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KRYOTEC ENGINE
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22.Thoroughly clean crank shaft with standard
cleaning solution. Use wire brush for cleaning
oil holes.
NOTE
It is essential to recheck crankshaft for cracks and
balance after grinding.
23.Apply grease to all machined surfaces, if crank
shaft is to be stored. Crank shaft must always
be stored in vertical position.
24.Thoroughly clean main bearing caps and
corresponding
machined
surfaces
of
crankcase.
NOTE
Ensure that the serial numbers on crank case and
main bearing caps are matching. Also caps are in
order and notches for bearing shells are on same
side.
When using a crankshaft which has been
refinished to the maximum value of 0.127 mm by
the operation of grinding and lapping, the class
must be chosen by means of dimensional
measurement of the pin diameter as previously
described.
Do not attempt to refinish a crankshaft main
bearing journal diameter more than 0.127 mm.
Diameter adjustments greater than this endanger
the structural strength of the crankshaft. If the
adjustment required is greater than 0.127 mm, it is
necessary to replace the crankshaft. The bearing
shells used for adjustments greater than 0.127 mm
are no longer available as a spare (although the
relative number is still shown).
The clearance between journal and bearing shell,
obtained by the selection method indicated above,
must be within the following values: Minimum:
0.011 mm - Maximum: 0.071mm. This value may
be measured, as a final check.
BEARING CLASS
• Crankshaft journal class A (normal), 52.994-
53.000 mm, RED, code 1 (94 00).
• Crankshaft journal class B (normal), 52.988-
52.994 mm, BLUE, code 2 (88 94).
• Crankshaft journal class C (normal), 52.982-
52.988 mm, YELLOW, code 3 (82 88).
• Crankshaft journal class D (refinished 0.127 mm),
52.867-52.873 mm, BROWN, code 6 (67 73).
• Crankshaft journal class E (refinished 0.127 mm),
52.861-52.867 mm, GREEN, code 7 (61 67).
• Crankshaft journal class F (refinished 0.127 mm),
52.855-52.861 mm, BLACK, code 8 (55 61) (*):
Last two numbers (part thousandth) is the size of
the main journals
.
NOTE
Select the appropriate bearing shell class based on
the following measurement procedure.