Tooth Contact

Fig. 21 Tooth Pattern Contact Adjustment:

For quiet and reliable final drive operation, the following adjustment must be made correctly.
Checking gear tooth contact pattern is necessary to verify correct relationship between ring gear and drive pinion. Hypoid gears which are not positioned properly in relation to one another may be noisy or have short lift, or both. With checking of gear tooth contact pattern, the most desirable contact for low noise level and long life can be assured.
1. Throughly clean ring gear and drive pinion teeth.
2. Sparingly apply a mixture of powdered titanium oxide and oil or equivalent, to three or four teeth of ring gear drive side.
3. Hold companion flange steady by hand and rotate ring gear in both directions.
4. Refer to Fig. 21 to correct tooth pattern contact.