Hmmm...air leak.

[Shandro]

(10-14-2017 )dhirocz Wrote:  Update: new cab airbags helped. Certainly rides better.

Still have a leak. Going to be climbing underneath tomorrow to take a closer look at the supply tank, since I'm loosing out of both tanks when it's shut down.

One thing I notice when I used my tractor air compressor to air offload a split tanker load yesterday...I have a 1/2" fitting with a ball valve on the back of my tractor I hook up a hose to in order to pressurize tanks. Takes awhile, I don't do it often unless I have to. I prefer to pump offload instead.

When I opened the valve coming from my supply tank, the primary tank almost immediately went down to zero...by the time I finished, my secondary dropped down around 70. Since there are supposed to be check valves between the supply tank and the primary and secondary, I'm assuming this is a good indication that these valves are shot?

My understanding here is those valves protect you from loosing air in the primary and secondary tanks if the feed from the compressor or dryer is damaged or you somehow loose the supply side. Would that be a correct statement?

You are correct there are supposed to be check valves installed. Sounds like either they have failed or maybe they are not even there?