FLYWHEEL AND FLYWHEEL HOUSING 379
3. Slowly rotate the crankshaft. Record the total
indicator variation and compare the result to the
crankshaft pilot concentricity specification.
Removing Flywheel Housing
WARNING: To prevent serious personal
injury, possible death, or damage to the engine
or vehicle, do not remove any engine mounting
hardware until the engine is properly supported.
Figure 600 Removing flywheel housi
ng
mounting bolts
1. Remove the eight mounting bolt
s that secure the
flywheel housing to the crankc
ase.
2. Useanassistanttohelpremov
etheflywheel
housing from the engine.
3. Inspect for cracks.
Flywheel Reconditioning
Cleaning
Clean the flywheel with a non-caustic solvent and dry
with filtered compressed air.
Inspection
1. Inspect the flywheel for cracks, heat checks, and
extensive scoring which would make it unfitfor
further service. Replace or resurface as required.
2. Inspect ring gear for worn, chipped, or cracked
teeth. If teeth are damaged, replace ring gear.
Flywheel Resurfacing
WARNING: To prevent serious personal
injury, possible death, or damage to the engine or
vehicle, carefully examine the flywheel after
resurfacing for any cracks or heat checks.
Flywheel resurfacing information is provided
for guidance only. Navistar, Inc. assumes no
responsibility either for the results of any wo
rk
performed in accordance with this informatio
nor
for the ability of service personnel to detect
heat
cracks. Any cracks or heat checks in the flywhe
el
could cause it to separate, creating the pos
sibility
of injury to the operator or bystanders
.Ifthere
are any questions, do not use the flywhe
el.
CAUTION: Flexplates used with automat
ic
transmissions cannot be resurfaced.
If damaged,
replace flexplate.
Flywheels used with manual transm
issions may be
resurfaced to correct minor wear
and scoring.
When resurfacing the flywheel, see
dimension “A”
on figure below, to determine if th
e flywheel was
previously refaced or if it has a
dequate stock for
refacing.
EGES-265-2
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
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