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<p>[QUOTE=&quot;86scotty, post: 12282465, member: 203295&quot;]Sorry for the suspense.&nbsp; It&#039;s been a long week.&nbsp; WiChris nailed it, it is the emergency valve, aka spring brake valve, on the tank.&nbsp; I finally found the right part yesterday at Fleetpride.&nbsp; I left out Sunday night with a scheduled run to Boston and back and had to just wing it and haven&#039;t had time to update here.&nbsp; I drove for half a day with empty airbags but it was a light load and a frustrating couple of days.&nbsp; Eventually I got it working.</p><p><br /></p><p>But, it wasn&#039;t just that valve.&nbsp; My leveling valve was shot and leaking and I think both other pressure protection valves on my trailer tank were gone too.&nbsp; One issue kept fooling me for another issue.&nbsp; I was convinced last Sunday that the problem had to be supply from the tractor, which would point to tractor protection valve (where air lines come off back wall of tractor) but when I attached a gauge to my red glad hand I got 120 there so that ruled that out.</p><p><br /></p><p>Anyway, I&#039;ll report back one more time after I&#039;m 100% sure it&#039;s fixed but I&#039;m pretty positive the slow supply to trailer is from a bad emergency valve.&nbsp; </p><p><br /></p><p>I haven&#039;t put a lot in to this moneywise and feel alot better knowing all this stuff is updated and now I understand what lines go where and what controls what.&nbsp; Two pressure protection valves, emergency valve and leveling valve probably $250 total.</p><p><br /></p><p>One thing I did that some folks might consider is I added a female air coupler to my air tank.&nbsp; I did this primarily so I could plug an air gauge in to it to monitor the pressure in my tank while I figure out this problem but the long term win is I have air at the rear tank.&nbsp; In other words I can run an air hose/air tools or whatever from my trailer tank now.[/QUOTE]</p><p><br /></p>

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