1.4
DETROIT DIESEL 53
FLYWHEEL
between the crankshaft and the flywheel. is fitted into
The flywheel is attached to the rear end of the
a groove on flywheels used with hydraulic couplings.
crankshaft with six self-locking bolts.
clutches or Torqmatic converters.
A scuff plate
is used between the flywheel and the bolt heads to
The flywheel must be removed for service operations
prevent the bolt heads from scoring the flywheel
such as replacing the starter ring gear. crankshaft or
surface.
flywheel housing. On torque converter units. the
flywheel is part of the torque converter assembly and
is covered in the applicable converter service manual.
A steel ring gear, which meshes with the starting
motor pinion, is shrunk onto the rim of the flywheel.
The flywheel is machined to provide true alignment
Remove Flywheel (Transmission Removed )
with the clutch or a power take-off driving ring, and
the center bore provides for installation of a clutch
1. If a clutch housing is attached to the flywheel
pilot bearing. The clutch or power take-off driving ring
housing, remove the flywheel as follows:
is bolted to the flywheel.
a. Remove the flywheel attaching bolts and the scuff
An oil seal ring, which provides an oil tight connection
plate.
b. Lift the flywheel off the end of the crankshaft and
out of the clutch housing.
2. If a clutch housing isn t used, remove the flywheel
as follows:
a. Remove the flywheel attaching bolts and the scuff
plate while holding the flywheel in position by
hand, then reinstall one bolt.
CAUTION: When removing or installing the
attaching bolts, hold the flywheel firmly against
the crankshaft by hand to prevent it from
slipping off the end of the crankshaft. The
flywheel is NOT doweled IO the crankshaft.
b. Attach flywheel lifting tool J 6361-01 to the
flywheel with two 3/8"-16 bolts of suitable length
as shown in Fig. 1.
c. Attach a chain hoist to the lifting tool.
d. Remove the remaining flywheel attaching bolt.
e. Move the upper end of the lifting tool in and out
to loosen the flywheel, then withdraw the flywheel
from the crankshaft and the flywheel housing.
f. Remove the clutch pilot bearing. if used. as
outlined in Section 1.4.1.
Fig. 1 - Removing Flywheel
g. Remove the oil seal ring, if used.
SEC. 1.4 Page 1
November, 1973
