Rato R80, Руководство по обслуживанию, Страница: 61 / 79

Part IV Disassembly and Maintenance
57
Standard Maintenance limit
See Tab. 1-3 See Tab. 1-3
e) Slightly grind by 45° grinder to remove any burr on the edge of valve seat.
f) After reshaping the valve seat, check the width of valve seat. Use only the colorant on valve
cone face, insert the valve and press the valve several times with effort, but ensure that the
valve does not rotate on the valve seat. If the valve seat cone face is evenly stained with
colorant, as shown in the figure, it means that the valve is in good contact with the valve seat
cone face.
g) Apply abrasive to valve seat cone surface, and rotate valve grinding tool to grind the valve
seat.
h) Check valve clearance after assembly.
0.8mm
Valve grinding
tool