950G and 962G Wheel Loaders and IT62G Integrated Toolcarrier Power Train Caterpillar

Assembly Procedure

Note: The axle housing assemblies that are used in the fixed axle and in the oscillating axle are similar. Therefore, both axle assemblies can be assembled in the same manner.

Show/hide table

Illustration 1	g00311383

1. Use bolts of a suitable size to fasten the rim of the axle shaft to Tooling (B).

2. Heat bearing cone (17) to a maximum temperature of 135°C (275°F).

3. Install bearing cone (17) on the axle shaft, as shown. Make sure that the bearing cone is seated against the shoulder.

   Note: Allow the bearing cone and the axle to reach a uniform temperature.

4. Use a suitable driver or a press to reset the bearing cone. This will ensure that the bearing cone is seated properly.

5. Apply a thin coat of clean SAE 30 oil on bearing cone (17).

   Note: Make sure that the rubber seals and all surfaces that contact the seals are clean and dry. After installation of the seals, apply clean SAE 30 oil on the contact surfaces of the metal seals.

6. Use Tooling (F) to install the Duo-Cone seal in the axle assembly. Refer to Disassembly and Assembly, "Duo-Cone Conventional Seals - Install".
   Show/hide table

   Illustration 2	g00303180

7. Lower the temperature of bearing cup (16). Install bearing cup (16) in the end of the axle housing. Make sure that the bearing cup is seated with the mating surface.

   Note: Allow the bearing cone and the axle to reach a uniform temperature.

8. Use a suitable driver or a press to reset bearing cup (16). This will ensure that bearing cup (16) is seated properly.

   Note: Make sure that the rubber seals and all surfaces that contact the seals are clean and dry. After installation of the seals, apply clean SAE 30 oil on the contact surfaces of the metal seals.

9. Use Tooling (F) to install Duo-Cone seal (15) in the end of the axle housing. Refer to Disassembly and Assembly, "Duo-Cone Conventional Seals - Install".
   Show/hide table

   Illustration 3	g00303179

10. Lower the temperature of bearing cup (13). Install bearing cup (13) in the opposite end of the axle housing, as shown. Make sure that the bearing cup is seated on the mating surface.

    Note: Allow the bearing cone and the axle to reach a uniform temperature.

11. Use a suitable driver or a press to reset bearing cup (12). This will ensure that bearing cup (12) is seated properly.

    Note: The following steps are for the installation of the ring gear.

    Note: Dowels (14) are used to locate ring gear (15).

12. Locate the position of the ring gear in relation to the axle housing. Align the holes to install the dowels. Put alignment marks on the ring gear and on the axle housing to ensure correct installation.

13. Lower the temperature of ring gear (15) to −70°C (−94°F). Install ring gear (15) in the axle housing.

14. Install dowels (14). Peen the axle housing near the dowels to retain the dowels.
    Show/hide table

    Illustration 4	g00303176

15. Install Tooling (A) on the axle housing, as shown. Attach a hoist and suitable lifting slings to Tooling (A).

16. Use the hoist to install the axle housing on the axle shaft. The weight of the axle housing is 105 kg (231 lb).
    Show/hide table

    Illustration 5	g00311444

17. Heat bearing cone (20) to a maximum temperature of 135°C (275°F).

18. Install bearing cone (20) on the axle shaft so that there is slight end play. When bearing cone (20) is cool, apply clean SAE 30 oil to the bearing cone.

    Note: The adjusting nut must be installed so that the part number is facing away from bearing cone (20).

19. Apply clean SAE 30 oil on bearing nut (12). Install bearing nut (12) on the axle shaft. Tighten the nut until a small amount of end play remains.

20. The seal drag torque is the torque that is needed to rotate the axle housing. Use one of the following methods to measure the seal drag torque:
    Show/hide table

    Illustration 6	g00311446

    1. To measure seal drag torque, install Tooling (G) on the axle housing. Place a torque wrench on the bolt at the center of the bar, as shown. Use the torque wrench to rotate the housing. Record the reading on the torque wrench.
       Show/hide table

       Illustration 7	g00311903

    2. To measure seal drag torque, install a bolt and a nut through an outer mounting hole on the axle housing. Install a torque wrench on the bolt. Make sure that the handle is aligned with the center of the axle shaft. Use the torque wrench to rotate the housing. Record the reading on the torque wrench. Use the following formula to calculate the actual seal drag torque:
       Show/hide table

       Table 2

       B

       "SDT" is the actual seal drag torque in newton meters (N·m).

       "C" is the torque wrench reading in newton meters (N·m).

       "B" is the length of the torque wrench in meters.

       "A" is the bolt circle radius of axle housing (2) in meters. This is equal to 0.229 m (9.016 inch).

21. Tighten nut (11) by using one of the following methods:
    Show/hide table

    Illustration 8	g00303174

    Show/hide table

    Illustration 9	g00311446

    1. Rotate the axle housing. Use Tooling (E) to tighten bearing nut (11). Install Tooling (G) on the axle housing. Place a torque wrench on the bolt at the center of Tooling (G). The torque wrench reading is equal to the seal drag torque plus the axle bearing preload rolling torque. Use the seal drag torque that was recorded in Step 20.

       Note: The preload rolling torque for new bearings is 9 to 16 N·m (7 to 12 lb ft). The preload rolling torque for used bearings is 4.5 to 8 N·m (3.5 to 6 lb ft).

       Show/hide table

       Illustration 10	g00311903

       Show/hide table

       Illustration 11	g00303174

    2. Use the torque wrench to rotate the axle housing. Use Tooling (E) to tighten nut (11). The torque wrench reading must equal the axle bearing preload rolling torque plus the actual seal drag torque. Use the seal drag torque that was recorded in Step 20. Use the following formula to calculate the required torque wrench reading. This formula is used to measure torque at the bolt circle.
       Show/hide table

       Table 3

       B + A

       "C" is the torque wrench reading in newton meters (N·m).

       "B" is the length of the torque wrench in meters.

       "A" is the bolt circle radius of axle housing (2) in meters. This equals 0.229 m (9.016 inch).

       "SDT" is the actual seal drag torque in newton meters (N·m).

       "T" is the axle bearing preload rolling torque. The preload rolling torque for new bearings is 9 to 16 N·m (7 to 12 lb ft). The preload rolling torque for used bearings is 4.5 to 8 N·m (3.5 to 6 lb ft).

22. Make sure that axle shaft (4) has zero end play.

23. If the axle bearing preload rolling torque exceeds the specification, back off nut (11) by 1/8 turn and reseat bearing cone (13) against nut (11). Perform Step 21 again.
    Show/hide table

    Illustration 12	g00303171

    Show/hide table

    Illustration 13	g00303170

24. The following steps are for the assembly of planetary carrier assembly (5):

    1. Install retaining ring (3) in the carrier.

    2. Apply a thin coat of clean SAE 30 oil on all parts of planetary carrier assembly (5).

    3. Install bearing (10) in planetary gear (9).

    4. Install thrust washers (8), planetary gear (9), and shaft (7) in the carrier.

       Note: If thrust washers (8) have alignment tabs, the alignment tabs should be installed towards the center of the carrier.

    5. Install shaft (6) in the carrier. Make sure that the spring pin hole in the shaft is aligned with the spring pin hole in the carrier. Install new spring pin (7) through the carrier and in shaft (6). Install spring pin (7) slightly below the outside surface of the carrier.

    6. Repeat Steps 24.a through 24.e for the remaining two planetary gears.
    Show/hide table

    Illustration 14	g00303169

25. Install Tooling (D) and suitable lifting slings to planetary carrier assembly (5).

26. Use a hoist to install the planetary carrier assembly in the axle housing assembly. The weight of the planetary carrier assembly is 80 kg (175 lb).
    Show/hide table

    Illustration 15	g00303124

27. Use Tooling (C) to install retaining ring (3) on axle shaft (4).

28. Remove axle housing assembly (2) from Tooling (B). Install the bottom half of the axle group on Tooling (B) in a vertical position.

29. Apply 6V-6640 RTV Silicone Sealant on the mating surfaces of the axle housing and of the differential housing.
    Show/hide table

    Illustration 16	g00301040

30. Apply a thin layer of Tooling (H) to the mating surface of the axle housing. Attach Tooling (A) and a suitable lifting device to axle housing assembly (2). The weight of axle housing assembly (2) is approximately 295 kg (650 lb). Carefully install the axle housing assembly.

31. Install bolts (1) that secure axle housing assembly (2) to the differential housing. Tighten bolts (1) to a torque of 300 ± 40 N·m (220 ± 30 lb ft).

End By:

1. Install the fixed axle. Refer to Disassembly and Assembly, "Fixed Axle (Front) - Remove and Install".

2. Install the oscillating axle. Refer to Disassembly and Assembly, "Oscillating Axle (Rear) - Install".