Do
not
damage
the
pis/on ring
by
spreading
the
ends
100 f8r,
Never
use 8 wire
brush;
it
w
in
damage the
glOOvs
.
Spread each piston ring and remove
it
by
lifting it up
al
a pOint
just
opposite the gap.
CYLINDER/PISTON
Clean carbon deposits from the piston ring grooves
[1
J
~======~
~~=~~~~~~~~
with a used piston ring
12
J thai will be discarded.
Blow the oil passage with compressed air,
if
necessary.
INSPECTION
CYLINDER
Inspect the cylinder walt for scratches and wear.
Measure and record the cylinder 1.0.
al
three levels
in
both the X
and
Y axis. Take the maximum reading to
determine the cylinder
wear
.
SERVICE
LIMIT
: 50.05
mm
(1.9
70
in)
Calculate
the
cylinder-to-piston clearance.
For measurement
of
the piston
0.0.
(page 9-6).
SERVICE LIMIT: 0.10
mm
(0
.004
In)
Calculate the cylinder for taper and out-of-round at
~=====~~~~~~~~
=
===l
three levels
in
an
X
and
Y axis. Take the maximum
y
reading to determine the taper and out-of-round.
_-
__
SERVICE LIMITS:
Out-of-round
: 0.
10
mm
(0.004 in)
Taper: 0.
10
mm
(0
.004 In)
The cylinder must
be
raborad and an oversize piston
fitted
if
the service limits are exceeded.
TOP
MIDDLE
BOTTOM
x
"
---
-
--
9-5
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