Keep your RV slide out moving smoothly with the correct OEM-spec tube assembly. The Lippert 143677 is the inboard outer arm tube for the drive side of Lippert electric slide out systems using 2.5 x 2.5 inch square tubing -- a direct replacement that restores proper geometry and function without custom fabrication.
Lippert slide out systems use a precisely matched set of inner and outer arm tubes to extend and retract your room. The outer tube on the drive side is the one that takes the most mechanical stress -- it connects directly to the drive mechanism and guides the slide room through its full travel range. When this tube bends, cracks, or wears, the entire slide out loses alignment and reliable operation.
Part number 143677 is Lippert's own replacement for this specific position: inboard, outer, drive side, sized for the 2.5 x 2.5 inch square tubing cross-section used across a wide range of Lippert-equipped fifth wheels, travel trailers, and motorhomes. Using the correct part number matters -- the drive-side and curb-side tubes are not interchangeable, and inboard vs. outboard positions have different lengths and bracket configurations.
Engineered to Lippert factory specifications for drop-in replacement without modification to your slide out frame or drive components.
Designed for the drive-side inboard outer position. Maintains correct load path and alignment with the slide motor and rack assembly.
Matches the tube cross-section used on many Lippert electric slide systems. Verify your existing tube dimensions before ordering.
Heavy-gauge steel tube built to handle repeated slide cycling under load in all weather and road conditions.
In a typical Lippert two-tube slide out arm, the drive side assembly is mechanically linked to the motor or actuator. It must maintain precise alignment through thousands of extension and retraction cycles. A bent or worn drive-side tube causes uneven room travel, binding, gear wear, and in severe cases, slide room damage. Replacing this tube restores the correct mechanical advantage and protects downstream components.
This assembly is used across numerous Lippert OEM slide out configurations installed in rigs from Forest River, Keystone, Coachmen, Heartland, and other manufacturers who sourced Lippert slide systems. The 2.5 x 2.5 in. tube size is common in mid-size and full-size slide rooms. Smaller rooms may use 2.0 x 2.0 in. tubing -- measure your existing tube cross-section if unsure.
Replacing a slide out arm tube is a mechanical task that requires safely supporting the slide room, disassembling the arm brackets, and transferring hardware to the new tube. The process varies by coach configuration. Support the room fully before removing any fasteners, and work with a second person to manage the room weight during reassembly.