Chapter IV Disassembly & Repair
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8) Clearance between piston pin hole and piston pin
Measure the inner diameter of piston pin hole and the outer diameter of piston pin with inside micrometer and outside
micrometer. Then calculate the clearance value based on the measured result. Replace the piston or piston pin if it
exceeds the use limit.
Standard
Maintenance Limit
0.002-0.014 mm
0.06 mm
9) Inner diameter of cylinder
Standard
Maintenance Limit
70 mm
70.165 mm
Detection of connecting rod
The connecting rod shall be scrapped to change a new one when it is bent, warped, or the out ring of its bearing bush
in big end and the shaft sleeve in the small end is moving, or has crack.
1) Inner diameter of the small end of connecting rod
Replace the connecting rod if the inner diameter is less or more
than maintenance limit.
Standard
Maintenance Limit
18.002 mm
18.07 mm
2) Detect the inner diameter of big end
Replace the connecting rod if the inner diameter is less or more
than maintenance limit.
Standard
Maintenance Limit
30.02 mm
30.066 mm