An OEM-matched replacement arm for Lippert 2x2 hydraulic through frame slide-out systems. If your inboard outer arm is bent, cracked, or worn past reliable service, this direct-fit 70-inch component restores correct geometry and smooth slide-out operation without fabrication or modification.
The inboard outer arm is a structural linkage component in Lippert's 2x2 hydraulic through frame slide-out system. It connects the hydraulic actuator to the slide-out room carriage, transmitting extension and retraction force while maintaining the room's alignment throughout its travel. A damaged or fatigued arm causes binding, uneven extension, and potential seal damage -- problems that compound quickly on the road.
At 70 inches in length and 10 lbs, this arm matches the OEM specification for the systems it was designed to serve. Using a genuine Lippert part number ensures correct hole patterns, pivot geometry, and material gauge -- no shimming or drilling required.
Engineered to Lippert factory spec for 2x2 hydraulic through frame systems. Matches original mounting points and pivot locations.
Full 70-inch arm length engineered for the slide travel range of compatible Lippert through frame installations.
At 10 lbs, this arm keeps unsprung and moving weight low while maintaining the structural rigidity the hydraulic system requires.
Designed specifically for the inboard outer arm position in the 2x2 configuration -- not interchangeable with other arm positions in the assembly.
Lippert's 2x2 hydraulic through frame slide-out system uses two hydraulic cylinders (typically one on each side of the slide room) running through the main frame rails of the coach. Each side of the system uses a set of arms -- inboard and outboard, inner and outer -- to transfer hydraulic force into controlled room movement. The "inboard outer" designation refers to the arm's position in this four-arm arrangement. Ordering the correct position is critical; arms are not symmetric and are not interchangeable within the set.
Replacement of a through frame slide-out arm is a structural repair that requires the slide room to be fully retracted and the hydraulic system depressurized before disassembly. The arm connects via pivot pins and retaining hardware -- standard hand tools and a helper to support the arm during removal and installation are typically sufficient, but access to the through frame cylinder area may require removing belly pan material on some coaches.