Patent ID: 8757637

Claim:
A system for leveling a vehicle when stationary, where the vehicle includes a front end and opposite sides, with at least one wheel proximate one side and at least one wheel proximate an opposite side, the system comprising a. three leveling zones, with a first zone located near the front end, a second zone at the one side and a third zone at the opposite side, b. the first zone comprising at least one first zone leveling jack having a blind side and a rod side, c. the second zone comprising at least two second zone leveling jacks, each second zone leveling jack having a blind side and a rod side, with one of said second zone leveling jacks being fore of the wheel on said one side and another of said second zone leveling jacks being aft of the wheel on said one side, and with the blind sides of said second zone leveling jacks being connected to one another, the second zone further comprising a second zone isolation valve operable to selectively isolate said blind sides of said second zone leveling jacks from said blind side of said first zone leveling jack and said blind sides of said third zone leveling jacks while simultaneously allowing equalizing of fluid pressure among said second zone leveling jacks, d. the third zone comprising at least two third zone leveling jacks, each third zone leveling jack having a blind side and rod side, with one of said third zone leveling jacks being fore of the wheel on said opposite side and another of said third zone leveling jacks being aft of the wheel on said opposite side, and with the blind sides of said third zone leveling jacks being connected to one another, the third zone further comprising a third zone isolation valve operable to selectively isolate said blind sides of said third zone leveling jacks from said blind side of said first zone leveling jack and said blind sides of said second zone leveling jacks while simultaneously allowing equalizing of fluid pressure among said third zone leveling jacks, and e. the rod sides of all leveling jacks being connected to a common fluid line.