Kubota GR1600EU Workshop Manual page 134

GR1600EU, WSM
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.
Factory specification
Oil Clearance between
crankshaft journal and
crankshaft bearing 1
Allowable limit
Crankshaft journal O.D. Factory specification
Crankshaft bearing 1 I.D. Factory specification
(Reference)
• Undersize crankshaft bearing 1
Undersize Bearing
0.2 mm
Crankshaft bearing 1 02
0.008 in.
0.4 mm
Crankshaft bearing 1 04
0.016 in.
• Undersize dimensions of crankshaft journal
Undersize
1.8 to 2.2 mm radius
Dimension A
0.071 to 0.086 in. radius
Dimension B
39.734 to 39.750 mm dia.
Dimension C
1.5644 to 1.5649 in. dia.
The crankshaft journal must be fine-finished to higher than Rmax = 0.8S.
Replacing Crankshaft Bearing 1
(When removing)
1. Press out the used crankshaft bearing 1 using a crankshaft
bearing 1 replacing tool. (Refer to "8. SPECIAL TOOLS" on
page G-50.)
(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.)
Dimension (A) Factory specification
(1) Seam
(2) Crankshaft Bearing 1
(3) Cylinder Block
1-S48
0.0340 to 0.106 mm
0.00134 to 0.00417 in.
0.20 mm
0.0079 in.
39.934 to 39.950 mm
1.5722 to 1.5728 in.
39.984 to 40.040 mm
1.5742 to 1.5763 in.
Code Number
15861-23910
15861-23920
0.2 mm
0.008 in.
1.8 to 2.2 mm radius
0.071 to 0.086 in. radius
5 mm dia. 5 mm dia.
0.2 in. dia. 0.2 in. dia.
39.534 to 39.550 mm dia.
1.5565 to 1.5570 in. dia.
9Y1210595ENS0083US0
0 to 0.3 mm
0 to 0.01 in.
(A) Dimension
9Y1210595ENS0084US0
ENGINE
Marking
020 US
040 US
0.4 mm
0.016 in.
KiSC issued 11, 2013 A