of
more than 0.015-inch
total
thickness are re-
quired,
then use a steel shim of proper thickness
and
a
thin
gasket on each side of
shim.
This
avoids excessive gasket compression and
main-
tains
bolt
torque.
7.
Install
the piston assembly.
CRANKCASE
If
the crankcase requires replacement, a new set of
injection
pump shims
will
be furnished
with
the new
crankcase.
These
must be used, and in
addition,
the
injection
pump must be retimed to the engine.
CYLINDERHEAD
After
the
first
SOhours of operation, retighten the
the
cylinder
head bolts and check valve clearance.
See Figure 53.
BREAK-IN PERIOD
Whenever new rings or pistons 'are installed or the
cylinder
refinished, the engine must be
run-in
before
regular
operation can be resumed. Run the engine for
15 - 20minutes at no load, about 1/2-hour at 1/3-load
and
2 - 3hours at 2/3-load. Then regular operation can
be resumed.
Avoid
light
load operation
during
the
following
several hours for
best
ring
seating to
control
oil.
44
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