Hydraulic Leak 2017 Bighorn 3575EL

Short-Bed-Dually · Apr 3, 2021

I am in the process of installing a wired rear backup camera. When I pulled down the coroplast behind the RH wheels hydraulic fluid poured out. The dinette slide hydraulic cylinder in mounted in this area. I attached pictures of this area. The piston seal appears to have been leaking for a while, but this seems like a lot of fluid. The interesting thing is the fluid is in between the coroplast and the foil barrier more than on top of the foil barrier. I don't see where any lines are leaking. Has anyone else had this problem? Are these cylinders rebuildable or just need to replace?

RoadJunkie · Apr 4, 2021

I'm sure that when you call Lippert, they will tell you whether or not the seals are replaceable, as well as the repair/replacement details.

centerline · Apr 4, 2021

fully replaceable seals.... remove the cylinder, take the gland nut out of it, pull the rod out of the cylinder, remove the nut that holds the piston on the rod, remove the piston, and then slide the gland nut off the rod..... gently pick the seals out so they can be matched up, OR, have a new seal kit in hand before disassembling the cylinder from the coach..... reverse the procedure to put it all back together.....

after disconnecting the rod end from the slide unit, if the cylinder can drop down low enough so that the rod can slide out of it below the slideout unit, it could all be done without removing the entire cylinder from the trailer.....

a new cylinder will be about 500-600 dollars, a seal kit should be about $80, but if you source the seals at a seal store, they will be about $25..... once the cylinder is on the bench, it would take about 2 hours to rebuild and have ready for reinstall...

Hydraulic Leak 2017 Bighorn 3575EL

Short-Bed-Dually

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RoadJunkie

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centerline

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