The Lippert 334650 is a direct OEM replacement inboard inner tube assembly designed specifically for 2x2 electric through-frame slide-out systems. If your slide-out tube is bent, worn, or damaged, this is the correct structural replacement component -- engineered to Lippert factory specifications and compatible with 18-tooth gear configurations using a rear roller setup.
Lippert through-frame slide-out systems are among the most common slide mechanisms found on fifth wheels and travel trailers. The inner tube assembly is the structural core of the slide-out -- it extends and retracts through the frame rail and bears the load of the room during travel and use. When this component is damaged or worn, proper room travel and sealing alignment are compromised.
Part number 334650 replaces the inboard inner tube on 2x2 (2-inch by 2-inch) electric through-frame assemblies. It is matched to systems using an 18-tooth gear with rear roller, which is a specific drivetrain configuration -- confirm this matches your existing gear before ordering.
Engineered to Lippert factory dimensions for drop-in replacement in 2x2 electric through-frame slide-out systems.
Designed for use with 18-tooth gear and rear roller configurations -- a common Lippert electric slide-out drivetrain spec.
This is the inboard (interior-side) inner tube assembly. Verify inboard vs. outboard position before ordering.
At 28 lbs., this is a heavy-duty structural component built to handle the repeated load cycles of a full slide-out room.
In a Lippert electric through-frame system, the slide-out room rides on inner and outer tube assemblies that nest together and slide through openings in the RV frame. The inner tube attaches to the room itself and travels in and out with it. The inboard inner tube is the one positioned toward the inside (center) of the RV when the room is retracted.
These tubes are subject to significant stress -- road vibration, load shifts, and repeated cycling all contribute to wear. If you notice the room sitting unevenly, binding during travel, or failing to seal correctly, the inner tube assembly is one of the first components to inspect.
Replacing an inner tube assembly is a significant service job. The slide-out room typically must be partially disassembled or supported while the tube is removed and reinstalled. Key steps generally include:
Motor, gear assembly, outer tube, mounting hardware, and slide-out room components are not included. This is the inner tube assembly only.