Hisun HS700UTV-4 Maintenance Handbook page 165

ENGINE
1、CHECK
1).Checking the cylinder and piston
• cylinder and piston walls Vertical
scratches
and the piston.
2).Checking the piston rings
• piston ring
(Insert in cylinder piston ring will be ① ,and
measure the end gap.)
1NOTE:
Check whether the piston and the piston
groove is cracked and abraded.
3).Checking the piston pin
• piston pin
Blue discoloration/grooves
check the lubrication system.
2、MEASURE
• At the top, the middle and the bottom of the
piston stroke.
1NOTE:
Measure the bore diameter at directions of
right-angle intersection.
Repairing limit value
Out of roundness:0.005mm
Taper:0.005mm
• The external diameter 10mm above the bottom
of the piston skirt.
1NOTE:
Repair limit on the clearance between the
piston and cylinder.
Repairing limit value
0.1mm
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Rebore or replace the cylinder
Replace, then