Yanmar 3TNV82A-B Service Manual page 223

Crankshaft and Camshaft Components
Piston Assembly - Only TNV models 106(T)
When correctly assembled, the identification mark
(Figure 6-133, (2)) stamped into the top of the
piston will be on the opposite side of the connecting
rod as the match marks (Figure 6-133, (4))
stamped into the connecting rod and connecting
rod cap.
When installed in the cylinder, the piston
identification mark (Figure 6-133, (2)) stamped on
the top of the piston must face the camshaft side
(Figure 6-133, (6)) of the engine and the
embossed mark on the connecting rod
(Figure 6-133, (3)) must face the flywheel end
(Figure 6-133, (5)) of the engine.
(6)
(2)
1 – Fuel Injection Pump Side of Engine
2 – Piston Identification Mark
3 – Embossed Mark on Connecting Rod
4 – Rod and Cap Match Marks
5 – Flywheel End of Engine
6 – Camshaft Side of Engine
Figure 6-133
1. Lubricate and reinstall the wrist pin
(Figure 6-134, (3)) through the piston and
connecting rod.
2. Reinstall the second circlip (Figure 6-134, (4))
and ensure it is securely seated in the groove.
TNV DI Service Manual
(1)
(5)
(3)
(4)
0001967A
(5)
(9)
(8)
Figure 6-134
Note: If installing new piston rings the end gap
must be checked and adjusted as
necessary. See Inspection of Pistons,
Piston Rings and Wrist Pin on page 6-83
for specifications. Use a piston ring end
gap filing tool to adjust the piston ring
end gap on new piston rings.
Note: Reinstall the top and second piston rings
with the stamped "makers mark"
(Figure 6-135, (1)) facing the top of the
piston. The "makers mark" may vary in
appearance but will always be located on
the top surface of the piston ring
adjacent to the piston ring gap. The oil
ring and oil ring expander can be
installed either side up.
Figure 6-135
ENGINE
(3)
(4)
(6)
(5)
(7)
(2)
(1)
0001960
(1)
0000225A
6-91