ROLLER G-CAR 0548694 - Caterpillar

1. Install pinion (3) in housing (4) complete with the bearings.2. Install washer (5) and nut (6). Do not install seal (11).3. While pinion (3) is slowly turned, tighten nut (6) to obtain a rolling torque of ... 1.12 to 3.15 N m (10 to 28 lb inch).4. If the rolling torque exceeds the specification, back off 1/8of a turn, reseat the bearings and recheck. Check the assembly for zero end play. Reduce preload torque ... 0.6 N m (5.31 lb inch)for used bearings with more than 100 hours of operation.
Illustration A5. When the torque for rotating the pinion is correct, stake nut (6) by peening the collar into the slot in the pinion shaft. Proper peening requires the use of a spherical nose punch with a diameter of (B). Hold the punch at an angle that equals (A). The desired result is a stake of minimum length (C) and minimum depth (D). See Illustration A for a view of a completed staked nut.List of dimensions for a staked nut.Dimension (A) ... 10 to 30°Dimension (B) ... 7.5 to 8.0 mm (.30 to .32 inch)Dimension (C) ... 4.7 mm (.19 inch)Dimension (D) ... 2.5 mm (.10 inch) The nut may be reused if the collar is not cracked during removal or during restaking.6. Install the pinion subassembly in carrier assembly (9) with 80 percent of shim pack (2) and with the bevel gear group. Make sure that the axle centerline is vertical and that the teeth of bevel gear (7) are facing upward, as shown.7. Tighten one of two bolts (10) in each bearing cap to a torque of ... 70 N m (50 lb ft). Tighten the other bolt in each bearing cap to a torque of ... 5 N m (4 lb ft). 8. Move adjusting nuts (1) and (8) to a position that maintains the gear backlash and a slight bearing end play, but not a tight gear mesh.9. Measure the torque required to rotate pinion (3) and record the measured torque.10. Move adjusting nut (8) while rotating bevel gear (7) to zero backlash position. Move adjusting nut (8) back to the nearest lock position.11. Move adjusting nut (1) until the torque to rotate pinion (3) is increased ... 0.6 to 1.1 N m (5.3 to 9.7 lb inch)more than the torque found in Step 9. This is the seated position.12. Tighten adjusting nut (1) by three lugs to the nearest lock position.13. Measure the backlash between bevel gear (7) and pinion (3). The backlash must be ... 0.36 0.13 mm (.014 .005 inch).14. If the backlash does not meet the specification, retract one nut the same amount the opposite nut is advanced to keep the bearing preload.15. Tighten two ... 30 mmbearing cap bolts (10) to ... 1800 200 N m (1325 150 lb ft)and two ... 24 mmbearing cap bolts (10) to ... 900 100 N m (660 75 lb ft)16. Measure overall rolling torque at pinion