PGO G-MAX 50 Service Manual page 117

E.Installing Cylinder and piston
a.Installing piston and piston rings
1.Lubricate the piston rings by motor oil.
NOTICE:
a.Be careful not to scratch the piston
and not to break the piston ring.
b.The mark (on the ring) should be
upward when installing.
c.after installing, the ring should be
smoothly rotated.
2.Clean up the residual gasket on the
crankcase.
NOTICE:
Do not drop other objects into the crankcase.
3.Assembly the piston, piston pin and piston pin
clip.
NOTICE:
a.The mark "IN" on the piston tip should face
to the INLET side.
b.Do not drop the piston pin clip into the
crankcase and to clog the crankcase with rags.
b.Installing piston
1.Fix the lock pin and gasket on the crankcase.
2.Lubricate the Cylinder inner surface, piston and piston rings by Motor Oil.
3.Install the piston ring into the cylinder carefully.
NOTICE:
a.The piston ring cannot be damaged or cracked.
b.The cutting section of three rings must be arranged at intervals of 120°