Rato R2000IS, Maintenance Manual, Page: 42 / 64

APPENDIX
35
b) The clearance of piston pin hole and piston pin
With inside diameter micrometer to measure the piston pin hole diameter, and outside
micrometer to measure the piston pin outer diameter .Then calculated by the measured
results. If it beyond the limit, you can change the piston or piston pin with your own need.
Standard Using limit
11.002~11.01mm 11.02mm
b) Piston- Cylinder gap
The biggest diameter of the cylinder minus the piston skirt diameter
Be tested the gap before and after repairing.
When you checking, the inverted piston should be in the cylinder, put the appropriate
thickness gauge on the pressure surface between the cylinder wall and piston skirt, and then
take out feeler gauge, if you feel some certain resistance, but you also can smooth out, that is
clearance between the piston and cylinder.
Standard Using limit
0.01~0.045 mm 0.135 mm
c) The gap of piston ring side
Piston ring should be free rotation, neither loose nor sluggish acerbity. Then insert ring
and groove in the plane of the upper and lower clearance with a feeler gauge in the
measurement
Note
d