Kubota WG1605-G-E3 Workshop Manual page 132

WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
Oil Clearance between Crankshaft Journal and Crankshaft
Bearing 2 (Crankshaft Bearing 3)
1. Put a strip of plastigauge on the center of the journal.
2. Install the bearing case and tighten the bearing case screws 1
to the specified torque, and remove the bearing case again.
3. Measure the amount of the flattening with the scale, and get the
oil clearance.
4. If the oil clearance exceeds the allowable limit, replace the
crankshaft bearing 2 (crankshaft bearing 3).
5. 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.
NOTE
• Be sure not to move the crankshaft while the bearing case
screws are tightened.
Factory specification
Oil clearance between
crankshaft journal and
crankshaft bearing 2
Allowable limit
Crankshaft journal O.D.
Factory specification
(Flywheel side)
Crankshaft bearing 2 I.D. Factory specification
Factory specification
Oil clearance between
crankshaft journal and
crankshaft bearing 3
Allowable limit
Crankshaft journal O.D.
Factory specification
(Intermediate)
Crankshaft bearing 3 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.
51.721 to 51.740 mm dia.
Dimension D
2.0362 to 2.0370 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.
1-S54
ENGINE
0.034 to 0.095 mm
0.0014 to 0.0037 in
0.20 mm
0.0079 in.
47.934 to 47.950 mm
1.8872 to 1.8877 in
47.984 to 48.029 mm
1.8892 to 1.8909 in
0.0340 to 0.103 mm
0.00134 to 0.00405 in
0.20 mm
0.0079 in.
51.921 to 51.940 mm
2.0442 to 2.0448 in
51.974 to 52.024 mm
2.0463 to 2.0481 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.
51.521 to 51.540 mm dia.
2.0284 to 2.0291 in. dia.
9Y1210661ENS0058US0
KiSC issued 01, 2012 A