Detroit Diesel MBE 4000 Service Manual page 179

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Measure vertically and about 60 degrees each side of vertical. See Figure 1-102 to locate
the measuring points, and find the current specifications listed in Table 1-31.
1. Bolt
Figure 1-102
[a] Measure the bearing bore in the vertical dimension and note the reading.
[b] Mark off a point 60 degrees counterclockwise from vertical. Measure the bearing
bore in this dimension and note the reading.
[c] Mark off a point 60 degrees clockwise from vertical. Measure the bearing bore
in this dimension and note the reading.
[d] Calculate the average (nominal) bearing-journal diameter from these three
measurements, and determine the current repair stage listed in Table 1-31. If any of
the measurements are out of tolerance, replace the bearing shells.
NOTE:
Connecting-rod bearings for all repair stages are delivered from the factory ready to
install. Do not refinish them in any way.
NOTE:
To obtain a correct value for connecting-rod radial play, the diameters of each bearing
bore and its corresponding journal must belong to the same repair stage (both must
be "standard," "undersize 0.1 mm," etc.).
All information subject to change without notice.
6SE412 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
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Measuring the Inside Diameter of the Bearing Shell
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MBE 4000 SERVICE MANUAL
2. Bearing Cap
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1-131
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