Kubota M5040, Workshop Manual

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1-S67
M5040, M6040, M7040, WSM ENGINE
(4) Crankshaft
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 out of specifications because of the
crankshaft journal wear, replace it with an oversize one referring
to the table and figure.
(Reference)
• Oversize dimensions of crankshaft journal.
W1066738
Crankshaft Alignment
1. Support the crankshaft with V block on the surface plate and set
a dial indicator with its tip on the intermediate journal at right
angle.
2. Rotate the crankshaft on the V block and get the misalignment
(half of the measurement value).
3. If the misalignment exceeds the allowable limit, replace the
crankshaft.
W1067285
Side clearance of
crankshaft
Factory spec.
0.15 to 0.35 mm
0.0059 to 0.0138 in.
Allowable limit
0.50 mm
0.0197 in.
Oversize
0.2 mm
0.008 in. 0.4 mm
0.016 in.
Dimension A
41.1 to 42.1 mm
1.6181 to 1.6575 in. 41.2 to 42.2 mm
1.6220 to 1.6614 in.
Dimension B
28.20 to 28.25 mm
1.1102 to 1.1122 in. 28.40 to 28.45 mm
1.1181 to 1.1201 in.
Dimension C
2.8 to 3.2 mm radius
0.1102 to 0.1260 in. radius 2.8 to 3.2 mm radius
0.1102 to 0.1260 in. radius
(0.8S)
The crankshaft journal must be fine-finished to higher than
∇∇∇∇.
(A) Side Clearance of Crankshaft
Crankshaft alignment Allowable limit
0.02 mm
0.00079 in.
KiSC issued 06, 2008 A