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2-50
FLYWHEEL HOUSING
ENGINE
(72
)
If an existing housing is suspected of being
out of alignment it may be checked after re-
moval of the transmission and clutch assem-
blies. If a new housing or
cylinder
crankcase
is being installed, alignment should be checked
before
the'
flywheel
,
clutch and transmission
are installed. When checking alignment the en-
gine must be in an upright position, dowel pins
must be installed, and all housing bolts must
be tight.
Figure 2-49-Checking Alignment of Flywheel Housing
a
.
Checking Alignment of Flywheel Housing
1. Remove transmission (par. 4-29)
and
clutch
(par.
4-10), leaving flywheel in
place.
2. Attach Strap J 808-7 and Pilot J 808-9 to
flywheel with two flywheel bolts. Mount Dial
Indicator KMO 30-B and Hole Attachment
KMO 30-F on pilot with Sleeve KMO 30-K.
Ad-
just ball end of hole
attachment
to bear against
side of pilot hole in flywheel
housing.
See figure
2-49
.
3. Turn flywheel very slowly and note total
run-out of pilot hole as shown by dial indicator.
If total indicator reading is .005" or less, fly-
wheel housing alignment is satisfactory. If
run-out exceeds .005", correction must be made
as described in subparagraph
b
below.
b. Correction of Flywheel Housing
Misalignment
1. Remove
flywheel (par. 2-32) , housing ,
and dowel pins. Reinstall crankshaft rear bear-
ing cap on Series 40-50
engine.
2.
Drill out the two upper bolt holes in fly-
wheel housing and the four bolt holes in crank-
cas
e
flange with a
¥2"
drill. See figures 2-50
and
2-51.
Figure 2-50-Enlarging Bolt Holes In Housing
Figure 2-51-Enlarging Bolt Holes In Crankcase Flange
3. Install flywheel housing
without
dowel
pins,
and
leave
bolts just loose enough to per-
mit shifting of housing by tapping with lead
hammer.
NOTE
:
On S
eries 40-50 use sealing
compound on flywh
eel
hou
sing upper
bolt on
cam
shaft
sid
e
to
prevent
oil
leak ing
into fly-
wheel
hous
in g.
4. Install dial indicator as shown in figure
2-52 and check run-out at pilot hole in
housing.
Figure
2-52-·Aligning
Housing
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