Detroit Diesel MBE 4000 Service Manual page 126

1.9 CRANKSHAFT ASSEMBLY
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3. Check the width of the center main bearing shell. If damage or cracks are present, replace
the crankshaft. See Figure 1-58.
Figure 1-58
NOTE:
To obtain a correct value for crankshaft end play, the width of each bearing shell and its
corresponding journal must belong to the same repair stage (both must be "Standard,"
"Undersize - 0.020 inch," etc.).
4. Calculate the end play, or axial play, (fore-to-aft movement) of the crankshaft. If the
end play is less than 0.190 mm (0.0074 inch), or more than 0.322 mm (0.0127 inch) as
listed in Table 1-19, then replace the crankshaft.
Description
End Play (Axial Play) Measured at Center Bearing
Journal
Table 1-19 Crankshaft End Play
[a] For the center main bearing journal, note the width (thickness) of the bearing journal.
Example:W
[b] For the center main bearing shell, note the width (thickness) of the bearing shell.
Example: W
1-78
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Measuring the Width of the Center Main Bearing Shell
= 1.8120 inches.
m
=1.8030 inches.
s
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mm (inch)
0.190-0.322 (0.0074-0.0127)
6SE412 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
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All information subject to change without notice.
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