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diagnosing and eliminating of malfunction:
● Emission of black smoke for abrasion of cylinder or
piston,
1. Cylinder , piston of piston ring is worn out.
2.The piston ring is not properly assembled.
3. The piston or cylinder wall is scraped.
● overheated
1、Excessive incrustation of piston.
2、Blast and abnormal noise.
3、Abrasion of cylinder or piston.
Inspection of cylinder.
1.Check whether the cylinder is damaged.
2.Measure the bore diameter of cylinder at three spots.
3.At the top,the middle and the bottom of the piston stroke .And measure
the bore diameter at directions of right-angle intersection.
repairing limit value:
out of roundness: 0.005 mm
taper ：0.005mm
Inspection of piston and piston ring
Measure the gap between piston ring and piston groove.
1.unplug the piston ring;
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