B47 no I did not adjust the on off switch setting I left that as it was. I simply cleaned the seat of the check valve and stretch the spring slightly so that it seated again. The shut of head of the pump I don't think would be adjusted but to be honest I cannot remember where or how the pressure was sensed but it was down stream of the check valve.
2011 F150 Ecoboost Screw 4x4 c/w max tow
2010 Roo 21RS