Westerbeke W-46 - Page 30

INSPECTION/REPAIR
(NOTE: If the fit or clearance
of main bearings on journals is
still in excess of 0.2mm
(0. 008 in.) even if new bearings
are used, or if the taper or out
of roundness is not less than
o.03mm (0.0012in.), grind the
journals to the next undersize).
2. Crankpins
a. Inspect each crankpin for
surface flaws such as
roughing, scratches, pitting
and burrs1 repair the c~ank
pins, as necess·aty, by
grinding to the next under-
size or replace the
crankshaft.
b. Using a micrometer, measure each crankpin (take a total of
readings) to determine the wear, out-of-round and taper.
any of the limits is exceeded, repair by grinding to the
undersize or replace the crankshaft.
Specifications
Unit: mm (in,)
Item Standard
Repair
Service
limit
limit
Diameter
of
65-0.015
-0.15
-0.035
-0.9
journal
(2 559-0.00059
{-0.0059)
(-0.035)
. -0.00138
Out of round-
ness of crank·
pins and journals
o.m (o.ooo4),
0.03
max (0.0012)
Taper of crank·
pin~ .!Jld Journals
···- ---
Diameter of
58
-o.o35
-0.055
-0.20
crank pin
(
2
28
ro.oot3s)
. -0.00217
(-0.008)
0.2
0,03-0.089
(0.0079)
Fit of journals
(0.0012-
Uneven
in main bearings
0.00350)
wear:
0.03
(0.0012)
28
four
If
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