Zontes ZT310M 2022, Руководство по обслуживанию

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2. Use the piston to push the piston ring firmly into the cylinder, and use the plug gauge to measure the end clearance.
Maintenance limit value:
First ring: 0.50 mm (0.0197 in)
Second ring: 0.85 mm (0.0335in)
3. Check whether the outer surface of the piston is scratched or otherwise damaged. Measure the inner diameter of
piston pin hole and take the maximum reading to judge the inner diameter.
Maintenance limit: 17.038 mm (0.6708 in)
Measure the outside diameter of the piston pin between the piston pin and the sliding surface of the connecting rod.
Maintenance limit: 16.975 mm (0.6683 in)
Calculate the clearance between the inner diameter of the piston pin hole and the outer diameter of the piston pin.
Standard value: 0.002-0.014 mm
Note: when the fit clearance between the piston pin hole and the piston pin exceeds the standard value,
please evaluate and replace the parts with large wear,
Judge whether the fit clearance is within the maintenance limit. If yes, replace the corresponding parts. If no,
replace the new piston pin and piston.
4. Measure the outer diameter of the piston at 8mm (0.3150 in) from the bottom of the piston and 90 ° perpendicular to
the piston pin hole.
Maintenance limit: 71.90 mm (2.831 in)
Calculate the fit clearance between cylinder and piston.
Maintenance limit: 0.15 mm (0.0059 in)
Piston ring
Plug gauge
Piston ring