Robin America DY30 Service Manual page 25

Assemble the piston.
MOTE:
+ mark in the upper part of the piston is to
be faced to the fan side.
MOTE: Piston rings are not assembled.
MOTE: Shape of the piston pin.is (D
.
(See Fig. 38
.)
Assemble the cylinder
NOTE: Insert the piston
into the cylinder (piston
ring is not inserted.), and measure the dimensions of
the head of piston and upper surface of the cylinder.
NOTE: The concave dimensions of the pistion is -0.6
-
-0.7
mm from the upper Surface of the Piston.
Fig. 38
MOTE: Adjustment of the concavedimensions is to be made by the shim underneath the cylinder, and available thick-
ness of the shim are 0.1 mm and 0.2 mm.
MOTE: Fit the piston rings on the piston.
Punched mark
"N"
are to be faced up. Open end of each ring must avoid the direction toward the thrust side and
it
is
to be set to the different three directions.
NOTE: Set the cylinder.
Be sure to fit rubber
"0"
ring and shim.
Notched portion of the cylinder skirt must
be
set on the side of the gear case cover.
(See Figs. 39-1 and 39-2.)
TOP
R I N G
D
SECOND R I N G
I
OIL RING
2 3
1
Fig. 39- 7
7 )
'
Install the flywheel.
(Use 41 m m box wrench.)
NOTE: When putting lock washers on, be sure to
bend the tabs securely.
[Tightening torque: 2,000
-
2,200 kg-cml
(See Fig. 40.)
Fig. 39-2
f i g . 40
-
22
-