Direct-replacement hydraulic cylinder for Lippert hydraulic slide-out systems. With a 38-inch stroke, 1.5-inch bore, and 3/4"-10 threaded ends on both sides, this cylinder is a common service part for coaches equipped with Lippert's hydraulic room extension systems. If your slide-out is moving slowly, leaking down, or not extending fully, a worn cylinder is often the culprit.
Lippert hydraulic slide-out systems use double-acting hydraulic cylinders to push and retract room extensions under high load. The 342328 is one of the most commonly serviced cylinders in this family, sized for longer slide-out rooms that require a full 38-inch stroke to reach full extension.
When fully retracted, the cylinder measures 53 inches tip to tip. At full extension it reaches 91 inches. Thread interfaces on both ends are 3/4"-10 UNC, which is the standard connection used throughout Lippert's hydraulic slide hardware ecosystem.
Full 38-inch working stroke for longer slide-out rooms that require extended travel.
1.5-inch bore diameter delivers the pushing force needed to move heavy slide-out rooms under load.
Both rod end and cap end use 3/4"-10 UNC threads -- standard for Lippert hydraulic slide hardware.
Designed as a drop-in service replacement for worn or leaking cylinders in existing Lippert hydraulic slide systems.
Hydraulic cylinders are sized by three measurements: bore diameter, stroke length, and retracted length. Before ordering, confirm all three match your existing cylinder. The 342328 is:
If your retracted length or bore does not match, Lippert offers other cylinder part numbers for different slide-out configurations. Ordering the wrong stroke length is the most common installation mistake -- measure the old cylinder before removing it from the coach if possible.
Lippert hydraulic slide systems use a central power unit (HPU) -- typically mounted in a basement bay -- to pressurize fluid to individual cylinders at each slide-out room. The cylinders are double-acting, meaning pressurized fluid both extends and retracts the room. When a cylinder seal wears out, it allows internal bypass, causing the room to drift in over time or fail to hold position.
Replacing a failed cylinder restores full holding force and consistent room travel. Always bleed the hydraulic system and check fluid level after cylinder replacement.
Hydraulic Operation Fluid Recommendation
Hydraulic Cylinder Test
Cylinder Testing For Slide Units
Extend And Retract Cylinder Port Locations
Changing A Slideout Cylinder