The LiftMaster 480LM RJO Alternate Mounting/Extension Kit is a genuine accessory engineered to solve tricky installations of LiftMaster wall-mount jackshaft garage door openers. When standard side room is limited or the torsion shaft does not extend far enough past the end bearing plate, this kit provides the hardware needed to properly couple the operator to the torsion tube and support the bearing, helping maintain alignment and smooth, reliable operation. It’s a practical solution for retrofit, replacement, and upgrade projects where obstructions or framing prevent a direct mount next to the door.
Designed for the Residential Jackshaft Opener family, the 480LM is commonly used with LiftMaster models 8500 and 8500W and is also referenced for earlier 3800 units; consult your opener’s manual for model-specific guidance. The kit includes specialized brackets, a shaft coupler/extension, and installation hardware tailored for sectional doors equipped with torsion springs. No programming is required for the kit itself, but installation should be performed by a qualified garage door professional due to torsion spring tension and alignment requirements. Use only on properly balanced sectional doors that meet RJO opener application guidelines. This OEM LiftMaster accessory is a dependable choice for buyers searching for an alternate mounting bracket, jackshaft extension kit, or replacement part to complete a residential wall-mount opener installation.
