Hey Bob, here's some info I have from CAT Excavators I used to work on when I worked for CAT. This is a spec from a 322B Excavator with a 3116 DI-TA JWAC. High Idle in machine 2098, Full load Rpm 1950, Boost at full load 18.6 psi, fuel pressure 29-58 psi (at r... Login to read more.