[77newell]

I'm really interested in how this works out since my understanding is that air from the compressor first goes to the supply tank and then is distributed through check valves to each of the two brake tanks. What Larry is experiencing says my understanding is not true.

Recently my service gauge has trailed the rise in brake tank pressures from zero until the brake tanks get to about 40 and then the service gauge will suddenly catch up. From then on they all rise together. I was guessing my gauge was sticking, but Larry's experience suggests something else may be going on. I'm eager to know how what he is seeing is possible.