47
ISEKI LAWN MOWERS
Fig. 3-93
(2) Apply engine oil to upper bearing surfaces and
bring the crankshaft softly in contact with them.
Fig. 3-94
(3) Install the lower bearings, which have no oil
grooves or holes, on bearing caps.
Note:
Bearings and bearing fitting surfaces on the
bearing caps should be free from any foreign
matter.
(4) Then install bearing cap seals (B). Drive them
in until they subside 0 – 0.3 mm (0 – 0.012 in.)
from the cylinder block end. Fill the gaps with
silicone compound. Tighten the journal bearing
cap to the specified torque.
Specified torque: 4.5 – 5.5 kgf·m
Fig. 3-95
7. INSTALLATION OF PISTON/CON-
NECTING-ROD ASSEMBLIES
• Install bearings on the connecting-rod big end
and bearing cap with the bearing projections
seated securely in respective notches in the big
end and bearing cap. Apply engine oil to the bear-
ing surfaces.
• Clean the cylinder bores and crankshaft, and
apply engine oil to them.
• Set the crankshaft at BDC.
• Turn the front mark on the piston head towards
the front and make sure that the piston ring gaps
are 120° apart from each other. Then insert the
piston/connecting rod assembly, compressing the
piston rings with a piston ring compressor, into
the cylinder until the connecting rod bearing
comes into contact with the crankpin.
Fig. 3-96
• Install the connecting-rod bearing cap having the
same number that the connecting rod has.
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