Page 17 of the extra quality manual mentions a "food-grade silicone grease" for the drive shaft.
Since digital PDF downloads for this specific vintage model are difficult to find on the official site, you can purchase "extra quality" physical reprints from the following retailers: : Offers a WS0797 Instruction Manual Reprint professionally printed on 22lb paper. eBay : Sellers like Steve's Picks
If you own a WS-0797, the is essential because standard bread machine instructions will produce under-kneaded, uneven results due to the unique dual-heater and retractable paddle design.
🍞 Finally Found It! High-Quality Manual for the Williams Sonoma WS-0797