I have a '71 Globetrotter with two double beds (that pull out from sofa benches), and the slide-out mechanism is two aluminum channels with plastic pieces between the two to make it slide easily. I need all new plastic pieces.
I have the same setup. I've been thinking about replacing them with the wood sliders after barking my shin on aluminum. You can probably find them either at Inland rv or out of doors mart.
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