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INSPECTI
ON
Inspect the cylinder
walls
for
scratches
and
wear.
Measure and record the
cylinder
1.0. at
t
hree levels
in
both an
X
and
Y axis. Take the maximum reading to determine
the
cylinder
wear.
SERVICE LIMIT
:
39 .05
mm
11 .53
7
in
)
Calculate
the
piston-lo-cyllnder
clearance.
Take
the maximum reading to
determine
the
clearance.
Refer to page 7
~4
for
measurement of the piston 0 .0
.
SERVICE LIMIT
:
0
.
' 5 mm (0.006 in
)
Calculat
e the cylinder for tsper
at
three levels in an X
and Y axis.
Take the maximum reading to determine
t
he taper.
\
ERVICE LIMIT
:
0
.
10
mm
(0 .004
in)
Calculate the cylinder for
out-at-round
at
three
levels in
an X
and
Y axis.
Take the maximum reading to determine the
out-o'-round.
SERVICE LIMIT
:
0
.
10
mm
(O.00
4 in
)
The
cylinder
must be rebored and an oversize piston selected if
the service limits are exceeded
.
The following oversize piston are
available.
0.25 mm (0.010 in),
0.50 mm
(0.020 in).
0.75 mm (0.030
in)
and 1.00
mm
(0.040 in)
The
cylinder
must be rebored
so
that the
clearance
to
an
over'
size
piston
is
0.010
-
0.040 mm
(0.004-0.0016 in).
Inspecl the top
of
the
cylinder
for warpage with a feeler gauge
and
a
straight edge.
SERVICE LIMIT
:
0 .05 mm (0
.002
in)
PISTON/PISTON
RIN
G
INSPECTI ON
Measure the piston ring·lo·groove clearance.
SERVICE LIMITS
:
TOP
:
SECOND
:
0
. 12
mm (0
.005
in)
0
. 12
mm
10.005
in
)
CYLINDER
/
PISTON
_
..
~
~")i..\
TOP
_~~~ MIDO
LE
'Y~!"h;;~~I7--
BOTTOM
;
•.
r~-j,
(
~
\ z
~
/
7-3
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