793C Off-Highway Truck Machine Systems Caterpillar

Assembly Procedure

Show/hide table

Illustration 1	g00485274

1. Install wear ring (21) in housing assembly (2).
   Show/hide table

   Illustration 2	g00485272

   Show/hide table

   Illustration 3	g00485911

2. Install seal (19) in housing assembly (2).

3. Install seal (20) in housing assembly (2).

   Note: Seal (20) may need to be tapped with a plastic hammer in order to be seated.

   Show/hide table

   In order to prevent possible personal injury, use a suitable fixture to support the weight of the suspension cylinder. Do not attempt to stand the suspension cylinder on end without the use of a suitable support. Failure to use a suitable support fixture could result in injury or death to personnel in this area.

   Show/hide table

   Illustration 4	g00485916

4. Use Tool (B) and a suitable hoist to position housing assembly (2) so the axis of the housing is vertical. Use a suitable fixture to support the housing.

   Note: Apply 129-1967 Grease or an equivalent lubricant to the inside of housing assembly (2).

   Show/hide table

   Illustration 5	g00485919

   Show/hide table

   Illustration 6	g00485945

   Show/hide table

   Illustration 7	g00485948

   Show/hide table

   Illustration 8	g00485950

5. Install seal (11) on gland (12).

6. Turn over gland (12). Install wear ring (13) in gland (12).

7. Install seal assemblies (14) and (15) on gland (12).

   Note: Before assembly, apply 129-1967 Grease or an equivalent lubricant to the inner diameter of gland (12).

   Show/hide table

   Illustration 9	g00485952

8. Use Tool (A), two 3/8 inch - 16 NC bolts, and a suitable hoist to lift gland (12). Gland (12) weighs approximately 24.4 kg (53.79 lb).

   Note: Before assembly, apply 129-1967 Grease or an equivalent lubricant to the outer diameter of gland (12).

   Show/hide table

   Illustration 10	g00485955

9. Use a suitable driver plate and a hydraulic press to press gland assembly (12) into position in housing assembly (2).

10. Use Tool (B) and a suitable hoist to remove housing assembly (2) from the fixture. Place housing assembly (2) on a level surface. Support the housing with blocking.
    Show/hide table

    Illustration 11	g00485271

11. Install seal (18) on end (16).
    Show/hide table

    Illustration 12	g00485269

12. Use a 4.5 kg (9.92 lb) rubber mallet to seat end assembly (16) in rod (7).

13. Install three-piece retainer (17) in the slot in rod (7).

14. Use a 1/2 inch -13 NC threaded hole in end assembly (16) to pull end assembly (16) into position.
    Show/hide table

    Illustration 13	g00485268

15. Install ball (10) and piston (6) onto rod (7). Piston (6) weighs approximately 72 kg (158.7 lb).
    Show/hide table

    Illustration 14	g00485262

16. Align the bolt holes between rod (7) and piston (6). Install 16 bolts (9) and the 16 washers. Tighten bolts (9) to a torque of 800 ± 100 N·m (590.1 ± 73.8 lb ft).
    Show/hide table

    Illustration 15	g00485261

17. Install wear ring (8) on piston (6).
    Show/hide table

    In order to prevent possible personal injury, use a suitable fixture to support the weight of the front suspension cylinder rod. Do not attempt to stand the front suspension cylinder rod on end without the use of a suitable support. Failure to use a suitable support fixture could result in injury or death to personnel in this area.

    Show/hide table

    Illustration 16	g00486002

18. Use Tool (B) and a suitable hoist to position rod assembly (7) so the axis of the rod assembly is vertical. Use a suitable fixture to support the weight of the rod assembly. Rod (7) weighs approximately 801 kg (1765.9 lb).

19. Use Tool (B) and a suitable hoist to install housing assembly (2) on rod assembly (7). Housing assembly (2) weighs approximately 435 kg (959.01 lb).

    Note: Lubricate the rod and the housing before assembly. This will make assembly easier. This will also maintain the lubrication in the front suspension.

    Show/hide table

    Illustration 17	g00486004

20. Use Tool (B) and a suitable hoist to remove the front suspension from the fixture. Place the front suspension on a level surface so the axis is horizontal. Support the front suspension with blocking.
    Show/hide table

    Illustration 18	g00486009

21. Before the assembly of head (1), apply 129-1967 Grease or an equivalent lubricant to the inner diameter of housing assembly (7).
    Show/hide table

    Illustration 19	g00486015

22. Install seal assembly (25) to head (1).
    Show/hide table

    Illustration 20	g00486011

23. Place 24 bolts (4) and the 24 washers into position in head assembly (1).
    Show/hide table

    Illustration 21	g00485034

24. Use 24 bolts (4) and 24 washers to install head (1) onto housing assembly (2). Head (1) weighs approximately 136 kg (299.8 lb). Tighten bolts (4) to a torque of 800 ± 100 N·m (590.1 ± 73.8 lb ft).

25. If necessary, weld plate (3) and two plates (5) into the position that is shown.

26. If the front suspension will be painted after assembly, use tape to cover the three plates.
    Show/hide table

    Illustration 22	g00485276

27. Install plug (22) and fitting (23) in the housing assembly.

28. Install two plugs (24) (not shown) on the opposite side of the housing assembly.

End By:

1. Install the front suspension. Refer to Disassembly and Assembly, "Front Suspension (Cylinder) - Install" for the correct procedure.