Wow, that is catastrophic faliure! After having it fixed once and and then it breaks again must be frustrating.
My slides have a Powergear system. The slide is bolted to the two (front and rear)slide geared rail on the outer edge These rails are the main supports fro the slide. Had the slides adjusted in July as they were low when closed. Right now, the slides tilt to the outside when starting to close and the kitchen/galley slide rides on the tile floor and front rug as it comes in. Once in all the way it seats itself against the slide outer seals. When all the way out, it lifts up into place by the actuator rail when it hits the lower outer seal and the actuator forces the outer edge up until it seats it self on the top inner slide seal.
Obviously, I don't know your specific system. On mine the only way for the slide to slide out by itself is if the motor gear shear pin breaks. The two rails have a "driveshaft" across the top of the storage bays that connect the front and rear actuator motors. The way it is setup, either the front or rear motor will drive both actuator rails in and out.
Try emailing Powergear and see what their techs can offer. I contacted them when I found my slide rub strips missing and they responded the next day.
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Duane
2005 National Tropical w/Cat 350
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