Reassembly Of Crankshaft And Piston Components - Yanmar 3TNV82A Service Manual

ENGINE
• When honing is completed, wash the cylinder
block with hot water and soap. The cylinder wall
is adequately cleaned when a white rag wiped
in cylinder comes out clean. Use brushes to
clean all passages and crevices. Rinse with hot
water and dry with compressed air. Apply clean
engine oil to all steel surfaces to prevent
rusting.
Reassembly of Crankshaft and
Piston Components
Notes:
• Proceed slowly. Make no forced assemblies
unless a pressing operation is called for. All
parts must be perfectly clean and lightly
lubricated when assembled.
• Use new gaskets, seals and O-rings during
assembly.
• Liberally apply clean engine oil to all internal
parts during assembly.
• All fasteners should be tightened to a given
torque. If a special torque is not provided in the
Special Torque Chart on page 6-23, tighten to
standard torque specifications. See Tightening
Torques for Standard Bolts and Nuts on
page 4-47.
Reassembly of Pistons
1. Select the parts needed to reassemble the
piston and connecting rod for one cylinder.
2. If removed, install a new wrist pin bushing
(Figure 6-127, (7)) using a press and the
appropriate service tool. Be sure to align the oil
holes.
6-84
Crankshaft and Camshaft Components
(5)
(9)
(8)
Figure 6-127
3. Reinstall one circlip (Figure 6-127, (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
identification mark (Figure 6-128, (1))
stamped into the top of the piston will be on
the same side of the connecting rod as the
match marks (Figure 6-128, (3)) stamped
into the connecting rod and connecting rod
cap. When installed in the cylinder, the
embossed mark (Figure 6-128, (2)) cast
into the beam of connecting rod will face the
flywheel end of the engine.
Note: The actual appearance of the match
marks will vary but they will always be in
the same locations.
TNV DI Service Manual
(3)
(4)
(6)
(5)
(7)
(2)
(1)
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