784C and 785C Off-Highway Trucks Machine Systems Caterpillar


Steering Cylinder - Remove

Usage:

785C 1HW

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
4C-3386  Spanner Wrench 
5S-6084  Socket (3 1/2 inch) 
478-3993 Hydraulic Torque Wrench 
385-3995 Hydraulic Pump Gp 
384-8916(1) Hydraulic Pump Gp 
231-4904  Wedge 
1U-7505  Hydraulic Jack 
485-8004 Support Stand 
Retaining Ring Pliers 
(1) Available Substitute


NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.

Dispose of all fluids according to local regulations and mandates.


------ WARNING! ------

Personal injury can result from hot oil or hot components.

At operating temperature, oil is hot and under pressure. Hot oil can cause burns.

Remove the fill cap only when the engine is stopped, and the fill cap is cool enough to touch with your bare hand.

Do not allow hot oil or components to contact skin.


    Note: Cleanliness is an important factor. Before the removal procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.

    Note: Put identification marks on all hose assemblies and on all tube assemblies for installation purposes. Plug all hose assemblies and all tube assemblies. This helps to prevent fluid loss and this helps to prevent contaminants from entering the system.

  1. Drain the hydraulic oil from the steering hydraulic tank into a suitable container. The steering hydraulic tank contains approximately 91 L (24 US gal). Refer to Operation and Maintenance Manual, SEBU7173, "Steering System Oil - Change".


    Illustration 1g00927753
    Rod end of cylinder


    Illustration 2g00927762
    Head end of cylinder


    Illustration 3g00927758
    Rod end of cylinder

  2. Disconnect lubrication hose assembly (1) from the plug (2) at each end of the steering cylinder (4).

  3. Disconnect hose assembly (3) from each end of the steering cylinder (4).


    Illustration 4g00939565

  4. Use Tooling (E) to remove retaining ring (5). Remove retaining ring (5) and plug (2) from each end of the ball stud.


    Illustration 5g00939668

  5. Install Tooling (A) to hold the ball stud (6) while the locknut (7) is being loosened.


    Illustration 6g00939605
    Shown for photo purposes

    Note: Do not remove the locknut (7) completely from the rod assembly (6) until the rod assembly has been broken loose from the taper.

  6. Use Tooling (B) to loosen the locknut (7). Loosen the locknut until the locknut is even with the bottom of the ball stud (6).


    Illustration 7g00941210
    The tooling is shown on the steering link instead of the steering cylinder for photo purposes.

  7. Position Tooling (C) just between the steering cylinder (4) and the steering arm (8), as shown.

  8. Strike Tooling (C) with a hammer.

  9. Repeat Steps 5 through 8 to loosen the ball stud at the opposite end of steering cylinder.


    Illustration 8g00939636

  10. Position Tooling (D) to support the weight of the steering cylinder (4). The weight of the steering cylinder is approximately 136 kg (300 lb).

  11. Remove locknut (7) from each ball stud (6).

  12. Remove steering cylinder (4).

  13. Repeat Steps 2 through 12 to remove the remaining steering cylinder.


    Illustration 9g00939684

  14. Use a suitable press to remove spherical bearing race (10) and ball stud (6) at each end of the steering cylinder (4).

  15. Remove retaining ring (9) that holds spherical bearing race (10) to each ball stud (6). Remove the spherical bearing race (10) from each ball stud.

  16. Repeat Steps 14 through 15 for the remaining steering cylinder.

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