Yanmar 3TNV82A-B Service Manual page 225

Crankshaft and Camshaft Components
5. Apply a light coat of clean engine oil to the
bearing cap bolts and tighten the bolts to the
specified torque in two stages (1/2 then full
torque). See Special Torque Chart on
page 6-25 for specifications.
(2)
Figure 6-138
6. Rotate the crankshaft to assure it turns freely.
7. Apply ThreeBond Liquid Gasket No. 1212,
Yanmar Part No. 977770-01212 to the mounting
flange of the seal housing (Figure 6-139, (2)).
8. Align the seal housing with the two dowel pins.
9. Reinstall seal housing and seal assembly.
10. Reinstall the flywheel (Figure 6-139, (1)) and
tighten the bolts to the specified torque. See
Special Torque Chart on page 6-25 for
specifications.
(1)
Figure 6-139
TNV DI Service Manual
(1)
(3)
0001752A
(2)
(3)
Installation of Pistons
IMPORTANT
Do not allow the connecting rod to contact
the crankshaft journal during piston
installation. Damage to the crankshaft
bearing journal may result.
1. Lubricate the piston, piston rings, and cylinder
with clean engine oil or assembly lubricant.
2. Rotate the crankshaft so the crankpin for the
piston being installed is near bottom dead
center.
IMPORTANT
Ensure the piston ring gaps are located
correctly (Figure 6-140).
(2)
1 – Top Compression Ring End Gap
2 – Second Compression Ring End Gap
3 – Oil Ring End Gap
Figure 6-140
3. Using a piston ring compressor, compress the
piston rings.
IMPORTANT
The piston and connecting rod must be
installed in the correct orientation. The
orientation of the piston to the cylinder is
different depending on engine model.
Piston Orientation to Cylinder - By Model
All TNV models - 82,
84(T), 88, 94, and 98(T)
ENGINE
(1)
(3)
Only TNV models - 106(T)
6-93