater should be hot when engine comes up to temp.


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