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Measure the thickness of friction plate with a vernier
caliper.
Allowable limit: Replace it when below 2.5mm.
Check the flatness of the driven friction plate with
the plug gauge.
Allowable limit: Replace it if above 0.2mm.
measure the thickness of the surface needle roller
bearing.
Allowable limit: Replace it when it is below 1.8
mm.
Thickness
Plug gauge
Driven friction