Rato R80, Maintenance Manual, Page: 65 / 79

Part IV Disassembly and Maintenance
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c) Connecting rod cover
Align connecting rod with the edge of the connecting rod cover when assembling.
②
Piston inspection
Inspect the contact between the piston and cylinder, ring groove defect, top ablation and
cracking, etc. If it is seriously damaged, such as broken, it shall be replaced.
Remove carbon deposits
Carbon deposit is accumulated on the top of piston and the edge of upper port of the cylinder.
Carbon deposits shall be cleared up before the inspection. Soak the carbon deposit with
kerosene first, and then remove it with a blunt scraper or metal brush.
a) Outer diameter of piston skirt
Measure the outer diameter of the piston skirt by outer diameter micrometer, to replace it if it
exceeds the service limit.
Snap ring of
piston pin
Notch
Alignment mark