Piston And Piston Ring - Robin DY23-2D Service Manual

5 - 4- 2 PISTON AND PISTON RING
(1) If the piston ring expander is unavailable, install the piston rings
by
placing the
open
ends over the top land of the piston and spreading the ring ends only far enough
to slip them into the correct ring grooves.
1. Pay attention not t o break the piston ring by twisting.
2. Install the oil ring first followed
by the second ring and then top ring.
3. Second
ring have "N"marks stamped on
the ring ends. These
"N"marks
have t o face upward when installed on the piston.
OPEN ENDS
OF
PISTON RING
'
I
FIG. 43
Top ring Barrel face
Second ring Taper
...... ......
......
... ...
...........
...........
. . . . . . . . . . . . . . . . . . . .
.........
Oil
ring Cutter
ring with
expander
:e
......
.......
................ ......
...........
..........
FIG. 44
(2) Assemble the piston and connecting rod with the piston pin.
I
1. Set the "D"or "B"mark stamped on piston top to the "FAN"mark side of the
2.
Apply
enough oil t o the
small
end of the connecting rod.
3 .
Be sure t o set the clips on both ends of the piston
pin.
connecting rod.
I
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