DEF pump pressure

moocowman

Active Expediter
Fleet Manager
I'm watching "DEF pump pressure". Once the "SCR Fore Exhaust Gas Temperature" gets above 300 deg F, "DEF Dosing Device Control Mode" changes to "Urea Dosing Enabled State" and the pump kicks on. Pressure goes to around 130 PSI (I was told 120-140 PSI is normal). At this time, "Pump Opening" is around 20%. And then sometimes "Pump Opening" goes to 75% and "Pump Pressure" goes to 943 PSI. I know the doser mode was in "After-run Retract" when I saw this number, but I don't remember of it ever shows that kind of pressure while in "Urea Dosing Enabled State". Is it even possible for the pump to make 943 PSI?
 
Top