Yanmar 2TNV70 Service Manual page 139

Cylinder Block
Reassembly of Pistons
1. Select the parts needed to assemble the piston
and connecting rod for one cylinder.
2. If removed, install a new wrist pin bushing
(Figure 6-83, (7)) using a press and the
appropriate service tool. Be sure to align the oil
holes.
(5)
(9)
(8)
Figure 6-83
3. Reinstall one circlip (Figure 6-83, (5)) into the
piston. Ensure the circlip is securely seated in
the groove.
IMPORTANT
The piston and connecting rod must be
assembled with the correct orientation.
When correctly assembled, the piston
identification mark (Figure 6-84, (1))
stamped into the top of the piston will be on
the opposite side of the connecting rod as
the match marks (Figure 6-84, (3))
stamped into the connecting rod and
connecting rod cap. When reinstalled in the
cylinder, the embossed mark
(Figure 6-84, (2)) cast into the beam of
connecting rod will face the flywheel end of
the engine.
TNV IDI Service Manual
(3)
(4)
(6)
(5)
(7)
(2)
(1)
0001705A
Note: The actual appearance of the match
marks will vary but they will always be in
the same locations.
(1)
(3)
Figure 6-84
4. Place the connecting rod into the piston. The
match marks (Figure 6-85, (4)) on the
connecting rod and cap must be on the
opposite side as the piston identification mark
(Figure 6-85, (2)) on the top of the piston.
ENGINE
0002464
(2)
0002090
0002089
6-53