[RussWhite]

I think the hydraulic pressure switch is just a permissive for all functions of the sequence. In other words, on a properly operating system the pressure switch will make as soon as the extend/retract switch is pushed and will stay made through the entire sequence until the extend/retract switch is released. It is just there to allow the sequence to progress with normal hydraulic pressure. Should there be some failure of the hydraulic pump or low fluid and pressure cannot be built, the sequence would not proceed and none of the hydraulic solenoid would be actuated.