(2) Crankpins
{a) Inspect each crankpin for surface flaws such as
roughing, scratches, pitting and bums, and, as
necessary, repair the crankpins by grinding to
the next undersize or replace the crankshaft.
(b) Mike each crankpin to take a total of four
readings to detennine the wear, out-of-round
and taper. If any of the limits is exceeded,
repair by grinding to the next undersize or
replace the crankshaft.
Specifications
Unit: mm (in.)
Item
Diameter of
journals
Out of round-
ness of crank-
pins and journals
Taper of crank-
pins and journals
Diameter of
crankpins
Fit of journals
in main bearings
Standard
65-0.0lS
-0.035
(2 559-o.ooos9
· _-0.00138
O.Ql (0.0004),
max
58 -o.oJs
-0.0SS
c2 28ro.001Js)
· -0.00217
0.03-0.089
(0.0012-
0.00350)
Repair
Service
limit
limit
-0.15
-0.9
(-0.0059) (-0.035)
0.03
(0.0012)
•
-0.20
(-0.008)
0.2
(0.0079)
Uneven
wear:
0.03
(0.0012)
Miking crankshaft crankpins
