Yanmar 1GM10, Руководство по ремонту

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MULTICYLINDER ENGINES 115
Bore
block
2. Measure the cylinder bore diameter at several points
with a bore gauge (Figure 32, typical). Figure 33 shows
the points of normal cylinder wear. If dimension
A ex-
ceeds dimension
B
by more than 0.02 (0.0008 in.),
the cylinder and install a new assembly.
3. If the cylinder bore is damaged or excessively worn,
the cylinder bore and install a new piston. If the
piston is worn, but the cylinder bore is good, install a new
piston.
NOTE
Obtain the new piston and have it available
so the machine shop can bore the cylinder to
the correct oversize dimension.
Piston Ring
1. Check the ring gap of each piston ring. To do this, posi-
tion the ring at the bottom of the ring travel area and
square it by tapping gently with an inverted piston. See
Figure 34.
NOTE
cylinder has not been check
the gap at the bottom of the ring travel,
where the cylinder is least worn.