This vid shows installation per Happijac's instruction sheet.. Installation 1. Use 1/4 " diameter wood or self-tapping sheet metal screws (OEM-supplied) of sufficient length to safely secure the C-channel vertical rails to hold 500 lbs per platform attachment (static load). NOTE: Screws MUST NOT interfere with any moving parts of the bed lift system.
View and Download Lippert Components Happijac installation manual online. Bed Lift. Happijac lifting systems pdf manual download.. Stowing The HappiJac Bed Lift system has a stow feature for the upper trolley, where the upper limit switches stop the upper trolleys in uppermost position to provide maximum space underneath the bed platform attached to the upper trolleys. NOTE: Lower trolleys can still move up and down when the upper trolleys are in the stowed position.