FRONT PLANETARY GEAR INSPECTION

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Radial Needle Bearing Inspection (in Pinion Gear)

1.  Place the front planetary gear on a workbench as shown in the figure.

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2.  Rotate the pinion gears by hand and verify that there is no malfunction in the radial needle bearing in the pinion gear (rotation sticking).

Caution

•  Verify all of the pinion gears.

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•  If there is a malfunction, replace the front planetary gear with a new one.

Thrust Needle Bearing Inspection

1.  Place the front planetary gear on a workbench as shown in the figure.

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2.  Assemble the front sun gear to the front planetary gear.

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3.  With a load applied by hand to the front sun gear, rotate the front sun gear and verify that there is no malfunction in the thrust needle bearing (rotation sticking).

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•  If there is a malfunction, replace the front planetary gear with a new one.

4.  Remove the front sun gear.

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Pinion Washer Inspection

Pinion washer visual inspection

1.  Visually verify that all of the following washers are between the pinion gear and planetary carrier for one pinion gear.

Caution

•  Verify all of the pinion gears.

―  Copper washer: 2

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•  Even if one of the washers is damaged, replace the front planetary gear with a new one.

Pinion washer wear inspection

1.  Place the front planetary gear on a workbench as shown in the figure.

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2.  Measure the gap between the pinion washer and planetary carrier.

Caution

•  Measure all of the pinion gears.

Note

•  Recommended measuring instrument: Thickness gauge

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•  If it is the maximum specification or more, replace the front planetary gear with a new one.

Thread Damage Inspection

1.  Place the front planetary gear on a workbench as shown in the figure.

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2.  Verify that the new locknut can be installed smoothly.

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•  If the locknut cannot be installed smoothly, repair the threads with a file.

•  If repairing the threads is not possible, replace the front planetary gear.

3.  Remove the locknut.

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