Start By:
- Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
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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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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. |
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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 Tools and Shop Products Guide" 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 lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, all hoses and all tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.
- Attach a suitable lifting device to boom cylinder (1).
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Illustration 2 g00779089 - Disconnect hose assemblies (2) and (3).
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Illustration 3 g00779090 - Remove bolt (6), washer (5), and pin (4).
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Illustration 4 g01088651 - Remove the nut, bolt (7), and pin (8).
- Remove boom cylinder (1). The weight of the boom cylinder is approximately
147 kg (325 lb) .
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| Illustration 1 | g00779081 |
| 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 Tools and Shop Products Guide" 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 lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, all hoses and all tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.
- Attach a suitable lifting device to boom cylinder (1).
- Place the boom cylinder in position on the machine. The weight of the boom cylinder is
147 kg (325 lb) .Show/hide table
Illustration 6 g00779091 - Install pin (8), bolt (7), and the nut.
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Illustration 7 g00779090 - Install pin (4).
Note: Be sure that the pin goes through the locking mechanism.
- Install washer (5) and bolt (6).
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Illustration 8 g00779089 - Connect hose assemblies (3) and (2).
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| Illustration 5 | g00779081 |
