621G and 627G Wheel Tractor-Scrapers Machine Systems Caterpillar


Hydraulic Tank - Remove

Usage:

621G ALP

Removal Procedure

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     138-7573     Link Bracket     2    
B     138-7575     Link Bracket     2    

Start By:

  1. Remove the muffler. Refer to Disassembly and Assembly, "Muffler - Remove and Install" for the Engine Supplement.
  2. Remove the precleaner. Refer to Disassembly and Assembly, "Precleaner - Remove and Install" for the Engine Supplement.

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

At operating temperature the implement hydraulic oil tank is hot and under pressure. Hot oil can cause burns.

To prevent possible injury, release the pressure in the implement hydraulic system before hydraulic lines or components are disconnected or removed.

----------------------


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, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.

Dispose of all fluids according to local regulations and mandates.


Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses and tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.

  1. Park the machine on a hard, level surface. Lower the scraper bowl to the ground and engage the parking brake. Chock the wheels in order to prevent the machine from moving.

  1. Drain the hydraulic tank. Drain the fluid into a suitable container. The hydraulic tank has a capacity of 180 L (48 US gal).



    Illustration 1g00839357

    Wiring harness (2) is located on the side of the hydraulic tank.

  1. Disconnect two clips (1). Move wiring harness (2) out of the way.



    Illustration 2g00839362

  1. Disconnect electrical connection (3) .

  1. Remove two bolts (4). Place the following components on top of the engine: the fuel lines and the fuel filters.



    Illustration 3g00839405

  1. Remove ten bolts (5). Remove ladder (6) .



    Illustration 4g00839419

  1. Disconnect clip (7) .



    Illustration 5g00839421

  1. Remove four bolts (8). Disconnect hydraulic inlet tube assembly (9) from the hydraulic tank. Remove the O-ring seal.

    Note: Drain the hydraulic line assemblies downstream in order to reduce hydraulic fluid loss.




    Illustration 6g00839432

  1. Loosen two nuts (10) in order to pry the hydraulic tube assembly away from the tank.



    Illustration 7g00791542

  1. Attach Tool (B) and a suitable lifting device to the fender.



    Illustration 8g00839434

  1. Remove six bolts (11) from the fender.



    Illustration 9g00839437

  1. Remove three bolts (12) .

  1. Remove the fender from the machine. The weight of the fender is 80 kg (176 lb).



    Illustration 10g00839439

  1. Remove four bolts (14) from hydraulic tube assembly (13). Disconnect hydraulic tube assembly (13) from the hydraulic tank. Remove the O-ring seal.



    Illustration 11g00791648

  1. Attach Tooling (A) and Attach Tooling (B) and a suitable lifting device to the hydraulic tank.

  1. Remove the sixteen bolts and washers that secure the tank to the machine. Remove the hydraulic tank. The weight of the hydraulic tank is 278 kg (613 lb).

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