The pressure switch is installed at an angle so I can crack the tube fitting to bleed the air out the circuit.

The cover slides back and you can adjust the line lock pressure from 100 to 1500 PSI.

 

It is wired to set my line lock pressure the same every time - no matter how hard I stomp on the brakes at the line.
Looks like a B17 fuselage with all the hydraulic lines.