The Lippert 145736 is a direct OEM replacement outboard tube assembly for Lippert electric slide out arm systems. The gear rack comes pre-installed and the tube arrives powdercoated black, so you can swap it in without fabrication or extra hardware -- a critical advantage when your slide is out of service and you need a straightforward, confidence-inspiring repair.
Lippert slide out arm mechanisms use an inner and outer tube assembly to extend and retract your slide room. The outboard tube is the inner sliding member that carries the gear rack -- the component most exposed to wear, bending stress, and corrosion from road debris and weather. When this tube is bent, cracked, or stripped of its rack teeth, the entire slide becomes unreliable or inoperable.
Part number 145736 replaces the inner outboard tube on Lippert slide arm systems using 2 in x 2 in square tubing. At 72 inches long, it is sized for full-room slide applications common in Class A motorhomes, fifth wheels, and large travel trailers equipped with Lippert electric slide out arm assemblies.
The steel gear rack is already mounted on the tube, eliminating the need to transfer or press-fit a rack during installation. Saves time and preserves correct rack positioning.
Matches the OEM tubing specification for compatible Lippert slide arm assemblies. Verify your existing outboard tube cross-section before ordering.
Designed for standard full-room slide arm travel. Measure your current tube from end to end to confirm length before ordering.
Durable black powdercoat provides corrosion resistance and matches the appearance of Lippert OEM slide components.
Unlike raw tube stock, this assembly ships with the gear rack already installed and positioned. This is an important detail: rack positioning on a slide arm tube must be precise for the drive motor pinion to engage correctly. Using a pre-racked OEM assembly eliminates that variable from your repair.
Lippert slide out arm systems are used across hundreds of RV brands and models. The key identification points are tubing cross-section (2 in x 2 in for this part), tube length (72 in for this part), and whether your system uses an inner sliding outboard tube design. If your existing slide arm carries a gear rack on the inner tube and that tube slides within a larger outer housing, this part family applies. Cross-reference your current tube dimensions and part number against 145736 before ordering.
Lippert offers outboard tube assemblies in multiple lengths and tubing sizes. The 145736 is specifically 72 in long with 2 in x 2 in tubing. If your current tube is a different length or a different cross-section (such as 1.5 in x 1.5 in or 2 in x 3 in), you will need a different part number. Ordering the wrong length will result in incorrect slide travel and potential damage to the slide mechanism.