The Lippert 334649 is a direct-replacement outboard inner tube assembly designed specifically for 2x2 hydraulic through-frame slide-out systems. At 72 inches in length and built to work with the 18-tooth gear drive, this is a precision slide-out component that keeps your room operating smoothly and safely. If your existing tube is bent, corroded, or worn, swapping it with the correct OEM-spec replacement is the right call before a minor issue becomes a full slide-out failure on the road.
Lippert's 2x2 hydraulic through-frame slide-out system is one of the most common heavy-duty slide mechanisms found in larger travel trailers and fifth wheels. The outboard inner tube is the structural component that travels through the frame rail, extending and retracting the slide room under hydraulic pressure. Getting the correct replacement -- right length, right cross-section, right gear compatibility -- is critical to a safe, aligned slide operation.
This assembly is sold individually. If your rig has multiple slide rooms using 2x2 hydraulic through-frame assemblies, order the quantity needed per room. Always verify your current tube dimensions and gear tooth count before ordering.
72 in. length with a 2 in. x 2 in. cross-section -- an exact spec match for the 2x2 hydraulic through-frame system. No trimming or modification required.
Engineered for use with the 18-tooth gear drive used in Lippert 2x2 hydraulic through-frame slide assemblies. Mismatched gear counts cause binding and premature wear.
The outboard inner tube bears the mechanical load of slide-out extension and retraction. Only replace it with the correct Lippert OEM part to maintain system integrity.
One tube assembly per order. Verify how many your slide system requires before purchasing. Many single slide rooms use one outboard and one inboard tube assembly.
In a Lippert through-frame slide-out system, the slide mechanism uses a set of nested tubes that travel through the RV's main frame rails. The outboard inner tube is the primary moving component -- it is driven by the hydraulic actuator and gear system to push the slide room out and pull it back in. It rides inside an outer tube that is fixed to the frame. Over time, the inner tube can develop surface rust, physical damage from road debris, or wear at the gear contact points, all of which degrade slide performance and alignment.
Replacing a hydraulic through-frame slide tube is a moderately advanced repair that involves safely supporting the slide room, depressurizing or relieving the hydraulic system, and disassembling the gear and tube stack. It is strongly recommended that this work be performed by a qualified RV technician or an experienced DIYer with proper tools and a second person to assist with the slide room weight.