Yanmar 3TNV82A-B Service Manual page 211

Crankshaft and Camshaft Components
IMPORTANT
Mark the connecting rod caps and
connecting rods so the caps and connecting
rods stay together.
(a) Remove the bearing cap. Do not remove the
bearing inserts at this time.
(b) Wipe oil from the bearing insert and
crankshaft journal surfaces.
(c) Place a piece of PLASTIGAGE
(Figure 6-101, (1)) along the full width of the
bearing insert.
Figure 6-101
IMPORTANT
Do not rotate the crankshaft when using
PLASTIGAGE. A false reading may result.
(d) Reinstall bearing cap and tighten to
specification. See Special Torque Chart on
page 6-25.
(e) Remove bearing cap.
(f) Compare the width of the flattened
PLASTIGAGE to the graduation marks on
the package (Figure 6-102, (1)). The mark
that most closely matches the width of the
flattened PLASTIGAGE will indicate the
bearing oil clearance.
Figure 6-102
TNV DI Service Manual
®
(1)
0001898
(1)
0001899
(g) Repeat with remaining connecting rods.
IMPORTANT
Do not allow the connecting rod to contact
the crankshaft journal during piston
removal. Damage to the bearing journal
may result.
3. Use a wooden dowel against the connecting
rod and tap the piston / connecting rod
assembly out of the cylinder.
4. Mark the cylinder number on the piston and
connecting rod.
5. Remove the bearing inserts (Figure 6-103, (2)).
6. Remove the compression rings
(Figure 6-103, (3)) from the piston using a
piston ring expander.
7. Remove the oil ring (Figure 6-103, (4)) from the
piston using a piston ring expander.
(5)
(9)
(8)
Figure 6-103
8. Remove the circlips (Figure 6-103, (5)) from
the wrist pin.
9. Remove the wrist pin (Figure 6-103, (6)) and
connecting rod (Figure 6-103, (8)) from the
piston (Figure 6-103, (9)).
10. Repeat the steps until all pistons are removed
and dissembled.
ENGINE
(3)
(4)
(6)
(5)
(7)
(2)
(1)
0001960
6-79