Power gear has a manual available on their web site covering most of their slides. It is 111 pages long, and it contains that diagram that you reference.
I recently had to adjust my slide, and someone on this forum pointed out that (at least on my motorhome) there are slide adjustment screws in the ceiling of the storage bays (which is beneath the floor of the motorhome). The adjustments are covered with a plastic housing. My adjustments were inside the plastic housing, and were bolt heads about 9/16 inch size, with the bolts being anchored with washer tabs bent against the flats of the bolt heads.
Without that tip to look inside the plastic housings in the ceiling of the storage bay, I'd still be looking for those adjustments.
Also keep in mind that the power gear diagrams will only describe the rollers supplied by power gear. About 50% of the rollers are supplied by the coach manufacturer, and are not described in the power gear documents.
I also have some slide roller adjustments inside some cabinets above the floor (kitchen cabinets).
Maybe this will help you find your slide adjustments.
Fred
Fred & Vicki
St. Augustine, Florida