coldlight sourceoil level:Oil-freeringof rolling bearings,theoil shouldnot be less thantheballcenter;oilringbearings,oil levelshould be able toburyBaptistfifthofthediameteroftheoil ring.In order to monitortheoil levelonthebearingwithoil leveloroil standard. coldlight sourceoilsituation:notthe waterinto theimpurities,notemulsifiedorblack. coldlight sourcehasadifferenttone:especially therolling bearing,thedamagewill usually beabnormalsound. acoldlight sourceshould pay attention toin the operation,thebearingis working properly Thecoldlightsourceoil temperature:Do not exceed60℃.