GSH420, GSH425, GSH440, GSH520, GSH525, GSH455 and GSH555 Orange Peel Grapples Hydraulic Rotator - Remove and Install Caterpillar


Hydraulic Rotator - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
439-3939  Link Bracket 
439-3938  Link Bracket 

Start by:

a. Remove the head assembly and bushing.

Note: Cleanliness is an important factor. Before you begin the removal procedure, the exterior of the components should be thoroughly cleaned to prevent dirt from entering the internal mechanism.


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.




    Illustration 1g06029180

  1. Remove bolts (1) and cover plate (2).


    Illustration 2g06029184

  2. Disconnect hose assemblies (3) and remove connectors (4).

  3. Repeat Steps 1 and 2 for the other four locations.


    Illustration 3g06029187


    Illustration 4g06029189


    Illustration 5g06029195

  4. Attach Tooling (A) and a suitable lifting device to hydraulic rotator (5). The weight of hydraulic rotator (5) is approximately 250 kg (551 lb).

  5. Remove plug assembly (6).

  6. Rotate hydraulic rotator (5) to access bolts (7) to remove. Remove bolts (7) and hydraulic rotator (5).


    Illustration 6g06029196

  7. Remove bolts (8) and distributor assembly (9).


    Illustration 7g06029198

  8. Remove O-ring seals (10).


    Illustration 8g06029200

  9. Position the hydraulic rotator onto a suitable blocking. Use Tooling (A) to remove housing group (13) from swivel (12). The weight of housing group (13) is approximately 215 kg (474 lb). Remove bolts (11) and housing group (13).


    Illustration 9g06029202

  10. Remove O-ring seals (14) from the swivel.


    Illustration 10g06029204


    Illustration 11g06029206

  11. Attach Tooling (A) and a suitable lifting device to housing assembly (13). The weight of housing assembly (13) is approximately 145 kg (320 lb). Remove bolts (15) and remove housing assembly (13) from gear assembly (16).

  12. Remove O-ring seals (17) from gear assembly (16).

Installation Procedure

Table 2
Required Tools 
Tool  Part Number  Part Description  Qty 
Loctite 243 

  1. Install hydraulic rotator (2) in the reverse order of removal.

    1. Apply Tooling (A) to the threads of bolts (15). Tighten bolts (15) to a torque of 520 ± 70 N·m (384 ± 52 lb ft).

    2. Apply Tooling (A) to the threads of bolts (11). Tighten bolts (11) to a torque of 105 ± 20 N·m (77 ± 15 lb ft).

    3. Apply Tooling (A) to the threads of bolts (8). Tighten bolts (5) to a torque of 105 ± 20 N·m (77 ± 15 lb ft).

    4. Apply Tooling (A) to the threads of bolts (7). Tighten bolts (7) to a torque of 520 ± 70 N·m (384 ± 52 lb ft).

    5. Tighten bolts (1) to a torque of 105 ± 20 N·m (77 ± 15 lb ft).

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