4.
5.
6.
7.
Mount and secure rear bearing plate.
8.
Install piston assemblies.
Heat timing gear on an electric burner or oven to
CRANKCASE
about 350"
F
(175°C). Install key on crankshaft, If the crankcase requires replacement, a new set of
then drivegear into place. Install retaining washer injection
pump
shims
will
be furnished with the
new
and lock ring.
.
crankcase. These must be used and, in addition, the
Set upper half of center main housing on crank- injection pump must be retimed to the engine. If, on
shaft and rotate it into place. See Figure
64.
the four cylinder models, the center main bearing
Be sure it is installed with the side marked
front
support requires replacement, the whole crankcase
toward crankshaft gear. Set the two positioning must be replaced or returned to the factory to have a
dowels on the upper bearing mount. Install center new housing fitted.
main bearing cap and torque bolts to 97-102foot-
Check crankshaft end play.
Use
enough rear Whenever new rings or pistons are installed or the
bearing plate shims and gaskets to provide
0.010
cylinder refinished, the engine must be run-in before
inch (0.254
mm)
to
0.015
inch (0.381
mm)
end regular operation can be resumed. Run the engine for
play. If gaskets of more than
0.015
inch
15
to 20 minutes at no load, about 30 minutes at
1/3
(0.381 mm) total thickness are required, use a load, and 2 to 3 hours at 2/3 load. Regular operation
steel shim of proper thickness and a thin gasket can then be resumed. Avoid light load operation
on each side of shim. This avoids excessive during the following several hours for best ring
gasket compression and maintains bolt torque. seating to prevent oil consumption,
pounds (131-138 Nom).
BREAK-IN PERIOD
REAR BEARING PLATE
TALL FLUSH
THRUST WASHER
ALIGN OIL HOLES
IN BEARING CLIP FACING
DE SURFACE
FIGURE
63.
MAIN BEARING INSTALLATION
SIDE MAR KED
''
F
RONT
"
TOWARD CRANKSHAFT
PLACE UPPER BEARING HOUSING
HALF IN POSITION INDICATED BY
CRANKSHAFT BROKEN LINE. ROTATE INTO
POSITION
BEARING HALF CENTER MAIN BEARING
HOUSING (UPPER HALF)
BE
SURE
TO
ALIGN OIL
FIGURE
64.
CENTER MAIN BEARING HOUSING
58
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