you can adjust pressures through the display screen. With key off push/hold one of the unmarked buttons on the panel * its one of the two on the right, cant remember which because the machine isn't in the yard* turn the key on and it should be in "service mode" then scroll through the options and one should be for pressures for tools I.E. thumb, hammer, etc. If you still cant get it, I'll have to wait til the machine comes back from rent to give you a step by step.