Vacuum Leak - Diesel Truck Forum -
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post #1 of 3 (permalink) Old 03-26-2008, 10:55 PM Thread Starter
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Vacuum Leak

Sorry for the double post, but I need to get this fixed tomorrow if possible and I wasn't gettting too many views on the other post. I have a 2001 F250 supercab 4X4 with a 7.3 diesel. The AC stopped blowing out of the front vents and I believe that I have traced the problem to the diaphram looking thing that is on the R/F fender near the vacuum resivior. It black plastic, looks like it has a diaphram on the bottom and has a yellow/white rectangular top with Ford written inside an oval and >PA66-GF33< written under the Ford logo. It has an electrical connection on near the top and two staggered vacuum connections near the bottom.

Can anyone tell me what this is and if it would cause the vacuum problem? I hate to replace perfectly good parts. If I plug one of the vacuum lines that goes to it the AC and the front hubs work properly and the resivior will fill allowing the pump to cut off. Thanks for any help. I will be going to the Ford Dealer tomorrow unless someone can point me in a better direction.
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post #2 of 3 (permalink) Old 03-27-2008, 03:46 AM
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thats the 4x4 hub solenoid. sends vaccum to thehubs to lock them when you turnthe 4x4 knob.

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post #3 of 3 (permalink) Old 03-28-2008, 09:28 PM Thread Starter
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Well I bought a valve Assembly part number 7C3Z-9H465-A and installed it. Everything now works as it should again. Total cost 37.92 with tax. If anyone else has trouble with their AC or Front hubs it is probably as simple asjust finding the leak.
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