Kubota M108S, Workshop Manual

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6-S21
M108S, WSM FRONT AXLE
Backlash between Internal Gear and Planetary Gear
1. Set a dial indicator (lever type) on the tooth of the planetary gear.
2. Hold the planetary gear support and move only the planetary
gear.
3. If the measurement exceeds the allowable limit, check the
planetary gear and planetary shaft.
W1022988
Clearance between Planetary Gear and Shaft
1. Measure the planetary gear I.D. and the planetary gear shaft
O.D. (rubbing surface).
2. Measure the O.D. of two needles installed diagonally in the
needle bearing.
3. Calculate the clearance.
4. If the clearance exceeds the allowable limit, replace them.
W1023313
Thrust Collar Thickness
1. Measure the thickness of the thrust collar.
2. If the measurement is less than the allowable limit, replace it.
W1023552
Backlash between
internal gear and
planetary gear
Factory spec.
0.10 to 0.30 mm
0.0040 to 0.011 in.
Allowable limit
0.50 mm
0.020 in.
Clearance between
planetary gear and shaft
Factory spec.
0.0090 to 0.046 mm
0.00036 to 0.0018 in.
Allowable limit
0.30 mm
0.012 in.
Planetary gear I.D. Factory spec.
33.009 to 33.025 mm
1.2996 to 1.3001 in.
Shaft O.D. Factory spec.
24.991 to 25.000 mm
0.98390 to 0.98425 in.
Needle O.D. Factory spec.
3.994 to 4.000 mm
0.1573 to 0.1574 in.
Thrust collar thickness
Factory spec.
1.55 to 1.65 mm
0.0611 to 0.0649 in.
Allowable limit
1.0 mm
0.039 in.
KiSC issued 06, 2007 A