Kubota M108S, Workshop Manual

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4-S9
M108S, WSM REAR AXLE
[2] SERVICING
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 to measure the backlash.
3. If the measurement exceeds the allowable limit, check the
planetary gear and planetary shaft.
W1014587
Thrust Collar Thickness
1. Measure the thickness of the thrust collar.
2. If the measurement is less than the allowable limit, replace it.
W1014969
Clearance between Planetary Gear and Planetary Gear Shaft
1. Measure the planetary gear shaft O.D. (rubbing surface).
2. Measure planetary gear I.D. (rubbing surface).
3. Measure the O.D. of the two needles installed diagonally in the
needle bearing.
4. Calculate the clearance.
5. (Clearance = Planetary gear I.D. - {(2 x Needle O.D.) + Planetary
gear shaft O.D.}).
6. If the clearance exceeds the allowable limit, replace them.
W1015109
Backlash between
internal gear and
planetary gear
Factory spec.
0.10 to 0.20 mm
0.0040 to 0.0078 in.
Allowable limit
0.50 mm
0.020 in.
Thrust collar thickness
Factory spec.
1.55 to 1.65 mm
0.0611 to 0.0649 in.
Allowable limit
1.2 mm
0.047 in.
Clearance between
planetary gear and
planetary gear shaft
Factory spec.
0.0090 to 0.048 mm
0.00036 to 0.0018 in.
Allowable limit
0.30 mm
0.012 in.
Planetary gear shaft
O.D.
Factory spec.
34.989 to 35.000 mm
1.3776 to 1.3779 in.
Planetary gear I.D. Factory spec.
49.009 to 49.025 mm
1.9295 to 1.9301 in.
Needle O.D. Factory spec.
6.994 to 7.000 mm
0.2754 to 0.2755 in.
KiSC issued 06, 2007 A