Hisun HS500ATV-2, Maintenance Manual

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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:
0.05 mm ， out of roundness: 0.005 mm
0.05mm taper ：0.005mm
Inspection of piston and piston ring
1. Measure the gap between piston ring and piston groove.
2. The first ring
3. The second ring
Note:It is forbidden to damaging the piston ring when
assembling.Check whether the piston and the piston
groove is cracked and abraded
.See figure 2-9.