Engine Size: 455
Country of Origin: United States
I have a 70 442 and I want to get the A/C working. Currently it is disconnected. I want to switch to 134. I have flushed out the system. What do I need to change and do to get it to where I can just bring it to a shop and just have it charged? I don't have any a/c tools. Can I adjust the POA without gauges? When I look into the POA all I see is a nut. Do I need to change out any other parts? Thanks
You really need gauges to set the POA. It is unlikely the average shop will be willing to do this for you - most of them barely recall the POA at all.
Here is the POA recalibration page. Once you get the valve set, you will need a new receiver / dryer that is compatible with 134a.
You should make sure that your fan clutch is working properly, and that no air bypasses the condensor on it's way to the fan.
"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.
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