80 MAINTENANCE AND ADJUSTMENT
j
•
Remove the piston by p
ushing the piston pin out
thesidefromwhichthesnapringwasremoved.
Use a piston pin puller assembly (special tool:
57001-910), if the p
in is tig ht.
A. Piston Pin Puller Assembly (Special Tool:
57001-910)
Piston Ring Removal
•
Carefully spread the ring opening with your
thumbs and then push up on the opposite side of
theringtoremoveit.
A. Piston Ring
Piston Ring/Rin
g Groove Clearance Inspection
•
Visually inspect the piston ring and the piston ring
groove.
•
If the ring is w orn unevenly or damaged, it must
be replaced.
•
If the piston ring groove is worn unevenly or dam-
aged, the piston must be replaced and fitted with
a new ring.
•
Check for uneven the piston ring groove wear by
inspecting
theringseating.
•
The ring should fit per fectly parallel to the groove
surface. If not, replace the piston and the piston
ring.
•
Withthepistonringinitsgroove,makeseveral
measurements with a thickness gauge to deter-
mine pis
ton ring/ring groove clearance.