How Do You Fix a Sagging RV Slide Out?
Use the stabilizers precisely without putting any undue pressure on them as it will add to the strain on the slide out mechanism.
Also, do keep in mind that stabilizers are not meant to handle loads, they merely add what the name suggests- support. All you need to do is gently place the slide out stabilizer under the rail and engage the folding handle to slowly raise the bracket to meet the slide out bars to afford maximum support.
Always begin the process from the lowest setting. And, keep in mind you may need to use wooden blocks to augment the support for extended use.