CRANKSHAFT ASSEMBLY - CONTINUED
INSPECTION - CONTINUED
4. Crankshaft (1)
Using 4- to 5-inch micrometer, mea-
sure diameter of seven main bearing
journals in several places. Check for
out-of-round condition. Main bearing
journals should be 4.4975 to 4.500
inches (114.24 to 114.30 mm).
Tag crankshaft main bearing journals
for grinding if worn smaller than
4.4975 Inches (114.23 mm) or more
than 0.002 inch (0.05 mm) out-of-
b. Using 4-to 5-inch micrometer, mea-
sure seven main bearing journals for
taper across length of journals.
Tag for grinding If taper exceeds
0.0005 Inch (0.0127 mm).
Inspect for and, using depth microm-
eter, measure depth of scratches,
nicks, and score marks.
If scratches, nicks, or score marks
exceed 0.020 inch (0.568 mm), dis-
card crankshaft. If scratches, nicks
or score marks are 0.020 Inch (0.508
mm) or less, tag for grinding.
Using 3 to 4-inch micrometer, meas-
ure distance between thrust bearing
flanges. Distance must be 3.001 to
3.006 inches (76.225 to 76.352 mm).
If distance exceeds 3.006 inches
(76.352 mm), tag for grinding.
Using dial indicator, check thrust bear-
ing flanges for flatness. Flatness should
vary no more than 0.003 inch
If flatness exceeds 0.003 inch
(0.0076 mm), tag for grinding