312C Excavator Machine Systems Tank and Filter (Hydraulic) - Remove Caterpillar


Tank and Filter (Hydraulic) - Remove
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312C Excavator Machine Systems [RENR7476]
HYDRAULIC SYSTEM
FILTER GP
312C Excavator Machine Systems Tank and Filter (Hydraulic) - Remove
312C Excavator Machine Systems Tank and Filter (Hydraulic) - Install
1.1. Removal Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
138-7575  Link Bracket 
ZZ  6V-9510  Face Seal Plug 
6V-9512 Face Seal Plug 
6V-9831 Cap As 
6V-9833 Cap As 

Start By:

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

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

Note: A hydraulic oil sample should be obtained before any maintenance is performed in order to establish the system contaminant level. Refer to Operation and Maintenance, "Sampling Interval and Location of Sampling Valve".

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

Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will help 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.


------ 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). Refer to Operation and Maintenance, "Hydraulic System Oil - Change".


    Illustration 1g00823274

  2. Remove cover (1) and sheet assembly (2).


    Illustration 2g00823279

  3. Remove bolts (3). Loosen clamp (4) and remove the hose from pipe assembly (5).


    Illustration 3g00823282

  4. Loosen clamps (6) and remove hose (7). Remove pipe assembly (5). Refer to Illustration 2 for the location of pipe assembly (5).

  5. Remove support assembly (8) and sheet assembly (9).


    Illustration 4g00823327

  6. Remove clip (10) from the hydraulic tank. Remove bolts (11). Remove bracket (12) with the filters from the hydraulic tank.


    Illustration 5g00823329

  7. Disconnect harness assemblies (13). Remove clip (14). Disconnect wires (15) from the sending unit on the hydraulic tank. Cut cable straps. Disconnect hose assemblies (16).


    Illustration 6g00823441

  8. Remove bolts (18) and (19) and remove clamps (17) and (20).


    Illustration 7g00823453

  9. Remove the bolts and remove tube assembly (21).


    Illustration 8g00823523

  10. Remove storage box cover (22). Remove the vandalism guards from the storage box.


    Illustration 9g00823537

  11. Remove bolt assembly (23). Remove bolts (24). Remove bolts (25). Remove the storage box.


    Illustration 10g00823538

  12. Remove bolts (26) which secure cover (27) on the machine.


    Illustration 11g00823539

  13. Remove bolts (28), bracket (30), and sleeves (29).


    Illustration 12g00823558

  14. Remove bolts (31) and door (32).


    Illustration 13g00823568

  15. Remove sheet assembly (33) which is located under the hydraulic and fuel tanks.


    Illustration 14g00823663

  16. Remove bolts (34) and tube assembly (35).


    Illustration 15g01001296

  17. Attach Tooling (A) and a suitable lifting device on hydraulic tank (42) in order to support hydraulic tank (42). The weight of hydraulic tank (42) is approximately 157 kg (346 lb).


    Illustration 16g00823710

  18. Remove bolts (36).


    Illustration 17g00823717

  19. Slowly move the hydraulic tank until you have access to hose assemblies (37) and (38). Disconnect hose assemblies (37) and (38).


    Illustration 18g01001311

  20. Position hydraulic tank (42) out of the machine. Remove hydraulic oil level switch (39), hydraulic oil filter indicator (40), and temperature sender assembly (41) from hydraulic tank (42).

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