11-08-2021, 07:09 AM
Well something is amiss. The 120 shouod be triggered off the supply pressure. And if the brake tank pressure is dropping, then the supply pressure should drop to replenish the brake pressure. Michael has posted a series of videos explaining the workings of your air system. I am remote or i would imbed the link for you. The videos will help you noodle this out.
Richard and Rhonda Entrekin
95 Newell, 390 Ex caretaker
99 Newell, 512 Ex caretaker
07 Prevost Marathon, 1025
Maverick Hybrid Toad
Inverness, FL (when we're home
