2-87
87519804 NA Issued 11-06 Bur
CHAPTER 2 - 667TA ENGINE OVERHAUL
ENGINE REPAIR MANUAL
CRANKSHAFT
MEASURING THE JOURNALS AND CRANKPINS
STEP 58
BS06K279
Figure 2-152
If any signs of seizing, scoring or out-of-roundness
are found on the journals and crankpins it is
necessary to resurface the journals by machining.
Prior to resurfacing the journals (2), measure the
journals with a micrometer (1) to determine the
amount (diameter) by which the journals will have to
be reduced.
IMPORTANT: It is advisable to write down the
measured values on the table on page 2-86
figure 2-153
Reduction classes are 0.250 and 0.50 mm (0.0100
and 0.0200 in.).
IMPORTANT: Journals and crankpins must always
be ground to the same reduction class. The reduction
done on the journals and crankpins must be marked
with a special stamping on the side of the crank arm.
For reduced crankpins, use the letter M. For reduced
journals, use the letter B. For reduced crankpins and
journals, use the letters MB.
BS06K280
Figure 2-153
*DATA ON WHICH CRANKSHAFT JOURNALS AND CRANKPIN
MEASUREMENT VALUES ARE TO BE WRITTEN DOWN
2
1
*
*
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