Chapter V Disassembly & Repair
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Check
Outer diameter of piston pin
Standard
Maintenance Limit
16.992~16.998 mm 16.95 mm
Inner diameter of cylinder
Measure the three points on X and Y axes and record the inner
diameter of the cylinder (X axis is perpendicular to crankshaft
while Y axis is parallel to crankshaft).
Take the maximum reading as the wear and conical degree of
the cylinder.
Model Standard
Maintenance Limit
LC2P73F 73~73.01 mm 73.1 mm
LC2P76F 76.0~76.01 mm 76.1 mm
Detection of piston and piston ring
Check the contact between piston and cylinder, defects of ring groove, erosion at the top, crack, etc. It shall be
replaced for severe damages (e.g. crack).
Remove carbon deposition
Carbon deposition accumulates at the edge of the top of piston and upper opening of cylinder. Remove carbon
deposition prior to detection. Wet the carbon deposition with kerosene, and then remove it with blunt scraper or
metallic brush.
Outer diameter of piston skirt
Measure and record the outer diameter of piston skirt at the
place 10 mm away from the maximum lower edge of the
piston skirt; the measuring direction is perpendicular to the
piston pin hole.
Model Standard
Maintenance Limit
LC2P73F 72.965~72.975 mm 72.755 mm
LC2P76F 75.965~75.975 mm 75.755 mm
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