312C Excavator Machine Systems Main Hydraulic Pump - Remove Caterpillar


Main Hydraulic Pump - Remove
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1.1. Removal Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
138-7575  Link Bracket 
ZZ  6V-9509  Face Seal Plug 
6V-9830 Cap As 
6V-9511 Face Seal Plug 
6V-9832 Cap As 
6V-9510 Face Seal Plug 
6V-9831 Cap As 
6V-9512 Face Seal Plug 
6V-9833 Cap As 
9U-7092 Tapered Cap/Plug 

Start By:

  1. Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".

  2. Remove the muffler. Refer to Disassembly and Assembly, "Muffler - Remove".

Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN PHOTOGRAPHS IN THE REMOVAL OR IN THE INSTALLATION. THIS TOOLING IS SHOWN IN ORDER TO ASSIST THE EXPERIENCED SERVICEMAN.

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


NOTICE

Keep all parts clean from contaminants.

Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components.

To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly.

Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination.



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 hydraulic oil pressure and hot oil.

Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.

Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.


  1. Drain the hydraulic tank into a suitable container for storage or for disposal. The capacity of the hydraulic tank is approximately 150 L (40 US gal).


    Illustration 1g00816174

  2. Remove sheet (1) which is located under the flywheel housing. The sheet is part of the bottom guard group.

  3. Open the right, rear door on the machine.


    Illustration 2g00816473

  4. Remove plug (2) in order to drain the remaining oil.

  5. After the oil is drained, install plug (2).


    Illustration 3g00816276

  6. Remove two clips (3). Cut four cable straps (4).

  7. Remove the upper sheet assembly (6) and the lower sheet assembly (7). Together, the sheet assemblies separate the engine compartment from the pump compartment. Remove the sheet (support) (5).


    Illustration 4g00816588

  8. Disconnect hose assemblies (8), (9), (10), (11), and (12).


    Illustration 5g00816640

  9. Disconnect hose assemblies (13), (14), (15), and (16).


    Illustration 6g00816643

  10. Disconnect tee assembly (17) from the main hydraulic pump. Remove bolts (18) from pipe assembly (19).


    Illustration 7g00816699

  11. Remove bolt (20) from the clip. Disconnect harness assemblies (21). Disconnect hose assembly (22).


    Illustration 8g00816735

  12. Disconnect harness assemblies (23) and remove bolt (24) from the clip.


    Illustration 9g00995524

  13. Attach Tooling (A) and a suitable lifting device to the main hydraulic pump (26). The weight of main hydraulic pump (26) is approximately 136 kg (300 lb).


    Illustration 10g00816755

  14. Remove bolts (25) and main hydraulic pump (26).


    Illustration 11g00816757

  15. Remove bolts (27) which fasten coupling (28) to hub (29).


    Illustration 12g00816760

  16. Remove setscrews (30) which fasten the hub to the pump shaft.

Information System:

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3500B Engines for 5130B and 5230B Excavators E039 Low Engine Oil Pressure Derate
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5230B Excavator Machine Systems Pilot Valve (Implement) - Remove
305 CR Mini Hydraulic Excavator Hydraulic System Travel on Level Ground - Test - Optional Test
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