320D2 GC Excavator Machine Systems Counterbalance Valve (Travel) - Remove and Install Caterpillar


Counterbalance Valve (Travel) - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

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.



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.


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

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

To prevent possible personal injury, release the pressure in the work tool hydraulic circuit (boom, stick, bucket, and swing), travel circuits, and the hydraulic oil tank at the filler cap before any hydraulic lines or components are disconnected or removed.

Remove the filler cap only when the engine is stopped and the filler cap is cool enough to touch.


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.



    Illustration 1g00651025

  1. Remove bolts (1) and remove travel motor guard (2).


    Illustration 2g01302400

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


    Illustration 3g01220056

  3. Remove bolts (5) and counterbalance valve (6).


    Illustration 4g00901070

  4. Remove O-ring seals (7) and (8).

Installation Procedure


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.


Note: Check the O-ring seals, the gaskets, and the seals for wear or for damage. Replace the components, if necessary.



    Illustration 5g00901215

  1. Install O-ring seal (8) and (7).


    Illustration 6g01220056

  2. Position counterbalance valve (6) on the travel motor. Install bolts (5). Tighten bolts (5) to a torque of 80 ± 8 N·m (59 ± 6 lb ft).


    Illustration 7g01302400

  3. Install hose assemblies (4) and (3).

  4. Check the hydraulic oil level.


    Illustration 8g00651025

  5. Position travel motor guard (2) on the machine.

  6. Install bolts (1). Tighten bolts (1) to a torque of 130 ± 10 N·m (96 ± 7 lb ft).

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