Kubota WG1605-G-E3 Workshop Manual page 131

WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, 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 dimensions of crankshaft journal
0.2 mm
Undersize
0.008 in.
2.3 to 2.7 mm radius
Dimension A
0.091 to 0.10 in. radius
1.0 to 1.5 mm relief
*Dimension B
0.040 to 0.059 in. relief
47.734 to 47.750 mm dia.
Dimension C
1.8793 to 1.8799 in. dia.
The crankshaft journal must be fine-finished to higher than Rmax = 0.8S
*Holes to be de-burred and edges rounded with 1.0 to 1.5 mm
(0.040 to 0.059 in.) relief.
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. (See figure.)
Dimension (A) Factory specification
(1) Seam
(2) Crankshaft Bearing 1
(3) Cylinder Block
1-S53
ENGINE
0.0340 to 0.114 mm
0.00134 to 0.00448 in
0.20 mm
0.0079 in.
47.934 to 47.950 mm
1.8872 to 1.8877 in
47.984 to 48.048 mm
1.8892 to 1.8916 in
0.4 mm
0.02 in.
2.3 to 2.7 mm radius
0.091 to 0.10 in. radius
1.0 to 1.5 mm relief
0.040 to 0.059 in. relief
47.534 to 47.550 mm dia.
1.8715 to 1.8720 in. dia.
9Y1210661ENS0057US0
0 to 0.3 mm
0 to 0.01 in.
(A) Dimension
(a) 0.37 rad (21 °)
9Y1210318ENS0118US0
KiSC issued 01, 2012 A