Correct Tooth Contact Setting 7. Check the tooth contact pattern as follows. Check the tooth contact setting between the bevel gear and pinion after the gear clearance (backlash) and bearing preload adjustments have been made as follows. a. Put a small amount of Prussian blue, red lead or paint on the bevel gear teeth. Turn the pinion in both directions and check the marks made on the bevel gear teeth. Install Carrier Assembly (5) Bearing cap (6) Bolts 3. Put the carrier assembly in position in the housing assembly. Install bearing caps (5) and four bolts (6). Tighten bolts (6) to a torque of 220 L 25 NҐm (160 L 18 lbҐft). 4. Install lockwashers (7) and locknuts (8).
Use tooling (A) to check gear clearance (backlash) between bevel gear (2) and pinion (9). Adjust locknuts (8) until the clearance is 0.15 to 0.20 mm (0.006 to 0.008 in.). Adjust the clearance by turning one locknut (8) in and the other locknut out an equal amount. Short Toe Contact Setting 5. Check the rolling torque again as shown in Pinion Bearing Adjustment, Step 6. Tighten locknuts (8) equally to preload the differential case bearings. Proper bearing preload will increase the rolling torque at the pinion (recorded in Pinion Bearing Adjustment, Step 6) by 0.63 to 0.88 NҐm (5.6 to 7.8 lbҐin). b. With no load, correct tooth contact setting will be as shown.
The area of contact starts near the toe of the gear and goes 30 to 50% up the length of the tooth. With this setting, when a load is put on the gear, the load will be over the correct area of the teeth. 6. Measure backlash again. After backlash and preload are correct, bend a tab on each lockwasher (7) into a slot in locknuts (8) to hold them in position. Power Train Testing And Adjusting 26