Section 01 V-810 ENGINE
Subs
e
ct
i
o
n
05 (CYLINDER AND HEAD)
NOTE: Make sure the cylinder bore gauge indica
tor is set exactly at the same position as with the
micrometer, otherwise the reading will be false.
Piston Pin
Using synthetic abrasive woven, clean piston pin
from deposits.
Inspect piston pin for scoring, cracking or other
damages.
Measure piston pin. See the following illustration
for the proper measurement positions.
A
A.
Piston
pm
diameter
PISTON PIN DIAMETER
Minimum New
19.996
mm
(.7872 in)
Maximum New
20.000
mm
(.7874 in}
Service limit
19.980 mm
(.7866 in}
Replace
piston pin
if
diameter is out of specifica
tions.
Connecting Rod Small End Bushing Measure
Inside Diameter of Connecting Rod
CONNECTING ROD SMALL END DIAMETER
Minimum New
20.010
mm
(.7878
in}
Maximum New
20.020
mm
{. 7882
in}
Service limit
20.060
mm
(
.
7898 in}
52
7.
Connecting rod small
end
A.
Connecting
rod
small end diameter
Replace connecting rod if diameter of connecting
rod small end is out of specifications. Refer to
BOTTOM END
for removal procedure.
Installation
For installation, reverse the removal procedure.
Pay attention to the following details.
Apply engine oil on the piston pin.
Insert
piston pin into piston and connecting rod.
CAUTION:
Take care that pistons will
be
in
stalled with the punched arrow on piston top
direction to the rear side
of
the engine.
Front cylinder:
Mark on top of piston must
show to intake side.
Rear cylinder:
Mark on top of piston must
show to
ex
hau
s
t si
de
.
1.
Piston of cylinder
1,
front
2.
Mark on piston must show to intake side of
cylinder 7 front
3.
Piston of
cylinder 2.
rear
'
4.
Mark on piston must show to
exhaust side
of cylinder
2, rear
Use the piston circlip installer (P/N
529 035 921)
to
assemble the new piston circlip as per following
procedure:
CAU'!IO.N:
Always replace disassembled pis
ton c1rcl1p(s) by new ones. Place a rag on cylin
der base to avoid dropping the circlip inside the
engine.
- place circlip
no.
28
in sleeve as per following
illustration
Section 01 V-810 ENGINE
Subsection 05 (CYLINDER AND HEAD)
R400motr100A
1.
Circ//p
2.
Sleeve
3. As
s
e
m
b
ly Jig
from
piston clip installer
-
push taper side of assembly jig until circlip
reaches middle of sleeve
- align sleeve with piston pin axis and push as
sembly jig until circlip engages in piston.
1. Arrow should indicate to engine re<Jr side
2. Hold piston
whl/e pushing circllp in
place
3. Sleeve
4.
Assembly
jig
5.
Direction to push Clfcl1p
NOTE: Take care that the hook of the piston circlip
is positioned properly.
53
Содержание RORAX V-810
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