A single air-hydraulic pump is mounted to the side of the RJ7W and operates independently from the four-post lift’s electric-hydraulic system. Connect an air line with 125 psi and 10 to 20 CFM, then use the foot pedal to activate the bridge jack while the vehicle remains positioned on the lift. Three locking positions let users raise the jack to a practical service height for the job. The RJ7W locks automatically as it rises and releases together as it descends, giving operators a controlled way to lift the frame while keeping four-post lift operation separate from bridge jack operation.