Remachining basic bore for valve seat rings 01.8 352/352 A Remachining basic bore Clamp tool in slide rest. 2 Introduce pilot into valve guide until stop on slotted rod rests on valve guide. If necessary, force slotted rod downwards using screwdriver. Tighten with drift, introducing into pilot from above and be- low. 3 Release lock-nut (1), moisten pilot with oil, slip cutter over pilot, turn quick·action adjusting screw (2) until tool moves horizontally beyond bore, and then slide cutter downwards until tool rests on cy- linder head. Important: Fit tools carefully so as not to damage carbide tip.
4 Release locking screw (1), force pilot support (2) downwards until it contacts pilot, and then re- tighten locking screw (1). S Turning the knurled collar serves to adjust tool height to point where it is just clear. 6 Lock floating guide horizontally with aid of steady clamp, making sure to set working depth be· tween adjusting ring and floating guide. See 1.2/4 for working depth. UKD 30 402 21 424)1 6.5/1.