A/C System Pressures
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From: Pilesgrove NJ
A/C System Pressures
Will be purging and re servicing the a/c in my F250 once it warms up enough around here. Does anyone have a reference for the system pressures. Thanks.
jerry
jerry
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Joined: Jul 2005
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From: Middle Tn.
Just google it. They will have press. charts that show for amb. temp vrs. humidity. Select the proper freon chart, 134A, and hook your gauges. If you empty the system you need to vacum it down to 28 inches of water for 1 hour to boil off any moisture in the system. Why are you going to"purge the system" Strange terminology.
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From: Pilesgrove NJ
Sys has a very slow leak in it so I will empty it then replace and tighten up all the seals and joints. I also want to insure that the correct amount of oil is in there. Have the vac pump and gauge manifold but want to get the r134 charts to insure the correct fill pressure and quantity.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 26
From: Middle Tn.
Sys has a very slow leak in it so I will empty it then replace and tighten up all the seals and joints. I also want to insure that the correct amount of oil is in there. Have the vac pump and gauge manifold but want to get the r134 charts to insure the correct fill pressure and quantity.
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Senior User
Joined: Aug 2009
Posts: 147
Likes: 1
From: Pilesgrove NJ
While you have the system open you might want to replace the orifice tube. It's like tuning the system up if it has any blockage. Under 10 bucks at most parts stores. A common place for these systems to have a slow leak is the schraeder valves. Cheap to replace while the system is open.
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dunebuggys
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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