Doosan DX60R Shop Manual page 330

Piston Assembly - 4TNV98-E
When correctly assembled, the piston identification mark
(2, Figure 212) stamped into the top of the piston will be
on the same side of the connecting rod as the match
marks (4, Figure 212) stamped into the connecting rod
and connecting rod cap.
When installed in the cylinder, the piston identification
mark (2, Figure 212) stamped on the top of the piston
must face the fuel injection pump side (1, Figure 212) of
the engine and the embossed mark on the connecting rod
(3, Figure 212) must face the flywheel end (5, Figure 212)
of the engine.
Reference
Number
1
2
3
4
5
6
1. Lubricate and reinstall the wrist pin (3, Figure 210) through
the piston and connecting rod.
2. Reinstall the second circlip (4, Figure 210) and ensure it is
securely seated in the groove.
NOTE:
If installing new piston rings the end gap must
be checked and adjusted as necessary. (See
page -142) 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" (1, Figure 213)
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.
Always use a piston ring installation tool (expander)
when installing piston rings. Never attempt to install
piston rings by hand.
Engine
Page 150
Description
Fuel Injection Pump Side of Engine
Piston Identification Mark
Embossed Mark on Connecting Rod
Rod and Cap Match Marks
Flywheel End of Engine
Camshaft Side of Engine
IMPORTANT
6
5
Figure 212
Figure 213
1
2
3
4
FG008960
SP001693