ayoarod88 Posted July 2, 2021 Share Posted July 2, 2021 Hello. I have a 2008 CXU613 with an air assisted clutch pedal. When the clutch has no air in the tanks the pedal feels just fine but once air get to 90 psi and up, the clutch pedal drops all the way to the floor and I can’t put the truck in gear. As soon as you get the truck to under 90 psi the truck can go into gear again and I get pedal back. I’m just wondering if there’s a regulator or something I’m missing. I replaced the air cylinders but that did nothing. Any suggestions would be much appreciated. Thanks. Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted July 2, 2021 Share Posted July 2, 2021 (edited) There is a regulator, here is some info that might help you. https://www.mid-americaclutch.com/wp-content/uploads/2018/05/Mack-Truck-SB313005-Air-Operated-Clutch-Assist-Adjustment-Troubleshooting.pdf Edited July 3, 2021 by Onyx610 Quote Link to comment Share on other sites More sharing options...
Onyx610 Posted July 3, 2021 Share Posted July 3, 2021 You can switch them over to a standard clutch cable as well too. Quote Link to comment Share on other sites More sharing options...
fjh Posted July 3, 2021 Share Posted July 3, 2021 8 hours ago, Onyx610 said: You can switch them over to a standard clutch cable as well too. Yup ! You have to change the arm on the side of the trans ! Quote Link to comment Share on other sites More sharing options...
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