740 GC, 740 Ejector, 745 Articulated Truck Power Train Spindle, Service Brake, and Wheel - Assemble Caterpillar

Assembly Procedure

Show/hide table

Illustration 1	g03799395

1. If necessary, install studs (37). Lower the temperature of bearing cup (36) and install bearing cup (36). Lower the temperature of bearing cup (35) and install bearing cup (35).
   Show/hide table

   Illustration 2	g03799393

2. Use Tooling (D) to install Duo-Cone seal (34). Refer to Special Instructions, SEHS8364, "Assembly and Installation of Conventional Duo-Cone Seals" for the correct procedure.
   Show/hide table

   Illustration 3	g03802638

3. Use Tooling (B) and a suitable lifting device to reposition anchor assembly (32) a rotation of 180 degrees. The weight of anchor assembly (32) is approximately 67 kg (148 lb).

4. Use Tooling (D) to install Duo-Cone seal (33). Refer to Special Instructions, SEHS8364, "Assembly and Installation of Conventional Duo-Cone Seals" for the correct procedure.
   Show/hide table

   Illustration 4	g03799388

5. Use Tooling (B) and a suitable lifting device to position anchor assembly (32). The weight of anchor assembly (32) is approximately 67 kg (148 lb).
   Show/hide table

   Illustration 5	g03799386

6. Install three piston adjusters (30).
   Show/hide table

   Illustration 6	g03799062

7. Install backup rings (29) and (26) along the outside face of brake seal (28) and D-ring seal (27).

8. Lubricate the contacting surfaces of brake seal (28) and D-ring seal (27) with the lubricant being sealed.
   Show/hide table

   Illustration 7	g03799058

9. Install piston (25).

   Note: Assure the piston is seated fully.

   Show/hide table

   Illustration 8	g03799052

   Note: Install damper assembly (24) with the facing material towards the piston.

10. Install damper assembly (24).
    Show/hide table

    Illustration 9	g03798857

    Note: Lubricate friction discs (22) with the lubricant that is being sealed.

11. Install seven friction discs (22) and six separator plates (23) in alternating order beginning with the friction discs.

12. Install six springs (21). Use Tooling (C) to install Duo-Cone seal (20). Refer to Special Instructions, SEHS8364, "Assembly and Installation of Conventional Duo-Cone Seals" for the correct procedure.
    Show/hide table

    Illustration 10	g03798855

    Note: Lubricate the O-ring seals with the lubricant that is being sealed.

13. Install O-ring seals (19) and O-ring seal (18). Install springs (17). Install three rod adjusters (16).
    Show/hide table

    Illustration 11	g03798824

    Note: Damper assembly (15) may have retained with spindle assembly (11) when spindle assembly (11) was removed.

14. Install damper assembly (15) with the facing up.
    Show/hide table

    Illustration 12	g03798821

15. Install bearing cone (14). Use Tooling (C) to install Duo-Cone seal (13). Refer to Special Instructions, SEHS8364, "Assembly and Installation of Conventional Duo-Cone Seals" for the correct procedure.
    Show/hide table

    Illustration 13	g03798820

    Show/hide table

    Improper assembly of parts that are spring loaded can cause bodily injury. To prevent possible injury, follow the established assembly procedure and wear protective equipment.

16. Use Tooling (B) and a suitable lifting device to install spindle assembly (11). The weight of spindle assembly (11) is approximately 105 kg (232 lb).

17. Install four of bolts (12) equally spaced.

18. Tighten four of bolts (12) in 90 degrees intervals in a crisscross pattern.

    Note: To avoid damaging the O-ring seals for the rod adjusters, tighten bolts (12) to spindle assembly (11) in a crisscross pattern, so the spindle assembly (11) remains level during installation.

19. Install the remaining bolts (12) in crisscross pattern.
    Show/hide table

    Illustration 14	g03798427

20. Install bearing cone (10).

21. Perform the following steps for the shimming procedure:
    Show/hide table

    Illustration 15	g03860065

    Show/hide table

    Illustration 16	g03860043

    Show/hide table

    Illustration 17	g03860053

    1. Measure the thickness of retainer plate (8) at the locations of the three small holes (X). Calculate the average thickness of the retainer.

    2. Use two people to position hub assembly (9). The weight of hub assembly (9) is approximately 30 kg (65 lb).

    3. Install retainer plate (8) without any shims. Install three bolts (7) evenly spaced next to three small holes (X).

    4. Tighten bolts (7) to a torque of 100 N·m (74 lb ft). Rotate the wheel several revolutions.

    5. Again, tighten bolts (7) to a torque of 100 N·m (74 lb ft). Again, rotate the wheel several revolutions.

    6. Loosen bolts (7).

    7. Torque bolts (7) to 40 N·m (30 lb ft). Rotate the wheel for several revolutions.

    8. Repeat Step 21g until the torque of bolts (7) remains at 40 N·m (30 lb ft).

    9. Use a depth micrometer to measure through three small holes (X) in retainer plate (8) to the end of the spindle. Use the three measurements to determine the average depth.

       Note: Be sure not to place the depth micrometer on the raised part markings on the retainer plate.

    10. Subtract the average thickness determined in Step 21a from the average depth determined in Step 21i. The outcome is the dimension of the gap that is between the end of the spindle and retainer plate (8).

    11. Use two people to position hub assembly (9). The weight of hub assembly (9) is approximately 30 kg (65 lb). Remove retainer plate (8) from the spindle. Install a shim pack that is equal to the dimension (average gap) from Step 21j plus 0.10 mm. The tolerance range from the shim pack is ± 0.025 mm.

    12. Install retainer plate (8) and all bolts (7). Tighten bolts (7) in a crossing sequence to a torque of 150 ± 20 N·m (111 ± 15 lb ft).
    Show/hide table

    Illustration 18	g03798389

22. Install wear indicator (6).
    Show/hide table

    Illustration 19	g03798387

23. Install speed sensor (4) and bolt (5).
    Show/hide table

    Illustration 20	g03798383

24. Use a suitable lifting device to remove spindle, service brake, and wheel (3) from Tooling (A). The weight of spindle, service brake, and wheel (3) is approximately 463 kg (1020 lb).
    Show/hide table

    Illustration 21	g03798380

25. Install gear (2) and retaining ring (1).

End By:

1. Install the spindle, the service brake, and the wheel.

2. Install the final drive.

3. Reset the service brake wear indicator. Refer to Testing and Adjusting, "Service Brake Wear Indicator (New Brake Disc) - Reset" M0073366. for the correct procedure.

4. Reset the service brake piston. Refer to "Brake Piston - Adjust or Reset" within Testing and Adjusting, "Service Brake Wear Indicator - Check" , M0073366. for the correct procedure.

5. Purge the service brakes. Refer to Systems Operations, "Service Brake Air - Purge" for the correct procedure.