Removal Procedure
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Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed. Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death. Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder. |
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| NOTICE |
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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 Dealer Service Tool Catalog" 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 hoses, on all hose assemblies, on all wires, and on all tube assemblies for installation purposes. Plug all hose assemblies and all tube assemblies. This helps to prevent fluid loss, and this helps to keep contaminants from entering the system.
Note: Cleanliness is an important factor. Before you begin the removal procedure, the exterior of the components should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.
- Fully retract the stick cylinder and the bucket cylinder. Position the bucket on the ground.
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| Illustration 1 | g01185774 |
- Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
- In order to release the hydraulic pressure from load control valve (3) , remove cap (1) and loosen fitting (2) (not shown). Remove cap (5) . Mark the position of screw (4) . Count the number of turns and turn screw (4) (not shown) counterclockwise until hydraulic oil is released from fitting (2) (not shown). Return screw (4) (not shown) to the original position and install cap (5) . Tighten fitting (2) (not shown) and install cap (1) .
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| Illustration 2 | g01189024 |
- Disconnect hose assemblies (7) and (8) .
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| Illustration 3 | g01188989 |
- Disconnect tube assembly (9) .
- Remove clamps (6) and remove load control valve (3) .
Installation Procedure
| NOTICE |
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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 Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
Note: Cleanliness is an important factor. Before you begin the assembly procedure, the exterior of the components should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.
- Position load control valve (3) and install clamps (6) .
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| Illustration 4 | g01188989 |
- Connect tube assembly (9) .
- Connect hose assemblies (7) and (8) .