ROD AS 3799683 - Caterpillar

Illustration 37 g00526500
Move adjustment rings (20) and (21) on the carrier to a position that maintains gear backlash and slight bearing end play.
Illustration 38 g00528785
Install Tooling (G) on yoke assembly (1) , as shown. Use a torque wrench and Tooling (G) to slowly turn yoke assembly (1) . Check the overall rolling torque with no bearing load on the differential bearings. Record the measured torque.
Oscillate the bevel gear and advance adjustment ring (20) . Continue to advance the adjustment ring until there is no backlash. Back off the adjustment ring by 2 lugs to the nearest locking position.
Advance adjustment ring (21) and check the rolling torque on the pinion shaft. Continue to advance the adjustment ring until the rolling torque is 0.5 to 1.7 N m (4.4 to 15.0 lb in) greater than the torque value that was measured in Step 47.
Illustration 39 g00528844
Illustration 40 g00528846
Mount Tooling (D) on the carrier, as shown. Measure the backlash at four places on the bevel gear at 90 degree intervals. Compare the lowest reading to the specifications. The proper backlash setting is 0.36 0.13 mm (.014 0.005 inch).
If the backlash is not within the specification, retract one adjustment ring and advance the opposite adjustment ring equally. This will maintain the bearing preload. Recheck the bearing preload.
Illustration 41 g00315875
After the backlash adjustment and the preload adjustment have been made, the tooth contact between the pinion shaft and bevel gear (41) must be checked. Use the following procedure:
Put a small amount of Prussian blue, red lead, or paint on three or four adjacent teeth of bevel gear (41) .
Rotate the pinion shaft for several revolutions in one direction. Then rotate the pinion shaft for several revolutions in the opposite direction. Then turn the pinion shaft in the original direction in order to observe the marked teeth.
The correct area of tooth contact begins near the inside end of the teeth. The contact area should extend to a maximum of 50 percent of the length of the teeth. See Illustration 41 for the correct area of tooth contact.
Illustration 42 g00315877
If the tooth contact looks like the marks in Illustration 42, perform the following procedure:
Remove some of the shims that are behind the pinion housing.
Repeat Steps 50 through 52 for the backlash adjustment.
Illustration 43 g00315878
If the tooth contact looks like the marks in Illustration 43, perform the following procedure:
Add shims behind the pinion housing.
Repeat Steps 50 through 52 for the backlash adjustment.Note: Always make sure that the backlash adjustment is correct before an adjustment is made to the area of tooth contact. Several adjustments to the backlash and to the tooth contact may be necessary in order to achieve the correct adjustments. A change to gear backlash will also change the gear contact and vice versa.
After the adjustments are made, remove any dyes or paint from the gears.Note: When the proper backlash has been obtained, tighten the bearing cap bolts. The bearing cap bolts have different torque values. Make sure that the proper torque is applied.
Illustration 44 g00528859
Tighten bearing cap bolts (22)