Crankshaft, Main Bearings, and Flywheel
02
040
20
RG,RG34710,164 –19–13AUG99–2/2
RG8200 –UN–21MAY98
Removing Crankshaft from Block
CAUTION: Crankshaft is very heavy. Plan a
proper handling procedure to avoid injury.
9. Attach a lifting strap to crankshaft. Protect machined
journals from damage with clean shop towels.
10. Using proper lifting equipment, carefully raise
crankshaft out of cylinder block.
11. Clean crankshaft, especially oil passages, using
solvent and compressed air.
12. Put crankshaft on clean V-blocks for inspection.
RG,RG34710,165 –19–13AUG99–1/2
Inspect Crankshaft
NOTE: If crankshaft damper damage was discovered
during teardown, it is recommended that the
crankshaft be magna-fluxed. This will verify
whether or not it has microscopic cracks or
fissures. (See INSPECT CRANKSHAFT
VIBRATION DAMPER, earlier in this group.)
1. Thoroughly clean crankshaft. Clear restrictions from
all oil passages.
2. Inspect crankshaft for signs of load stress, cracks,
or scratches on journals. Also check each journal
for evidence of excessive overheating or
discoloration. If either condition exists, replace
crankshaft, since heat treatment has probably been
destroyed.
3. Inspect (front) crankshaft gear and timing wheel for
cracks, chipped teeth, or excess wear. Inspect
keyway and index pin for damage and proper
indexing on flange. Replace gear(s) as required.
(See REPLACE CRANKSHAFT DRIVE GEAR, later
in this group.)
4. Inspect the keyway for evidence of cracks or wear.
Replace crankshaft as necessary.
5. Carefully inspect the rear flange of the crankshaft in
the area of the oil seal’s wear sleeve contact
surface for evidence of a rough or grooved
condition. Any imperfections in this area will result
in oil leakage. Slight ridges may be cleaned up with
emery cloth and crocus cloth.
6. Check each journal for evidence of excessive
overheating or discoloration. If either condition
exists, replace crankshaft, since heat treatment has
probably been destroyed.
IMPORTANT: The vibration damper MUST BE
replaced whenever the crankshaft is
replaced.
CTM100 (06APR04)
02-040-20
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=216
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