CRANKSHAFT /PISTON/CYLINDER
INSPECTION
Support the crankshaft on both end journals.
Set a dial gauge on the center main journal of the
crankshaft.
Rotate the crankshaft two revolutions and read the
runout.
SERVICE LIMIT: 0.05 mm (0.002 in)
Check the primary drive gear teeth for abnormal
wear or damage.
INSTALLATION
Apply molybdenum oil solution to the main journal
bearing sliding surfaces on the upper crankcase and
the crankpin bearing sliding surfaces on the con
necting rods.
The
Install the main journal bearings into the upper
bearing tabs
crankcase.
should be aligned
I
with the grooves ,n
NO TIC E
the cran kcas e.
Do not interchange the bearing inserts. they must
be installed in their original locations or the correct
bear;ng oil clearance may not be obtained, resulting
in engine damage.
Apply molybdenum oil solution to the thrust sur
faces of the crankshaft as shown.
NOTICE
Position all the pistons at TDC (Top Dead Center) to
prevent damaging the crankpin with the connecting
rod.
Install the crankshaft onto the upper crankcase.
Set the connecting rods onto the crankpins.
12-6
I
MEASURE POINT
PRIMARY DRIVE GEAR
7
.
MAIN JOURNAL BEARINGS
71