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Las Cruces and the Butte here!!!!

Turns out that the valve I was working with is nothing more than a "relief valve" with a lite duty spring which pulls the little dust cap back in place. I have now replaced the ECU and the PCU with a manual regulator assemby. I fabricated a bracket that mounts to the same location as the ECU...

Good to know on the tire pressure. I will try to ohm it (PCU transducer) out per one of the TM's instructions. Thanks!

That is good to know! I had installed a 120 psi valve that I had on hand, my tire pressure went to 75 psi with the solid red Hwy light on the ECU, so plugging it may not be my best option. I think I will get a generic 65 psi valve and see how the tires respond to that! Thanks again for your help!

That is correct. It is not holding any pressure...just venting. If I hold it closed, my ctis works like it is suppose to....my finger is getting tired so I would like to install a replacement relief valve! Just can not find what it is rated at...I'm guessing over the 60 psi for the fill side of...

Actually I am talking about the pneumatic control unit (pcu)pressure relief valve or safety relief valve (mounted underneath the winch control tower on a M932A2)...not a pressure switch. I have read through just about every TM that is related to tyour helphe CTIS system on the truck....just can...

Thanks for the info...this site has been a big help....Sorry about the location...did not see anyplace to put it (New Mexico)! I searched the treads but....so I guess I proved I'm not a computer guy!

Does anyone know the PSI rating of the pressure relief valve on the Pneumatic Controller? I thought it was 120psi?