Ring To Pinion Gear Engagement (Front Axle) - Toro Groundsmaster 3280-D Service Manual

Ring to Pinion Gear Engagement (Front Axle)

Drive Axles: Service and Repairs
Final position of the front axle pinion is verified by using the gear contact pattern
method as described in the following procedure.
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1. Top land
2. Profile
Gear tooth definitions
•
Toe - the portion of the tooth surface at the end toward the center.
•
Heel - the portion of the gear tooth at the outer end.
•
Top Land - top surface of tooth.
1. Paint the teeth of the ring gear, both drive and coast side, with a gear marking
compound, such as DyKem® steel blue.
g226485
1. Heel
2. Drive side
2. While applying a light load to the ring gear, rotate the pinion gear until the
ring gear has made 1 complete revolution. The drive side pattern should be
located at the toe portion of the tooth. The coast pattern should also be at the
toe portion of the tooth
Study the patterns in the following illustrations and correct engagement as
necessary.
Note: When making changes, note that 2 variables are involved. Example:
If you have the backlash set correctly to specifications and you change
the pinion position shim, you may have to adjust backlash to the correct
specification before checking the pattern.
Figure 248
3. Toe
4. Heel
(Figure 248):
Figure 249
3. Toe
4. Coast side
(Figure 249).
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5. Lengthwise bearing arc
6. Root
Groundsmaster ® 3280-D/3320
05138SL Rev B