Yukonjazz Posted February 4, 2016 Share Posted February 4, 2016 My 1996 RD685S Mack has been idle for many months. Yesterday I started her up, built up air pressure to 120 psi, (both needles of the guage) but none of the auxiliary accessories would activate. (Cab leveler, air seat, and PTO) Is there a valve I should check and where is it located? Quote Link to comment https://www.bigmacktrucks.com/topic/43882-auxiliary-air-system-issue/ Share on other sites More sharing options...
alex g Posted February 4, 2016 Share Posted February 4, 2016 Possibly froze up with ice? Pour some methyl hydrate in your supply line from your compressorSent from my SM-G386W using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/43882-auxiliary-air-system-issue/#findComment-322983 Share on other sites More sharing options...
Yukonjazz Posted February 5, 2016 Author Share Posted February 5, 2016 It has been in the 50's here in the Northeast the last few days. I loosened line and tapped valve with a wrench in must have had corrosion or something in there causing it to stick. It's working again, thanks. Will add the methyl hydrate as a preventative. Quote Link to comment https://www.bigmacktrucks.com/topic/43882-auxiliary-air-system-issue/#findComment-323107 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.