<kinds of bearings for undersize>
(a) Standard
(b) 0.25 (Inside dia. 0.25mm less than standard)
(c) 0.50 (Inside dia. 0.50mm less than standard)
(d) 0.75 (Inside dia. 0.75mm less than standard)
(e) 1.00 (Inside dia. 1.00mm less than standard)
There are 4 kinds as above, and the
crankshaft also can be used by regrinding
as above.
<“R part” standard value>
(a) Crank pin “R part” : 4.0
-0.5
0
(b) Crank journal “R part” : 4.0
-0.5
0
NOTE : In case of crankshaft regrinding, the “R part” at the end of bearing must accurately be
ground without fail and should avoid any processed jaw or coarse surface.
Run out of Crankshaft
(a) Place the crankshaft on the V-block.
(b) Place the dial gauge on the surface
plate and measure the run out of
crankshaft rotating the crankshaft.
2) Inspection on crankshaft bearing and
connecting rod bearing
Inspection
•
Inspect the crankshaft bearing andconnecting rod bearing for any damages such as
lopsided wear, scratch etc. and if abnormal, replace it.
•
Inspect the oil clearance between the crankshaft and bearing.
a) How to utilize the cylinder gauge
Assemble the main bearing at the
cylinder block and after tightening the
bearing cap at the specified torque,
measure the inside diameter.
- 86 -
" R "
" R "
" R "
" R "
" R "
EFM2048I
Normal
Poor
Poor
Standard
Limit
0.06 mm
0.4 mm
1
Journal bearing
103.98 ~ 104.00 mm
nominal diameter
Bearing cap
Initial 30 kg.m + Angle90
˚
Bolt torque
