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Date
1-1-89 ·
Page
5-10
MC-9 MAINTENANCE MANUAL
Figure 5- 31 Pilot Bearing Bore Surface Runout.
5. Now move gauge stylus to contact pilot bearing bore
surface (Figure 5-31). Rotate flywheel. Maximum total allow-
able runout is ,005'" (.127 mm).
If any of these limits are exceeded. the problem must be
corrected or misalignment will cause premature wear to drive
train components.
PRE-INSTALLATION CHECKS
Before installing the clutch. check the following items:
1.
Inspect friction face of flywheel for smoothness. heat
checks. scoring, excessive wear or runout on contact surface.
The inspection for heat checks and scoring must be visual and
based on experience: however. measure frictron surface wear
with straight edge and feelers. Replace or repair flywheel if
wear is excessive. Refer to the manufacturer's recommenda-
tions concerning replacement or rebuilding.
2. If clutch is new. remove protective coating from pressure
plate and intermediate plate.
3. A new pilot bearing should be used with a new or rebuilt
clutch. If the old bearing Is reused. clean and check the bearing
thoroughly. Repack with lubricant.
4. If the flywheel has been replaced, always indicate the face
and pilot diameters to make sure total indicator runouts are
within engine manufacturer's specifications.
5. Check fit of splined hubs of front and rear friction discs by
sliding on main drive gear spline of transmission. Hubs must
slide free if clutch Is expected to release cleanly and properly.
INSTALLING CLUTCH ON FLYWHEEL
1. Insert
two
7 116" -14NC (5" 1127 mrr) long). guide studs
into two upper mounting holes of the flywheel. Rotate flywheel ii
necessary to level guide studs.
2. Slide clutch disc aligning tool or dm1e gear stem through
release bearing sleeve and assemble rear disc on tool.
3. Place intermediate plate in clutch cover assembly. Align
driving lug of plate with slots provided. Assemble front disc on
tool. See Figure 5-32 tor proper location of driven discs.
4. Position clutch assembly under flywheel and use a small
chain hoist or iack to lift clutch assembly into position on the
two guide studs.
DAMPER CONSTRUCTION SHOWN ABOVE
CENTER LINE
,.... :
·•
:
.
!
-
'L .. ...:
.
~;.;,.;..,..,...--~-
.
~ - , ~
Front
·
~(
~
Rear
Diak
-----r
~ ~ D i a k
151/:a" TWO PLATE
I
FLYWHEEL
SURFACE
RIGID CONSTRUCTION SHOWN BELOW
CENTER LINE
Figure
5-32.
Clutch Plate Construction.
5. Slide clutch assembly forward and position in flywheel
pilot Start eight retaining capscrews
with
lock washers and run
in finger tight. Tap clutch disc aligning tool to make sure it has
entered and centered in pilot bearing.
6. Tighten the capscrews progressively and evenly to pull
the clutch ring into its proper position in the flywheel pilot.
CAUTION: Don't try to pull the clutch into
place by running one capscrew co~pletely
down with an impact wrench. This proce-
dure can crack or break the pilot shoulders,
causing eccentricity, off-square mounting
and out-of-balance conditions.
7. Remove the two guide studs and insert two remaining
capscrews and lock washers. For the final check. progressively
tighten all capscrews to 35-40
~
lbs. (47-54 Nm) torque.
8. As the capscrews are tightened, the¾" wooden shipping
blocks should fall free. If they don't, remove them at this time.
Likewise. the final tightening will clamp the front and rear driven
disc in position. so remove the clutch disc aligning tool at this
time.
INSTALLATION OF TRANSMISSION
TO CLUTCH AND ENGINE
1. Apply a light coating of anti-seize compound or high
temperature grease to the sides and bottom of the main drive
gear splines. This will help prevent rust. fretting, corrosion. etc.
while the clutch is
in
service and afford easier transmission
removal at a later date. Spread a small amount of grease inside
the clutch release bearing.
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