Compress valve spring with a valve spring compressor, and remove the valve collet,
Remove in sequence spring disc, external and inner valve springs, external valve spring washer and valve.
12.3.2 Disassemble Valve
12.4 Valve Inspection
Clean carbon deposition on the cylinder cover.
Measure flatness of junction surface of cylinder cover
Allowable limit: 0.05mm.
If flatness of junction surface of cylinder cover exceeds the
service limit, put a piece of fine sandpaper on the flat plate and
fit the sandpaper with junction surface of cylinder cover; and
then push the sandpaper to grind in figure of “8” way.
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