The manual says to fill with oil during reassembly. Should it be filled completely with oil? Or just enough to lubricate it? If it is filled completely before the retainer clip is put in it hydraulically locks so it can’t be depressed to align the holes. Insert holding pin then retainer clip.. at this point the seat can still be depressed... is oil added until the seat can not be depressed any more? Any advice is appreciated, I don’t want to mess this step up..