S.l
ENGINE
BODY
92.4mm
STROKE SERIES
WSM,01093
Factory
spec.
Top
clearance
OENGINE
BODY
0.55
to
0.70
mm
0.021
7
to 0.0276
in.
CHECKING
AND
ADJUSTING
C112F018
I
P
I
A109F008
(1)
Piston
(2)
Fuse
(1.5
mm
dia.)
Compression Pressure
1.
After warming up the engine, stop
it
and remove
the
air
cleaner, the muffler and
all
nozzle holders.
2.
Install
a compression tester (Code No:
07909-
30207)
for diesel engines to nozzle holder hole.
3.
After making sure
that
the speed control lever
is
set
at
the
stop position (Non-injection), run the
engine at
200
to 300 rpm with the starter.
4. Read the maximum pressure. Measure the
pressure more than twice.
5.
If the measurement
is
below the allowable limit,
check
the
cylinder, piston ring, top clearance,
valve
and cylinder head.
NOTE
should
be
under
10
%.
0
Variances among cylinders compression values
Top
Clearance
1.
Remove the cylinder head
(then
don't attempt
to
remove the cylinder head gasket).
2.
Bring the piston
to
its
top dead center, fasten
1.5
mm dia.
5
to
7
mm long fuse wires to
3
to
4
spots
on the piston top with grease
so
as to avoid the
recess for intake and exhaust valves and the
combustion chamber ports.
3.
Bring the piston to
its
bottom dead center, install
the cylinder head, and tighten the cylinder head
bolts to specified torque.
4.
Turn the crank shaft until the piston exceeds
its
top dead
center.
5.
Remove the cylinder head, and measure squeezed
fuse wires for thickness.
6.
If
the measurement
is
not within the specified
value, check
the
oil clearance of the crankpin
journal and the piston
pin.
I
93.1 to98.0
N-m
9.5
to
10.0
k
f.m
I
68.7 to 72.3 ?t-lbs
Tightening Cylinder head
torque
bolts
I I
I
I
I
I
5-53
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