Check and maintain
1. Cylinder cover
1.1 Combustion chamber surface of cylinder cover
Disassemble fuel injector、inlet valve and exhaust valve, clean the surface of combustion
chamber and see whether there is any crack or other damage. Use smear infiltration to check
minute crack.
1.2 Inlet/exhaust valve seat
(1) Clean cylinder cover、valve and valve sealing cone, insert valve into valve pipe, measure
valve sunk mete with deep vernier caliper, refer to picture 33. If the valve sunken mete or valve
ring width exceeds much, please adjust it by changing valve or valve seat gasket.
Table 6 Valve sunken mete
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