Never stop the slide at any point, always allow it to travel to full open or full close, even leave the button pressed for 5 seconds after it stops. This will keep your motors synchronized. The crunching noise could be because slide is not moving evenly, so make sure it is even on both sides when opened or closed. Sometimes when the motors get out of sync one side is not even. Also get a flashlight and watch the slide as it moves to make sure something isn't getting crunched in the support rollers. If you don't see anything and the sides are even, then it may just be noises your slide makes in operation. They all make unique sounds, getting familar with the sound will help you know when something is not sounding as usual. You also need to lubricate the slide, there are many youtube videos on the operation and maintenance of Lippert/Schwintek slides to help get educated.
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2014 LTV Unity Murphy Bed
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