30/ENGINE - WORK ON INDIVIDUAL PARTS
64
300809-11
–
Mount drive gear
.
16.7
Checking/measuring the cylinder
300820-10
–
Check the cylinder bearing surface for damage.
» If the cylinder bearing surface is damaged:
–
Change the cylinder and piston.
–
Measure the cylinder diameter at several locations on the
and
axes using a
micrometer to check for oval wear.
Guideline
Cylinder - bore diameter
Size A
45.025… 45.037 mm (1.77263…
1.77311 in)
Size B
45.037… 45.050 mm (1.77311…
1.77362 in)
300819-10
–
The cylinder size
is labeled on the side of the cylinder.
16.8
Checking/measuring the piston
300821-10
–
Check the piston bearing surface for damage.
» If the piston bearing surface is damaged:
–
Change the piston and, if necessary, the cylinder.
–
Check that the piston ring moves smoothly in the piston ring groove.
» If the piston ring is stiff:
–
Clean the piston ring groove.
Tip
Use an old piston ring to clean the piston ring groove.
–
Check the piston ring for damage.
» If the piston ring is damaged:
–
Change the piston ring.
–
Check the piston ring anti-rotation lock for damage and to ensure that it is firmly
seated.
» If the piston ring anti-rotation lock is damaged or loose:
–
Change the piston.
–
Check the piston pin for discoloration or signs of wear.
» If the piston pin has strong discoloration/signs of wear:
–
Change the piston pin with the piston pin bearing.
–
Check the piston pin bearing for damage and wear.
» If there is damage or wear:
–
Change the piston pin bearing and connecting rod, if necessary.
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