Kubota SM-E4B Series User Manual

ENGINE
SM-E4B SERIES, WSM
1-S58
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 inside
micrometer, and calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit, replace the
camshaft.
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Oil Clearance between Idle Gear Shaft and Idle Gear Bushing
1. Measure the idle gear shaft O.D. with an outside micrometer.
2. Measure the idle gear bushing I.D. with an inside micrometer,
and calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit, replace the
bushing.
4. If it still exceeds the allowable limit, replace the idle gear shaft.
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Replacing Idle Gear Bushing
(When removing)
1. Press out the used idle gear bushing using an idle gear bushing
replacing tool. (Refer to "SPECIAL TOOLS".)
(When installing)
1. Clean a new idle gear bushing and idle gear bore, and apply
engine oil to them.
2. Press in a new brushing using an idle gear bushing replacing
tool, until it is flush with the end of the idle gear.
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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
32.934 to 32.950 mm
1.2967 to 1.2972 in.
Camshaft Bearing I.D.
(Cylinder block bore I.D.)
Factory specification
33.000 to 33.025 mm
1.2993 to 1.3001 in.
Oil clearance between
idle gear shaft and idle
gear bushing
Factory specification
0.020 to 0.084 mm
0.00079 to 0.0033 in.
Allowable limit
0.10 mm
0.0039 in.
Idle gear shaft O.D. Factory specification
19.967 to 19.980 mm
0.78611 to 0.78661 in.
Idle gear bushing I.D. Factory specification
20.000 to 20.051 mm
0.78741 to 0.78940 in.
(A) When Removing (B) When Installing
KiSC issued 01, 2013 A

Kubota SM-E4B Series Specifications

General

Brand	Kubota
Model	SM-E4B Series
Category	Engine
Language	English