The following must be determined for the selection of main jour-
nal half-bearings:
the numerical code stamped on the ywheel;•
the paint mark, if present, next to the main journals. •
Below is an example of the identication of main journal grades.
Crankpin identication numerical code: the number on the left 1
refers to the rst timing-side bearing,
Main journal identication numerical code: the rst number on 2
the left refers to the rst timing-side bearing.
Series of numbers (if present), in groups of two digits, which 3
indicate the dimensions (thousandth part) of the main journals:
the rst two numbers on the left refer to the rst timing-side
main journal.
Only use the codes that relate to the key, all other codes on
the ywheel should not be used.
For the identication of the main journal category, refer to the nu-
merical code for reference 2.
In the case of the example, the numbers 111111 indicate that all
six bearings are grade A ( red ) as indicated in the table.
A further method for identifying the grade of the bearings is to
read reference 3 (if present) in the diagram.
In the case of the example, the number 94 (rst on the left) corre-
sponds to the dimensions 59.994 for the rst timing-side bearing
which, as indicated in the table, identies Grade A (red); the same
method should be applied for other groups of two digits for the
same reference 3 (97 – 95 – 94 – 95).
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