The Lippert 354178 is a direct-replacement hydraulic actuator engineered for LCI (Lippert Components) slide-out room systems. At 41-5/8" overall length with a 30" stroke and 1-1/2" bore, this aluminum-body actuator delivers the smooth, consistent extension and retraction that hydraulic systems are known for -- faster cycle times and more pushing force than comparable electric rack-and-pinion setups, with fewer moving parts exposed to road vibration.
When a hydraulic actuator starts leaking, moves sluggishly, or fails to hold the room fully extended, the fix is a direct OEM-spec replacement -- not a workaround. The Lippert 354178 restores your slide-out to factory performance using the same bore size, stroke length, and overall dimensions as the original unit.
Hydraulic slide-out systems on LCI-equipped coaches use a central pump and fluid reservoir to drive one or more actuators simultaneously. This actuator is the mechanical component that physically pushes and pulls the room -- making bore size and stroke length critical fitment dimensions. Swapping in a unit with the correct 30" stroke and 1-1/2" bore ensures proper travel distance and fluid displacement matching your pump's output.
Lightweight aluminum body reduces unsprung weight versus steel alternatives while resisting the corrosion common in undercarriage environments.
Provides the full room travel distance required by LCI systems specifying this actuator. Correct stroke prevents bottoming out or short-travel binding.
Bore diameter determines fluid volume per cycle and push/pull force. Match this spec exactly to your OEM actuator for consistent pump performance.
Engineered by Lippert to replace the original 354178 unit without modification to hydraulic lines, mounting brackets, or room framing.
Many mid-range and high-end fifth wheels and travel trailers use LCI hydraulic slide systems because they generate significantly more force than electric motors -- useful for heavier slide rooms or rooms with furniture. Hydraulic systems also tend to level the room during movement, reducing seal wear. The trade-off is that the system requires hydraulic fluid and a functional pump; if the pump is the issue, replacing the actuator alone will not resolve the problem. Diagnose the pump, fluid level, and solenoid valves before ordering a replacement actuator.
Replacing a hydraulic slide actuator is a moderately advanced DIY job. You will need to:
This actuator is backed by Lippert's limited 1-year manufacturer warranty against defects in materials and workmanship. Retain your purchase receipt as proof of purchase for any warranty claim.