Figure 11B-80. Crankshaft Front Oil
S e a l Mounting
Figure 11B-79. Crankshaft Front Oil
may be removed from the crankshaft as
described earlier.
Seal
The maximum runout of the oil seal bore
conditions must be checked and cor-
in the flywheel housing is 0.008". The
rected.
b o r e may be checked with a dial indicator
mounted on the end of the crankshaft in
a manner similar to the procedure for
R e m o v e Crankshaft Oil Seals
checking the flywheel housing concen-
outlined
later
in
this
tricity as
Remove the crankshaft front cover and
This check must be made
subsection.
the flywheel housing and remove the oil
with the flywheel housing in place on the
s e a l s as follows:
e n g i n e and the oil seal removed.
1. Support the forward face of the front
If the crankshaft rear oil seal surface is
cover or the rear face of the flywheel
grooved excessively, an oil seal spacer
h o u s i n g on wood blocks.
2. Drive the oil seal out and clean the
seal bore in the front cover or flywheel
h o u s i n g . D i s c a r d the oil seal.
When necessary, an oil seal may be re-
moved without removing the front cover
or flywheel housing.
This may be done
by drilling diametrically opposite holes in
the seal casing and threading metal
screws, backed by flat washers, into the
casing.
Remove the seal by prying
against the washers with pry bars.
Inspection
Inspect the rear end of the crankshaft
for wear caused by the rubbing action of
the oil seal, dirt build up or fretting by
The crank-
the action of the flywheel.
shaft surface must be clean and smooth
to prevent damaging the seal lip when a
Figure 11B-81. Crankshaft Rear Oil
Slight ridges
new oil seal is installed.
Seal
E n g i n e (Less Major Assemblies)
11B-53
