Crankshaft, Main Bearings, and Flywheel
02
040
29
RG,RG34710,176 –19–05SEP02–1/3
Install Crankshaft
RG8128A –UN–05DEC97
Installing Main Bearing Assembly
RG8125B –UN–20NOV97
Seating Main Bearing Cap
A—JDG996 Main Bearing Cap B—D01300AA Slide Hammer
Puller/Installer
CAUTION: Crankshaft is heavy. Plan a
proper lifting procedure to avoid injuries.
NOTE: If crankshaft is being replaced, vibration
damper should be replaced also.
1. Carefully position crankshaft onto main bearing
inserts using a host and lift sling.
2. Dip all main bearing cap screws in clean engine oil.
Apply a liberal amount of oil to bearing inserts in
caps.
NOTE: Make sure main bearing caps are installed on
the bearing bosses from which they were
removed. The numbers stamped on the caps
should be on the same side as the numbers
on the block. Arrow on cap must point towards
front of the engine. If bearing caps have been
rebored, make sure bearing caps have
numbers stamped on them.
3. Install each bearing cap and bearings with the
recesses and tabs aligned in matching order using
JDG996 Main Bearing Cap Puller/Installer (A) and
D01300AA Slide Hammer (B). Make sure bearing
tabs also match up before tightening cap screws.
NOTE: Main bearing caps may also be installed by
evenly tightening both main bearing cap
screws.
IMPORTANT: Do not use pneumatic wrench to
install main bearing cap screws, as
damage may occur to threads.
4. Before tightening cap screws on main bearing caps,
align upper and lower thrust flanges on main thrust
bearings. Using a soft-face hammer, tap crankshaft
to the rear and then to the front to line up thrust
bearing flanges.
5. Tighten No. 1, 2, 3, 4, 6, and 7 main bearing cap
screws to the following specification.
Specification
Crankshaft Main Bearing Cap
Screws—Initial Torque 68 N•m (50 lb-ft)..............................................
Hand-tighten No. 5 main thrust bearing cap screws.
CTM100 (06APR04)
02-040-29
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=225
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