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Disassembly of the piston
Use needle-nose pliers to remove the piston pin
retaining ring and remove the piston pin and piston.
Notice:
When removing the piston pin retaining ring,
do not drop the retaining ring into the
crankcase
Inspection of pistons and piston
rings
1. Remove the piston ring;
2. Measure the gap between the piston ring and
the groove of the piston ring, and the maintenance
limit value:
The first ring: 0.08mm
Second Ring: 0.08 mm
Oil ring: 0.08 mm
3. Check whether the piston is worn or cracked,
and whether the groove of the piston ring is worn.
4. Insert the piston ring into the cylinder, and then
measure the closed gap of the piston ring.
Repair limit:
The first ring: 0.5mm
Second ring: 0.5mm
Oil ring: 1.4 mm
