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Service Port question

rsulvan on Sun September 30, 2007 7:44 PM User is offlineView users profile

Year: 1991
Make: Ford
Model: F-150
Engine Size: 4.9L
Refrigerant Type: 134-A

Recently my low side service port began leaking even with the cap tightened. I purchased a new set of ports (conversion kit). The low side included a schrader valve installed in it but I could blow through the valve. I have a tire valve tool but, could not reach the valve with it to adjust it. The kit included a standard schrader valve which I installed in the accumulator fitting that the 134 retro valve screwed on to thinking that two valves would do the trick. No luck! The new cap sealed off the leaking port but, I don't think it will last long. Did I get a defective replacement port? Is it proper to have two schrader valves as described? Any help would be appreciated.

TRB on Sun September 30, 2007 7:50 PM User is offlineView users profile

One scharder valve per service port.

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Chick on Sun September 30, 2007 8:00 PM User is offlineView users profile

You proably bought the cheaper aluminum adaptor. (slip over the port) They use a shrader valve that depresses the existing shrader valve. You should get the steel or brass service ports, which have their own shrader valves and you need to remove the old one from the port before screwing them in... Check out the "Quality" service ports here that have their own shrader valves..

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rsulvan on Sun September 30, 2007 8:18 PM User is offlineView users profile

Thank you for the information. I will order one tonight.

mk378 on Mon October 01, 2007 8:27 AM User is offline

The aluminum ones just press any existing shrader valve open all the time, so it's a restriction but it doesn't help seal with the hose removed.

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