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1/2 a quart. Take the line off the wet tank and add it in there. That way it will circulate. You can put some on the charging line going into the air dryer but do not use a lot. The dryer will just soak it up and not let it circulate. The wet tank holds most of the crap in the system. The...

Could be. Unplug the breaker and see what happens Sent from my SM-G860P using Tapatalk

Wire 587 goes up to the drivers side firewall circuit breaker. Which in turn goes to the spring brake override. Before the breaker it goes to the pcb and is spliced in with the alternator. Sent from my SM-G860P using Tapatalk

I had a 923 over the weekend would build pressure to 130 and not blow off. Went for a drive and hit a few bumps and it worked again. I have air brake antifreeze in mine and has no issues. If the pressure wont blow off just Crack your two middle drains and let them bleed off. If you have to...