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Farmall radiator short neck vs long neck ?

A

Anonymous-0

Well-known Member
A,SA, 100, 200, seem to have a difference in the radiator cap pressure, dependent upon whether the radiator has a "short neck" or "long neck". I think the PSI difference is 9 # or 16 #.

Anyone know how to measure "short" and "long", and what psi cap goes with which ?
 
Maybe it has to do with having a water pump or not? I don"t think the thermo syphon systems were pressurized.
 
Never heard of the short neck, long neck thing. A was not pressurized from the factory, replacement radiators may be pressurized. Early Super A's were not pressurized, later ones were. Pressure cap and radiator changed with the Super A1. Don't know about the rest. Part numbers are in the parts section of www.caseih.com.
 
Later ones were, both C and Super A. I have both of those tractors, radiators are pressurized -- parts book shows that.
 
CNKS is correct, the non pressurized systems used a cap thet was very much like a gas cap. While all others were compatible with regular radiator cap style. I do not recall any early system over 7psi, none were 15+ at all. JimN
 
couv1: There were 3 different radiators, if you can notice the difference in neck length, you've got sharper eyes than most of us. I suspect if you have a long neck radiator, it came from a baler, swather, etc.

The non pressurized was used on all A, B, C and Super A up to serial number 336711. After that the rad was pressurized. Super C, Super A1, 100, 200, 130, 230, 140 and 240 all had a 2" higher pressurized radiator. (basically all C-123 engines) Through all this there was little difference in neck length. In fact, I'm betting neck was exactly same on all pressurized radiators used in tractors. The non pressurized radiator neck may be 1/2" longer, not even sure it's that much.
 
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