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37
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5-4-9 VALVE CLEARANCE ADJUSTMENT
(1) EH09D
Position the piston at the top dead center of
compression stroke by matching the alignment
mark of flywheel with the alignment mark of
crankcase.
EH12-2D
Position the piston at the top dead center of
compression stroke. The top dead center may
be obtained by placing the key slot on the
power take off shaft to 10 o’clock position. (See
Fig. 5-34b)
(2) Loosen the nut under the rocker arm and turn
the bolt (pivot) to adjust the clearance between
rocker arm and valve stem end.
Tighten the nut on rocker arm.
(3) Install rocker cover and gasket.
Rocker cover M6 x 25 mm bolt : 4 pcs.
Note:
Temporally fit the flywheel in position for
easy operation.
Fig. 5-34a
Fig. 5-35
Note:
Check and adjust valve clearance while
engine is cold.
Check operation of valves by turning
crankshaft. Then recheck the valve clear-
ance.
Fig. 5-34b
Model: EH09D
Model: EH12-2D
Valve clearance : 0.07 - 0.13 mm
(0.0028 - 0.0051 in.)
FLYWHEEL
ALIGNMENT
MARKS
45°
P.T.O
THICKNESS GAUGE
ROCKER ARM
BOLT
(
PIVOT
)
NUT
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