Kubota WSM L3540-II, Workshop Manual

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ENGINE L3540-II, L4240-II, L5040-II, L5240-II, L5740-II , WSM
1-S65
Oil Clearance of Camshaft Journal
1. Measure the camshaft journal O.D. with an outside micrometer.
2. Measure the cylinder block bore I.D. for camshaft with a cylinder
gauge, and calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit, replace the
camshaft.
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[3] PISTON AND CONNECTING ROD
Piston Pin Bore I.D.
1. Measure the piston pin bore I.D. in the horizontal and vertical
directions with a cylinder gauge.
2. If the measurement exceeds the allowable limit, replace the
piston.
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Oil Clearance between Piston Pin and Small End Bushing
1. Measure the piston pin O.D. where it contacts the bushing with
an outside micrometer.
2. Measure the small end bushing I.D. with an inside micrometer,
and calculate the oil clearance.
3. If the oil clearance is more than the allowable limit, replace the
bushing. If it stays more than the allowable limit, replace the
piston pin.
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Oil clearance of
camshaft journal
Factory specification
0.050 to 0.091 mm
0.0020 to 0.0035 in.
Allowable limit
0.15 mm
0.0059 in.
Camshaft journal O.D. Factory specification
39.934 to 39.950 mm
1.5722 to 1.5728 in.
Cylinder block bore I.D. Factory specification
40.000 to 40.025 mm
1.5748 to 1.5757 in.
Piston pin bore I.D.
Factory specification
25.000 to 25.013 mm
0.98426 to 0.98476 in.
Allowable limit
25.050 mm
0.98622 in.
Oil clearance between
piston pin and small end
bushing
Factory specification
0.014 to 0.038 mm
0.00056 to 0.0014 in.
Allowable limit
0.15 mm
0.0059 in.
Piston pin O.D. Factory specification
25.002 to 25.011 mm
0.98433 to 0.98468 in.
Small end bushing I.D. Factory specification
25.025 to 25.040 mm
0.98524 to 0.98582 in.
KiSC issued 02, 2015 A