Dual Sequence Application with a "Kick-Down" Twist
The Simplified Solution:
Although Kick-down sequence cartridges do open at a preset pressure, they differ from standard sequence valves in that they shift and stay open (much like a 2-way directional valve) and do not maintain the sequence pressure in the primary circuit. By changing the original RS*C valves to SQ*B Kick-down sequence cartridges, the jack legs are now lowered at only the pressure needed by the jack cylinders. It was now very easy for the operator to detect ground contact, and the pressure shown on the gauge while lowering the jacks represented the jack pressure, not the sequence pressure setting.