Have 2012 MACK CXU613 Pinnacle with air assist clutch with 62,000 miles & 1 year of use. Had clutch adjusted 3 times by dealer so far. Each time you go about 2,000 miles & you find the play is out of the clutch. On the 3rd time they pulled trans & put in new clutch brake (& requested 2 piece clutch brake) as they said lining was worn...& not warranty, but "driver error"~have driven MACKs for 12 years, and never had a clutch problem like this new truck!!! Has anyone else had this experience? I'd found the info on after market conversion kit on this site, & that was helpful to me. Actually told dealer to look into this kit as they had no clue.
