Service manual

ENG 11t I INSPECTJONANDREPAJR
Crankshaft main bearing clearance meas-
urement steps:
eMeasure the journal outside diameter _, at
two different positions, if it is out of specifi-
cation limit, replace the crankshaft.
o Measure the main bearing inside diameter _}
at two different positions, photo the read out
down.
®Calculate the oil clearance, if it is out of
specifications, replace the main bearings.
Subtracting the journal outside diameter
_a_from the main bearing inside diameter
Journal Oil Clearance: ........
0.02 - ......
(0.0008 - 0;0020 in)
On the journal, the larger measurement is
used as a basis for calculation of the oim
clearance, and on the main bearing, the
smaller value is used.
_(4-_) Main Bearing Remova_ and Selection
1, Remove:
oMain bearing (i_
Use a Plain Bearing Handle (YU,-04058) (3,
Plain Bearing Installer/Remover (YU-04095)
i ......._ _-_ and Haydraulic Press (4}.
TTx* _} Crankcase
2o Select:
®Main bearing
Main bearing selection steps:
oClean the counterbore in the crankcase where
the main bearing is fitted, and measure the
diameter of the counterbore, By referring to
the table below, choose the proper over-size
main bearing_
3-45