Kubota M108S, Workshop Manual

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1-S58
M108S, WSM ENGINE
Oil Clearance between Idle Gear Shaft 1, 2 and Idle Gear 1, 2
Bushing
1. Measure the idle gear shaft O.D. with an outside micrometer.
2. Measure the idle gear bushings I.D. with an inside micrometer,
and calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit, replace the
bushing.
W1064968
Replacing Idle Gear Bushing
(When removing)
1. Using an idle gear bushing replacing tool, press out the used
bushing.
(When installing)
1. Clean a new idle gear bushing and idle gear bore, and apply
engine oil to them.
2. Using an idle gear bushing replacing tool, press in a new bushing
(service parts) to the specified dimension. (See figure.)
W10302410
Balancer Shaft Side Clearance
1. Set a dial indicator with tip on the balancer shaft.
2. Measure the side clearance by moving the balancer shaft to the
front and rear.
3. If the measurement exceeds the allowable limit, replace the
balancer shaft.
W1065273
Balance Shaft Alignment
1. Support the balancer shaft with V blocks on the surface plate and
set a dial indicator with its tip on the intermediate journal at high
angle.
2. Rotate the balancer shaft on the V block and get the
misalignment (half of the measurement).
3. If the misalignment exceeds the allowable limit, replace the
balancer shaft.
W1065448
Oil clearance between
idle gear 1, 2 shaft and
idle gear 1, 2 bushing
Factory spec.
0.050 to 0.091 mm
0.0020 to 0.0035 in.
Allowable limit
0.10 mm
0.0039 in.
Idle gear 1, 2 bushing
I.D.
Factory spec.
45.025 to 45.050 mm
1.7727 to 1.7736 in.
Idle gear 1, 2 shaft O.D. Factory spec.
44.959 to 44.975 mm
1.7701 to 1.7706 in.
(A) When Removing (B) When Installing
Side clearance
Factory spec.
0.070 to 0.22 mm
0.0028 to 0.0086 in.
Allowable limit
0.3 mm
0.01 in.
Balancer shaft
alignment
Allowable limit
0.02 mm
0.0008 in.
KiSC issued 06, 2007 A