Yanmar 3TNV82A-B Service Manual page 216

ENGINE
Figure 6-115
7. Measure the outside diameter of the wrist pin in
three places and at 90° (Figure 6-116). See
Piston on page 6-16 for specifications. Record
the measurements.
Figure 6-116
8. Using a micrometer, measure the thickness of
each piston ring. See Piston on page 6-16 for
specifications. Record the measurements.
Notes:
• On an engine with low hours, the pistons,
piston rings and cylinders may be reused if they
are found to be within specifications.
• On an engine with high hours, the pistons rings
should be replaced and the cylinder honed
(see Honing and Boring on page 6-88) or
replaced. The piston should be replaced as
necessary.
9. Place each compression piston ring in the
groove as shown (Figure 6-117). Use a feeler
gauge to measure the clearance between the
piston ring and the piston ring land. Record the
measurements. See Piston Ring on page 6-18
for specifications. Replace the piston if not
within specification.
6-84
Crankshaft and Camshaft Components
0000237
0001889
Figure 6-117
TNV DI Service Manual
0001892