LONCIN LC2V80FD Maintenance Manual page 60

Chapter V Disassembly & Repair
Check
Installation check of oil pump
1、 Rotational flexibility of rotator: coat lubricating oil onto
rotator and axis prior to assembly; manually rotate the rotational
axis after assembly to assure no binding in rotation process.
2、 Pumping of oil pump: after assembly, add certain engine oil at
the filter screen of the oil inlet for the oil pump, manually rotate
the gear of oil pump to assure the oil pump can pump oil, otherwise,
re-assemble or replace the oil pump.
Outer diameter of piston pin
Standard
16.992-16.998 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.
Standard
80.0-80.01 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.
Maintenance Limit
16.9 mm
Maintenance Limit
80.15 mm
- 56 -
Outer rotor
Inner rotor Sealing ring
Oil pump
driven wheel