POWR Power unit5-37 69J3D112. Cut the surface of the valve seat with a45° cutter by turning the cutter clockwiseuntil the valve seat face has becomesmooth.a Slag or rough surfaceCAUTION:Do not over cut the valve seat. Be sure toturn the cutter evenly downward at a pres-sure of 40–50 N (4–5 kgf, 8.8–11 lbf) toprevent chatter marks.3. Use a 30° cutter to adjust the contactwidth of the top edge of the valve seat.b Previous contact width4. Use a 60° cutter to adjust the contactwidth of the bottom edge of the valveseat.b Previous contact width5. Use a 45° cutter to adjust the contactwidth of the valve seat to specification.b Previous contact widthc Specified contact width6. If the valve seat contact area is too wideand situated in the center of the valveface, use a 30° cutter to cut the top edgeof the valve seat, a 60° cutter to cut thebottom edge to center the area and setits width.Valve seat cutter holder:90890-06316Valve seat cutter:30° (intake and exhaust):90890-0632745° (intake and exhaust):90890-0632560° (intake and exhaust):90890-06324ÉS69J588030°S69J589060°S69J590045°
