320D2 GC Excavator Machine Systems Control Manifold (Pilot Oil) - Remove and Install Caterpillar


Control Manifold (Pilot Oil) - 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 
FT-2674  Vacuum Cap 

Start By:

  1. Release the hydraulic system pressure.


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 1g00704703

  1. Remove bolts (2) to remove access cover (1) that is under the main control valve.


    Illustration 2g00690963

  2. Remove the cap from the hydraulic tank. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose to Tooling (A). Apply 276 to 414 kPa (40 to 60 psi) of air. This procedure will pull vacuum on the hydraulic system.

    Note: A small amount of oil will drain from all hose assemblies when the hose assemblies are disconnected from the pilot manifold. Make sure that you contain the hydraulic oil.

  3. Put identification marks on all hose assemblies that are connected to the pilot manifold for installation purposes.


    Illustration 3g01206288

  4. Disconnect harness assemblies (3) from control manifold (5).

  5. Disconnect hose assembly (4).

    Note: Leave the top hose assembly connected. You will be able to remove the top hose assembly, when the mount bolts are removed.



    Illustration 4g01206291

  6. Remove bolts (6).


    Illustration 5g01206296

  7. Disconnect hose assembly (7) and remove control manifold (5).

Installation Procedure



    Illustration 6g00690963

  1. Remove the cap from the hydraulic tank. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose to Tooling (A). Apply 276 to 414 kPa (40 to 60 psi) of air. This procedure will pull vacuum on the hydraulic system.


    Illustration 7g01206296

  2. Position control manifold (5) and connect hose assembly (7).


    Illustration 8g01206291

  3. Install bolts (6).


    Illustration 9g01206288

  4. Connect hose assemblies (4).

    Note: A small amount of oil will drain from all hose assemblies when the plugs are removed from the hose assemblies. Make sure that you contain the hydraulic oil.

  5. Connect harness assemblies (3) to control manifold (5).

  6. Remove Tooling (A) and install the cap to the hydraulic tank.


    Illustration 10g00704703

  7. Position access cover (1) and install bolts (2) that are under the main control valve.

Information System:

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320D2 GC Excavator Machine Systems Control Manifold (Pilot Oil) - Disassemble - Hydraulic Lockout, Swing Brake, Travel
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320D2 GC Excavator Machine Systems Pressure Reducing Valve - Remove and Install
320D2 GC Excavator Machine Systems Pressure Reducing Valve - Disassemble
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320D2 GC Excavator Machine Systems Main Control Valve - Remove and Install
320D2 GC Excavator Machine Systems Main Control Valve - Disassemble