Kubota GR1600EC2, Workshop Manual

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1-S47
GR1600EC2, WSM ENGINE
Oil Clearance between Crankshaft Journal and Crankshaft
Bearing 1
1. Measure the O.D. of the crankshaft front journal with an outside
micrometer.
2. Measure the I.D. of the crankshaft bearing 1 with an inside
micrometer, and calculate the oil clearance.
3. If the oil 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 the figure.
(Reference)
• Undersize crankshaft bearing 1
• Undersize dimensions of crankshaft journal
W10323470
Replacing Crankshaft Bearing 1
(When removing)
1. Press out the used crankshaft bearing 1 using a crankshaft
bearing 1 replacing tool. (Refer to “SPECIAL TOOLS”.)
(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. (See figure.)
W10342000
Oil Clearance between
crankshaft journal and
crankshaft bearing 1
Factory spec.
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 spec.
39.934 to 39.950 mm
1.57221 to 1.57284 in.
Crankshaft bearing 1 I.D. Factory spec.
39.984 to 40.040 mm
1.57417 to 1.57638 in.
Undersize Bearing Code Number Marking
0.2 mm
0.008 in.
Crankshaft bearing 1 02 15861-23910 020 US
0.4 mm
0.016 in.
Crankshaft bearing 1 04 15861-23920 040 US
Undersize
0.2 mm
0.008 in.
0.4 mm
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
5 mm dia.
0.20 in. dia.
5 mm dia.
0.20 in. dia.
Dimension C
39.734 to 39.750 mm dia.
1.56433 to 1.56496 in. dia.
39.534 to 39.550 mm dia.
1.55646 to 1.55709 in. dia.
(0.8-S)
The crankshaft journal must be fine-finished to higher than
∇∇∇∇
Dimension (A) Factory spec.
0.0 to 0.3 mm
0.0 to 0.0118 in.
(1) Seam
(2) Crankshaft Bearing 1
(3) Cylinder Block (A) Dimension
KiSC issued 07, 2006 A