Kubota WSM STV32 Workshop Manual page 131

STV32 · STV36 · STV40, WSM
Oil Clearance between Crankshaft Journal and Crankshaft
Bearing 1
1. Measure the O.D. of the crankshaft journal with an outside
micrometer.
2. Measure the I.D. of the crankshaft bearing 1 with an inside
micrometer, and calculate oil clearance.
3. If the clearance exceeds the allowable limit, replace the
crankshaft bearing 1.
4. If the same size bearing is useless because of the crankshaft
journal wear, replace it with an undersize one referring to the
table and figure.
Factory spec.
Oil clearance between
crankshaft journal and
crankshaft bearing 1
Allowable limit
Crankshaft journal O.D. Factory spec.
Crankshaft bearing 1
Factory spec.
I.D.
(Reference)
A Undersize dimensions of crankshaft journal
Oversize
2.8 to 3.2 mm radius
Dimension A
0.1102 to 0.1260 in. radius
1.0 to 1.5 mm radius
Dimension B
0.0394 to 0.0591 in. radius
59.721 to 59.740 mm dia.
Dimension C
2.35122 to 2.35197 in. dia.
The crankshaft journal must be fine-finished to higher than
Replacing Crankshaft Bearing 1
(When removing)
1. Press out the used crankshaft bearing 1 using a crankshaft
bearing 1 replacing tool.
(When installing)
1. Clean a new crankshaft bearing 1 and crankshaft journal bore,
and apply engine oil to them.
2. Using a crankshaft bearing 1 replacing tool, press in a new
bearing 1 (2) so that its seam (1) directs toward the exhaust
manifold side.
Dimension (A) Factory spec.
(1) Seam
(2) Crankshaft Bearing 1
1-S59
0.040 to 0.118 mm
0.00157 to 0.00465 in.
0.2 mm
0.0079 in.
59.921 to 59.940 mm
2.35909 to 2.35984 in.
59.980 to 60.039 mm
2.36142 to 2.36374 in.
0.2 mm 0.4 mm
0.008 in. 0.016 in.
2.8 to 3.2 mm radius
0.1102 to 0.1260 in. radius
1.0 to 1.5 mm radius
0.0394 to 0.0591 in. radius
59.521 to 59.540 mm dia.
2.34335 to 2.34409 in. dia.
4.2 to 4.5 mm
0.1654 to 0.1772 in.
(3) Cylinder Block
(A) Dimension
ENGINE
(0.8-S)
0000006462E
0000005509E
KiSC issued 04, 2006 A