Stabilizer Jack Troubleshooting For 2018 Grand Design Solitude Fifth Wheel.

Updated 02/22/2022 | Published 02/21/2022

Question:

Hello, I have a 2018 GD Solitude 375RES. This just started today. The LT rear hydraulic stabilizer jack extends while towing. Thanks

asked by: Kenneth R

Expert Reply:

Ok for hydraulic jacks that have a mind of their own you will need to do a bypass test first.

Retract jack in question. If retracting hydraulic landing gear, HLG, both jacks will retract. If retracting leveling jack, all jacks will retract.

Once jack is fully retracted, remove the extend hose (hose located at the top of the jack). If testing
ROAD SIDE HLG or REAR STAB JACKS, the hose will be mounted to a red restricted flow valve block.

At this point DO NOT attempt to extend the jacks. You will cause rapid fluid loss in the system.

When the hose is removed, push the RETRACT button again.

A. If fluid comes from the jack while the retract button is being pressed, the hydraulic cylinder
is bypassing the internal seal and must be replaced.
B. If no fluid comes from the cylinder during this retract procedure, the cylinder is good.
C. If no fluid comes from the JACK but does come from the HOSE, test the opposite jack (HLG and
Rear Stabs only).

Make sure you reconnect and tighten the EXTEND hose.

This test will work for any Hydraulic Landing Gear, Rear Stab Jacks or Leveling Jacks like Lippert Replacement Level Up Hydraulic Jack - 8,000 lbs - 15" Travel # LC26FR for example.