Kubota WSM J Series Workshop Manual page 136

J SERIES, WSM
(D) Crankshaft
Connecting Rod Alignment
NOTE

• Since the I.D. of the connecting rod small end bushing is the
basis of this check, check the bushing for wear before hand.
1. Remove the crankpin bearing, and install the connecting rod cap.
2. Install the piston pin in the connecting rod.
3. Install the connecting rod on the connecting rod alignment tool
(Code No. 07909-31661).
4. Put a gauge over the piston pin, and move it against the face
plate.
5. If the gauge does not fit squarely against the face plate, measure
the space between the gauge the face plate.
6. If the measurement exceeds the allowable limit, replace the
connecting rod.
Space between gauge
Allowable limit
pin and face plate
Crankshaft Side Clearance
1. Set a dial indicator with its tip on the end of the crankshaft.
2. Measure the side clearance by moving the crankshaft to the front
and rear.
3. If the measurement exceeds the allowable limit, replace the
thrust bearings.
4. If the same size bearing is useless because of the crankshaft
journal wear, replace it with an oversize one referring to the table
and figure.
Factory spec.
Crankshaft side
clearance
Allowable limit
(Reference)
• Oversize thrust bearing
[Z482, D722]
Oversize Bearing
Thrust bearing 1 02
0.2 mm
0.008 in.
Thrust bearing 2 02
Thrust bearing 1 04
0.4 mm
0.016 in.
Thrust bearing 2 04
[D1005, V1305]
Oversize Bearing
Thrust bearing 1 02
0.2 mm
0.008 in.
Thrust bearing 2 02
Thrust bearing 1 04
0.4 mm
0.016 in.
Thrust bearing 2 04
S-90
ENGINE
0.05 mm
0.0020 in.
W11499650
0.15 to 0.31 mm
0.0059 to 0.0122 in.
0.50 mm
0.0197 in.
Code Number Marking
15261-23951 020 OS
15261-23971 020 OS
15261-23961 040 OS
15261-23981 040 OS
Code Number Marking
15521-23951 020 OS
19202-23971 020 OS
15521-23961 040 OS
19202-23981 040 OS
W11554750
KiSC issued 10, 2016 A