Zontes ZT310M 2022, Maintenance Manual

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Note: when the fit clearance between piston and cylinder block exceeds the maintenance limit value, please
evaluate and replace the parts with large wear and determine whether the fit clearance is within the
maintenance limit value. If yes, replace the corresponding
parts; if not, replace the new cylinder and piston.
5. Measure the inner diameter of small end of connecting rod.
Maintenance limit: 17.06 mm (0.6717 in)
Calculate the fit clearance between the small end of connecting rod and piston pin.
Standard value: 0.01-0.023 mm (0.0004-0.0009 in)
Maintenance limit value: 0.06 mm (0.0024 in)
Note: the fit clearance between the inner diameter of the
small end of the connecting rod and the outer diameter of
the sliding surface of the piston pin
When it is greater than the maintenance limit, please
evaluate and replace the parts with large wear,
Judge whether the fit clearance is within the maintenance
limit. If yes, replace the corresponding
If not, replace the new connecting rod and piston pin.