Joined: Jul 2015
Posts: 7,340
Likes: 3,200
From: NW Oregon
Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike
your headset is, almost assuredly, a sealed (cartridge) bearing type, and no set maint. schedule exists for them... if it begins to get rough, you replace the bearings, and possibly the entire headset, as needed.