1966 AC repair & Conversion | Ford Thunderbird club group 1955-2005 T-Bird models

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1966 AC repair & Conversion

J

Joeomarsh

Gold Member
Reaction score
4
Thunderbird Year
1966
Hi, I'm restoring a 1966 Converible with AC. I have disassembled the complete system and will change all the hoses to barrier hoses, new condenser, new expansion valve and flushing the Evaporator. I will fill the system with R134a to 80% of the R12 level as recomended. However, the shop manual does not describe the valve mechanism that is part of the sight glass where it connects to the dryer. Does anyone know what this valve was suppose to do? Can I eliminate it and the sight glass? It appears to close when taking the sight glass off the dyrer but opens completely when the sight glass is refitted to the dryer. My guess it is some sort of factory shipping valve for the condenser but ??

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I can't verify but once heard that parts of the system were precharged with freon and that kind of valve what how they held the precharge in place. Once assmbled the valve opened and the freon was then free to move about the system. I don't think you need it and seems like it would be a needless restriction anyway.
 
Tom Alpers said:
I can't verify but once heard that parts of the system were precharged with freon and that kind of valve what how they held the precharge in place. Once assmbled the valve opened and the freon was then free to move about the system. I don't think you need it and seems like it would be a needless restriction anyway.
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I think your you are correct and I will eliminate it since the sight glass doesn't work for R134a anyway and there seems to be no way to keep it and switch to a reduced barrier hose. Thanks for the reply ! If I get it blowing cool I'll list the secert reciepe. It is involved !
 
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