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Old 09-04-2020, 02:17 PM
  #5  
The Peddler
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I just read your original post again... is the pump stopping right-away, but the pressure is not releasing, or is the pump continuing to run after you release the truck brakes?

If the pump stops, but the pressure doesn't release, you may have a pinched/kinked brake line some where, or the valve/s in the pump are gummed-up? I'd try to thoroughly flush/bleed the lines.