Vetus VF4 - Main Journal Identification

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Service manual VF4 VF5
Main journal identication4.2.1
Bearing grade A Normal, diameter 59.994 ÷ 60.000 paint mark –, numerical code 1 (94 00)°
Bearing grade B Normal, diameter 59.988 ÷ 59.994 paint mark –, numerical code 2 (88 94)°
Bearing grade C Normal, diameter 59.982 ÷ 59.988 paint mark – numerical code 3 (82 88)°
Bearing grade D Normal, diameter 59.867 ÷ 59.873 (*) paint mark – numerical code 6 (67 73)°
Bearing grade E Normal, diameter 59.861 ÷ 59.867 (*) paint mark – numerical code 7 (61 67)°
Bearing grade F Normal, diameter 59.855 ÷ 59.861 (*) paint mark – numerical code 8 (55 61)°
(*) 0.127 mm undersize
(°) Last two numbers (thousandth part) of the main journal dimen-
sion.
In the case of using a crank shaft where the maximum undersize
for the bearings is 0.127 mm through grindings, the grade should
be selected through the measurement of the diameter of the
bearing using table as a reference.
Having dened the grade and the colour of each new or reground
crankshaft bearing, it is necessary to select the pair or thickness of
the bearings that should be the same colour as the corresponding
bearing; the pair of half-bearings required can be ordered from
the parts dept. By quoting the order no.
The above is designed to guarantee the optimum operational
clearances.