13B) until the limit switches stop the lift's … Motor Plug - 10 - 1. Users can easily set the bed to a height that suits them best and will not need to climb, crouch or stoop getting out of bed in the morning. So buying my Carbon 327, one of the items that I caught on the PDI checklist was that I couldn't put the safety pins in the rear bunk bed without actually lifting the bed above the track trolley on one side. There are no pins or components to manipulate, lock into place, set up or store. happijac / happy jack bed adjustment Technical Corner. A powerful direct drive motor and patented self-contained track provide stability at any height at the flip of a switch.The HappiJac Power Bed Lift effectively maximizes existing vertical space, providing room for additional storage or sleeping/sitting area.HappiJac’s Power Bed Lift supports up to two queen size beds in an innovative, patented double bunk bed configuration. Position the bed(s) well out of the upper & lower limit switches if possible. For years Happijac® brand by Lippert Components has been an industry leader in RV interior space management. BRAKE MUST BE SET or beds will drift down and will damage objects or vehicles placed below the beds. Happijac® Power Bed Lifts feature quick timing adjustment and pre-assembled base-rail units. HappiJac Power Bed Lifts literally go where no slide has gone before.