When your hydraulic slide room won't extend or retract reliably, the actuator is often the culprit. This is the genuine Lippert (LCI) replacement hydraulic actuator -- aluminum construction, 35-7/16" overall length, 24-1/2" stroke, and a 1-1/2" bore -- designed as a direct OEM drop-in for compatible Lippert hydraulic slide-out systems found on a wide range of fifth wheels, travel trailers, and motorhomes.
Lippert hydraulic slide-out systems are found on hundreds of RV models from manufacturers including Forest River, Keystone, Jayco, Coachmen, and many others. When a slide-out actuator develops an internal leak, loses pressure, or physically fails, replacing the actuator cylinder is typically far more cost-effective than replacing the entire slide mechanism.
Part number 425667 is the correct Lippert actuator for systems specifying a 35-7/16" overall length, 24-1/2" stroke, and 1-1/2" bore diameter. Always verify your existing actuator's measurements and your coach's service documentation before ordering to confirm fitment.
Lightweight aluminum cylinder body resists corrosion and keeps unsprung weight low on slide mechanisms.
Full 24.5-inch stroke provides the extension travel required for deep slide rooms on LCI hydraulic systems.
Standard 1.5-inch bore matches the hydraulic flow and force specifications of the compatible LCI pump and valve assembly.
Genuine Lippert part 425667 -- not an aftermarket approximation. Correct geometry for factory mounting points.
Lippert hydraulic slide-out systems use a 12V DC hydraulic power unit to pressurize fluid through a valve block and into one or more actuator cylinders. Each actuator is a double-acting cylinder -- hydraulic pressure extends the slide when entering the rod-side port and retracts it when entering the cap-side port. When an actuator fails internally (worn piston seals, scored bore) or externally (damaged rod, bent barrel), the slide may drift, refuse to move, or move only partially.
Replacing a failed actuator restores full hydraulic force to the slide room. This part covers the cylinder assembly only -- the hydraulic power unit, hoses, fittings, valve block, and slide room hardware are separate components.
Hydraulic actuator replacement requires depressurizing the slide hydraulic circuit before disconnecting any hose fittings. The hydraulic fluid circuit will need to be bled after installation to remove air and restore consistent slide travel. Use only hydraulic fluid specified by Lippert for LCI systems (typically AW32 or AW46 hydraulic oil -- verify in your coach service manual). Torque all hydraulic fittings to manufacturer specifications to prevent post-installation leaks.
Multiple actuator sizes are used across the LCI slide-out product line. Do not order based on coach model alone -- measure your existing actuator's overall length, stroke, and bore, and cross-reference the Lippert part number stamped or labeled on your current cylinder. This part is specifically for applications calling for the 35-7/16" / 24-1/2" stroke / 1-1/2" bore specification.