2--32
62--11161
2.3.4 Crankshaft (Continued)
2.3.4.d Crankshaft Journal to Crankshaft Bearing
#1 Clearance
1. Measure the O.D. of the crankshaft journal with an
outside micrometer.
2. Measure the I.D. of crankshaft bearing #1 with an in-
side micrometer and calculate clearance.
3. If the clearance exceeds the allowable limit, replace
crankshaft bearing #1.
4. If the allowable limit is not attainable with a standard
size bearing, install an undersize bearing by referring
to the table below.
Crankshaft
Journal to #1
Bearing
Clearance
Factory
Specification
0.034 to 0.106 mm
0.00134 to 0.00417 in.
Allowable
Limit
0.20 mm
0.0079 in.
Crankshaft
Journal O.D.
Factory
Specification
39.934 to 39.950 mm
1.57221 to 1.57284 in.
Crankshaft
Bearing Bearing
I.D.
Factory
Specification
39.984 to 40.040 mm
1.57148 to 1.57638 in.
(Reference)
Bearing clearance between crankshaft
journal and crankshaft bearing 1.
Undersize
Bearing
Code Number
Marking
0.2 mm
0.008 in.
Crankshaft Bearing 1
02
25--34389--02
020 US
0.4 mm
0.016 in.
Crankshaft Bearing 1
04
25--34389--04
040 US
(Reference)
Undersize dimensions of crankshaft
journal.
Undersize
0.2mm / 0.008 in.
0.4mm / 0.016 in.
Dimension
A
1.8 to 2.2 mm radius
0.071 to 0.087 in.
radius
1.8 to 2.2 mm radius
0.071 to 0.087 in.
radius
Dimension
B
1.0 to 1.5 mm dia.
0.0394 to 0.0591 in.
dia
1.0 to 1.5 mm dia.
0.0394 to 0.0591 in.
dia
Dimension
C
39.734 to 39.750
mm dia.
1.56433 to 1.56496
in. dia.
39.534 to 39.550
mm
1.55646 to 1.55709
in. dia.
The crankshaft journal must be fine--finished to higher than
0.8--S.
