30
Remove piston
Remove circlip of piston pin by pliers
Caution: No circlip drop into crankcase is allowed
Press piston pin out of piston, and then remove
the piston.
Piston/Piston rings’ check
Measure clearance between piston rings and their
grooves by thickness gauge A.
Standard data：
1
st
ring：0.02～0.06
2
nd
ring：0.02～0.06
Limit data：
1
st
, 2
nd
ring：0.16
Remove piston ring
Caution：No damage to piston rings
during disassembling is allowed
Insert each piston ring into cylinder and measure
clearance.
Standard data：
1
st
ring：0.15～0.3
2
nd
ring：0.20～0.35
Limit data in maintenance：
1
st
ring：0.65
2
nd
ring：0.7
Check abrasion or damage on piston and
its grooves.
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