UXPW 125 ENGINE SERVICE MANUAL AND EFI DIAGNOSTIC
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5.4.5.
1. Assembly piston
When assembling piston, direct face with mark IN
towards intake side. Then assemble piston pin.
Apply appropriate amount of lube oil on piston pin,
piston pin hole, piston skirt before assembling.
Installing new piston ping circlip
Note
Place a clean cloth under the piston to guard
against circlip falling into crankcase. It is
forbidden to reuse circlip; otherwise, the engine
may be damaged. Piston pin circlip must be
installed to its place.
Split of circlip shall be alternated away from the
installing position on the piston. Split of circlip
must be kept downwards.
5.4.5.2. Install locating pin and new sealing gasket of
cylinder block.
Clean off engine oil from end face of crankcase before
installing paper gasket to avoid false cases of oil
leakage.
Note
Paper gasket of cylinder block is forbidden to
reuse. It must be replaced with a new one.
5.4.5.3. Install cylinder block,
Apply appropriate amount of lube oil evenly on
surface of cylinder block, piston and piston ring.
Note
Do not damage piston surface and cylinder
block.
Note
Do not damage piston surface and cylinder
block.
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