Crankshaft And Main Bearings; Checking Camshaft Assembly - Navistar INTERNATIONAL DT 466 Service Manual

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WARNING: To prevent personal injury or
death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
3. Blow dry with filtered compressed air.
4. Inspect all rubber hoses for cracking or
deformation. Replace components as necessary.

Crankshaft and Main Bearings

Perform the following steps:
1. Clean the bearing inserts and caps thoroughly
in solvent and dry with filtered compressed air .
Do not scrape gum or varnish deposits from
bearing shells.
2. Clean all the internal oil passages of the
crankshaft using a stiff nylon brush (Table 40).
Loosen all dirt, sludge and deposits which may
have accumulated. Flush the oil passages with a
suitable non-caustic solvent.
WARNING: To prevent personal injury or
death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
3. Blow passages dry with filtered compressed air .
4. Inspect the crankshaft journals (main and rod)
for scratches, grooves and scoring.
penetrant methods to check for cracks.
5. Inspect all bearing inserts. Replace bearings that
are scored, chipped or worn.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
CRANKCASE, CRANKSHAFT, AND CAMSHAFT
Use dye
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
Figure 375 Inspecting the crankshaft journals
6. Measure the diameter of each journal using a
micrometer. Measure each journal at two points,
right angles to each other. Move the micrometer
over the entire width of the journal.
NOTE: If journals exceed maximum out-of-round
specification, crankshaft must be reground or
replaced. The crankshaft can be ground to the
following undersizes:
• 0.25 mm (0.010 in)
• 0.51 mm (0.020 in)
• 0.76 mm (0.030 in)

Checking Camshaft Assembly

1. Use a soft bristle brush and a suitable solvent to
clean the camshaft and cam gear.
2. Inspect the cam gear for worn and damaged teeth.
Replace the gear assembly, if necessary.
3. Inspect the camshaft for scuffed,
and cracked lobes.
necessary.
4. Inspect the camshaft thrust plate for wear, cracks,
and distortion.
measure the thickness of the thrust plate. If the
thrust plate is too worn or damaged, replace the
thrust plate.
EGES-265-2
Replace the camshaft if
Use an outside micrometer to
scored