![]() The main barrel unscrews from the large nut, exposing the magnetic armature and aluminum pin, this pin in turn pushes on the small spool for the pilot valve. The metal cover for the coil has three stake marks that are difficult to disengage from the large nut - I was able to use two small screw drivers and gently convince the staked areas out of the locks. Now I have also seen vids of air testing done and the air pushed thru easily - I am suspecting there are different versions of the IPR valve.ĭisassembly was pretty straight forward, tho I did use the collets on my mill to hold the smooth parts of the valve body, so as not to damage it. I have heard tales of the IPR holding a minimum pressure of 250, and my test sort of confirms this. My air compressor cuts in at 150 and out at 175, but was not able to push any air thru the valve. I tried using air to blow thru the valve and my power supply to activate the coil, this was not successful. I did not see anything with the valve to cause it not to work upon initial inspection. The valve was questionable in operation on his truck. ![]() I was fortunate to get a valve from a member here. I read a lot about the IPR valve and "how it is supposed to work", but sadly there is not a lot of accurate information about the insides of the valve or the operation.
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