Pinion Gear To Ring Gear Engagement (4-Wheel Drive Axle) - Toro Groundsmaster 3280-D Service Manual

Pinion Gear to Ring Gear Engagement (4-Wheel Drive Axle)

Drive Axles: Service and Repairs
The final position of the pinion gear 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.
2. Install the input shaft/pinion gear assembly into the axle case.
3. While applying a light load to the ring gear, rotate the pinion gear in the
direction of forward travel until the ring gear has made 1 complete revolution.
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1. More than 35% total tooth contact
Ideal tooth contact observed on the ring gear should cover more than 35% of
each tooth surface. The contact area should be in the center of each tooth
and extend 1/3 to 1/2 way across each tooth from the toe end
Figure 282
3. Toe
4. Lengthwise bearing arc
(Figure 282):
Figure 283
Page 8–70
5. Heel
6. Root
(Figure 283).
Groundsmaster ® 3280-D/3320
05138SL Rev B