Troubleshooting Slide Out Creep With A Lippert Hydraulic Slide Out System

Updated 12/15/2025 | Published 11/11/2024

Products Featured in This Question

Lippert Replacement Hydraulic Power Unit with 2-Quart Pump Reservoir Kit for RV Slide-Out IRC System

(17)

$1375.94

Lippert Replacement Hydac Cartridge Valve for RV Slide-Out Hydraulic Pump

(14)

$132.20

Question:

have a older trailer with lippert hydraulic power unit in it i run the rooms out one button two slides after a day or two one slide will come out about 6 inches or more what can i do to fix is there a valve bad in pump

asked by: Terry

Expert Reply:

Hey Terry,

Hydraulic slide out creep can happen for a number of reasons, with some of the more common reasons being a bad valve or seal, damage to the cylinder, a bad solenoid valve, or air in the lines. I would start by running the slide out in and out 5 times. This will help purge any air in the lines and then you can start checking for fluid leaks. If you find no leaks then I would then go to the pump and check the solenoid valve # LC177094 for that slide out.

The slides can not move unless the fluid is leaking somewhere so the valve might be bad and allowing fluid to leak back into the reservoir slowly. I would use a hex key to open the valve (clockwise) about 1 full turn to open the valve and then back counter-clockwise to close the valve back up. If something was preventing a good seal then this could help fix it. If it continues to creep either the valve will need to be replaced or you'll need to disconnect the cylinder and check it for damage and internal leaking/replace it. Let me know what you find and we can keep troubleshooting.

expert reply by: Kevin C

Bud M.

12/15/2025

Hey Terry, how did things go after you cycled the slides and checked the solenoid valve on your Lippert hydraulic power unit? Did that help stop the slide from creeping out? Your update could make it easier for the next person with the same issue.